Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, South China Normal University, Guangzhou 510006, China; School of Environment, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, China.
Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United Kingdom.
Environ Int. 2020 Oct;143:105936. doi: 10.1016/j.envint.2020.105936. Epub 2020 Jul 10.
The occurrence of endocrine disrupting chemicals (EDCs) in the aquatic environment is a global concern. In this study, we employed two different passive samplers Diffusive Gradients in Thin-films (DGT) and Chemcatcher for in situ measurement of 8 phenolic EDCs in the East River of the Pearl River system over one-year. These data were assessed alongside results from traditional grab sampling. Six chemicals (4tOP, 4NP, BPA, E1, EE2 and DES) were regularly detected in the water samples, of which the three phenols (i.e. 4tOP, 4NP and BPA) were in all samples and at high concentrations (0.4-1040 ng/L for 4tOP, 2.6-58500 ng/L for NP and 11.4-123300 ng/L for BPA). Fewer target chemicals were detected in both passive samplers, with only 4tOP, 4NP and BPA found in most samplers; E1 and DES were occasionally measurable above detection limits. The higher (by about a factor of 2-3) measurements provided by DGT compared to Chemcatcher could be attributed to the effect of the diffusive boundary layer on Chemcatcher uptake or the strong adsorption of target chemicals on the Chemcatcher PES filter. The temporal trends of EDC monthly loadings indicated that they were from different sources and that WWTPs were not effective in EDC removal and/or there was still some untreated wastewater discharged into the rivers.
环境内分泌干扰物（EDCs）在水生环境中的出现是一个全球性的问题。在本研究中，我们采用了两种不同的被动采样器——扩散梯度薄膜（DGT）和 Chemcatcher，对珠江水系东江上一年中 8 种酚类 EDCs 进行了原位测量。这些数据与传统的随机取样结果一起进行了评估。在水样中定期检测到六种化学物质（4tOP、4NP、BPA、E1、EE2 和 DES），其中三种酚类（即 4tOP、4NP 和 BPA）在所有样品中均有检出，且浓度较高（4tOP 为 0.4-1040ng/L，NP 为 2.6-58500ng/L，BPA 为 11.4-123300ng/L）。两种被动采样器都检测到较少的目标化学物质，只有 4tOP、4NP 和 BPA 出现在大多数采样器中；E1 和 DES 偶尔可以在检出限以上测量到。DGT 提供的测量值（比 Chemcatcher 高约 2-3 倍）可能归因于扩散边界层对 Chemcatcher 吸收的影响，或者目标化学物质对 Chemcatcher PES 过滤器的强烈吸附。EDC 月负荷的时间趋势表明它们来自不同的来源，且 WWTP 对 EDC 的去除效果不佳，或者仍有未经处理的废水排入河流。
