Diffusive gradients in thin-films (DGT) for in situ measurement of neonicotinoid insecticides (NNIs) in waters
文献类型： 外文期刊
作者： Xiong, Junwu 1 ; Pu, Chang 3 ; Qian, Zhe 3 ; Yi, Jiapei 1 ; Wang, Kang 1 ; Zhang, Chi 1 ; Liu, Wei 5 ; Chen, Wei 1 ; Xu, Li 4 ; Qi, Shihua 1 ; Zhang, Zulin 8 ; Zhang, Hao 7 ; Jones, Kevin C. 7 ;
作者机构： 1.China Univ Geosci, Sch Environm Studies, Wuhan 430078, Peoples R China
2.China Univ Geosci, MOE Key Lab Groundwater Qual & Hlth, Wuhan 430078, Peoples R China
3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430078, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol, Beijing 100097, Peoples R China
5.China Univ Geosci, Inst Geol Survey, Wuhan 430074, Peoples R China
6.Hubei Geol Bur, Hubei Key Lab Resources & Ecoenvironm Geol, Wuhan 430034, Peoples R China
7.Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England
8.James Hutton Inst, Aberdeen AB15 8QH, Scotland
关键词： Neonicotinoid insecticides (NNIs); Passive sampling; Diffusive gradients in thin-films (DGT); Groundwater; Wastewater
期刊名称：WATER RESEARCH （ 影响因子：12.4； 五年影响因子：12.9 ）
ISSN： 0043-1354
年卷期： 2025 年 269 卷
页码：
收录情况： SCI
摘要： Neonicotinoid insecticides (NNIs) are among the most widely-used insecticides, although their threat to non- target organisms has attracted attention in recent years. In this study, a diffusive gradient in thin-films (DGT) passive sampling technique was developed for in situ monitoring of time-weighted average (TWA) concentrations of NNIs in groundwater and wastewater. Systematic studies demonstrated that DGT with HLB as binding gels (HLB-DGT) is suitable for quantitative sampling of NNIs under a wide range of conditions, independent of pH (5-9.5), ionic strength (0.001-0.5 M) and dissolved organic matter (0-10 mg/L). The HLB-DGT performance was also independent of the typical groundwater ionic environments. The thicknesses of in-situ measured diffusive boundary layer were 0.35 and 0.25 mm in the groundwater and effluent, respectively. HLB-DGT can provide TWA concentrations over 14-18 days' deployment with linear uptake in both groundwater and wastewater. Concentrations and occurrence patterns of NNIs obtained by HLB-DGT were consistent with those measured from grab samples. The median TWA concentration of NNIs was 4.42 ng/L in water from the largest urban lake of China (the Tangxun Lake) in winter, with wastewater discharge being the main potential source. The reliability and stability of the HLB-DGT for measuring NNIs in the groundwater and surface water were confirmed and can be used to improve understanding of the occurrence and fate of NNIs in aquatic environment.
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