太湖周边水厂原水中有机磷酸酯的赋存状况及处理效果

Occurrence and Treatment Effect of Organophosphate Esters in Raw Water of WTPs in Surrounding Areas of Taihu Lake

目前,有机磷酸酯(organophosphate esters, OPEs)已在各类环境介质中被普遍检出。由于亲脂性,进入水环境中的OPEs易在水生生物体内富集,并通过食物链放大后造成危害。文中选取太湖周边典型水厂,检测分析水厂原水中OPEs的赋存特征,并考察水处理工艺段对OPEs的处理效果。结果表明,太湖周边水体中11种OPEs的总含量为48.7~1 100 ng/L,且整体呈现“西南低东北高”的特点。研究的水处理工艺段对超过半数的OPEs产生一定的去除效果,但去除效率因物质而异。该结果有望为深入了解太湖流域饮用水中OPEs的来源、环境行为及最终归趋提供科学依据。

Currently, organophosphate esters(OPEs) are widely detected in environment. However, due to strong lipophilicity, OPEs are prone to undergo bioaccumulation and biomagnification in aquatic organisms after entering water environment, and then cause harm. In this study, water treatment plants(WTPs) in surrounding area of Taihu Lake were selected. The concentration and composition characteristics of 11 target OPEs in raw water of WTPs were analyzed, and the treatment effects of OPEs in main water treatment processes were investigated. Results showed that the concentration of target OPEs in the surface water of Taihu Lake and its surrounding waters were in the range of 48.7~1 100 ng/L. Geographically, target OPEs in surface waters of Taihu Lake and its vicinity showed a characteristic of “low in southwest and high in northeast”. Studied WTPs showed a certain removal effect on more than half amount of target OPEs, but removal efficiency varied from substance to substance. Results are expected to provide a scientific basis for in-depth understanding of source, environmental behavior and eventual fate of OPEs in drinking water of Taihu Lake.