Microplastics in the seawater of the Beibu Gulf,the northern South China Sea:occurrence,sources,and ecological risk  

作　　者：Zuhao ZHU Qiongyuan SU Huihua WEI Lang LIN Liangliang HUANG 

机构地区：[1]Guangxi Key Laboratory of Beibu Gulf Marine Resources,Environment and Sustainable Development,Fourth Institute of Oceanography,Ministry of Natural Resources,Beihai 536000,China [2]Key Laboratory of Tropical Marine Ecosystem and Bioresource,Fourth Institute of Oceanography,Ministry of Natural Resources,Beihai 536000,China [3]College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541004,China [4]Key Laboratory of Tropical Marine Bio-resources and Ecology,Guangdong Provincial Key Laboratory of Applied Marine Biology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China [5]Sanya Institute of Ocean Eco-Environmental Engineering,Sanya 572100,China

出　　处：《Journal of Oceanology and Limnology》2025年第2期406-421,共16页海洋湖沼学报(英文)

基　　金：Supported by the National Natural Science Foundation of China(No.U20A20103);the Scientific Research Fund of the Fourth Institute of Oceanography;Guangxi Funding Project(No.304024XM20N0006);the Guangxi Talent Science and Technology Project(No.2019AC17008)。

摘　　要：In this study,the occurrence,sources,and ecological risk of microplastics(>60μm)in the surface and bottom seawater were investigated in the Beibu Gulf,the northern South China Sea.The average abundance of microplastics in surface and bottom waters was 1.35±0.93 and 0.79±0.50 items/m~3,respectively.Microplastics in both surface and bottom waters were predominantly in the form of fragments,and mostly in green.The composition of microplastics in surface water was primarily poly(methyl methacrylate)(PMA),whereas in bottom water,polyethylene(PE)dominated.Positive matrix factorization(PMF)modeling revealed that the primary sources of microplastics were pipeline abrasion,fishing activities,plastic waste,landfill disposal,transportation,aquaculture,and construction activities.The pollution load index(PLI)indicated that the overall risk of microplastic pollution in the Beibu Gulf was low.Conversely,the polymer hazard index(PHI)for microplastics was relatively high.These data underscore the importance of timely and effective reduction of human-intensive activities contributing to microplastic pollution and provide valuable information for further research in microplastic ecotoxicology and biogeochemistry.

关 键 词：microplastic seawater SOURCE ecological risk Beibu Gulf 

分 类 号：X55[环境科学与工程—环境工程]