[口头报告]Organophosphate esters in the mariculture ecosystem: Environmental occurrence and risk assessments

Organophosphate esters in the mariculture ecosystem: Environmental occurrence and risk assessments
编号:2836 稿件编号:2412 访问权限:私有 更新:2023-05-03 23:14:44 浏览:306次 口头报告

报告开始:2023年05月08日 10:25 (Asia/Shanghai)

报告时间:15min

所在会议:[6A] 6A、海洋地球科学 » [6A-4] 6A-4 海洋地球科学

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摘要
Most investigations on organophosphate esters (OPEs) are conducted predominantly in a separate biological or abiotic medium, and few joint analyses have been performed in the mariculture ecosystem based on yearly sampling. Herein, we investigated the occurrence, load estimation, phase distribution, source diagnostics, and risks of 20 OPEs in seawater, sediment, and aquaculture organisms from a typical mariculture area in China. The total of these OPEs (∑OPEs) ranged within 3.97–1068 ng/L, 0.39–65.5 ng/g (dw), and 4.09–16.3 ng/g (ww) in seawater, sediment and organisms, respectively. Chlorinated OPEs were the predominant congeners detected in seawater, whereas alkyl-OPEs were the leading contributors in sediment and biological samples. Seasonal variations of ∑OPEs in seawater were more distinct than those in sedimentary environments. Load estimation indicated that approximately 70% of the OPEs in the study area existed in the water bodies. Source identification performed using the U.S. EPA positive matrix factorization indicated that polyurethane foam/plastics and hydraulic oil made the greatest contributions in seawater, whereas chemical production was the predominant source in sediment. Indices of ecological and health risks of OPEs were lower than their risk threshold, indicating that the OPEs detected in this study posed a low risk to the aquatic environment and human health.
关键字
Organophosphate Esters; Contamination Characteristic; Source Diagnostics; Risk Assessment; Mariculture Environment
报告人
张泽明
副教授 宁波大学

稿件作者
张泽明 宁波大学
史西志 宁波大学
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