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Extended application of diffusive gradients in thin films (DGT) in assessing arsenic bioavailability and human health risks in brownfield soils

文献类型： 外文期刊

作者： Liu, Ying 1 ; Tu, Chen 1 ; Wei, Jing 4 ; Li, Yuan 3 ; Chen, Changer 5 ; Xu, Li 7 ; Mao, Meng 2 ; Luo, Yongming 1 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China

2.China Agr Univ, Coll Land Sci & Technol, Key Lab Arable Land Conservat North China, Minist Agr, Beijing 100193, Peoples R China

3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China

4.Minist Ecol & Environm, Nanjing Inst Environm Sci, State Environm Protect Key Lab Soil Environm Manag, Nanjing 210046, Peoples R China

5.South China Normal Univ, Environm Res Inst, Sch Environm, Guangdong Prov Key Lab Chem Pollut & Environm Safe, Guangzhou 510006, Peoples R China

6.South China Normal Univ, MOE Key Lab Theoret Chem Environm, Guangzhou 510006, Peoples R China

7.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing 100097, Peoples R China

关键词： DGT; Arsenic; Bioavailability; Brownfield soils; Health risk assessment

期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.1； 五年影响因子：6.9 ）

ISSN： 2352-1864

年卷期： 2023 年 32 卷

页码：

收录情况： SCI

摘要： The environmental and human health risks of arsenic (As) mainly depend on its bioavailability in the soil. However, precise determination of bioavailable As in situ is still challenging due to the complexity of soil types and hydrogeological conditions in polluted sites. Diffusive gradients in thin films (DGT) is one of the reliable analysis technology in the in situ analysis of bioavailable chemicals in waters, sediments and farmland soils. However, few studies have investigated the application of DGT in evaluating the bioavailability of heavy metals in brownfield soils. In this study, DGT was extended applied to evaluate the availability of As in 16 contaminated soil samples from seven brownfield sites. The correlation between the bioavailable As measured by DGT and the bioaccessible As determined by the Unified BRAGE method (UBM) assay was also analyzed. In addition, the human health risks were evaluated, and the DGT-based prediction model for bioavailable As was also developed (R2 = 0.852, P < 0.001). The results indicated that considering bioavailability in risk assessments can improve the accuracy of calculations for site-specific health risks and provide guidance for effective remediation. The study will demonstrate the effectiveness of DGT in characterizing bioavailable heavy metals in contaminated site soils and provide decision-making support for the soil remediation.(c) 2023 The Authors. Published by Elsevier B.V.

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