College of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China.
Marine Ecology Research Center, Ministry of Natural Resources, First Institute of Oceanography, Qingdao, 266061, China.
Environ Sci Pollut Res Int. 2022 Oct;29(46):70542-70551. doi: 10.1007/s11356-022-20752-7. Epub 2022 May 19.
As ubiquitous contaminants in the environment, organophosphorus flame retardants (OPFRs) would eventually settle in marine sediment. In this study, concentrations, spatial distributions, and ecological risks of seven OPFRs in sediment samples of the South China Sea (SCS) were investigated for the first time. Total concentration of all OPFRs ranged from 2.5 to 32.3 ng/g dry weight (dw), in which the abundance of tri-cresyl phosphates (TCPs) was the highest. OPFRs in the SCS were at a medium level compared with those from other parts of the world. The nearshore ocean current, ship transportation, and riverine inputs might influence the spatial distributions of OPFRs. The total inventory of six OPFRs in sediment was estimated to be 202.8 tons (16.7×10 km). The hazard quotient (HQ) of OPFRs ranged from 0 to 3.2E-02, indicating the ignorable ecological risk of OPFRs in sediments of the SCS. This study provides insight into the occurrence of current-use OPFRs in the SCS which deserved long-term concern in the future due to their continuous terrigenous inputs.
作为环境中普遍存在的污染物，有机磷阻燃剂（OPFRs）最终会沉降在海洋沉积物中。本研究首次调查了南海（SCS）沉积物样品中七种 OPFRs 的浓度、空间分布和生态风险。所有 OPFRs 的总浓度范围为 2.5 至 32.3ng/g 干重（dw），其中磷酸三邻甲苯酯（TCPs）的丰度最高。与世界其他地区相比，SCS 中的 OPFRs 处于中等水平。近岸海流、船舶运输和河流输入可能影响 OPFRs 的空间分布。估计 SCS 沉积物中六种 OPFRs 的总存量为 202.8 吨（16.7×10km）。OPFRs 的危害商（HQ）范围为 0 至 3.2E-02，表明 SCS 沉积物中 OPFRs 的生态风险可以忽略不计。本研究深入了解了当前在南海使用的 OPFRs 的存在情况，由于其持续的陆源输入，未来需要长期关注。
