College of Environmental Science and Engineering, Qingdao University, 266071, Qingdao, China.
Marine Ecology Research Center, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China.
Environ Pollut. 2022 Jun 1;302:119017. doi: 10.1016/j.envpol.2022.119017. Epub 2022 Feb 19.
Organophosphates (OPEs) are manmade organic pollutants that are widely used as flame retardants, plasticizers, and antifoaming and hydraulic agents. In this study, seven OPEs in seawater and sediment from the Yellow Sea and East China Sea were determined to study the distribution and diffusion behavior, and to evaluate the environmental risks. The ΣOPEs in the seawater and sediments ranged from below the method detection limit (<MDL) to 497.40 ng/L and from < MDL to 66.50 ng/g dw, respectively. Tri-n-butyl phosphate (TnBP), tris-(1, 3-Dichloro-2-Propyl) phosphate (TDCPP), and tri-meta-cresyl phosphate (TmCP) were the dominant OPEs in the seawater and sediments. OPEs were mainly distributed in coastal areas and the South Yellow Sea, indicating that they are mainly affected by land-based pollution and ocean currents. Fugacity analysis shows that tri-para-cresyl phosphate (TpCP) was in a state of equilibrium, while TDCPP, TnBP, and TmCP other OPEs tended to diffuse from sediment to water. The diffusion behavior of OPEs is mainly affected by their chemical properties. Hazard quotient (HQ) values of TmCP and TpCP in sediment samples were >1.0, indicating high ecological risks to aquatic organisms.
有机磷化合物（OPEs）是广泛用作阻燃剂、增塑剂、消泡剂和液压剂的人造有机污染物。本研究测定了黄海和东海海水中和沉积物中的 7 种 OPEs，以研究其分布和扩散行为，并评估环境风险。海水中和沉积物中的ΣOPEs 含量范围分别为低于方法检测限（<MDL）至 497.40ng/L 和 <MDL 至 66.50ng/g dw。三正丁基磷酸酯（TnBP）、三（1,3-二氯-2-丙基）磷酸酯（TDCPP）和三邻甲苯基磷酸酯（TmCP）是海水中和沉积物中主要的 OPEs。OPEs 主要分布在沿海地区和南黄海，表明它们主要受到陆源污染和洋流的影响。逸度分析表明，三对甲苯基磷酸酯（TpCP）处于平衡状态，而 TDCPP、TnBP 和 TmCP 等其他 OPEs 则倾向于从沉积物向水中扩散。OPEs 的扩散行为主要受其化学性质影响。沉积物样品中 TmCP 和 TpCP 的危害商（HQ）值均>1.0，表明对水生生物具有高生态风险。
