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de Oliveira Santiago Santos G, Athie Goulart L, Sánchez-Montes I, Santos da Silva R, de Vasconcelos Lanza MR. Electrochemically enhanced iron oxide-modified carbon cathode toward improved heterogeneous electro-Fenton reaction for the degradation of norfloxacin. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:118736-118753. [PMID: 37917268 DOI: 10.1007/s11356-023-30536-2] [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: 07/05/2023] [Accepted: 10/13/2023] [Indexed: 11/04/2023]
Abstract
In this work, different iron-based cathode materials were prepared using two different approaches: a novel one-step approach, which involved the incorporation of iron oxide with Printex® L6 carbon/PTFE (PL6C/PTFE) on bare carbon felt (CF) and a two-step approach, where iron oxide is deposited onto CF previously modified with PL6C/PTFE. The results obtained from the physical characterization indicated that the presence of iron oxide homogeneously dispersed on the felt fibers with the CF 3-D network kept intact in the one-step approach; whereas the formation of iron oxide aggregates between the felt fibers for material obtained using the two-step approach. Among the iron oxide-based cathodes investigated, the iron-incorporated electrode exhibited the greatest efficiency in terms of the removal and mineralization of norfloxacin (NOR) under neutral pH (complete NOR removal in less than 30 min with around 50% mineralization after 90 min). The findings of this study show that the low cost and simple-to-prepare iron-modified carbon-based materials in HEF process led to the enhanced degradation of organic contaminants in aqueous solutions.
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Affiliation(s)
| | - Lorena Athie Goulart
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, 13560-970, Brazil
| | - Isaac Sánchez-Montes
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, 13560-970, Brazil
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Fang C, Xu H, Wang S, Shao C, Liu C, Wang H, Huang Q. Simultaneous removal of norfloxacin and chloramphenicol using cold atmospheric plasma jet (CAPJ): Enhanced performance, synergistic effect, plasma-activated water (PAW) contribution, mechanism and toxicity evaluation. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131306. [PMID: 37004443 DOI: 10.1016/j.jhazmat.2023.131306] [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: 12/16/2022] [Revised: 03/21/2023] [Accepted: 03/25/2023] [Indexed: 05/03/2023]
Abstract
The extensive abuse and inadvertent discharge of various antibiotics into the environment has become a serious problem for posing a big threat to human health. In order to deal with this problem, we utilized cold atmospheric plasma jet (CAPJ) to treat two different antibiotics, namely, norfloxacin and chloramphenicol, and investigated the efficiencies and corresponding mechanisms for removing the mixed antibiotics. In the application of the CAPJ technique, we made use of not only the direct plasma processing, but also the indirect plasma-activated water (PAW) treatment. The efficiency for mixed antibiotics treatment was considerably enhanced as compared to the efficiency for treatment of single antibiotics. The contributions from the CAPJ-induced reactive oxygen/nitrogen species (RONS) were examined, showing that ·OH and 1O2 played a major role in the degradation of norfloxacin and chloramphenicol in the direct plasma treatment, while 1O2 played a major role in the PAW treatment. The bio-toxicity evaluation was also provided to verify the ecological safety of the CAPJ treatment. As such, this work has not only showed the effectiveness of CAPJ treatment of mixed antibiotics, but also elucidated the mechanisms for the enhanced treatment efficiency, which may provide a new solution for treatment of antibiotics in the environment.
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Affiliation(s)
- Cao Fang
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Anhui Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institute of Intelligent Agriculture, Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate School, University of Science & Technology of China, Hefei 230026, China
| | - Hangbo Xu
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Anhui Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institute of Intelligent Agriculture, Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Shenhao Wang
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Anhui Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institute of Intelligent Agriculture, Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate School, University of Science & Technology of China, Hefei 230026, China
| | - Changsheng Shao
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Chao Liu
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Anhui Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institute of Intelligent Agriculture, Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate School, University of Science & Technology of China, Hefei 230026, China
| | - Han Wang
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Anhui Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institute of Intelligent Agriculture, Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate School, University of Science & Technology of China, Hefei 230026, China
| | - Qing Huang
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Anhui Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institute of Intelligent Agriculture, Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Science Island Branch of Graduate School, University of Science & Technology of China, Hefei 230026, China.
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Li W, Liu K, Min Z, Li J, Zhang M, Korshin GV, Han J. Transformation of macrolide antibiotics during chlorination process: Kinetics, degradation products, and comprehensive toxicity evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159800. [PMID: 36309261 DOI: 10.1016/j.scitotenv.2022.159800] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 09/27/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Antibiotics are ubiquitous in wastewater and surface water and their presence is of grave concern. Chlorination, an important disinfection process used in wastewater treatment plants and waterworks, causes antibiotics to be degraded. However, interactions of antibiotics with chlorine result in the generation of multiple transformation products (TPs). TPs may be more toxic than the parent compounds, but their structures, yields and ecotoxicity remain to be ascertained in most cases. This study examined the degradation by chlorine of two typical macrolide (MLs) antibiotics, erythromycin (ERY) and roxithromycin (ROX), and identified the TPs formed as a result of ERY and ROX chlorination. The ecotoxicity of ERY, ROX and their TPs was evaluated using a combination of bioassay and ECOSAR prediction. The degradation of ERY and ROX followed pseudo-first-order kinetic at the molar ratio of FAC to MLs of 10:1, and the degradation kinetic rate depends on pH values. Six TPs of ERY including three chlorinated TPs, and six TPs of ROX including two chlorinated TPs were identified. The tertiary N of the desosamine moiety of ERY and ROX was determined to be the main reactive site. Demethylation and chlorine substitution at the reactive site are the main degradation pathways of ERY and ROX. ECOSAR results showed that the chlorinated byproducts of ERY TP578, TP542 and TP528, and the reduced hydroxylation products of ROX TP851 exhibited higher ecotoxicity than their parent compounds. However, algae growth inhibition assays indicated that the overall ecotoxicity of the chlorinated ERY or ROX mixture was lower than that of ERY or ROX prior to chlorination. This may be attributed to the removal of the parent compound and lower yields of toxic substances. While the yields of the toxic TPs may be low, their accumulation and combined effects of the TPs and other co-occurring pollutants should be examined further.
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Affiliation(s)
- Wei Li
- College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; National Positioning Observation Station of Hung-tse Lake Wetland Ecosystem in Jiangsu Province, Hongze, Jiangsu 223100, China.
| | - Kai Liu
- College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Zhongfang Min
- College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Jiping Li
- College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Meng Zhang
- College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; National Positioning Observation Station of Hung-tse Lake Wetland Ecosystem in Jiangsu Province, Hongze, Jiangsu 223100, China
| | - Gregory V Korshin
- Department of Civil and Environmental Engineering, Box 352700, University of Washington, Seattle, WA 98195-2700, United States
| | - Jiangang Han
- College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; National Positioning Observation Station of Hung-tse Lake Wetland Ecosystem in Jiangsu Province, Hongze, Jiangsu 223100, China
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Wang C, Hansen HCB, Andersen ML, Strobel BW, Ma H, Dodge N, Jensen PE, Lu C, Holm PE. Fast peroxydisulfate oxidation of the antibiotic norfloxacin catalyzed by cyanobacterial biochar. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129655. [PMID: 35901634 DOI: 10.1016/j.jhazmat.2022.129655] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
Peroxydisulfate (PDS) is a common oxidant for organic contaminant remediation. PDS is typically activated by metal catalysts to generate reactive radicals. Unfortunately, as radicals are non-selective and metal catalysts may cause secondary contamination, alternative selective non-radical pathways and non-metal catalysts need attention. Here we investigated PDS oxidation of commonly detected antibiotic Norfloxacin (NOR) using cyanobacterial nitrogen rich biochars (CBs) as catalysts. NOR was fully degraded by CB pyrolysed at 950 °C (CB950) within 120 min. CB950 caused threefold faster degradation than low pyrolysis temperature (PT) CBs and achieved a maximum surface area normalized rate constant of 4.38 × 10-2 min-1 m-2 L compared to widely used metal catalysts. CB950 maintained full reactivity after four repeated uses. High defluorination (82%) and mineralization (>82%) were observed for CB950/PDS. CBs were active over a broad pH range (3-10), but with twice as high rates under alkaline compared with neutral conditions. NOR is degraded by organic, •OH and SO4•- radicals in low PT CBs/PDS systems, where the presence of MnII promotes radical generation. Electron transfer reactions with radicals supplemented dominate high PT CBs/PDS systems. This study demonstrates high PT biochars from algal bloom biomass may find use as catalysts for organic contaminant oxidation.
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Affiliation(s)
- Chen Wang
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark.
| | - Hans Christian Bruun Hansen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Mogens Larsen Andersen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Bjarne W Strobel
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Hui Ma
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Nadia Dodge
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Poul Erik Jensen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Changyong Lu
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Peter E Holm
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
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Yang K, Lin H, Feng X, Jiang J, Ma J, Yang Z. Energy-efficient removal of trace antibiotics from low-conductivity water using a Ti 4O 7 reactive electrochemical ceramic membrane: Matrix effects and implications for byproduct formation. WATER RESEARCH 2022; 224:119047. [PMID: 36103779 DOI: 10.1016/j.watres.2022.119047] [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: 07/01/2022] [Revised: 08/15/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
The inevitably high energy consumption of traditional electrochemical processes to treat low-conductivity water has limited their wider application. Herein, we present an energy-efficient alternative, i.e., a Ti4O7 reactive electrochemical ceramic membrane (Ti4O7-REM) system with a superior mass transfer ability. For the removal of 10-200 μM norfloxacin (NOR) from low-conductivity (178-832 μS cm-1) water, the Ti4O7-REM system increased the kinetics rate constant by 4.3-34.0 times, thus decreasing the energy cost by 80.5-97.3% compared with a flow-by system. The rapid NOR removal was related to the enhanced direct electron transfer process in the Ti4O7-REM system, which allowed for higher resistance to HCO3- scavenging and a favorable reaction between NOR and the active sites. Meanwhile, this mechanism likely contributed to the less formation of inorganic chlorinated product, ClO3-, in the presence of Cl-. Although organic chlorinated byproducts were not detected during NOR degradation in the Ti4O7-REM system, Cl- influenced the speciation of the intermediates. A single-pass Ti4O7-REM system demonstrated 94-97% removal of trace antibiotics from real water samples in 30 s. The additional energy consumption (<0.02 kWh m-3) using a Ti4O7-REM system only contributed to 5.0-6.4% of the total in a typical tertiary wastewater treatment plant. Based on the above results, we can conclude that the convection-enhanced REM technique is viable for the purification of low-conductivity natural waters.
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Affiliation(s)
- Kui Yang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Hui Lin
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China.
| | - Xingwei Feng
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Jin Jiang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Jinxing Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China.
| | - Zhifeng Yang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China.
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CuCoFe2O4@MC/AC as a new hybrid magnetic nanocomposite for metronidazole removal from wastewater: Bioassay and toxicity of effluent. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121366] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Malta C, Silva Barcelos R, Segat H, Burger M, Souza Bier C, Morgental R. Toxicity of bioceramic and resinous endodontic sealers using an alternative animal model: Artemia salina. J Conserv Dent 2022; 25:185-188. [PMID: 35720815 PMCID: PMC9205353 DOI: 10.4103/jcd.jcd_401_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 01/19/2022] [Indexed: 11/21/2022] Open
Abstract
Aims: The present study assessed the toxicity of a novel calcium silicate-based root canal sealer (Bio-C Sealer) in comparison to Endosequence BC Sealer and AH Plus through a lethality assay involving brine shrimp (Artemia salina). Methods: Brine shrimp cysts were incubated for 24 h for the hatching of the larvae, which were then exposed to different concentrations (2.5, 5, 10, 20, 40, 80, and 100 μg/mL) of the test endodontic sealers for 24 h, followed by the determination of the survival rate. Statistical Analysis Used: One-way repeated-measures ANOVA and the Newman–Keuls post hoc test were used to compare the different materials as well as different concentrations of the same material. Dunnett's test was used to compare the different concentrations and different sealers to the control. The lethal concentration of each endodontic sealer necessary to kill 50% of the brine shrimp larvae (LC50) was also determined. Results: The toxicity of Bio-C (10, 20, 40, 80, and 100 μg/mL) and Endosequence BC Sealer (20, 80, and 100 μg/mL) was lower than that of AH Plus. No significant difference was found between Bio-C and Endosequence BC Sealer or among the different intragroup concentrations of these sealers. In the AH Plus group, concentrations ≥5.0 μg/mL exhibited greater toxicity compared to the concentration of 2.5 μg/mL and the control. AH Plus had the lowest LC50 (59.95 μg/mL), whereas Bio-C and Endosequence BC Sealer had LC50 values >200 μg/mL. Conclusions: Bio-C Sealer proved to be less toxic than AH Plus and exhibited similar toxicity to that of Endosequence BC Sealer.
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Xiao R, Zhang Y, Wang S, Zhu H, Song H, Chen G, Lin H, Zhang J, Xiong J. Prussian blue modified CeO 2 as a heterogeneous photo-Fenton-like catalyst for degradation of norfloxacin in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:69301-69313. [PMID: 34296409 DOI: 10.1007/s11356-021-15498-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
The heterogeneous photo-Fenton-like process is emerging as a promising treatment of antibiotics-containing wastewater. The preparation of new efficient and stable catalysts is one of the research fields. A composite catalyst, prussian blue (PB) modified CeO2 was prepared, characterized, and applied for photo-Fenton oxidation of norfloxacin (NOR) in this study. It was found that chemical doping of PB leaded to more oxygen vacancies and increased the surface area of CeO2 obviously. PB/CeO2 with more Ce3+ facilitated electron transfer between Fe3+/Fe2+ with Ce3+/Ce4+. PB could also improve the separation rate of photoexcited electron-hole pairs in CeO2 nanostructures. When the doping ratio of PB and CeO2 was 10%, PB/CeO2 show the highest catalytic degradation ability and 88.93% of NOR could be degraded within 30 min. PB/CeO2 composite showed well reactivity at the wide pH value range of 3-8. The reusable experiments and low iron dissolution with less than 1 mg/L indicated that PB/CeO2 could be employed as an efficient heterogeneous photo-Fenton-like catalyst in organic contaminants degradation.
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Affiliation(s)
- Ruyi Xiao
- Guangxi University, Nanning, 530004, China
| | | | - Shuangfei Wang
- Guangxi University, Nanning, 530004, China.
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China.
| | - Hongxiang Zhu
- Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Hainong Song
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Guoning Chen
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Hongfei Lin
- Guangxi BOSSCO Environmental Protection Science and Technology Co., LTD., Nanning, 530004, China
| | - Jian Zhang
- Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
| | - Jianhua Xiong
- Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning, 530004, China
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Emmanouil C, Kungolos A. Environmental Toxicity Assessment: state of the art and future directions in a world of arising threats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:3753-3755. [PMID: 33394407 DOI: 10.1007/s11356-020-11950-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Christina Emmanouil
- School of Spatial Planning and Development, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | - Athanasios Kungolos
- School of Civil Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
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