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Ji X, Challis JK, Brinkmann M. A critical review of diffusive gradients in thin films technique for measuring organic pollutants: Potential limitations, application to solid phases, and combination with bioassays. CHEMOSPHERE 2022; 287:132352. [PMID: 34826958 DOI: 10.1016/j.chemosphere.2021.132352] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Diffusive gradient in thin films (DGT) for organics has received considerable attention for studying the chemical dynamics of various organic pollutants in the environment. This review investigates current limitations of DGT for organics and identifies several research gaps for future studies. The application of a protective outer filter membrane has been recommended for most DGT applications, however, important questions regarding longer lag times due to significant interaction or adsorption of specific groups of compounds on the outer membrane remain. A modified DGT configuration has been developed that uses the diffusive gel as the outer membrane without the use of an extra filter membrane, however use of this configuration, while largely successful, remains limited. Biofouling has been a concern when using DGT for metals; however, effect on the performance of DGT for organics needs to be systemically studied. Storage stability of compounds on intact DGT samplers has been assessed in select studies and that data is synthesized here. DGT has been used to describe the kinetic desorption of antibiotics from soils and biosolids based on the soil/biosolid physical-chemical characteristics, yet applications remain limited and requires further research before wide-scale adoption is recommended. Finally, DGT for organics has been rarely, albeit successfully, combined with bioassays as well as in vivo bioaccumulation studies in zebrafish. Studies using DGT combined with bioassays to predict the adverse effects of environmental mixtures on aquatic or terrestrial biota are discussed here and should be considered for future research.
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Affiliation(s)
- Xiaowen Ji
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Canada
| | | | - Markus Brinkmann
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Canada; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada; Centre for Hydrology, University of Saskatchewan, Saskatoon, Canada.
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Xie H, Dong Y, Chen J, Wang X, Fu M. Development and evaluation of a ceramic diffusive layer based DGT technique for measuring organic micropollutants in seawaters. ENVIRONMENT INTERNATIONAL 2021; 156:106653. [PMID: 34034115 DOI: 10.1016/j.envint.2021.106653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/13/2021] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Diffusive gradients in thin-films (DGT) technique has been well demonstrated as a robust tool for measuring organic micropollutants (OMPs) in the aquatic environment. However, potential adsorption of the OMPs on organic polymer filters and flow rate of waters can affect the measuring results of the DGT method, hence tedious work should be conducted to reduce these interferences. In the present study, a novel DGT technique coupled with a ceramic diffusive layer was developed to measure the OMPs in seawaters. The ceramic diffusive layer exhibited adsorption inertness to the OMPs with various logKow values. Moreover, the ceramic diffusive layer based DGT technique was proved to be less affected by the flow rate than the traditional DGT with agarose diffusive layer. The developed DGT device exhibited kinetic accumulation for the targets during a 6-d deployment, and measurement of the OMPs by the DGT method was independent with pH and ionic strength. Finally, the developed DGT sampler was applied in coastal waters of Dalian, and eight OMPs were detected with levels ranging from 1.58 to 13.1 ng/L. The development of the ceramic diffusive membrane can lead to simplification of the DGT applications, promoting the progress of the OMPs monitoring technology.
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Affiliation(s)
- Huaijun Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
| | - Yingchao Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
| | - Xueling Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
| | - Mao Fu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China
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Tran TAM, Malarvannan G, Hoang TL, Nguyen VH, Covaci A, Elskens M. Occurrence of organochlorine pesticides and polychlorinated biphenyls in sediment and fish in Cau Hai lagoon of Central Vietnam: Human health risk assessment. MARINE POLLUTION BULLETIN 2019; 141:521-528. [PMID: 30955764 DOI: 10.1016/j.marpolbul.2019.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 02/28/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
This is the first study on polychlorinated biphenyls (PCBs) in fish from the Cau Hai lagoon, a part of the largest coastal lagoon in Southeast Asia. Seven selected PCB congeners and organochlorine pesticides in sediments and edible fish tissues were quantified by GC-MS. The sum of ICES-7 PCB and DDTs concentrations in fish species consumed regularly and of economic value were in ranges 26-43 ng g-1 lw and 182-277 ng g-1 lw, respectively. The ratio between the parent DDT compound and the sum of metabolites, DDE and DDD, was most of the time smaller than 1, suggesting primarily an historical contamination of the lagoon. An agglomerative hierarchical clustering indicates sites located in the north-western part of the Cau Hai lagoon were characterized by above-average concentrations of DDE and DDT. Comparing to previous data, a large decrease in ∑DDT residues can be seen over the past 20 years.
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Affiliation(s)
- Thi Ai My Tran
- Analytical, Environmental and Geo-Chemistry Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium; Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue, Hue, Viet Nam.
| | - Govindan Malarvannan
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Thai Long Hoang
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue, Hue, Viet Nam
| | - Van Hop Nguyen
- Department of Chemistry, University of Sciences, Hue University, 77 Nguyen Hue, Hue, Viet Nam
| | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Marc Elskens
- Analytical, Environmental and Geo-Chemistry Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium
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Guo W, Van Langenhove K, Denison MS, Baeyens W, Elskens M, Gao Y. Estrogenic Activity Measurements in Water Using Diffusive Gradients in Thin-Film Coupled with an Estrogen Bioassay. Anal Chem 2017; 89:13357-13364. [PMID: 29151339 DOI: 10.1021/acs.analchem.7b03537] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel type of diffusive gradients in thin-film (DGT) was combined with a chemically activated luciferase gene expression bioassay (CALUX) to measure estrogens in aquatic systems. The performance of this novel method was assessed with 17β-estradiol (E2) as the model steroid hormone, XAD 18 resin gel as the binding phase in the DGT method and VM7Luc4E2 cells (formerly BG1Luc4E2) for the Estrogen Responsive Element (ERE)-CALUX bioassay. The measured effective diffusion coefficient of E2 in agarose diffusive gel was 4.65 ± 0.37 × 10-6 cm2 s-1 at 25 °C. The detection limit of this combined DGT/ERE-CALUX method for 1 day of sampling (0.026 ± 0.003 ng L-1 of E2) is significantly lower than that obtained by spot sampling combined with GC-MS/MS or LC-MS/MS analysis (0.1-7.0 ng L-1). The method is independent of pH (5-8), ionic strength (0.001-0.5 M), and dissolved organic matter (DOM; concentrations up to 30 mg L-1). Field applications of this novel DGT in effluents of three sewage treatment plants in Beijing city (China) showed comparable results to conventional spot (grab) sampling. This study demonstrates that the combined DGT/ERE-CALUX approach is an effective and sensitive tool for in situ monitoring of estrogenic activity in waters and wastewaters.
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Affiliation(s)
- Wei Guo
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB) , Pleinlaan 2, 1050 Brussel, Belgium.,School of Environmental Science and Engineering, North China Electric Power University , Beijing, 102206, China
| | - Kersten Van Langenhove
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB) , Pleinlaan 2, 1050 Brussel, Belgium
| | - Michael S Denison
- Department of Environmental Toxicology, University of California, Davis (UC Davis) , One Shields Avenue, Davis, California 95616, United States
| | - Willy Baeyens
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB) , Pleinlaan 2, 1050 Brussel, Belgium
| | - Marc Elskens
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB) , Pleinlaan 2, 1050 Brussel, Belgium
| | - Yue Gao
- Analytical, Environmental and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB) , Pleinlaan 2, 1050 Brussel, Belgium
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