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Nian K, Xiong W, Tao Y, Zhu Z, Pan X, Zhang K, Zhang X. An Insight into the Sorption Behavior of 2,3,7,8-Tetrachlorodibenzothiophene on the Sediments and Paddy Soil from Chaohu Lake Basin. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11346. [PMID: 36141619 PMCID: PMC9517350 DOI: 10.3390/ijerph191811346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/06/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
Considering the frequent detection of polychlorinated dibenzothiophenes (PCDTs) in various environmental matrices and the potential ecological health risks, the environmental behavior of such compounds needs to be elucidated further. In this work, the sorption behavior of 2,3,7,8-tetrachlorodibenzothiophene (2,3,7,8-TCDT) onto three sediments and paddy soil from Chaohu Lake were investigated via batch equilibration experiments. From the perspective of sorption kinetics and isotherms, the sorption characteristics and mechanism of 2,3,7,8-TCDT on the above four carriers were compared, and the relationship between their structural characteristics and soil sorption capacity was discussed. Results suggested that rapid sorption played the primary role during the sorption process of 2,3,7,8-TCDT and the corresponding sorption isotherms were well fitted using the Freundlich logarithmic model. Moreover, the effects of pH and dissolved organic matter (DOM) on the sorption of 2,3,7,8-TCDT were investigated. The maximum sorption capacity of 2,3,7,8-TCDT on sediment was under acidic pH condition (pH = 4.0). Meanwhile, DOM at a low level promoted the sorption capacity of sediment toward 2,3,7,8-TCDT, while the high concentration of DOM inhibited this effect. In addition, the values of logKoc were obtained using high-performance liquid chromatography (HPLC) and did not show any significant correlation with organic carbon (OC) contents, thereby indicating that the partition effect was the dominating influencing factor for the sorption of 2,3,7,8-TCDT both on sediments and soil. This work provides useful data to understand the sorption behavior of 2,3,7,8-TCDT on sediments and soil and assess its potential environmental risk.
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Affiliation(s)
- Kainan Nian
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
| | - Wenli Xiong
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
| | - Yalu Tao
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
| | - Ziqing Zhu
- China Science and Technology Intelligent Agricultural Valley Collaborative Innovation Research Institute, Hefei 231131, China
| | - Xiaoxue Pan
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
| | - Kang Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, China
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Ye C, Xiong W, Shi S, Shi J, Yang W, Zhang X. Biomarker Responses, Gene Expression Alterations, and Histological Changes in Zebrafish (Danio rerio) After In Vivo Exposure to Polychlorinated Diphenyl Ethers. Front Physiol 2022; 13:907906. [PMID: 35721562 PMCID: PMC9203962 DOI: 10.3389/fphys.2022.907906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
Polychlorinated diphenyl ethers (PCDEs) have been detected in various aquatic matrices, which pose potential threats to aquatic ecosystem security. In this work, both micro and macro analysis methods were used to assess the toxicity of PCDEs to zebrafish. Results indicated that after in vivo PCDE exposure, the oxidative stress and related gene of Danio rerio were significantly changed. The higher concentration or longer exposure time could cause more severe oxidative stress in zebrafish tissues. Compared with among the five tested compounds, more obvious changes in the level of oxidative biomarkers of lower chlorinated PCDEs’ (4-mono-CDE and 4,4′-di-CDE) exposure groups were observed. The integrated biomarker response analysis and gene expression results also indicate a similar trend. Histopathological observation suggested that 4,4′-di-CDE could render liver nuclei enlargement and necrosis, hepatocyte vacuolation, and the development inhibition of ovarian cells. Transmission electron microscope photos showed that 4,4′-di-CDE caused organelle damage in the liver and ovary, including the rupture of the endoplasmic reticulum, swelling of mitochondria, and condensation of chromatin in the liver and mitochondria disappeared significantly in the ovary. The degree of damage is enhanced with the increasing exposure doses. In addition, PCDEs also significantly altered vitellogenin content and related gene (vtg1) expression, suggesting that PCDEs may be estrogen endocrine disruptors. Overall, these results provided some valuable toxicological data of PCDEs on aquatic species.
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Affiliation(s)
- Chunmeng Ye
- School of Resources and Environmental Engineering, Anhui University, Hefei, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, China
| | - Wenli Xiong
- School of Resources and Environmental Engineering, Anhui University, Hefei, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, China
| | - Shuaishuai Shi
- School of Resources and Environmental Engineering, Anhui University, Hefei, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, China
| | - Jiaqi Shi
- Nanjing Institute of Environmental Sciences of the Ministry of Ecology and Environment, Nanjing, China
- *Correspondence: Jiaqi Shi, ; Xuesheng Zhang,
| | - Wenhui Yang
- School of Resources and Environmental Engineering, Anhui University, Hefei, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei, China
- Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei, China
- *Correspondence: Jiaqi Shi, ; Xuesheng Zhang,
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Yang W, Huang X, Wu Q, Shi J, Zhang X, Ouyang L, Crump D, Zhang X, Zhang R. Acute toxicity of polychlorinated diphenyl ethers (PCDEs) in three model aquatic organisms (Scenedesmus obliquus, Daphnia magna, and Danio rerio) of different trophic levels. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 805:150366. [PMID: 34818752 DOI: 10.1016/j.scitotenv.2021.150366] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 09/07/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
The frequent detection of polychlorinated diphenyl ethers (PCDEs) in aquatic systems has aroused widespread concerns, however, their potential hazard to aquatic ecosystems has been poorly understood. Here the acute toxicity of 12 PCDE congeners was evaluated in three model aquatic organisms representing different trophic levels following OECD test guidelines, including green algae (Scenedesmus obliquus), water flea (Daphnia magna), and zebrafish (Danio rerio). Dose-dependent increases in growth inhibition and mortality were observed for all tested PCDE congeners. Most of the PCDE congeners, in particular 3,3',4,4'-tetra-CDE, were highly toxic to the three aquatic organisms with EC50 or LC50 values below 1 mg L-1. Their toxicities were generally comparable with those of certain polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). Moreover, D. magna was the most sensitive species among the three aquatic organisms. In addition, the EC50 or LC50 values had an extremely significant correlation with the n-octanol-water partition coefficient (logKow) of the PCDE congeners. The established quantitative structure-property relationship (QSPR) models indicated that the molecular polarizability (α) could significantly influence the acute toxicity of PCDEs on Daphnia magna and Danio rerio, and the energy of the lowest unoccupied molecular orbital (ELUMO) is the key factor of the acute toxicity of PCDEs in Scenedesmus obliquus. In addition, even at environmental levels, 3,3',4,4'-tetra-CDE could induced seveve oxidative damages in the three aquactic species. These findings would contribute to the understanding of adverse effects of PCDEs in aquatic organisms.
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Affiliation(s)
- Wenhui Yang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, Anhui, China
| | - Xinxin Huang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, Anhui, China
| | - Qiuxuan Wu
- School of Water Conservancy and Environment, University of Jinan, Jinan 100085, China
| | - Jiaqi Shi
- Nanjing Institute of Environmental Sciences of the Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, Anhui, China.
| | - Lingwen Ouyang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China; Laboratory of Wetland Protection and Ecological Restoration, Anhui University, Hefei 230601, Anhui, China
| | - Doug Crump
- Ecotoxicology and Wildlife Health Division, Environment and Climate Change Canada, National Wildlife Research Centre, Carleton University, 1125 Colonel By Drive, Ottawa K1A 0H3, Canada
| | - Xiaowei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Rui Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan 100085, China.
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Enhanced plant-microbe remediation of PCBs in soil using enzyme modification technique combined with molecular docking and molecular dynamics. Biochem J 2021; 478:1921-1941. [PMID: 33900386 DOI: 10.1042/bcj20210104] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 11/17/2022]
Abstract
The study on the enhanced mechanisms of the enzymes involved in plant absorption, plant degradation, and microbial mineralization in the remediation of soils contaminated with polychlorinated biphenyls (PCBs) is of great significance for the application of plant-microbe combined remediation technique in PCB-contaminated soils. The present study first used a combination of molecular docking and molecular dynamics methods to calculate the effects of the plant absorption enzyme, plant degradation enzyme, and microbial mineralization enzyme on the PCBs in the soil environment. A multifunctional plant degradation enzyme was constructed with three functional roles of absorption, degradation, and mineralization using amino acid sequence recombination and site-directed mutagenesis to modify the template of plant degradation enzyme. Finally, using the Taguchi experimental design-assisted molecular dynamics simulation method, the suitable external environmental conditions of plant-microbe combined remediation of the PCB-contaminated soil were determined. In total, six multifunctional plant degradation enzymes were designed, which exhibited a significantly improved efficiency of PCB degradation. In comparison to the complex of plant absorption enzyme, plant degradation enzyme, and microorganism mineralization enzyme (6QIM-3GZX-1B85), the six multifunctional plant degradation enzymes exhibited significantly higher efficiency (2.10-2.38 times) in degrading the PCBs, with a maximum of 2.69 times under suitable external environmental conditions.
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Cheng D, Cao K, Wang T, Zhang X, Feng M, Liu H. Evaluation of the oxidative stress in liver of crucian carp (Carassius auratus) exposed to 3,4,4'-tri-CDE, 2-MeO-3',4,4'-tri-CDE, and 2-HO-3',4,4'-tri-CDE. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:5164-5175. [PMID: 30604365 DOI: 10.1007/s11356-018-3938-2] [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: 07/20/2018] [Accepted: 12/06/2018] [Indexed: 06/09/2023]
Abstract
Polychlorinated diphenyl ethers (PCDEs) are a class of potential persistent organic contaminants, which have been widely detected in aquatic environment. In the present study, the effects of 3,4,4'-tri-CDE and its two possible metabolites (2-MeO-3',4,4'-tri-CDE and 2-HO-3',4,4'-tri-CDE) on oxidative stress biomarkers in liver of Carassius auratus were evaluated. The fish were treated with these three compounds at different doses (0.1, 1, and 10 μg/L) via semi-static water exposure. The liver samples were individually taken at 3, 7, and 21 days for analysis of oxidative stress indicators, including superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), reduced glutathione (GSH), and malondialdehyde (MDA). Compare to the control group, the hepatic antioxidant enzyme activity and GSH contents showed significant decreases (p < 0.05) at high-dose treatment (10 μg/L) and prolonged exposure time (21 days) in most of the toxicant-treated groups, indicating the occurrence of oxidative stress in fish liver. However, no consistent trend of the variations of antioxidant parameters was observed at low doses (0.1 and 1 μg/L). Meanwhile, the lipid peroxidation was significantly induced with extending exposure time and increasing dose. In addition, the toxicity order of three compounds was discussed using the integrated biomarker response (IBR) index. Notably, 2-HO-3',4,4'-tri-CDE was indicated to cause the most severe hepatic oxidative stress.
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Affiliation(s)
- Danru Cheng
- School of Resources and Environmental Engineering, Anhui University, Hefei, 230601, Anhui, China
| | - Kan Cao
- Environmental Monitoring Department of Jiangxi Province, Nanchang, 330077, Jiangxi, China
| | - Tantan Wang
- School of Resources and Environmental Engineering, Anhui University, Hefei, 230601, Anhui, China
| | - Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei, 230601, Anhui, China.
| | - Mingbao Feng
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX, 77843, USA
| | - Hui Liu
- College of Biological and Chemical Engineering, Jiaxing University, Jiaxing, 314001, Zhejiang, China
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Zhang X, Wang T, Gao L, Feng M, Qin L, Shi J, Cheng D. Polychlorinated diphenyl ethers (PCDEs) in surface sediments, suspended particulate matter (SPM) and surface water of Chaohu Lake, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 241:441-450. [PMID: 29860160 DOI: 10.1016/j.envpol.2018.05.077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 05/22/2018] [Accepted: 05/22/2018] [Indexed: 06/08/2023]
Abstract
Polychlorinated diphenyl ethers (PCDEs) are typical halogenated aromatic pollutants that have shown various toxicological effects on organisms. However, the contamination status of PCDEs in the fresh water lakes of China remains poorly researched. In this study, the levels of 15 congeners of PCDEs in the sediments, suspended particulate matter (SPM) and water of Chaohu Lake were determined. The results showed that the ranges of concentrations of total PCDEs (ΣPCDEs) in the sediment, SPM and water were 0.279 ng g-1 dry weight (d.w.)-2.474 ng g-1 d.w., 0.331 ng g-1 d.w.-2.013 ng g-1 d.w. and 0.351 ng L-1-2.021 ng L-1, respectively. The most abundant congeners found in sediments, SPM and water were 3,3',4,4'-tetra-CDE, deca-CDE and 2,4,6-tri-CDE, with average contributive ratios of 17.36%, 15.48% and 20.63%, respectively. The medium and higher chlorinated PCDEs (e.g., penta- and deca-CDEs) were the dominant congeners in sediments and SPM. The percentages of lower chlorinated PCDEs (e.g., tri-CDEs) in the water were higher than those in the sediments. The combined input of ΣPCDEs from the eight main tributaries to Chaohu Lake was estimated at 6.94 kg y-1. Strong linear correlations between the concentrations of ΣPCDEs and organic carbon (OC) contents in three type samples from Chaohu Lake suggested OC could influence the distribution of PCDEs in Chaohu Lake substantially. In addition, the calculated average organic carbon normalized partition coefficients (logKoc) of 15 PCDEs between water and SPM were in the range of 4.55-5.45 mL g-1. This study confirmed that Chaohu Lake is contaminated by PCDEs.
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Affiliation(s)
- Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Anhui, Hefei, 230601, China.
| | - Tantan Wang
- School of Resources and Environmental Engineering, Anhui University, Anhui, Hefei, 230601, China
| | - Lei Gao
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai, 200240, China
| | - Mingbao Feng
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA
| | - Li Qin
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Jiaqi Shi
- Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection, Jiangsu, Nanjing, 210042, China
| | - Danru Cheng
- School of Resources and Environmental Engineering, Anhui University, Anhui, Hefei, 230601, China
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Zhang X, Cheng D, Shi J, Qin L, Wang T, Fang B. QSPR modeling of the logK ow and logK oc of polymethoxylated, polyhydroxylated diphenyl ethers and methoxylated-, hydroxylated-polychlorinated diphenyl ethers. JOURNAL OF HAZARDOUS MATERIALS 2018; 353:542-551. [PMID: 29655533 DOI: 10.1016/j.jhazmat.2018.03.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 02/08/2018] [Accepted: 03/22/2018] [Indexed: 06/08/2023]
Abstract
In the present study, the structural parameters of 209 types of polymethoxylated diphenyl ethers (PMeODEs), 209 types of polyhydroxylated diphenyl ethers (PHODEs), seven types of methoxylated-polychlorinated diphenyl ethers (MeO-PCDEs) and seven types of hydroxylated-polychlorinated diphenyl ethers (HO-PCDEs) were calculated using the Gaussian 09 program at the B3LYP/6-311G** level. Using structural and positional parameters as descriptors, quantitative structure-property relationships (QSPR) models for the prediction of n-octanol/water partition coefficient (logKow) and soil sorption coefficient normalized to organic carbon (logKoc) were established and verified. The position parameters N2(6), N3(5) and N4 were the main positional factors influencing logKow and logKoc of PMeODEs and PHODEs. The molecular polarizability α was entered into the QSPR models of the logKow and logKoc of PMeODEs, PHODEs and MeO/HO-PCDEs, indicating that the molecular volume could influence the two environment-related properties of DEs significantly. All of the established QSPR models showed good goodness-of-fit, robustness, and predictive ability. The two models for all of the tested DEs are slightly inferior compared with the models for only a class of compounds. In addition, application domain analysis indicated that the models reliably predicted the logKow and logKoc of the mon- to hexa-DEs.
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Affiliation(s)
- Xuesheng Zhang
- School of Resources and Environmental Engineering, Anhui University, Anhui Hefei, 230601, China.
| | - Danru Cheng
- School of Resources and Environmental Engineering, Anhui University, Anhui Hefei, 230601, China
| | - Jiaqi Shi
- Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection, Jiangsu Nanjing, 210042, China
| | - Li Qin
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Tantan Wang
- School of Resources and Environmental Engineering, Anhui University, Anhui Hefei, 230601, China
| | - Bingxin Fang
- School of Resources and Environmental Engineering, Anhui University, Anhui Hefei, 230601, China
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