Application of diffusive gradients in thin-films for in-situ monitoring of nitrochlorobenzene compounds in aquatic environments
Application of diffusive gradients in thin-films for in-situ monitoring of nitrochlorobenzene compounds in aquatic environments
复制标题
薄膜扩散梯度在水生环境中硝基氯苯化合物原位监测中的应用
DOI：
10.1016/j.watres.2019.03.092
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发表时间：
2019
期刊：
影响因子：
12.8
通讯作者：
Li Aimin
中科院分区：
文献类型：
--
作者：
Zhang Delin;Zhu Yuanting;Xie Xianchuan;Han Chao;Zhang Hao;Zhou Lijun;Li Meng;Xu Guizhou;Jiang Lu;Li Aimin
Nitrochlorobenzene compounds (NCBs) are of key interest in environmental monitoring due to their high toxicity. To better understand the presence and fate of NCBs in aquatic environments, anin-situsampling technique of diffusive gradients in thin films (DGT) based on hydrophilic-lipophilic-balanced (HLB) resin, combined with gas chromatography, was developed to measure four typical NCBs, e.g. meta-chloronitrobenzene (MNCB), para-chloronitrobenzene (PNCB), ortho-chloronitrobenzene (ONCB), and 2,4-dinitrochlorobenzene (CDNB). The diffusion coefficients of MNCB, PNCB, ONCB, and CDNB in agarose-based gel were firstly determined in diffusion cell experiments and ranged from 7.19 × 10−6to 7.49 × 10−6cm/s. The capacities of HLB-DGT for MNCB, PNCB, ONCB, and CDNB were higher than 114.65, 117.52, 117.72, and 37.58 μg/cm2, respectively. The HLB-DGT performance on NCBs determination was demonstrated to be independent of natural fluctuations in pH (3–9), ionic strength (0.001–0.5 M), and dissolved organic matter concentrations (0–20 mg/L) and of deployment time (0–120 h). In the field application, the DGT-based method to measure NCBs not only proved to be accurate and effective, but also performed better than the grab sampling method under the variable conditions. This study demonstrates that the newly developedin-situmethod based on DGT can provide an attractive alternative for the routine monitoring of NCBs in aquatic environments.
