Li Xiaotong, Jiang Su, Zheng Hongyuan, Shi Yali, Cai Minghong, Cai Yaqi
MNR Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Beijing 100085, China.
MNR Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China; School of Oceanography (SOO), Shanghai Jiao Tong University, Shanghai 200030, China.
Sci Total Environ. 2023 Feb 1;858(Pt 3):160011. doi: 10.1016/j.scitotenv.2022.160011. Epub 2022 Nov 8.
Organophosphorus pesticides (OPPs) have raised an increasing public concern due to their harmful impacts. To explore the occurrence and distribution of OPPs in southeastern China marginal seas (SCMS), a sampling campaign was carried out from East China Sea (ECS) to South China Sea (SCS). A total of 33 OPPs are quantified with the ΣOPPs concentrations ranging from 4.73 to 14.15 ng/L. Higher ΣOPPs concentrations in the surface seawater from the estuaries of Yangtze River, Minjiang River, and Pearl River than those at other sampling sites indicates that riverine emissions are the principal sources of OPPs in SCMS. Different compositions of OPPs in ECS and SCS highlight the different priority of use categories for OPPs in China coastal region. In addition, the vertical diffusion and upwelling ocean currents play critical roles in the redistribution of OPPs in SCMS. For the first time, the ΣOPPs mass inventories in surface seawater of ECS and SCS are estimated at 8.51 and 11.26 t, respectively. Although the current ecological risk of OPPs is at low level in surface seawater of SCMS, the long-term use and bio-accumulative potential point to the necessity for the normalized monitoring of OPPs in China.
有机磷农药（OPPs）因其有害影响而日益引起公众关注。为探究中国东南沿海边缘海（SCMS）中OPPs的存在情况和分布规律，开展了一次从东海（ECS）到南海（SCS）的采样活动。共定量检测出33种OPPs，其总浓度范围为4.73至14.15 ng/L。长江口、闽江口和珠江口表层海水中的总OPPs浓度高于其他采样点，这表明河流排放是SCMS中OPPs的主要来源。东海和南海中OPPs的不同组成突出了中国沿海地区OPPs使用类别优先级的差异。此外，垂直扩散和上升洋流在SCMS中OPPs的再分布中起着关键作用。首次估算出东海和南海表层海水中的总OPPs质量存量分别为8.51吨和11.26吨。尽管目前SCMS表层海水中OPPs的生态风险处于低水平，但长期使用和生物累积潜力表明中国有必要对OPPs进行常态化监测。
