Diffusive gradients in thin-films (DGT) for in situ sampling of selected endocrine disrupting chemicals (EDCs) in waters
文献类型： 外文期刊
作者： Chen, Wei 1 ; Pan, Suhong 2 ; Cheng, Hao 1 ; Sweetman, Andrew J. 1 ; Zhang, Hao 1 ; Jones, Kevin C. 1 ;
作者机构： 1.Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
3.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
4.Hong Kong Baptist Univ, Dept Chem, State Key Lab Environm & Biol Anal, Kowloon Tong, Hong Kong, Peoples R China
关键词： Passive sampling; Diffusive gradients in thin-films (DGT); Wastewater; Water framework directive; Water quality; Monitoring
期刊名称：WATER RESEARCH （ 影响因子：11.236； 五年影响因子：11.547 ）
ISSN： 0043-1354
年卷期： 2018 年 137 卷
页码：
收录情况： SCI
摘要： A passive water sampler based on the diffusive gradients in thin-films (DGT) technique was developed and tested for 3 groups of endocrine disrupting chemicals (EDCs, including oestrogens, alkyl-phenols and bisphenols). Three different resins (hydrophilic-lipophilic-balanced (HLB), XAD18 and Strata-XL-A (SXLA)) were investigated for their suitability as the binding phase for DGT devices. Laboratory tests across a range of pH (3.5-9.5), ionic strength (0.001-0.5 M) and dissolved organic matter concentration (0-20 mg L-1) showed HLB and XAD18-DGT devices were more stable compared to SXLA-DGT. HLB-DGT and XAD18-DGT accumulated test chemicals with time consistent with theoretical predictions, while SXLA-DGT accumulated reduced amounts of chemical. DGT performance was also compared in field deployments up to 28 days, alongside conventional active sampling at a wastewater treatment plant Uptake was linear to the samplers over 18 days, and then began to plateau/decline, indicating the maximum deployment time in those conditions. Concentrations provided by the DGT samplers compared well with those provided by auto-samplers. DGT integrated concentrations over the deployment period in a way that grab-sampling cannot. The advantages of the DGT sampler over active sampling include: low cost, ease of simultaneous multi-site deployment, in situ analyte pre-concentration and reduction of matrix interferences compared with conventional methods. Compared to other passive sampler designs, DGT uptake is independent of flow rate and therefore allows direct derivation of field concentrations from measured compound diffusion coefficients. This passive DGT sampler therefore constitutes a viable and attractive alternative to conventional grab and active water sampling for routine monitoring of selected EDCs. (C) 2018 Elsevier Ltd. All rights reserved.
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