State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Marine Sciences, Ningbo University, Ningbo, 315211, China; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, PR China.
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Marine Sciences, Ningbo University, Ningbo, 315211, China; School of Marine Sciences, Ningbo University, Ningbo, 315211, PR China.
Environ Pollut. 2021 Feb 15;271:116362. doi: 10.1016/j.envpol.2020.116362. Epub 2020 Dec 22.
Atrazine (ATR) is one of the most commonly used herbicides that could directly impair the growth and health of organisms in mariculture areas and adversely affect human health through the food chain. This study investigated the contaminant occurrence, migration, and transformation of ATR and three of its chlorinated metabolites, namely deethylatrazine (DEA), deisopropylatrazine (DIA), and didealkylatrazine (DDA), in surface seawater, sediment, and aquatic organisms from the Xiangshan Harbor. ATR was detected in all samples, while DIA and DDA were only respectively detected in aquatic and seawater samples. The distribution of ATR and its metabolites presented different patterns depending on the geographic location and showed a higher level in the aquaculture area than that in the non-aquaculture area. The bioaccumulation of ATR in aquaculture organisms showed that benthic organisms, such as Ditrema, and Sinonovacula constricta (Sin), had increased levels. The ecological risks indicated that ATR posed medium or high risks to algae in the water phase of the study area. The microcosm experiment showed that the main fate of ATR in the simulated microenvironment was sedimentation, which followed the first-order kinetic equation. The ATR in the sediment could be enriched 3-5 times in Sin, and its major metabolites were DEA and DIA.
莠去津（ATR）是一种最常用的除草剂之一，它可能直接损害水产养殖区的生物生长和健康，并通过食物链对人类健康产生不利影响。本研究调查了莠去津及其三种氯化代谢物（即去乙基莠去津（DEA）、去异丙基莠去津（DIA）和双去烷基莠去津（DDA））在象山港海水、沉积物和水生生物中的污染物发生、迁移和转化情况。所有样品中均检测到莠去津，而 DIA 和 DDA 仅分别在水生和海水中样品中被检测到。ATR 和其代谢物的分布呈现出不同的模式，这取决于地理位置，并在水产养殖区的水平高于非水产养殖区。ATR 在水产养殖生物中的生物累积表明，底栖生物，如 Ditrema 和 Sinonovacula constricta（Sin），具有更高的水平。生态风险表明，ATR 对研究区域水相中藻类构成中或高风险。微宇宙实验表明，ATR 在模拟微环境中的主要归宿是沉降，遵循一级动力学方程。沉积物中的 ATR 可以在 Sin 中富集 3-5 倍，其主要代谢物是 DEA 和 DIA。
