Spatial distribution, partitioning, and ecological risk assessment of benzotriazoles, benzothiazoles, and benzotriazole UV absorbers in the eastern shelf seas of China.
Spatial distribution, partitioning, and ecological risk assessment of benzotriazoles, benzothiazoles, and benzotriazole UV absorbers in the eastern shelf seas of China.
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DOI：
10.1016/j.watres.2023.120885
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发表时间：
2023-11
期刊：
影响因子：
12.8
通讯作者：
Ming-Liang Zhao;Xuan Ji;Zhen He;Gui-Peng Yang
中科院分区：
文献类型：
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作者：
Ming-Liang Zhao;Xuan Ji;Zhen He;Gui-Peng Yang
苯并三唑（BTRs）、苯并噻唑（BTHs）和苯并三唑类紫外线稳定剂（BUVs）由于其在环境中的普遍存在、毒性和潜在的生态风险而引起越来越多的关注。然而，关于它们在海洋中的分布情况的资料很少。本研究首次对黄海和东海表层海水、海表微层、悬浮颗粒物和沉积物中的BTR、BTH和BUV进行了测定。YS和ECS中BTRs、BTHs和BUVs的空间分布均呈现出近海递减的趋势，表明陆源输入对它们的分布有重要影响。测定了目标污染物在表层海水-SPM（3.06-4.16 L/g）和底层海水-沉积物（2.55-4.82 L/kg）体系中有机碳的归一化分配系数（logKoc）。SPM对大多数目标污染物的吸附能力比沉积物大。BTH，BTRs，和BUVs从SPM到表层沉积物的埋藏能力进行了评估，使用各自的logKow值和它们在YS和ECS的沉积通量进行了量化。BTRs、BTHs和BUVs均在SML中富集，但悬浮颗粒相的富集程度明显低于溶解相。采用风险商数（RQ）法对BTRs、BTHs和BUVs的生态风险进行了评价，结果表明，BTRs、BTHs和BUVs在整个水相中对水生生物没有毒性风险，但在近岸沉积物中具有较高的风险。
Benzotriazoles (BTRs), benzothiazoles (BTHs), and benzotriazole UV stabilizers (BUVs) have attracted increasing attention due to their ubiquity in the environment, toxicity, and potential ecological risks. However, information on their distributions in the ocean is scarce. In this study, BTRs, BTHs, and BUVs were firstly determined in the surface seawater, sea-surface microlayer (SML), suspended particulate matter (SPM), and sediments of the Yellow Sea (YS) and East China Sea (ECS). The spatial distributions of BTRs, BTHs, and BUVs in the YS and ECS showed offshore decreasing trend in their concentrations, indicating that terrestrial inputs from runoff and rivers had important influences on their distributions. The organic carbon normalized partition coefficients (logKoc) of target contaminants in surface seawater-SPM (3.06–4.16 L/g) and bottom seawater-sediment (2.55–4.82 L/kg) systems were determined. SPM showed greater sorption capacities for most target contaminants than the sediment. The burial capacities of BTHs, BTRs, and BUVs from SPM to surface sediments were evaluated using their respective logKowvalues and their sedimentary fluxes in the YS and ECS were quantified. BTRs, BTHs, and BUVs were enriched in the SML, with the enrichment extents of the suspended particulate phase being obviously lower than those of the dissolved phase. The ecological risks of BTRs, BTHs, and BUVs were evaluated using the risk quotient (RQ) method, which showed no toxic risk to aquatic organisms throughout the water phases, but high risk in nearshore sediments.