Organophosphorus pesticides in southeastern China marginal seas: Land-based export and ocean currents redistribution

Xiaotong Li; Su Jiang; Hongyuan Zheng; Yali Shi; Minghong Cai; Yaqi Cai

doi:10.1016/j.scitotenv.2022.160011

Organophosphorus pesticides in southeastern China marginal seas: Land-based export and ocean currents redistribution

Sci Total Environ. 2023 Feb 1;858(Pt 3):160011. doi: 10.1016/j.scitotenv.2022.160011. Epub 2022 Nov 8.

Authors

Xiaotong Li¹, Su Jiang², Hongyuan Zheng³, Yali Shi⁴, Minghong Cai⁵, Yaqi Cai⁶

Affiliations

¹ 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.
² 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. Electronic address: jiangsu@pric.org.cn.
³ MNR Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China.
⁴ State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China. Electronic address: shiyali@rcees.ac.cn.
⁵ 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.
⁶ State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Beijing 100085, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.

PMID: 36356779
DOI: 10.1016/j.scitotenv.2022.160011

Abstract

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.

Keywords: Ecological risk; Insecticide; Mass inventories; Ocean pollution; Source apportionment.

MeSH terms

China
Organophosphorus Compounds
Pesticides*

Substances

Pesticides
Organophosphorus Compounds