Distribution, sources, and eco-risk of Current-Use Pesticides (CUPs) in the coastal waters of the northern Shandong Peninsula, China

Zhijian Cao; Yunhao Ding; Lihong Zhang; Jian Zhang; Lin Liu; Minghong Cai; Jianhui Tang

doi:10.1016/j.marpolbul.2024.116159

Distribution, sources, and eco-risk of Current-Use Pesticides (CUPs) in the coastal waters of the northern Shandong Peninsula, China

Mar Pollut Bull. 2024 Apr:201:116159. doi: 10.1016/j.marpolbul.2024.116159. Epub 2024 Feb 15.

Authors

Zhijian Cao¹, Yunhao Ding², Lihong Zhang³, Jian Zhang⁴, Lin Liu⁵, Minghong Cai⁶, Jianhui Tang⁷

Affiliations

¹ College of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, CAS, Yantai 264003, China.
² Ministry of Natural Resources Key Laboratory for Polar Science, Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200136, China.
³ School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China.
⁴ Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, CAS, Yantai 264003, China.
⁵ School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, China.
⁶ Ministry of Natural Resources Key Laboratory for Polar Science, Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200136, China. Electronic address: caiminghong@pric.org.cn.
⁷ Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, CAS, Yantai 264003, China; School of Marine Science, Beibu Gulf University, Qingzhou 535011, China. Electronic address: jhtang@yic.ac.cn.

PMID: 38364526
DOI: 10.1016/j.marpolbul.2024.116159

Abstract

This study investigated the spatial distributions and seasonal variations of 19 CUPs in the coastal areas of the Shandong Peninsula and its surrounding rivers and assessed their ecological risk. In freshwater and seawater, insecticides (chlorpyrifos, methoxychlor, and pyridaben), as well as fungicides (fenarimol) and herbicides (dichlobenil) were the main pollutants (Detection Frequency: 100 %). Spatially, during winter, the regional pollution levels of Σ₁₉CUPs in seawater showed a trend of Laizhou Bay (LZB, mean:4.13 ng L^-1) > Yellow River Estuary (YRE, mean:2.57 ngL^-1) > Bohai Bay (BHB, mean:2.21 ng L^-1) > Yanwei Area (YWA, mean:1.94 ng L^-1). The similarities of major substances between rivers and the marine environment suggest that river discharge is the main source of CUPs pollution in coastal areas. In summer, CUPs in rivers posed a high risk. In winter, the risk significantly decreased, indicating a moderate overall risk. Seawater exhibited a low risk in winter.

Keywords: Current-use pesticides (CUPs); Ecological risk; Seasonal variations; Shandong Peninsula coastal waters.

MeSH terms

China
Chlorpyrifos*
Environmental Monitoring
Estuaries
Pesticides* / analysis
Rivers
Seawater
Water Pollutants, Chemical* / analysis

Substances

Pesticides
Water Pollutants, Chemical
Chlorpyrifos