1
|
Li W, Hu J. Photodegradation of the novel herbicide pyraclonil in aqueous solution: Kinetics, identification of photoproducts, mechanism, and toxicity assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 357:124381. [PMID: 38906402 DOI: 10.1016/j.envpol.2024.124381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 06/07/2024] [Accepted: 06/15/2024] [Indexed: 06/23/2024]
Abstract
Pyraclonil is a new type of pyrazole herbicide, whose photochemical fate in aqueous solution has not been reported yet. In this study, effects on the photolysis rate such as light source, pH, NO3-, Fe3+, fulvic acid (FA) and riboflavin (RF) were investigated. Pyraclonil photodegraded in pure water under both UV and simulated sunlight with half-lives of 32.29 min and 42.52 h, respectively. Under UV, the degradation rate of pyraclonil in pH 4 solution (0.0299 ± 0.0033 min-1) was about twice higher than that in pH 9 (0.0160 ± 0.0063 min-1). Under simulated sunlight, low concentration (0.1-1 mg/L) of FA, NO3-, Fe3+ and RF noticeably promoted the photodegradation of pyraclonil. Then, with the combination of experimental UPLC-Q-TOF/MS and computational calculation of density functional theory (DFT), fourteen transformation products (TPs) of pyraclonil were identified with possible mechanism of C-N bond cleavage, photorearrangement, demethylation, hydroxylation and oxidation. Additionally, acute toxicity assessment was conducted through ECOSAR prediction and laboratory bioassays. The prediction results indicated that toxicity of TP157 to daphnid and green algae was 1.3 and 1.4 times higher than that of the parent, respectively. The bioassay results indicated that toxicities of TP157 and TP263 to C. vulgaris were about 1.6 and 5.9 times higher than that of the parent, respectively. The results provided a reference for elucidating the potential hazards of pyraclonil to non-target organisms and promoting its rational use.
Collapse
Affiliation(s)
- Wei Li
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jiye Hu
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| |
Collapse
|
2
|
Wang K, Wang G, Zhou L, Zeng Y, Zhang Y, Fang Z. Rapid removal of decabromodiphenyl ether by mechanochemically prepared submicron zero-valent iron with FeC 2O 4·2 H 2O layers: Kinetics, mechanisms and pathways. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133309. [PMID: 38185080 DOI: 10.1016/j.jhazmat.2023.133309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/10/2023] [Accepted: 12/16/2023] [Indexed: 01/09/2024]
Abstract
The utilization of nano zero-valent iron (nZVI) in polybrominated diphenyl ethers remediation has been studied extensively. However, challenges in balancing cost and reactivity have been encountered. A submicron zero-valent iron coated with FeC2O4·2 H2O layers (OX-smZVI) was synthesized via a mechanochemical method, aiming to resolve this contradiction. Characterization via SEM, TEM, and XPS confirmed the structure as FeC2O4·2 H2O coated iron lamellate with a surface area 24-fold higher than ball-milled zero-valent iron (smZVI). XRD highlighted an Fe/C eutectic in OX-smZVI, boosting its electron transfer capacity. Decabromodiphenyl ether degradation by OX-smZVI follows a two-stage process, with initial degradation by FeC2O4·2 H2O and a subsequent phase dominated by electron transfer. OX-smZVI exhibits a 4.52-34.40 times faster BDE209 removal rate than nZVI and scaled-up OX-smZVI displayed superior reactivity with preparation costs only 1/680 of nZVI. Given its enhanced reactivity and cost-efficiency, OX-smZVI emerges as a promising replacement for nZVI.
Collapse
Affiliation(s)
- Kuang Wang
- College of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Province Environmental Remediation Industry Technology Innovation Alliance, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China
| | - Guan Wang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Long Zhou
- College of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Province Environmental Remediation Industry Technology Innovation Alliance, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China
| | - Yuan Zeng
- College of Environment, South China Normal University, Guangzhou 510006, China
| | - Yifeng Zhang
- Department of Environmental and Resource Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Zhanqiang Fang
- College of Environment, South China Normal University, Guangzhou 510006, China; Guangdong Province Environmental Remediation Industry Technology Innovation Alliance, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China.
| |
Collapse
|
3
|
Wang G, Li C, Liu S, Xing Z, Guo P, Hao Z, Li M, Wang H, Rong G, Liu Y. Disclosing phototransformation mechanisms of decabromodiphenyl ether (BDE-209) in different media by simulated sunlight: Implication by compound-specific stable isotope analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:14980-14989. [PMID: 38286932 DOI: 10.1007/s11356-024-32203-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 01/22/2024] [Indexed: 01/31/2024]
Abstract
As one of the typical brominated flame retardants, decabromodiphenyl ether (BDE-209) has been widely detected in environment. However, scarce information was available on BDE-209 phototransformation mechanisms in various media. In this study, compound-specific stable isotope analysis was first applied to investigate BDE-209 phototransformation in n-hexane, MeOH:H2O (v:v, 8:2), and simulated seawater by simulated sunlight. BDE-209 transformation followed pseudo-first-order kinetic, with degradation rate in the following of n-hexane (2.66 × 10-3 min-1) > simulated seawater (1.83 × 10-3 min-1) > MeOH:H2O (1.41 × 10-3 min-1). Pronounced carbon isotope fractionation was first observed for BDE-209 phototransformation, with carbon isotope enrichment factors (εC) of -1.01 ± 0.14‰, -1.77 ± 0.26‰, -2.94 ± 0.38‰ in n-hexane, MeOH:H2O and simulated seawater, respectively. Combination analysis of products and stable carbon isotope, debromination with cleavage of C-Br bonds as rate-limiting step was the main mechanism for BDE-209 phototransformation in n-hexane, debromination and hydroxylation with cleavage of C-Br bonds as rate-limiting steps in MeOH:H2O, and debromination, hydroxylation and chlorination in simulated seawater. This present study confirmed that stable carbon isotope analysis was a robust method to discovery the underlying phototransformation mechanisms of BDE-209 in various solutions.
Collapse
Affiliation(s)
- Guoguang Wang
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China.
| | - Chuanyuan Li
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Shuaihao Liu
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Ziao Xing
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Pengxu Guo
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Zixuan Hao
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Maojiao Li
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Haixia Wang
- Navigation College, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Guangzhi Rong
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| | - Yu Liu
- College of Environmental Science and Engineering, Dalian Maritime University, No.1 Linghai Road, 116026, Dalian, People's Republic of China
| |
Collapse
|
4
|
Lan Y, Gao X, Xu H, Li M. 20 years of polybrominated diphenyl ethers on toxicity assessments. WATER RESEARCH 2024; 249:121007. [PMID: 38096726 DOI: 10.1016/j.watres.2023.121007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 11/17/2023] [Accepted: 12/09/2023] [Indexed: 01/03/2024]
Abstract
Polybrominated diphenyl ethers (PBDEs) serve as brominated flame retardants which continue to receive considerable attention because of their persistence, bioaccumulation, and potential toxicity. Although PBDEs have been restricted and phased out, large amounts of commercial products containing PBDEs are still in use and discarded annually. Consequently, PBDEs added to products can be released into our surrounding environments, particularly in aquatic systems, thus posing great risks to human health. Many studies and reviews have described the possible toxic effects of PBDEs, while few studies have comprehensively summarized and analyzed the global trends of their toxicity assessment. Therefore, this study utilizes bibliometrics to evaluate the worldwide scientific output of PBDE toxicity and analyze the hotspots and future trends of this field. Firstly, the basic information including the most contributing countries/institutions, journals, co-citations, influential authors, and keywords involved in PBDE toxicity assessment will be visualized. Subsequently, the potential toxicity of PBDE exposure to diverse systems, such as endocrine, reproductive, neural, and gastrointestinal tract systems, and related toxic mechanisms will be discussed. Finally, we conclude this review by outlining the current challenges and future perspectives in environmentally relevant PBDE exposure, potential carriers for PBDE transport, the fate of PBDEs in the environment and human bodies, advanced stem cell-derived organoid models for toxicity assessment, and promising omics technologies for obtaining toxic mechanisms. This review is expected to offer systematical insights into PBDE toxicity assessments and facilitate the development of PBDE-based research.
Collapse
Affiliation(s)
- Yingying Lan
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China; State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Xue Gao
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Haiwei Xu
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.
| | - Minghui Li
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China; Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400030, China.
| |
Collapse
|
5
|
Foster SA, Kile ML, Hystad P, Diamond ML, Jantunen LM, Mandhane PJ, Moraes TJ, Navaranjan G, Scott JA, Simons E, Subbarao P, Takaro TK, Turvey SE, Brook JR. Organophosphate ester flame retardants and plasticizers in house dust and mental health outcomes among Canadian mothers: A nested prospective cohort study in CHILD. ENVIRONMENTAL RESEARCH 2024; 240:117451. [PMID: 37871788 PMCID: PMC10841641 DOI: 10.1016/j.envres.2023.117451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 10/15/2023] [Accepted: 10/17/2023] [Indexed: 10/25/2023]
Abstract
Organophosphate ester flame retardants and plasticizers (OPEs) are common exposures in modern built environments. Toxicological models report that some OPEs reduce dopamine and serotonin in the brain. Deficiencies in these neurotransmitters are associated with anxiety and depression. We hypothesized that exposure to higher concentrations of OPEs in house dust would be associated with a greater risk of depression and stress in mothers across the prenatal and postpartum periods. We conducted a nested prospective cohort study using data collected on mothers (n = 718) in the CHILD Cohort Study, a longitudinal multi-city Canadian birth cohort (2008-2012). OPEs were measured in house dust sampled at 3-4 months postpartum. Maternal depression and stress were measured at 18 and 36 weeks gestation and 6 months and 1 year postpartum using the Centre for Epidemiologic Studies for Depression Scale (CES-D) and Perceived Stress Scale (PSS). We used linear mixed models to examine the association between a summed Z-Score OPE index and continuous depression and stress scores. In adjusted models, one standard deviation increase in the OPE Z-score index was associated with a 0.07-point (95% CI: 0.01, 0.13) increase in PSS score. OPEs were not associated with log-transformed CES-D (β: 0.63%, 95% CI: -0.18%, 1.46%). The effect of OPEs on PSS score was strongest at 36 weeks gestation and weakest at 1 year postpartum. We observed small increases in maternal perceived stress levels, but not depression, with increasing OPEs measured in house dust during the prenatal and early postpartum period in this cohort of Canadian women. Given the prevalence of prenatal and postpartum anxiety and the ubiquity of OPE exposures, additional research is warranted to understand if these chemicals affect maternal mental health.
Collapse
Affiliation(s)
- Stephanie A Foster
- School of Biological and Population Health Sciences, College of Health, Oregon State University, 160 SW 26th St, Corvallis, OR, 97331, USA.
| | - Molly L Kile
- School of Biological and Population Health Sciences, College of Health, Oregon State University, 160 SW 26th St, Corvallis, OR, 97331, USA.
| | - Perry Hystad
- School of Biological and Population Health Sciences, College of Health, Oregon State University, 160 SW 26th St, Corvallis, OR, 97331, USA.
| | - Miriam L Diamond
- Department of Earth Sciences and School of the Environment, University of Toronto, 149 College Street, Suite 410, Fourth Floor, Toronto, ON, M5T 1P5, Canada.
| | - Liisa M Jantunen
- Environment and Climate Change Canada, Government of Canada, Canada.
| | - Piush J Mandhane
- Pediatric Respiratory Medicine, University of Alberta, 11405-87 Avenue Edmonton, Alberta, T6G 1C9, Canada.
| | - Theo J Moraes
- Department of Pediatrics, University of Toronto, 555 University Avenue, Black Wing Room 1436, Toronto, ON, M5G 1X8, Canada.
| | - Garthika Navaranjan
- Dalla Lana School of Public Health, University of Toronto, 155 College Street, Sixth Floor, Toronto, ON, MST 3M7, Canada.
| | - James A Scott
- Dalla Lana School of Public Health, University of Toronto, 155 College Street, Sixth Floor, Toronto, ON, MST 3M7, Canada.
| | - Elinor Simons
- Department of Pediatrics and Child Health, University of Manitoba, 840 Sherbrook Street, University of Manitoba, Winnipeg, MB, R3A 1S1, Canada.
| | - Padmaja Subbarao
- Department of Pediatrics, University of Toronto, 555 University Avenue, Black Wing Room 1436, Toronto, ON, M5G 1X8, Canada; Dalla Lana School of Public Health, University of Toronto, 155 College Street, Sixth Floor, Toronto, ON, MST 3M7, Canada.
| | - Tim K Takaro
- Department of Health Sciences, Simon Fraser University, 8888 University Drive, Blusson Hall, Room 11300, Burnaby, B.C, V5A 1S6, Canada.
| | - Stuart E Turvey
- Pediatric Immunology, The University of British Columbia, 2329 West Mall, Vancouver, BC, V6T 1Z4, Canada.
| | - Jeffrey R Brook
- Dalla Lana School of Public Health, University of Toronto, 155 College Street, Sixth Floor, Toronto, ON, MST 3M7, Canada.
| |
Collapse
|
6
|
Du X, Li H, Liang J, Wang R, Huang K, Hayat W, Cai L, Tao X, Dang Z, Lu G. Hydrogen-Donor-Controlled Polybrominated Dibenzofuran (PBDF) Formation from Polybrominated Diphenyl Ether (PBDE) Photolysis in Solutions: Competition Mechanisms of Radical-Based Cyclization and Hydrogen Abstraction Reactions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7777-7788. [PMID: 37115742 DOI: 10.1021/acs.est.2c08003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Polybrominated dibenzofurans (PBDFs) are characteristic dioxin-like products of polybrominated diphenyl ether (PBDE) photolysis. In this study, competition mechanisms of radical-based cyclization and hydrogen abstraction reactions are proposed in PBDF formation. Commonly, the ortho C-Br bond dissociation during photolysis generates aryl radicals, which undergo intramolecular cyclization to form PBDFs or hydrogen abstraction with hydrogen donors (such as organic solvents and water) to form lower brominated PBDEs. By using 2,4,4'-tribromodiphenyl ether (BDE-28) as the model reactant, the experimental PBDF formation ratios in various solutions are explained quantitatively by the calculated rate constants of cyclization and hydrogen abstraction reactions using the density functional theory (DFT) method. The solvent effect of pure and mixed solvents on PBDF formation is illustrated successfully. The structure-related hydrogen donation ability for hydrogen abstraction controls the bias of competition reactions and influences PBDF formation. Water resulted to be the most significant generation of PBDFs. Fulvic and humic acid display higher hydrogen donation ability than small-molecule organics due to the partitioning effect in aqueous solution. Quantitative structure-activity relationship (QSAR) models of the calculated rate constants for 512 cyclization and 319 hydrogen abstraction reactions using 189 PBDEs as the initial reactants in water are established, revealing the high risk of PBDF formation in aqueous solution.
Collapse
Affiliation(s)
- Xiaodong Du
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Haoliang Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jiahao Liang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Rui Wang
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China
| | - Kaibo Huang
- School of Ecology and Environment, Hainan University, Haikou 570228, China
| | - Waseem Hayat
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Limiao Cai
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Xueqin Tao
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, China
| |
Collapse
|
7
|
Lei M, Tang Y, Zhu L, Tang H. Chemical reductive technologies for the debromination of polybrominated diphenyl ethers: A review. J Environ Sci (China) 2023; 127:42-59. [PMID: 36522073 DOI: 10.1016/j.jes.2022.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 06/17/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are widely used as brominated flame retardants, which had attracted amounts of attention due to their harmful characteristics of high toxicity, environmental persistence and potential bioaccumulation. Many chemical reductive debromination technologies have been developed for the debromination of PBDEs, including photolysis, photocatalysis, electrocatalysis, zero-valent metal reduction, chemically catalytic reduction and mechanochemical method. This review aims to provide information about the degradation thermodynamics and kinetics of PBDEs and summarize the degradation mechanisms in various systems. According to the comparative analysis, the rapid debromination to generate bromine-free products in an electron-transfer process, of which photocatalysis is a representative one, is found to be relatively difficult, because the degradation rate of PBDEs depended on the Br-rich phenyl ring with the lowest unoccupied molecular orbital (LUMO) localization. On the contrary, the complete debromination occurs easily in other systems with active hydrogen atoms as the main reactive species, such as chemically catalytic reduction systems. The review provides the knowledge on the chemical reductive technique of PBDEs, which would greatly help not only clarify the degradation mechanism but also design the more efficient system for the rapid and deep debromination of PBDEs in the future.
Collapse
Affiliation(s)
- Ming Lei
- College of Resources and Environmental Science, South-Central Minzu University, Wuhan 430074, China
| | - Yao Tang
- College of Resources and Environmental Science, South-Central Minzu University, Wuhan 430074, China
| | - Lihua Zhu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Heqing Tang
- College of Resources and Environmental Science, South-Central Minzu University, Wuhan 430074, China.
| |
Collapse
|
8
|
Li X, Liu Y, Yin Y, Wang P, Su X. Occurrence of some legacy and emerging contaminants in feed and food and their ranking priorities for human exposure. CHEMOSPHERE 2023; 321:138117. [PMID: 36775031 DOI: 10.1016/j.chemosphere.2023.138117] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
The "feed-to-food" pathway is one of the most important routes for human exposure to manmade contaminants. The contaminants could threaten human health through the "feed-to-food" route and have recently become of great public concern. This review selects the representative legacy and emerging contaminants (ECs), such as polybrominated diphenyl ethers (PBDEs), novel brominated flame retardants (NBFRs), organophosphate esters (OPEs), short-chain chlorinated paraffins (SCCPs), and per- and polyfluoroalkyl substances (PFASs), regarding their occurrence in feed and food, as well as their metabolites and transport in farming and livestock ecosystems. Factors that might influence their presence and behavior are discussed. This review raises an approach to rank the priority of ECs using the EC concentrations in feed and food and using the hazard quotient (HQ) method for human health. Although SCCPs have the highest levels in feed and food, their potential risks appear to be the lowest. PFASs have the highest HQs on account of human exposure risk. Future research should pay more attention to the combined effects of multiple ECs.
Collapse
Affiliation(s)
- Xiaomin Li
- Institute of Quality Standard and Testing Technology for Agro-Products, The Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
| | - Yifei Liu
- Institute of Quality Standard and Testing Technology for Agro-Products, The Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Yuhan Yin
- Institute of Quality Standard and Testing Technology for Agro-Products, The Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Peilong Wang
- Institute of Quality Standard and Testing Technology for Agro-Products, The Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Xiaoou Su
- Institute of Quality Standard and Testing Technology for Agro-Products, The Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| |
Collapse
|
9
|
Khan AUH, Naidu R, Dharmarajan R, Fang C, Shon H, Dong Z, Liu Y. The interaction mechanisms of co-existing polybrominated diphenyl ethers and engineered nanoparticles in environmental waters: A critical review. J Environ Sci (China) 2023; 124:227-252. [PMID: 36182134 DOI: 10.1016/j.jes.2021.10.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/13/2021] [Accepted: 10/13/2021] [Indexed: 06/16/2023]
Abstract
This review focuses on the occurrence and interactions of engineered nanoparticles (ENPs) and brominated flame retardants (BFRs) such as polybrominated diphenyl ethers (PBDEs) in water systems and the generation of highly complex compounds in the environment. The release of ENPs and BFRs (e.g. PBDEs) to aquatic environments during their usage and disposal are summarised together with their key interaction mechanisms. The major interaction mechanisms including electrostatic, van der Waals, hydrophobic, molecular bridging and steric, hydrogen and π-bonding, cation bridging and ligand exchange were identified. The presence of ENPs could influence the fate and behaviour of PBDEs through the interactions as well as induced reactions under certain conditions which increases the formation of complex compounds. The interaction leads to alteration of behaviour for PBDEs and their toxic effects to ecological receptors. The intermingled compound (ENPs-BFRs) would show different behaviour from the parental ENPs or BFRs, which are currently lack of investigation. This review provided insights on the interactions of ENPs and BFRs in artificial, environmental water systems and wastewater treatment plants (WWTPs), which are important for a comprehensive risk assessment.
Collapse
Affiliation(s)
- Anwar Ul Haq Khan
- Global Centre for Environmental Remediation (GCER), College of Engineering Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), College of Engineering Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Raja Dharmarajan
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Cheng Fang
- Global Centre for Environmental Remediation (GCER), College of Engineering Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Hokyong Shon
- School of Civil and Environmental Engineering, University of Technology Sydney (UTS), City Campus, Broadway, NSW 2007, Australia
| | - Zhaomin Dong
- School of Space and Environment, Beihang University, Beijging 100191, China
| | - Yanju Liu
- Global Centre for Environmental Remediation (GCER), College of Engineering Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), ATC Building, The University of Newcastle, Callaghan, NSW 2308, Australia.
| |
Collapse
|
10
|
Qian B, Zheng ZX, Yang L, Wang CQ, Lin YC, Lin ZN. Prenatal exposure to phthalates and polybrominated diphenyl ethers on neonatal health: A birth cohort study in Guangxi, China. ENVIRONMENTAL RESEARCH 2023; 216:114571. [PMID: 36243047 DOI: 10.1016/j.envres.2022.114571] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 10/06/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
Few epidemiological studies have focused on prenatal phthalates (PAEs) and polybrominated diphenyl ethers (PBDEs) exposure to neonatal health in China. This study aimed to assess the associations between prenatal PAEs and PBDEs exposure and neonatal health in Guangxi, a Zhuang autonomous region of China. Concentrations of 4 PAEs metabolites (mPAEs) and 5 PBDEs congeners were measured in the serum of 267 healthy pregnant women. Birth outcomes and clinical data of neonates were collected after delivery. Mono-(2-Ethylhexyl) phthalate (MEHP) (81.52%) and BDE47 (35.21%) were the mPAEs and PBDEs congeners with the highest detection rate in serum. Prenatal exposures to mono-n-butyl phthalate (MBP), MEHP, and ΣmPAEs were negatively associated with birth weight (BW), birth length (BL), and gestational age (GA). Higher exposures to MBP, MEHP, and ΣmPAEs were associated with an increased odds ratio (OR) for low birth weight (LBW), but exposure to BDE28 exhibited the opposite effect. Moreover, higher exposures to MBP, MEHP, ΣmPAEs, BDE99, and ΣPBDEswere associated with an increased OR for premature birth (PTB) (P < 0.05). In contrast to MBP exposure, BDE28 exposure was associated with a higher OR for neonatal jaundice (NNJ) (P < 0.05). The interaction analysis showed a positive interaction between monoethyl phthalate (MEP) and BDE28 on the risk of NNJ and positive interaction between ΣmPAEs and BDE47 on the risk of NNJ. In addition, there are ethnicity-specific associations of prenatal PBDEs exposure with neonatal health in individuals of Zhuang and Han nationalities, and boy neonates were more sensitive to prenatal PBDEs exposure than girl neonates. The results revealed that prenatal exposure to mPAEs and PBDEs might have adverse effects on neonatal development, and the effects might be ethnicity- and sex-specific.
Collapse
Affiliation(s)
- Bo Qian
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, 361102, China; Department of Occupational and Environmental Health, Guilin Medical University, Guilin, Guangxi, 541004, China
| | - Zhao-Xuan Zheng
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, 361102, China
| | - Lei Yang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, 361102, China
| | - Cheng-Qiang Wang
- Department of Occupational and Environmental Health, Guilin Medical University, Guilin, Guangxi, 541004, China
| | - Yu-Chun Lin
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, 361102, China.
| | - Zhong-Ning Lin
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen, Fujian, 361102, China.
| |
Collapse
|
11
|
Zhang Y, Mao G, Liu R, Zhou X, Bartlam M, Wang Y. Transcriptome Profiling of Stenotrophomonas sp. Strain WZN-1 Reveals Mechanisms of 2,2',4,4'-Tetrabromodiphenyl Ether (BDE-47) Biotransformation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:11288-11299. [PMID: 35881891 DOI: 10.1021/acs.est.2c00197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The brominated flame retardant 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) is extensively used, stable, and difficult to degrade in the environment. The existence of BDE-47 could pose a certain risk to the environment and human health. However, the biotransformation mechanisms of BDE-47 by microorganisms remain unclear. In this study, aerobic degradation of BDE-47 by Stenotrophomonas sp. strain WZN-1 and transcriptome analysis were carried out. BDE-47 degradation by Stenotrophomonas sp. strain WZN-1 was mainly through the biological action of intracellular enzymes via the route of debromination and hydroxylation. The results of the transcriptome sequencing indicated the differentially expressed genes were related to transport, metabolism, and stress response. The key processes involved the microbial transmembrane transportation of BDE-47, energy anabolism, synthesis, and metabolism of functional enzymes, stress response, and other biological processes of gene regulation. In particular, bacterial chemotaxis played a potential role in biodegradation of BDE-47 by Stenotrophomonas sp. strain WZN-1. This study provides the first insights into the biotransformation of Stenotrophomonas sp. strain WZN-1 to BED-47 stress and shows potential for application in remediation of polluted environments.
Collapse
Affiliation(s)
- Yadi Zhang
- Key Laboratory Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300350, China
| | - Guannan Mao
- Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research,Chinese Academy of Sciences, Beijing, 100101, China
| | - Ruidan Liu
- Key Laboratory Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300350, China
| | - Xinzhu Zhou
- Key Laboratory Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300350, China
| | - Mark Bartlam
- College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300071, China
| | - Yingying Wang
- Key Laboratory Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300350, China
| |
Collapse
|
12
|
Cai M, Zhou J, Hao T, Du K. Tolerance of phyllospheric Wickerhamomyces anomalus to BDE-3 and heavy metals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:56555-56561. [PMID: 35347617 DOI: 10.1007/s11356-022-19798-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Few research have focused on the potential microorganism and gene resources for plant resistance to polybrominated diphenyl ether (PBDE) and heavy metal (HM) co-contamination. The purpose of this study was to investigate the impact of phyllospheric Wickerhamomyces anomalus bioremediation ability on PBDE and HM co-contamination. The results showed that the toleration capability of W. anomalus to cadmium (Cd2+) was higher than that to chromium (Cr) or 4-bromodiphenyl ether (BDE-3) contamination. The threshold levels of W. anomalus tolerance to BDE-3, Cd2+, and Cr were 30 mg/L, 500 mg/L, 30 mg/L, respectively. The use of the higher concentration of BDE-3 (30 mg/L) as a carbon source may improve tolerance to Cd2+ and Cr (10 mg/L Cd2+ and 10 mg/L Cr). Overexpression of Wapdr15 gene of ABCG subfamily from W. anomalus improved the tolerance to BDE-3 (10 mg/mL) and Cd2+ (0.5 mg/mL) significantly in transgenic tobacco lines. The synergism effect of BDE-3 and Cd2+ stress existed similarly in W. anomalus and transgenic lines. The findings suggest that W. anomalus should be taken into account for providing an efficient method in improving crops' tolerance during PBDE and HM co-contamination in soil.
Collapse
Affiliation(s)
- Man Cai
- College of Forestry, Hebei Agricultural University, Baoding, 071000, China
- Key Laboratory of Tree Species Germplasm Resources and Forest Protection of Hebei Province, Hebei Agricultural University, 2596 Lekai South Road, Baoding, 071000, China
| | - Jian Zhou
- College of Forestry, Hebei Agricultural University, Baoding, 071000, China
| | - Tian Hao
- College of Forestry, Hebei Agricultural University, Baoding, 071000, China
| | - Kejiu Du
- College of Forestry, Hebei Agricultural University, Baoding, 071000, China.
- Key Laboratory of Tree Species Germplasm Resources and Forest Protection of Hebei Province, Hebei Agricultural University, 2596 Lekai South Road, Baoding, 071000, China.
| |
Collapse
|
13
|
Heterostructured Nanoscale Photocatalysts via Colloidal Chemistry for Pollutant Degradation. CRYSTALS 2022. [DOI: 10.3390/cryst12060790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
With the further acceleration in the industrialization process, organic pollutants and gas pollution in the environment have posed severe threats to human health. It has been a global challenge regarding achieving an efficient solution to pollutant degradation. In such a context, photocatalysts have attracted researchers’ attention for their simplicity, efficiency, cleanliness and low cost. However, the single photocatalyst is facing a research bottleneck owing to its narrow light absorption spectrum and high photocarrier recombination rate. Given that heterojunctions can achieve efficient separation of photogenerated carriers in space, constructing heterostructured photocatalysts has become the most perspective method to improve the performance of photocatalysts. Furthermore, nanoparticles prepared through colloidal chemistry have the characteristics of high dispersion, stability and adsorption, further enhancing the degradation efficiency of heterostructured photocatalysts. This article reviews the primary methods for preparing heterostructured photocatalysts through colloidal chemistry, classifies the heterojunction types by transport routes of photogenerated carriers and summarizes the recent progress of heterostructured photocatalysts in pollutant degradation. To implement environmental remediation, it is crucial to explore economical and efficient photocatalysts for practical applications. It is hoped that this review will stimulate further exploration of colloidal heterostructured photocatalysts for pollutant degradation.
Collapse
|
14
|
Jung J, Shin J, Dzhaparova A, Park JK, Lim M. Photoexcitation dynamics of bromodiphenyl ethers in acetonitrile-d 3 studied by femtosecond time-resolved infrared spectroscopy. Phys Chem Chem Phys 2022; 24:9203-9212. [PMID: 35388852 DOI: 10.1039/d2cp00063f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The efficient decomposition of polybrominated diphenyl ethers (PBDEs), onetime prevalent flame retardants, is central to the reduction of their harmful effects on human health. PBDE photodecomposition is a promising method, but its mechanism and products are not well understood. The photoexcitation dynamics of 3- and 4-bromodiphenyl ethers (BDE-2 and BDE-3) in CD3CN were studied from 0.3 ps to 10 μs using time-resolved infrared spectroscopy. An excitation at 267 nm dissociated the Br atom from BDE-2 and BDE-3 within 0.3 ps and 14 ± 3 ps, respectively, producing a radical compound (R) and a Br atom. About 85% of R formed an intermediate (IM) that weakly interacted with the Br atom and the surrounding CD3CN solvent in 7-12 ps. The remaining R separated from the dissociated Br and underwent slow geminate rebinding (GR) with Br within 35 to 54 ns. The IM competitively engaged in GR with the interacting Br in 40-60 ps or formed CD3CN-bound radical compounds (RS) in 100-130 ps. The RS further degraded via either the dissociation of CD3-producing a cyano-bound diphenyl ether (DE) in 150 or 550 ns-or the deuterium abstraction of CD3CN in 180 or 430 ns-producing a deuterated DE. Overall, 33 ± 3 (22 ± 3)% of the photoexcited BDE-2 (BDE-3) decomposed in CD3CN under 267 nm excitation. Efficient binding of the CD3CN solvent to R deterred the yield-diminishing GR and slowed the rate of product formation. The observed photoexcitation dynamics of BDE suggest methods for the efficient decomposition of PBDE.
Collapse
Affiliation(s)
- Jisik Jung
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea.
| | - Juhyang Shin
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea.
| | - Alina Dzhaparova
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea.
| | - Jin Kyoon Park
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea.
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Korea.
| |
Collapse
|
15
|
Photodegradation of Decabrominated Diphenyl Ether in Soil Suspensions: Kinetics, Mechanisms and Intermediates. Processes (Basel) 2022. [DOI: 10.3390/pr10040718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
Pollution by polybrominated diphenyl ethers (PBDEs) is a major concern due to their bioaccumulation, persistence, and carcinogenicity. This study aimed to investigate the decabrominated diphenyl ether (BDE-209) photodegradation in soil suspensions. The results indicate BDE-209 can degrade in soil suspensions and its degradation follows pseudo-first-order kinetics. The light sources and intensity effects were studied and the photodegradation rates were 500 W Mercury Lamp > 300 W Mercury Lamp > 500 W Xenon Lamp > 300 W Xenon Lamp, which indicates UV light is the main reason for BDE-209 degradation. Soil particle inhibits BDE-209 photodegradation due to the light-shielding effect. BDE-209 photodegradation rates increased from 0.055 to 0.071 h−1 with pH value increasing from 3.5 to 9.5. This may be because the products are more easily produced in higher pH soil suspensions. The presence of humic acid (HA) may inhibit BDE-209 photodegradation by photo-shielding. Fe3+ and Cu2+ have an adverse effect on BDE-209 photodegradation due to the photo competition. The •OH and 1O2 were detected in soil solutions. Analysis of the photoproducts of BDE-209 by gas chromatography mass spectrometry (GC-MS) and liquid chromatography time of flight mass spectrometry (LC-TOF-MS) showed that BDE-209 was mainly debrominated to the lower-brominated BDEs and the reactive oxygen radicals may not lead to BDE-209 degradation.
Collapse
|
16
|
Cheng L, Rao Q, Zhang Q, Song W, Guan S, Jiang Z, Wu T, Zhao Z, Song W. The immunotoxicity of decabromodiphenyl ether (BDE-209) on broiler chicks by transcriptome profiling analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 232:113284. [PMID: 35149409 DOI: 10.1016/j.ecoenv.2022.113284] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/29/2022] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
Decabromodiphenyl ether (BDE-209) has drawn significant attention due to its suppression of immune functions in animals and even humans. In order to explore the mechanism through which BDE-209 affects the immune system, broiler chicks were fed a diet containing various concentrations of BDE-209 (0, 0.004, 0.04, 0.4, and 4 g/kg) for 42 days. Histopathological observations of immune organs found damaged and necrotic lymphocytes in the spleen and bursa, and losses of lymphoid cells in thymic gland. The activities of catalase, glutathione, glutathione peroxidase, and superoxide dismutase in both the spleen and serum were affected by BDE-209. Obvious bioaccumulation effect was found in spleen tissues (high to 1339 ± 181.9 μg/kg). Furthermore, transcriptome sequencing analyses of the spleen identified 424 upregulated and 301 downregulated DEGs, and the cytokine-cytokine receptor interaction signal pathway was most significantly enriched based on the Kyoto Encyclopedia of Genes and Genomes database. Quantitative real-time PCR affirmed the decreased expressions of interleukin IL18, IL18R1, IL18RAP, IL21, as well as interferon gamma IFNG and tumor necrosis factor superfamily members TNFSF8, indicating significant interference to immunomodulation function and possible disease progression in inflammatory effects resulting from BDE-209 exposure. The immunotoxicity of BDE-209 may cause the suppression of immune and physiological functions of spleen cells, leading to inflammation and apoptosis and ultimately spleen atrophy.
Collapse
Affiliation(s)
- Lin Cheng
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China
| | - Qinxiong Rao
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China
| | - Qicai Zhang
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China
| | - Wei Song
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China
| | - Shuhui Guan
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China
| | - Zhilin Jiang
- College of Agriculture and Forestry, Puer University, Yunnan 665000, China
| | - Tian Wu
- College of Agriculture and Forestry, Puer University, Yunnan 665000, China
| | - Zhihui Zhao
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China.
| | - Weiguo Song
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Science, Shanghai 201403, China.
| |
Collapse
|
17
|
Chen Q, Zhang X, Xie Q, Lee YH, Lee JS, Shi H. Microplastics habituated with biofilm change decabrominated diphenyl ether degradation products and thyroid endocrine toxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:112991. [PMID: 34798360 DOI: 10.1016/j.ecoenv.2021.112991] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 11/02/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
Microplastics (MPs) are rapidly colonized by microbial biofilms in a natural aquatic environment, and the nature of the microbial community and type of MP can result in different degradation products of organic pollutants. Here, we quantified the degradation products of a ubiquitously detected pollutant, decabrominated diphenyl ether (BDE-209), under both light-only and biota conditions and in the absence or presence of three kinds of MPs, styrofoam polystyrene, hard polyamide, and polypropylene film. The results showed that the BDE-209 concentration increased by 0.7-2.8 fold in the presence of MPs, probably due to the "sustained release" desorption effect. Under light-only conditions, the penta- and hexa-BDE concentrations in the presence of styrofoam or hard MPs were significantly reduced, which can be deemed a beneficial effect. However, when biota were present, the debromination products increased with the addition of MPs, particularly in the presence of styrofoam MPs. These products caused a 1.7-fold upregulation in triiodothyronine content and a 5.9-fold upregulation of thyroid stimulating hormone β expression in zebrafish larvae. The increase in debromination products could be attributed to the distinct high abundance of the bacteria Chloroflexi, Proteobacteria, and Basidiomycotina on styrofoam MPs that can participate in pollutant degradation. Collectively, our results indicate that MPs can alter the degradation pathways of BDE-209 and increase the toxicity to the endocrine system and the thyroid in aquatic organisms.
Collapse
Affiliation(s)
- Qiqing Chen
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
| | - Xiyang Zhang
- School of Marine Sciences, Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-Sen University, Zhuhai 519000, China
| | - Qiang Xie
- School of Marine Sciences, Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Sun Yat-Sen University, Zhuhai 519000, China
| | - Young Hwan Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Huahong Shi
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China.
| |
Collapse
|
18
|
Cheng F, He J, Li C, Lu Y, Zhang YN, Qu J. Photo-induced degradation and toxicity change of decabromobiphenyl ethers (BDE-209) in water: Effects of dissolved organic matter and halide ions. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125842. [PMID: 33866292 DOI: 10.1016/j.jhazmat.2021.125842] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/30/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
BDE-209 is a widely used brominated flame retardant that is ubiquitous in the aquatic environment, especially in marine water. However, photodegradation of BDE-209 in seawater is still not fully understood. In this work, the photodegradation kinetics of BDE-209 in water was studied and the effects of seawater dissolved organic matter (S-DOM) and halide ions (Cl-, Br-) were evaluated. S-DOM inhibited the degradation of BDE-209 through dynamic quenching and light shielding effect. However, with the coexistence of S-DOM, Cl- and Br-, the photodegradation of BDE-209 was significantly promoted. The promotional effect is attributed to the generation of excited triplet state S-DOM, singlet oxygen, and reactive halogen radicals. The results of density functional theory calculation showed that •Cl addition reaction on C-Br sites of BDE-209 is the main reaction pathway of BDE-209 with chlorine radical, which leads to the generation of mixed Cl/Br substituted intermediates. The acute toxicity and estrogenic effects of BDE-209 solution were enhanced during simulated sunlight irradiation. These results indicate that the environmental factors in seawater play important roles in the photodegradation of BDE-209, and contribute to the potential ecological risks of PBDEs in the marine environment.
Collapse
Affiliation(s)
- Fangyuan Cheng
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Jiale He
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Chao Li
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Ying Lu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Ya-Nan Zhang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China.
| | - Jiao Qu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China.
| |
Collapse
|
19
|
Huang K, Liang J, Jafvert CT, Li Q, Chen S, Tao X, Zou M, Dang Z, Lu G. Effects of ferric ion on the photo-treatment of nonionic surfactant Brij35 washing waste containing 2,2',4,4'-terabromodiphenyl ether. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125572. [PMID: 33725551 DOI: 10.1016/j.jhazmat.2021.125572] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The effects of ferric iron on the photo-treatment of simulated BDE-47 (2,2',4,4'- terabromodiphenyl ether)-Brij35 (Polyoxyethylene lauryl ether) washing waste were studied to evaluate the influences of ferric iron on BDE-47 removal and Brij35 recovery. The results show that Fe3+ accelerated BDE-47 degradation at lower concentrations (<0.5 mM) but attenuated it at higher concentrations (0.5-5 mM) and that Brij35 loss was increased with increasing Fe3+. These results likely are caused by changes in the rate of •OH production due to the ferric ion, association of Fe3+ and electron transfer from Brij35, and light attenuation at high concentration. The BDE-47 and Brij35 had different degradation rates at different pH values and at different dissolved oxygen concentrations. The BDE-47 products were identified by gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS). The results indicated that BDE-47 transformed into mainly lower-brominated products, a few bromodibenzofurans, some rearrangement products, and some hydroxylated polybrominated diphenyl ethers. A series of Brij35 oxidization products were detected by ultra-performance liquid chromatography-high resolution mass spectrometry (UPLC-HRMS), including hydroxylation products, carboxylation products, and some hydrophilic chain-breaking products. Brij35 was mainly oxidized by Fe3+ and/or reactive oxygen species (ROS) with the final products of CO2 and H2O. The iron ions apparently cycled from ferric to ferrous ions in the micelles such that the Fe3+-Brij35 complex dominated the main redox reaction, leading to both BDE-47 and Brij35 degradation. It appears that in any applied soil washing system, the ferric ions in the washing waste need to be removed because of the adverse effects on BDE-47 removal and eluate reuse.
Collapse
Affiliation(s)
- Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; Lyles School of Civil Engineering, and Division of Environmental and Ecological Engineering, Purdue University, West Lafayette 47960, USA
| | - Jiahao Liang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Chad T Jafvert
- Lyles School of Civil Engineering, and Division of Environmental and Ecological Engineering, Purdue University, West Lafayette 47960, USA
| | - Qiuyue Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Sishuo Chen
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Xueqin Tao
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Mengyao Zou
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China.
| |
Collapse
|
20
|
Wei X, Guo Z, Yin H, Yuan Y, Chen R, Lu G, Dang Z. Removal of heavy metal ions and polybrominated biphenyl ethers by sulfurized nanoscale zerovalent iron: Compound effects and removal mechanism. JOURNAL OF HAZARDOUS MATERIALS 2021; 414:125555. [PMID: 33684814 DOI: 10.1016/j.jhazmat.2021.125555] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/22/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Sulfurized nanoscale zerovalent iron (S-nZVI) has been widely reported to be able to quickly remove heavy metals/persistent organic pollutants, but the limited understanding of the complicated removal process of heavy metals-organic combined pollutants restricts the application of S-nZVI. Here, we demonstrate that there is significant difference in the effectiveness of S-nZVI for removing single pollutant and complex pollutants. The removal kinetic constant (kobs) of heavy metals by S-nZVI followed a sequence of Cr(VI)>Pb(II)>Ni(II)>Cd(II) with or without polybrominated diphenyl ethers (PBDEs). While the capacity of co-existing cations increasing the kobs of PBDEs followed the order: Ni(II)>Pb(II)>Cd(II), and the co-existence of Cr(VI) anion inhibited the reduction of PBDE by S-nZVI because the generated Cr-Fe precipitate hindered the electron transfer. The de-passivation process on S-nZVI surface by Cd(II) ions slightly accelerated the transformation rate of electron. Nevertheless, the co-existing Pb(II) significantly accelerated the transformation of BDE-209 via the galvanic effect from the generated Pb0/Fe0 bimetal. Interestingly, the kobs of BDE-47 in Ni(II)/S-nZVI system was 5.51 times higher than that of Pb(II)/S-nZVI system, implying that an atomic hydrogen mechanism dominated the reduction of BDE-47 by Ni(II)/S-nZVI. In conclusion, the results provided a deep comprehending of removal mechanism of heavy metal-organic complex pollutants by S-nZVI.
Collapse
Affiliation(s)
- Xipeng Wei
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China
| | - Zhanyu Guo
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China
| | - Hua Yin
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China.
| | - Yibo Yuan
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China
| | - Ruxia Chen
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China
| | - Guining Lu
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China
| | - Zhi Dang
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China
| |
Collapse
|
21
|
The Influence of Copper on Halogenation/Dehalogenation Reactions of Aromatic Compounds and Its Role in the Destruction of Polyhalogenated Aromatic Contaminants. Catalysts 2021. [DOI: 10.3390/catal11030378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The effect of copper and its compounds on halogenation and dehalogenation of aromatic compounds will be discussed in the proposed article. Cu oxidized to appropriate halides is an effective halogenation catalyst not only for the synthesis of halogenated benzenes or their derivatives as desired organic fine chemicals, but is also an effective catalyst for the undesirable formation of thermodynamically stable and very toxic polychlorinated and polybrominated aromatic compounds such as polychlorinated biphenyls, dibenzo-p-dioxins and dibenzofurans accompanied incineration of waste contaminated with halogenated compounds or even inorganic halides. With appropriate change in reaction conditions, copper and its alloys or oxides are also able to effectively catalyze dehalogenation reactions, as will be presented in this review.
Collapse
|
22
|
Yao B, Luo Z, Zhi D, Hou D, Luo L, Du S, Zhou Y. Current progress in degradation and removal methods of polybrominated diphenyl ethers from water and soil: A review. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123674. [PMID: 33264876 DOI: 10.1016/j.jhazmat.2020.123674] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/04/2020] [Accepted: 08/06/2020] [Indexed: 06/12/2023]
Abstract
The widespread of polybrominated diphenyl ethers (PBDEs) in the environment has caused rising concerns, and it is an urgent endeavor to find a proper way for PBDEs remediation. Various techniques such as adsorption, hydrothermal and thermal treatment, photolysis, photocatalytic degradation, reductive debromination, advanced oxidation processes (AOPs) and biological degradation have been developed for PBDEs decontamination. A comprehensive review of different PBDEs remediation techniques is urgently needed. This work focused on the environmental source and occurrence of PBDEs, their removal and degradation methods from water and soil, and prospects for PBDEs remediation techniques. According to the up-to-date literature obtained from Web of Science, it could be concluded that (i) photocatalysis and photocatalytic degradation is the most widely reported method for PBDEs remediation, (ii) BDE-47 and BDE-209 are the most investigated PBDE congeners, (iii) considering the recalcitrance nature of PBDEs and more toxic intermediates could be generated because of incomplete degradation, the combination of different techniques is the most potential solution for PBDEs removal, (iv) further researches about the development of novel and effective PBDEs remediation techniques are still needed. This review provides the latest knowledge on PBDEs remediation techniques, as well as future research needs according to the up-to-date literature.
Collapse
Affiliation(s)
- Bin Yao
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Zirui Luo
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Dan Zhi
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Dongmei Hou
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Lin Luo
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Shizhi Du
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
| | - Yaoyu Zhou
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China.
| |
Collapse
|
23
|
Lian P, Qin A, Liao L, Zhang K. Progress on the nanoscale spherical TiO
2
photocatalysts: Mechanisms, synthesis and degradation applications. NANO SELECT 2020. [DOI: 10.1002/nano.202000091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Peng Lian
- Key Lab New Processing Technology for Nonferrous Metals & Materials Ministry of Education College of Materials Science and Engineering Guilin University of Technology Guilin P. R. China
| | - Aimiao Qin
- Key Lab New Processing Technology for Nonferrous Metals & Materials Ministry of Education College of Materials Science and Engineering Guilin University of Technology Guilin P. R. China
| | - Lei Liao
- College of Environmental Science and Engineering Guilin University of Technology Guilin P. R. China
| | - Kaiyou Zhang
- Key Lab New Processing Technology for Nonferrous Metals & Materials Ministry of Education College of Materials Science and Engineering Guilin University of Technology Guilin P. R. China
| |
Collapse
|
24
|
Peng Z, Shi M, Xia K, Dong Y, Shi L. Degradation of 2, 2', 4, 4'-Tetrabrominated diphenyl ether (BDE-47) via the Fenton reaction driven by the dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:115413. [PMID: 32828026 DOI: 10.1016/j.envpol.2020.115413] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 08/02/2020] [Accepted: 08/08/2020] [Indexed: 06/11/2023]
Abstract
A microbially facilitated approach was developed to degrade 2, 2', 4, 4'-tetrabrominated diphenyl ether (BDE-47). This approach consisted of biological production of Fe(II) and H2O2 by the dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1 during the repetitive anoxic/oxic cycles and abiotic production of hydroxyl radical (HO●) with the biologically produced Fe(II) and H2O2 via Fenton reaction. Under the condition tested, BDE-47 did not inhibit the growth of S. oneidensis MR-1. Water soluble Fe(III)-citrate and the solid minerals ferrihydrite [Fe(III)2O3•0.5H2O] and goethite [Fe(III)OOH] were tested in this study. Under anoxic condition, the amounts of Fe(II) produced by S. oneidensis MR-1 varied among the Fe(III)s tested, which decreased in the order of Fe(III)-citrate > ferrihydrite > goethite. Under subsequent oxic condition, H2O2 was produced via O2 reduction by S. oneidensis MR-1. The amounts of H2O2 detected also varied, which decreased in the order of the reactions with Fe(III)-citrate > goethite > ferrihydrite. S. oneidensis MR-1 maintained its ability to produce Fe(II) and H2O2 for up to seven anoxic/oxic cycles. At each end of anoxic/oxic cycle, HO● was detected. The amount of HO● produced decreased in the order of the reactions with ferrihydrite > goethite > Fe(III)-citrate, which was opposite to that of H2O2 detected. Compared to the controls without HO●, the amounts of BDE-47 in the reactions with HO● decreased. The more HO● in the reaction, the less amount of BDE-47 detected. Furthermore, no BDE-47 degradation was observed when HO● was scavenged or ferrihydrite was either omitted or replaced by nitrate. Finally, identification of degradation products, such as hydroxylated BDE-47 and trisBDE, dibromophenol and monobromophenol, suggested that OH-addition and Br-substitution by HO● were the main mechanisms for degrading BDE-47. Collectively, all these results demonstrated for the first time that the Fenton reaction driven by S. oneidensis MR-1 degraded BDE-47 effectively.
Collapse
Affiliation(s)
- Zhaofeng Peng
- Department of Biological Sciences and Technology, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Meimei Shi
- Department of Biological Sciences and Technology, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Kemin Xia
- Department of Biological Sciences and Technology, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Yiran Dong
- Department of Biological Sciences and Technology, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Liang Shi
- Department of Biological Sciences and Technology, School of Environmental Studies, China University of Geosciences, Wuhan, Hubei, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei, 430074, China.
| |
Collapse
|
25
|
Wu N, Qu R, Li C, Bin-Jumah M, Allam AA, Cao W, Yu Y, Sun C, Wang Z. Enhanced oxidative degradation of decabromodiphenyl ether in soil by coupling Fenton-persulfate processes: Insights into degradation products and reaction mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 737:139777. [PMID: 32531511 DOI: 10.1016/j.scitotenv.2020.139777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/26/2020] [Accepted: 05/26/2020] [Indexed: 06/11/2023]
Abstract
Decabromodiphenyl ether (BDE-209) has extreme hydrophobicity, which results in its significant accumulation in soil, sediments and other solid materials. In this work, an oxidation method coupling Fenton with persulfate (PS) was proposed for the effective degradation of BDE-209 adsorbed on solid surfaces. After adding 0.1 M PS to the Fenton system at 1.0 h, the removal rate of BDE-209 was significantly increased from 62.2% to 94.0%. The degradation of BDE-209 in various soil samples was also investigated by the coupling Fenton-PS method. Removal efficiency of 73.4-95.8% was obtained, suggesting that this coupling method was feasible in real application. According to the radical scavenging experiments, •OH dominated the overall reaction of BDE-209 in the coupling system. Meanwhile, the enhanced removal was attributed to the generation of SO4•- from the catalytic decomposition of PS. The calculated energy barriers for SO4•- attacking on the carbons were smaller than •OH initiated reactions, which further confirmed that SO4•- plays a role in the accelerated removal of BDE-209. The initial attack of BDE-209 by SO4•- generated the SO4•- adducts, which may undergo debromination or CO bond cleavage reaction together with subsequent hydroxyl substitution to form the primary product OH-Nona-BDEs and pentabromophenol. Under the successive attack of radicals, these primary products were further transformed into lower-brominated hydroxylation products and bromophenols via direct debromination and hydroxyl substitution reaction. This work provides an economical and effective method for treating BDE-209 contaminated soils and samples.
Collapse
Affiliation(s)
- Nannan Wu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China.
| | - Ruijuan Qu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China.
| | - Chenguang Li
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| | - May Bin-Jumah
- Biology Department, Faculty of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ahmed A Allam
- Department of Zoology, Faculty of Science, Beni-suef University, Beni-suef 65211, Egypt
| | - Wanming Cao
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| | - Yao Yu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| | - Cheng Sun
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing 210023, PR China
| |
Collapse
|
26
|
Huang K, Liu H, He J, Li Y, Wang R, Tang T, Tao X, Yin H, Dang Z, Lu G. Photoassisted degradation of 2,2',4,4'-tetrabrominated diphenyl ether in simulated soil washing system containing Triton X series surfactants. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:115005. [PMID: 32554085 DOI: 10.1016/j.envpol.2020.115005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 05/23/2020] [Accepted: 06/07/2020] [Indexed: 06/11/2023]
Abstract
This study aims to use ultraviolet (UV) irradiation to decompose polybrominated diphenyl ethers (PBDEs) in the elutes and then reuse the surfactants. The results indicate that UV can remove 2,2',4,4'-tetrabrominated diphenyl ether (BDE-47) from surfactant eluents and Triton X series surfactants also can remove BDE-47 from the soil. Triton X-100 (TX-100) is the most promising surfactant during the washing and photodegradation processes. Quench experiments suggest that both 1O2 and OH• were involved in the TX-100 decomposition but only 1O2 is responsible for the degradation of BDE-47. In analysis of the photoproducts of BDE-47 by Gas Chromatography Mass Spectrum (GC-MS) and Liquid Chromatography High Resolution Mass Spectrometry (LC-HRMS), BDE-47 was mainly debrominated to the lower-brominated BDEs and then oxidized to ring-opening products. The little loss of TX-100 can mainly be attributed to the breakage of polyethylene oxide (PEO) chain. Nevertheless, the washing wastes treated by UV light can exhibit higher solubility for BDE-47 than before, indicating they can be reused for BDE-47 removal from soil. The toxicity assessment experiments were performed using Escherichia coli (E.coli) as an indicator. The results indicate that the removal of BDE-47 by UV irradiation can reduce the toxicity of eluent.
Collapse
Affiliation(s)
- Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - He Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Jinglei He
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Yan Li
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Rui Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Ting Tang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Xueqin Tao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| |
Collapse
|
27
|
Chen K, Wang X, Xia P, Xie J, Wang J, Li X, Tang Y, Li L. Efficient removal of 2,2',4,4'-tetrabromodiphenyl ether with a Z-scheme Cu 2O-(rGO-TiO 2) photocatalyst under sunlight irradiation. CHEMOSPHERE 2020; 254:126806. [PMID: 32339793 DOI: 10.1016/j.chemosphere.2020.126806] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/01/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
Z-scheme Cu2O-(rGO-TiO2) photocatalyst was successfully synthesized via a simple three-step approach for 2,2',4,4'-tretrabromodiphenyl ether (BDE47) reductive removal under simulated solar irradiation. Unlike the traditional heterojunction, the addition of reduced graphene oxide (rGO) enhanced the redox ability of Cu2O-TiO2 by increasing charge transfer. When modifying Cu2O films by adding 1% rGO and coating with 70% TiO2, the resulting Cu2O-(rGO-TiO2) exhibited the best photocatalytic activity for BDE47 removal. The charge transfers of Cu2O-(rGO-TiO2) were proven to follow a Z-scheme pathway through the electron paramagnetic resonance analysis. The degradation pathways of BDE47 were elucidated by identifying intermediate products via gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC). Photo-electrons (e-) generated from the conduction band of Cu2O and hydrogen protons (H0) reduced from H+ in water were the main contributing elements for the removal of BDE47, which response to the ortho and para debromination. Ortho-Br of BDE47 was attacked by e- and BDE28 was the dominant debromination product on the first stage. Then e- and H0 attacked ortho-Br and para-Br of BDE28 to form BDE15 and BDE8, respectively. The concentration of BDE8 was higher than that of BDE15, suggesting that H0 played the most important role on the second debromination stage. An effective Cu2O-(rGO-TiO2)-based Z-scheme system for BDE47 debromination was proposed in this study, which may contribute to the development of novel green technologies.
Collapse
Affiliation(s)
- Kexin Chen
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Xi Wang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China.
| | - Pengfei Xia
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China
| | - Jinxin Xie
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Jing Wang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Xukai Li
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Yiming Tang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Laisheng Li
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Higher Education Mega Center, Guangzhou, 510006, China; School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China; Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China.
| |
Collapse
|
28
|
Huang K, Liang J, Wang J, Ouyang Y, Wang R, Tang T, Luo Y, Tao X, Yin H, Dang Z, Lu G. Effect of nitrate on the phototreatment of Triton X-100 simulated washing waste containing 4,4'-dibromodiphenyl ether: Kinetics, products and toxicity assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 732:139247. [PMID: 32438183 DOI: 10.1016/j.scitotenv.2020.139247] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/12/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
This study aimed to investigate the effects of nitrate on the ultraviolet (UV) treatment of simulated washing wastes containing Trion X-100 (TX-100) surfactant and 4,4'-dibromodiphenyl ether (BDE-15) pollutant. The presence of nitrate accelerated the photodegradation of BDE-15 and TX-100, because they reacted with reactive oxygen species (ROS) produced from conversion between nitrate and nitrite. Due to nitrite having a stronger radical quenching property than nitrate, nitrite hindered TX-100 decay while the photodegradation rate of BDE-15 was similar to that in the presence of nitrate. This indicated that nitrate/nitrite affected BDE-15 photodegradation by photosensitization and TX-100 loss by ROS attack. An increased TX-100 concentration increased the loss of total inorganic nitrogen possibly owing to an increase in organic nitrogen formation through TX-100 nitration reactions. At pH < 7 HOONO rapidly isomerized to NO3-, and at pH = 7-9 it homolyzed to ONOO-, which increased OH production to decay the BDE-15 and TX-100 and also increased NO2- formation. BDE-15 mainly underwent debromination, and some rearrangement, ring formation, nitration and hydroxylation products were detected, indicating that the produced OH and NO2 attacked the BDE-15 and products. Furthermore, broken-chain, carboxylation, hydroxylation and nitro products were detected by Liquid chromatography high resolution mass spectrometry (LC-HRMS). Escherichia coli was used to assess the toxicity of washing waste containing nitrate: the presence of nitrate will increase the wastes' toxicity during UV treatment. Therefore, the presence of nitrate is deleterious to the UV treatment of washing wastes, and it is important to remove nitrates and nitrites from washing waste before UV irradiation.
Collapse
Affiliation(s)
- Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jiahao Liang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jin Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yuanxi Ouyang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Rui Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Ting Tang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Yusen Luo
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Xueqin Tao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
| |
Collapse
|
29
|
Long Z, Li Q, Wei T, Zhang G, Ren Z. Historical development and prospects of photocatalysts for pollutant removal in water. JOURNAL OF HAZARDOUS MATERIALS 2020; 395:122599. [PMID: 32302881 DOI: 10.1016/j.jhazmat.2020.122599] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 05/21/2023]
Abstract
Photocatalysis, as a low-cost and environment friendly technology, has demonstrated a significant potential for water pollution purification; it has received extensive attention in recent decades. The key is the photocatalyst; a large number of photocatalysts have been developed. To better understand and further develop the photocatalysis technology for water treatment, this review summarizes its development over time. The development period is divided into four stages (1960s-1993, 1994-2000, 2001-2010, and 2011-present) to provide readers with a better understanding of the development characteristics, and causes and consequences of each historical stage. This review expounds the origin and development of photocatalysis and the obstacles encountered and overcome. It describes the development of mechanisms and methods to solve these problems in each time period. Moreover, it reviews the recent development of new photocatalysts, the concept of designing photocatalysts, and photocatalytic-coupling systems. Finally, it enumerates the problems that continue to exist in the application of photocatalysis technology, and highlights the key issues that must be addressed in future research. The review is aimed at providing the researchers with a deeper understanding of photocatalysis technology and encourage further development of the application of photocatalysis to water treatment.
Collapse
Affiliation(s)
- Zeqing Long
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China; School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Qiangang Li
- School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Ting Wei
- School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China; School of Environment & Natural Resources, Renmin University of China, Beijing, 100872, China.
| | - Zhijun Ren
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China.
| |
Collapse
|
30
|
Xu Y, Liang C, Zhang T, Tao X, Wang R, Huang K, Pan Z, Dang Z, Yin H, Lu G. Debromination of polybrominated diphenyl ethers (PBDEs) by palladized zerovalent zinc particles: Influence factors, pathways and mechanism. CHEMOSPHERE 2020; 253:126726. [PMID: 32302906 DOI: 10.1016/j.chemosphere.2020.126726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 02/26/2020] [Accepted: 04/05/2020] [Indexed: 06/11/2023]
Abstract
We synthesized a novel material, namely palladized zero-valent zinc (Pd/ZVZ), and investigated its efficiency for the degradation of polybrominated diphenyl ethers (PBDEs). The plated Pd significantly enhances the degradation rate of PBDEs by ZVZ at the optimum loading of 1% by weight. In the Pd/ZVZ system, very few lower BDEs were accumulated during the degradation of 2,2',4,4'- tetrabromodiphenyl ether (BDE-47) and the final product is diphenyl ether, whereas the ZVZ system only debrominates BDE-47 to di-BDE and further debromination becomes very difficult. The degradation rates of BDEs by ZVZ greatly decreased with decreased bromination level, while in Pd/ZVZ system, the degradation rates of PBDEs did not show a significant difference. These indicate different mechanisms. This was confirmed by investigating the debromination pathways of the PBDEs in both systems. We determined that a H-transfer was the dominant mechanism in the Pd/ZVZ system. In addition, the reactivity of Pd/ZVZ to BDE-47 is pH-independent, which has a great advantage for various applications over ZVZ alone. Our study provides a new approach for the remediation of the PBDEs pollution.
Collapse
Affiliation(s)
- Yongye Xu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Chenghao Liang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Taiping Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China.
| | - Xueqin Tao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Rui Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Zhaoxi Pan
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China.
| |
Collapse
|
31
|
Wei L, Zhou B, Xiao K, Yang B, Yu G, Li J, Zhu C, Zhang J, Duan H. Highly efficient degradation of 2,2',4,4'-tetrabromodiphenyl ether through combining surfactant-assisted Zn 0 reduction with subsequent Fenton oxidation. JOURNAL OF HAZARDOUS MATERIALS 2020; 385:121551. [PMID: 31708290 DOI: 10.1016/j.jhazmat.2019.121551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/13/2019] [Accepted: 10/24/2019] [Indexed: 06/10/2023]
Abstract
2,2',4,4'-tetrabromodiphenyl ether (BDE47) was difficult to be rapidly degraded by common reductive debromination or oxidative decomposition. In this study, the debromination via surfactant-assisted zero valent zinc (Zn0) reduction and subsequent Fenton oxidation was combined to completely degrade BDE47. Firstly, Zn0 integrated with surfactants including cetyltrimethylammonium chloride (CTAC), polyethylene glycol dodecyl ether (Brij35), or 1-dodecanesulfonic acid sodium salt (SDS) were evaluated for their reactivity to debrominate BDE47. CTAC-assisted Zn0 system presented the highest removal efficiency of 98.6% for BDE47 (C0 = 5 mg/L) under the optimized conditions including 0.3 g/L of Zn0 particles and 0.05 g/L of CTAC at 25 °C and pH 4.0 during 1-h reaction. Subsequently, the debromination products as low-brominated BDEs were attacked by hydroxyl radicals (•OH) from Fenton reagent, which were decomposed into short-chain carboxylic acids and even mineralized within 2-h oxidation. In addition, HPLC, GC-MS, LC-MS/MS, and IC were employed to detect intermediates during this reaction/oxidation process and the pathways of debromination and oxidation were proposed according to carbon and bromine balance. The above combination achieved the complete degradation of BDE47 via a relative low-cost method to rapidly remove PBDEs, which provide a new approach for the effective treatment of halogenated organic pollutants.
Collapse
Affiliation(s)
- Liyan Wei
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Biao Zhou
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Ke Xiao
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Bo Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China.
| | - Gang Yu
- School of Environment, POPs Research Center, Tsinghua University, Beijing 100084, PR China
| | - Juying Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Caizhen Zhu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Junmin Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Huabo Duan
- Smart City Research Institute, College of Civil Engineering, Shenzhen University, Shenzhen 518060, PR China
| |
Collapse
|
32
|
Liu S, Cheng G, Xiong Y, Ding Y, Luo X. Adsorption of low concentrations of bromide ions from water by cellulose-based beads modified with TEMPO-mediated oxidation and Fe(III) complexation. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121195. [PMID: 31585281 DOI: 10.1016/j.jhazmat.2019.121195] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 08/30/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
Due to strong activity, it is very difficult to remove low concentrations of bromide in medical wastewater by traditional method, thus highly effective and greener adsorbents should be utilized to design. In this work, the cellulose beads (CBs) were modified by the TEMPO-mediated oxidation and then bonded with Fe3+ to fabricate Fe(III)-complexed carboxylated cellulose beads (Fe-CCBs) adsorbents. Structure and properties of Fe-CCBs were analyzed using Energy dispersive spectrum (EDS), Scanning electron microscopy (SEM), Fourier transform infrared spectrum (FT-IR), total acidity and basicity groups, X-ray diffraction (XRD), N2 adsorption-desorption and Thermogravimetric (TGA). Moreover, batch adsorption experiments showed that the adsorption of Br- was better consistent with general-order kinetic model and Liu isotherm model, which could also further clarify the adsorption process mechanism. Meanwhile, the results revealed that removal of Br- was a spontaneous exothermic process and was more suitable to be carried out under neutral or acidic conditions. Furthermore, the mechanism of adsorption behavior of bromide ions on Fe-CCBs was based on a combination of electrostatic attraction and outer-sphere complexation. The results of this study can provide guidance for the design of novel material adsorbents and the removal of harmful anions from aqueous solutions.
Collapse
Affiliation(s)
- Shengpeng Liu
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, PR China
| | - Gen Cheng
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, PR China
| | - Yun Xiong
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, PR China
| | - Yigang Ding
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, PR China
| | - Xiaogang Luo
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, PR China; School of Materials Science and Engineering, Zhengzhou University, No.100 Science Avenue, Zhengzhou City, 450001, Henan Province, PR China.
| |
Collapse
|
33
|
Li H, Huang G, Wang M. Enhanced solubilization and reductive degradation of 2,2',4,4'- tretrabromodiphenyl ether by PAC-Pd/Fe nanoparticles in the presence of surfactant. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:5085-5096. [PMID: 31848954 DOI: 10.1007/s11356-019-06627-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
2,2',4,4'-Tretrabromodiphenyl ether (BDE47) is known as a typical polybrominated diphenyl ethers (PBDEs) due to its high environmental abundance, ecological toxicity, and bioaccumulation. In this study, the influences of three typical surfactants (CTAB, SDS, and TX-100) on BDE47 solubilization and degradation by the polyanionic cellulose-stabilized Pd/Fe (PAC-Pd/Fe) nanoparticles were investigated. The results showed that BDE47 solubilities increased linearly when surfactant concentrations were above their critical micelle concentrations (CMCs), and the solubilization capacities of surfactants for BDE47 followed the order of TX-100 > CTAB > SDS. The appropriate dosages of surfactants were favorable for BDE47 degradation due to enhancing solubilization and accelerating mass transfer, while excessive surfactants inhibited BDE47 degradation due to excessive and thicker micelles formed, but still higher than no surfactant. The influences of various factors (PAC-Pd/Fe nanoparticle dosage, solution pH, and temperature) on BDE47 degradation in TX-100 solution were also tested. The results showed that BDE47 degradation followed the pseudo first-order kinetics model. The degradation rates of BDE47 increased as PAC-Pd/Fe nanoparticle dosage and temperature increased. Weak acidic condition (pH 5.5) was favorable for BDE47 degradation with 96.8% BDE47 was removed within 7.5 min, while alkaline condition (9.0) was not conducive to the degradation of BDE47. The degradation of BDE47 by PAC-Pd/Fe nanoparticles was a catalytic reductive debromination process via active H-species attack, wherein the sequential debromination was the dominant reaction. This study suggests that in the presence of moderate surfactant, PAC-Pd/Fe nanoparticles may be potentially employed to eliminate BDE47 in contaminated water.
Collapse
Affiliation(s)
- Haijie Li
- School of Environment Science, Nanjing Xiaozhuang University, Nangjing, 211171, People's Republic of China
| | - Guofu Huang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, 262700, Weifang, People's Republic of China.
| | - Mianmian Wang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, 262700, Weifang, People's Republic of China
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, People's Republic of China
| |
Collapse
|
34
|
An unusual dependency on the hole-scavengers in photocatalytic reductions mediated by a titanium-based metal-organic framework. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.11.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
35
|
Li Y, Wang G, Wang J, Jia Z, Zhou Y, Wang C, Li Y, Zhou S. Determination of influencing factors on historical concentration variations of PAHs in West Taihu Lake, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:573-580. [PMID: 30933754 DOI: 10.1016/j.envpol.2019.03.055] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/28/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The adsorption of polycyclic aromatic hydrocarbons (PAHs) by components such as elemental carbon (EC), total organic carbon (TOC), and particles is different, and EC and PAHs are good materials for reconstructing historical human activity patterns and pollution conditions. In this study, the effects of EC (soot and char), TOC and particles of different grain size on PAHs in surface sediments were quantitatively analysed, and their historical concentrations in a sediment core from western Taihu Lake were reconstructed. The contents of soot, TOC, clay, EC and char explained 57.2%, 27.6%, 26.0%, 24.0% and 16.4%, respectively, of the PAH concentrations in surface sediments. The correlation between the soot and PAH levels was significantly higher than that between the char, TOC, and clay contents and PAH levels, and PAHs were mainly affected by the local economic development and human activity, as indicated by metrics of population, highway mileage, coal burning, and industrial output. With the development of the economy of the Taihu Lake Basin, the composition of PAHs in the sediments has changed: the proportion of low-molecular-weight PAHs decreased from 42.4% to 17.5%, and that of high-molecular-weight PAHs increased from 58.7% to 82.5%. The concentration of PAHs in pore water from Taihu Lake over the past 100 years was reconstructed and ranged from 43.1 to 961.2 μg L-1, with an average of 180.7 μg L-1. After China's reform and opening up, the concentrations of various PAHs in Taihu Lake changed from safe to chronic pollution levels. The ratios of lead (Pb) isotopes and the diagnostic ratios of PAHs showed that the main sources of PAHs in western Taihu Lake sediments were human activities such as coal and petroleum combustion.
Collapse
Affiliation(s)
- Yan Li
- College of Forestry, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, Jiangsu, China; School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, 210023, Jiangsu, China
| | - Genmei Wang
- College of Forestry, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, Jiangsu, China.
| | - Junxiao Wang
- School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, 210023, Jiangsu, China
| | - Zhenyi Jia
- School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, 210023, Jiangsu, China
| | - Yujie Zhou
- School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, 210023, Jiangsu, China
| | - Chunhui Wang
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, 1158 Baiyang Street, Hangzhou, 310018, Zhejiang, China
| | - Yanyan Li
- College of Forestry, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, Jiangsu, China
| | - Shenglu Zhou
- School of Geography and Ocean Science, Nanjing University, 163 Xianlin Road, Nanjing, 210023, Jiangsu, China.
| |
Collapse
|
36
|
Guo S, Zhu L, Majima T, Lei M, Tang H. Reductive Debromination of Polybrominated Diphenyl Ethers: Dependence on Br Number of the Br-Rich Phenyl Ring. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4433-4439. [PMID: 30912444 DOI: 10.1021/acs.est.8b07050] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reductive debromination has been widely studied for the degradation of polybrominated diphenyl ethers (PBDEs), although the reaction mechanisms are not so clear. In the present study, the photocatalytic degradation and debromination of ten PBDEs were carried out with CuO/TiO2 nanocomposites as the photocatalyst under an anaerobic condition. The pseudo-first-order rate constants were obtained for the photocatalytic debromination of PBDEs, and their relative rate constants ( kR) were evaluated against kR= 1 for BDE209. Unlike the generally accepted summary that kR is dependent on the total Br number ( N) of PBDEs, kR is found to depend on the Br number on a phenyl ring with more Br atoms than the other one. In other words, a phenyl ring substituted by more Br is more reactive for the reductive debromination. The calculated LUMO energies ( ELUMO) of all PBDEs are well correlated to the more reactive phenyl ring with more Br, compared with the N of two phenyl rings. The result was explained by LUMO localization on the Br-rich phenyl ring, suggesting that the reductive debromination occurs on the phenyl ring.
Collapse
Affiliation(s)
- Shun Guo
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430074 , PR China
| | - Lihua Zhu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430074 , PR China
| | - Tetsuro Majima
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430074 , PR China
| | - Ming Lei
- College of Resources and Environmental Science , South-Central University for Nationalities , Wuhan 430074 , PR China
| | - Heqing Tang
- College of Resources and Environmental Science , South-Central University for Nationalities , Wuhan 430074 , PR China
| |
Collapse
|
37
|
Wang X, Hu Z, Chen K, Dong H, Li S, Li X, Li L. Efficient photocatalytic debromination of 2,2',4,4'-tetrabromodiphenyl ether by Ag-loaded CdS particles under visible light. CHEMOSPHERE 2019; 220:723-730. [PMID: 30611070 DOI: 10.1016/j.chemosphere.2018.12.089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 11/20/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
Highly active and visible light-driven Ag-loaded CdS photocatalysts were prepared via a hydrothermal synthesis and photodeposition method. The removal and debromination of 2,2',4,4'-tetrabromodiphenyl ether was achieved efficiently using this Ag-loaded CdS under visible light, with a removal efficiency of 100% and a debromination ratio of 44.3% being achieved within 30 min. Both the reaction solvent and the water content were found to have a strong influence on the removal efficiency and the debromination ratio. In addition, the stepwise debromination preference was ortho ≫ para, thereby indicating that the main debromination pathway was electron reduction. The stability and efficiency of these Ag-loaded CdS photocatalysts for the removal of BDE47 were satisfactory, and so our results confirmed the development of a promising visible light-driven catalyst for the removal of polybrominated diphenyl ethers.
Collapse
Affiliation(s)
- Xi Wang
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China.
| | - Zhe Hu
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China
| | - Kexin Chen
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China
| | - Haitai Dong
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China
| | - Shangyi Li
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China
| | - Xukai Li
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China
| | - Laisheng Li
- Guangdong Provincial Engineering Research Center for Drinking Water Safety, Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China.
| |
Collapse
|
38
|
Transformation Products of Organic Contaminants and Residues-Overview of Current Simulation Methods. Molecules 2019; 24:molecules24040753. [PMID: 30791496 PMCID: PMC6413221 DOI: 10.3390/molecules24040753] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/14/2019] [Accepted: 02/16/2019] [Indexed: 01/27/2023] Open
Abstract
The formation of transformation products (TPs) from contaminants and residues is becoming an increasing focus of scientific community. All organic compounds can form different TPs, thus demonstrating the complexity and interdisciplinarity of this topic. The properties of TPs could stand in relation to the unchanged substance or be more harmful and persistent. To get important information about the generated TPs, methods are needed to simulate natural and manmade transformation processes. Current tools are based on metabolism studies, photochemical methods, electrochemical methods, and Fenton’s reagent. Finally, most transformation processes are based on redox reactions. This review aims to compare these methods for structurally different compounds. The groups of pesticides, pharmaceuticals, brominated flame retardants, and mycotoxins were selected as important residues/contaminants relating to their worldwide occurrence and impact to health, food, and environmental safety issues. Thus, there is an increasing need for investigation of transformation processes and identification of TPs by fast and reliable methods.
Collapse
|
39
|
Koch C, Nachev M, Klein J, Köster D, Schmitz OJ, Schmidt TC, Sures B. Degradation of the Polymeric Brominated Flame Retardant "Polymeric FR" by Heat and UV Exposure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:1453-1462. [PMID: 30623663 DOI: 10.1021/acs.est.8b03872] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Monomeric brominated flame retardants often pose risks to the environment. The new group of polymeric flame retardants is claimed to be a safer alternative due to their high molecular weight and persistence by design. Within this publication, the degradation of a commercially widely applied example of this group-the polymer "Polymeric FR"-was studied during UV irradiation and long-term exposure to heat (60 °C) for up to 36 weeks. Both treatments led to a variety of degradation products, which might have potentially adverse environmental effects and an increased mobility compared to the mother polymer. Besides identifying some of the possible degradation products (including for instance 2,4,6-tribromo-3-hydroxybenzoic acid), the degradation via UV irradiation, which yields 75 different degradation products, and via heat, which led to significantly less products, was compared. In addition, further parameters like TOC and the concentration of free bromine were studied and it was demonstrated that the used type of water (distilled, reconstituted, and rainwater) does not influence the outcome of the degradation experiments.
Collapse
Affiliation(s)
- Christoph Koch
- Aquatic Ecology , University Duisburg-Essen , 45141 Essen , Germany
- Centre for Water and Environmental Research (ZWU) , University Duisburg-Essen , 45141 Essen , Germany
- Deutsche Rockwool GmbH & Co . KG, 45966 Gladbeck , Germany
| | - Milen Nachev
- Aquatic Ecology , University Duisburg-Essen , 45141 Essen , Germany
- Centre for Water and Environmental Research (ZWU) , University Duisburg-Essen , 45141 Essen , Germany
| | - Julia Klein
- Centre for Water and Environmental Research (ZWU) , University Duisburg-Essen , 45141 Essen , Germany
- Applied Analytical Chemistry , University Duisburg-Essen , 45141 Essen , Germany
| | - Daniel Köster
- Instrumental Analytical Chemistry , University Duisburg-Essen , 45141 Essen , Germany
| | - Oliver J Schmitz
- Centre for Water and Environmental Research (ZWU) , University Duisburg-Essen , 45141 Essen , Germany
- Applied Analytical Chemistry , University Duisburg-Essen , 45141 Essen , Germany
| | - Torsten C Schmidt
- Centre for Water and Environmental Research (ZWU) , University Duisburg-Essen , 45141 Essen , Germany
- Instrumental Analytical Chemistry , University Duisburg-Essen , 45141 Essen , Germany
| | - Bernd Sures
- Aquatic Ecology , University Duisburg-Essen , 45141 Essen , Germany
- Centre for Water and Environmental Research (ZWU) , University Duisburg-Essen , 45141 Essen , Germany
| |
Collapse
|
40
|
Wu Z, Han W, Xie M, Han M, Li Y, Wang Y. Occurrence and distribution of polybrominated diphenyl ethers in soils from an e-waste recycling area in northern China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 167:467-475. [PMID: 30368140 DOI: 10.1016/j.ecoenv.2018.10.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 10/07/2018] [Accepted: 10/09/2018] [Indexed: 06/08/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are widespread persistent organic pollutants (POPs) because of their extensive use in diverse electronic products, which have posed great threats to human health and ecosystem. In this study, a total of 54 soil samples were collected from an e-waste recycling area in Tianjin, northern China for analyzing the occurrence and distribution of 14 PBDE congeners. The concentrations of BDE 209, ∑13PBDEs and ∑14PBDEs in the soils from Ziya e-waste recycling area were 2.9-2666 ng/g dw (dry weight) (average 90 ng/g dw), 3.0-41 ng/g dw (average 13 ng/g dw) and 5.9-2699 ng/g dw (average 103 ng/g dw), respectively. The ∑14PBDEs concentration showed a dramatic decrease from the central area to the surrounding area. Generally, PBDEs in the northern part showed higher levels than the southern part of the e-waste recycling area due to the wind direction in Tianjin. Deep soil was less polluted by PBDEs, which largely comes from the deposition, migration and infiltration of PBDEs in the surface soils. Overall, PBDEs level in the studied area was much lower than some typical e-waste recycling areas in south China, such as Guiyu and Qingyuan, but significantly higher than the non-e-waste recycling areas. BDE 209, BDE 138 and BDE 28 were the three dominant PBDE congeners in the soil. Principal component analysis (PCA) indicated that the commercial penta-BDEs and deca-BDE could be considered as the main sources of PBDEs pollution in this region. Redundancy analysis (RDA) suggested that the local PBDEs sources rather than soil properties influenced the PBDEs distribution in Ziya e-waste recycling area. This study systematically revealed the occurrence and distribution of PBDEs in soils from the biggest established circular economy park in northern China.
Collapse
Affiliation(s)
- Zhineng Wu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Wei Han
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Miaomiao Xie
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Min Han
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yao Li
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yingying Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| |
Collapse
|
41
|
Li H, Wang J, Wang R, Huang K, Luo W, Tao X, Dang Z, Yin H, Guo C, Lu G. Debromination of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) by synthetic Pd/Fe 0 and Cu/Fe 0 in different protic solvents. CHEMOSPHERE 2018; 212:946-953. [PMID: 30286551 DOI: 10.1016/j.chemosphere.2018.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/30/2018] [Accepted: 09/01/2018] [Indexed: 06/08/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) belong to a class of persistent organic pollutants (POPs), with potential toxicity to the liver, reproductive system, and development of mammals. The highly toxic and concentrated congener, 2,2',4,4'-tetrabromodiphenyl ether (BDE-47), was chosen to investigate debromination mechanisms by the two synthetic iron-based bimetals (Pd/Fe0 and Cu/Fe0) in two protic solvents (water and ethanol). SEM, XPS, and BET analyses showed that the synthetic bimetals Pd/Fe0 and Cu/Fe0 were spherical with diameters of about 100 nm and loaded with ∼1% (wt%) of Pd and Cu, respectively. GC-MS was used for the analysis of degradation products and the chromatograms showed that both Pd/Fe0 and Cu/Fe0 bimetals had effective reducing properties in water solvent. In ethanol solvent, debromination of BDE-47 by Pd/Fe0 showed a similar high activity, but BDE-47 could be hardly degraded by Cu/Fe0. The dominant debromination products of BDE-47 by Pd/Fe0 and Cu/Fe0 were ortho-substituted and para-substituted BDEs, respectively. Active H-atomic transfer was found to play a key role in the debromination of BDE-47 by Pd/Fe0 in both, water and ethanol, with a preference for para-debromination along with the formation of dibenzo-p-furan (DF) as the by-product, mainly in water. In contrast, electron transfer with a preference for ortho-debromination was found to play a predominant role for Cu/Fe0 system in water. More importance should be provided to active H-atomic transfer for its high efficiency. In-depth study on the mechanism of formation of by-product DF would be significant for its higher toxicity, possibility of accumulation and migration in the environment.
Collapse
Affiliation(s)
- Huafeng Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Jin Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Rui Wang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Wanying Luo
- College of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Xueqin Tao
- College of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| | - Chuling Guo
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, China.
| |
Collapse
|
42
|
Wang Y, Wei Y, Song W, Chen C, Zhao J. Photocatalytic Hydrodehalogenation for the Removal of Halogenated Aromatic Contaminants. ChemCatChem 2018. [DOI: 10.1002/cctc.201801222] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuanyuan Wang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
| | - Yan Wei
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
| | - Wenjing Song
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences Beijing 100049 P.R. China
| |
Collapse
|
43
|
Du Y, Wu QY, Lv XT, Ye B, Zhan XM, Lu Y, Hu HY. Electron donating capacity reduction of dissolved organic matter by solar irradiation reduces the cytotoxicity formation potential during wastewater chlorination. WATER RESEARCH 2018; 145:94-102. [PMID: 30121436 DOI: 10.1016/j.watres.2018.08.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 08/05/2018] [Accepted: 08/09/2018] [Indexed: 06/08/2023]
Abstract
After treated wastewater is discharged into surface water for unplanned indirect potable reuse, solar irradiation transforms the dissolved organic matter (DOM), which would alter the formation of disinfection byproducts (DBPs) and change the cytotoxicity formation potential (CtFP) during post-chlorination in drinking water treatment plants. This study investigated the effects of solar irradiation on the CtFP and total organic halogen formation potential (TOXFP) of wastewater during post-chlorination. Exposure to natural sunlight decreased the formation potential of cytotoxicity to Chinese Hamster Ovary cells. Under 24 h simulated solar irradiation, CtFP and TOXFP decreased by more than 40%. X-ray photoelectron spectra and Fourier transformation infrared spectra suggested solar irradiation destroyed the key DBP precursors containing phenolic hydroxyl moieties (Ph-OH). The destruction of Ph-OH under solar irradiation was reflected by a decrease in the electron donating capacity (EDC) of DOM and the post-chlorination decreased the EDC further. Increasing the irradiation-consumed EDC abated the chlorine-consumed EDC, while the chlorine-consumed EDC was positively correlated to the CtFP and TOXFP by means of the electrophilic substitution-aromatic ring cleavage. Solar irradiation thus reduced the CtFP and TOXFP in wastewater during post-chlorination. This study revealed that solar irradiation decreased the risks of treated wastewater for unplanned indirect potable reuse and provided a strategy of controlling CtFP and TOXFP via reducing EDC of DOM in pretreatments.
Collapse
Affiliation(s)
- Ye Du
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, PR China
| | - Qian-Yuan Wu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China.
| | - Xiao-Tong Lv
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, PR China; Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, PR China
| | - Bei Ye
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Institute, Shenzhen, 518055, PR China
| | - Xin-Min Zhan
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Institute, Shenzhen, 518055, PR China
| | - Yun Lu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, PR China
| | - Hong-Ying Hu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, PR China; Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Institute, Shenzhen, 518055, PR China.
| |
Collapse
|
44
|
Arkoosh MR, Van Gaest AL, Strickland SA, Hutchinson GP, Krupkin AB, Hicks MBR, Dietrich JP. Dietary exposure to a binary mixture of polybrominated diphenyl ethers alters innate immunity and disease susceptibility in juvenile Chinook salmon (Oncorhynchus tshawytscha). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:96-103. [PMID: 30041130 DOI: 10.1016/j.ecoenv.2018.07.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 07/11/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) have been used as flame retardants in consumer products and are now found in the aquatic environment. The presence of PBDEs puts the health and survival of aquatic species at risk due to the various toxic effects associated with exposure to these compounds. The effects of a binary dietary mixture of PBDEs on innate immunity and disease susceptibility of juvenile Chinook salmon (Oncorhynchus tshawytscha) were examined in the present study. Salmon were fed roughly 1:1 mixtures of two environmentally predominant PBDE congeners, BDE-47 and BDE-99. The six resulting whole body total PBDE concentrations ranged from less than the limit of quantification to 184 ng/g, wet weight (ww). The innate immune system was assessed by using two in vitro macrophage function assays. Specifically, assays that examined the ability of head kidney macrophages to: (1) engulf sheep red blood cells (SRBCs); and (2) produce a respiratory burst, as determined by the production of a reactive oxygen species, superoxide anion. Macrophages from salmon fed the BDE-47/99 mixture diets engulfed more SRBCs and produced greater superoxide anion than salmon fed the control diet. An increase in macrophage function was observed in fish with whole body total PBDE concentrations ranging from 2.81 ng/g, ww to 184 ng/g, ww. The mechanism for this increase in macrophage function due to PBDE exposure is currently unknown, but may be due to the ability of PBDEs to act as an endocrine receptor agonist and/or antagonist. Salmon exposed to the BDE-47/99 mixture diets were also challenged with the pathogenic bacteria, Vibrio (Listonella) anguillarum to determine disease susceptibility. Kaplan-Meier survival curves of fish exposed to the BDE-47/99 mixture and control diets were significantly different. The Cox proportional hazard risk ratios of disease-induced mortality in juvenile Chinook salmon with whole body concentrations of total PBDEs of 10.9, 36.8, and 184 ng/g, ww were significantly greater than the fish fed the control diet by 1.56, 1.83 and 1.50 times, respectively. Not all concentrations of the binary mixture diets had significant hazard ratios relative to the control diet, due to a non-monotonic concentration response curve. The mixture of PBDE congeners resulted in interactive effects that were generally non-additive and dependent upon the congener concentrations and metric examined. Consequently, predicting the interactive effects in juvenile Chinook salmon exposed to mixtures of PBDE congeners on innate immunity and disease susceptibility cannot be readily determined from the adverse effects of individual PBDE congeners.
Collapse
Affiliation(s)
- Mary R Arkoosh
- Environmental & Fisheries Sciences Division, Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| | - Ahna L Van Gaest
- Frank Orth & Associates, Under Contract to Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| | - Stacy A Strickland
- Frank Orth & Associates, Under Contract to Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| | - Greg P Hutchinson
- Frank Orth & Associates, Under Contract to Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| | - Alex B Krupkin
- Frank Orth & Associates, Under Contract to Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| | - Mary Beth Rew Hicks
- Lynker Technologies, Under Contract to Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| | - Joseph P Dietrich
- Environmental & Fisheries Sciences Division, Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2032 South East OSU Drive, Newport, OR 97365, USA.
| |
Collapse
|
45
|
Liu Z, Shao B, Zeng G, Chen M, Li Z, Liu Y, Jiang Y, Zhong H, Liu Y, Yan M. Effects of rhamnolipids on the removal of 2,4,2,4-tetrabrominated biphenyl ether (BDE-47) by Phanerochaete chrysosporium analyzed with a combined approach of experiments and molecular docking. CHEMOSPHERE 2018; 210:922-930. [PMID: 30208552 DOI: 10.1016/j.chemosphere.2018.07.114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 07/19/2018] [Accepted: 07/20/2018] [Indexed: 05/21/2023]
Abstract
Effects of rhamnolipids on the removal of 2,4,2,4-tetrabrominated biphenyl ether (BDE-47) by Phanerochaete chrysosporium (P. chrysosporium) had been investigated, as well as the influence of carbon source (i.e. glucose). The results showed that the removal efficiency was over 90% in all treatments in 7 d. Rhamnolipids at low concentrations (0.05 and 0.1 CMC (critical micelle concentration)) could promote the removal of BDE-47, however, the inhibition effects occurred at high concentrations (0.5 and 1.0 CMC). The further study indicated that rhamnolipids at low concentrations not only promote the growth of mycelium, but also had obvious promotion on ligninolytic enzymes activity (i.e. manganese peroxidase (MnP), lignin peroxidase (LiP) and laccase (Lac)), especially for MnP and Lac. However, the opposite effect was generated at high rhamnolipids concentrations. Meanwhile, glucose played an active role for BDE-47 removal. For better understanding the degradation mechanism, the degradation product analysis and molecular docking had been introduced to this study. The degradation product analysis indicated that OH-PBDEs were the major degradation products and hydroxylation should be the important degradation pathway. The docking results showed that the ideal binding conformation occurred between ligninolytic enzymes and BDE-47, and hydrophobic interactions were the main interaction. Moreover, hydrogen bonds and hydrophobic interactions both existed in ligninolytic enzymes and rhamnolipids interaction. That might be the reason that rhamnolipids affected enzymes activity. These results indicated that P. chrysosporium might be a type of ideal microorganisms in the removal of BDE-47 pollution, and rhamnolipids could be a type of additives for better removal efficiency.
Collapse
Affiliation(s)
- Zhifeng Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Binbin Shao
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Ming Chen
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Zhigang Li
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yujie Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yilin Jiang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Hua Zhong
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China; State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, PR China
| | - Yang Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Ming Yan
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| |
Collapse
|
46
|
Khaled A, Rivaton A, Richard C, Jaber F, Sleiman M. Phototransformation of Plastic Containing Brominated Flame Retardants: Enhanced Fragmentation and Release of Photoproducts to Water and Air. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:11123-11131. [PMID: 30169020 DOI: 10.1021/acs.est.8b03172] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Increasing attention is being paid to the environmental fate and impact of plastics and their additives under sunlight exposure. We evaluated the photodegradation of polystyrene (PS) films (∼100 μm) containing brominated flame retardants (BFRs): decabromodiphenylether (BDE-209), tetrabromobisphenol A (TBBPA), and tetrabromobisphenol A-bis (2.3-dibromopropylether) (TBBPA-DBPE). Irradiations were performed in a solar simulator and outdoors. Infrared (IR) analyses indicated an acceleration of the photooxidation rate of fire-retarded PS films compared to pure PS with an enhancement factor of 7 for TBBPA-DBPE and TBBPA, and 10 for BDE-209. The accelerating effect was found to be correlated with the quantum yield for BFR photodegradation and its absorbance in the PS films. The presence of BFRs also modified the PS photooxidation mechanism and resulted in the formation of 14 brominated photoproducts via bromination and oxidation of PS. Furthermore, a drastic increase in chain scissions and loss of molecular weight was revealed by size exclusion chromatography. This enhanced degradation of PS led to significant leaching (15%) of oxidation products from PS films after immersion in water, and to the gas-phase emission of several volatile brominated products. Our findings suggest that fire-retarded plastics may be a source of potentially hazardous contaminants when exposed to sunlight.
Collapse
Affiliation(s)
- Amina Khaled
- Université Clermont Auvergne, CNRS, SIGMA Clermont , Institut de Chimie de Clermont-Ferrand , F-63000 Clermont-Ferrand , France
| | - Agnès Rivaton
- Université Clermont Auvergne, CNRS, SIGMA Clermont , Institut de Chimie de Clermont-Ferrand , F-63000 Clermont-Ferrand , France
| | - Claire Richard
- Université Clermont Auvergne, CNRS, SIGMA Clermont , Institut de Chimie de Clermont-Ferrand , F-63000 Clermont-Ferrand , France
| | - Farouk Jaber
- Laboratory of Analysis of Organic Compounds (509), Faculty of Sciences I , Lebanese University , Hadath, Beirut , Lebanon
| | - Mohamad Sleiman
- Université Clermont Auvergne, CNRS, SIGMA Clermont , Institut de Chimie de Clermont-Ferrand , F-63000 Clermont-Ferrand , France
| |
Collapse
|
47
|
Dubowski Y, Inibtawi M, Broday DM. Seasonal variations of polybrominated flame retardants bound to car dust under Mediterranean climate. J Environ Sci (China) 2018; 70:124-132. [PMID: 30037399 DOI: 10.1016/j.jes.2017.11.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 11/05/2017] [Accepted: 11/21/2017] [Indexed: 06/08/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are commercial flame retardants that have been commonly used in vehicle interior to reduce fire-related hazards. Due to high temperatures and intense insolation that can be attained inside cars parked in the sun, additive PBDEs are prone to leach out and attach to in-vehicle dust, as well as to photo-debrominate. This study examines seasonal variations of concentrations of three common PBDE congeners (BDE-47, BDE-99 and BDE-209) in car dust in Israel. The overall concentrations of these BDEs ranged from 1 to 29μg/g, and were higher in the summer than in the winter (average of 10.2 and 5.3μg/g, respectively). Congener-specific concentrations showed distinct seasonal pattern, representing the interplay between leaching, evaporation and photodebromination. Photolysis of the three congeners, while adsorbed on glass filters and exposed to solar radiation, revealed first order kinetics with debromination rates on the order of 10-2/min. Hence, seasonal variations of the meteorological conditions were found to affect the in-vehicle PBDE concentrations, and are therefore expected also to affect the exposure of passengers to PBDEs.
Collapse
Affiliation(s)
- Yael Dubowski
- Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel.
| | - Maisa Inibtawi
- Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - David M Broday
- Faculty of Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel
| |
Collapse
|
48
|
Tang T, Lu G, Wang R, Chen H, Fang Y, Huang K, Zheng J, Zou M, Tao X, Yin H, Dang Z. Debromination of polybrominated diphenyl ethers (PBDEs) by zero valent zinc: Mechanisms and predicting descriptors. JOURNAL OF HAZARDOUS MATERIALS 2018; 352:165-171. [PMID: 29609148 DOI: 10.1016/j.jhazmat.2018.03.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 03/15/2018] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are a class of brominated flame retardants that are ubiquitous in the environment. The physical and chemical properties of PBDEs make them difficult to degrade, with the conventional remediation methods being relatively inefficient. In this study, the reactivity of zero valent zinc (ZVZ) toward 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) was evaluated under aqueous solution. First-order rate constants (kobs) for BDE-47 disappearance increased with decreased pH, which is attributed to the dissolution of surface zinc oxides that promote the contact between the active site on zinc surface and BDE molecules. The kobs of ten investigated PBDEs in ZVZ system are positively correlated with the energy of lowest unoccupied orbitals (ELUMO) of PBDEs (R2 = 0.902). The debromination pathways of BDE-47 in ZVZ system are: BDE-47 → BDE-28 → BDE-15 → BDE-3 → DE, which is the same to the debromination pathways of BDE-47 in zero valent iron (ZVI) in previous study. In addition, the singly occupied molecular orbitals (SOMOs) of the BDE anions can well reflect the actual debromination pathways of PBDEs by comparing the size of the CBr antibonding characterized lobes. Our results suggest that the debromination of PBDEs by ZVZ is based on the electron transfer mechanism, and the SOMOs of BDE anions can be used to predict the debromination pathways of untested PBDEs.
Collapse
Affiliation(s)
- Ting Tang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou, 510006, China.
| | - Rui Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Huan Chen
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Yingcong Fang
- School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian, 116012, China
| | - Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Jiayi Zheng
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Mengyao Zou
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Xueqin Tao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China
| |
Collapse
|
49
|
Huang K, Lu G, Zheng Z, Wang R, Tang T, Tao X, Cai R, Dang Z, Wu P, Yin H. Photodegradation of 2,4,4'-tribrominated diphenyl ether in various surfactant solutions: kinetics, mechanisms and intermediates. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2018; 20:806-812. [PMID: 29664078 DOI: 10.1039/c8em00033f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Currently, photodegradation has been proven to be an important way of eliminating polybrominated diphenyl ethers (PBDEs) from the environment. However, the mechanism of PBDE photodegradation in surfactants by UV light is still unclear. In this study, 2,4,4'-tribrominated diphenyl ether (BDE-28) was selected as the target pollutant to investigate the photodegradation of PBDEs in Triton X-100 (TX-100), sodium dodecylbenzenesulfonate (SDBS) and cetyltrimethylammonium bromide (CTAB) solutions. All photolysis experiments were performed above the critical micelle concentration (CMC). The results showed that photodebromination was the major pathway of BDE-28 photodestruction in different surfactants. From 1.5 CMC to 4 CMC, the photodegradation rates of BDE-28 increased as the concentration of TX-100 increased, and the increased concentration of SDBS has a negative effect on the photodegradation rate of BDE-28 due to the light barrier of SDBS. There was no obvious change in the case of CTAB. BDE-28 was debrominated to 4,4'-dibrominated diphenyl ether (BDE-15), 4-dibrominated diphenyl ether (BDE-3) and diphenyl ether (DE), subsequently. In addition, 2,8-dibrominated dibenzofuran (2,8-BDF), 2-monobrominated dibenzofuran (2-monoBDF), and dibenzofuran (DF) were produced via an intramolecular elimination of HBr from the PBDEs that had an ortho-bromine substituent. Moreover, DF can also be formed from DE and the generated amount of DF in CTAB was higher than that generated in SDBS and TX-100. We have also detected ortho-hydroxydiphenyl and para-hydroxydiphenyl during the photodegradation process.
Collapse
Affiliation(s)
- Kaibo Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Sharma P, Chadha P, Saini HS. Tetrabromobisphenol A induced oxidative stress and genotoxicity in fish Channa punctatus. Drug Chem Toxicol 2018. [DOI: 10.1080/01480545.2018.1441864] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Prince Sharma
- Department of Zoology, Guru Nanak Dev University, Amritsar, India
| | - Pooja Chadha
- Department of Zoology, Guru Nanak Dev University, Amritsar, India
| | | |
Collapse
|