Assessment of spatial distribution,sources,and ecological risks of microplastics in the estuarine and coastal regions of the northern Bay of Bengal  

作　　者：Md Mazharul ISLAM Jun WANG A B M Sadique RAYHAN Junge WANG Sultan Al NAHIAN Jingwen SHI Bin CHEN Hongwei KE Chunhui WANG Minggang CAI 

机构地区：[1]Coastal and Ocean Management Institute,Xiamen University,Xiamen 361102,China [2]State Key Laboratory of Marine Environmental Science,Xiamen University,Xiamen 361102,China [3]College of Environment and Ecology,Xiamen University,Xiamen 361102,China [4]College of Ocean and Earth Science,Xiamen University,Xiamen 361102,China [5]Department of Marine Biology,Xiamen Ocean Vocational College,Xiamen 361102,China [6]Key Laboratory of Estuarine Ecological Security and Environmental Health,Education Department of Fujian,Tan Kah Kee College,Xiamen University,Zhangzhou 363105,China [7]Department of Environmental Science and Engineering,Tan Kah Kee College,Xiamen University,Zhangzhou 363105,China [8]Department of Navigation,Marine Fisheries Academy,Chittagong 4000,Bangladesh [9]Environmental Oceanography and Climate Division,Bangladesh Oceanographic Research Institute,Cox’s Bazar 4730,Bangladesh

出　　处：《Journal of Oceanology and Limnology》2025年第2期474-491,共18页海洋湖沼学报(英文)

基　　金：Supported by the National Natural Science Foundation of China(NSFC)Shared Voyage Project(Nos.41776088,41976018,42049911,U20A20103,U2005207);the Natural Science Key Foundation of Fujian Province,China(No.2020J01412103);the Hainan Province Science and Technology Special Fund(No.ZDYF2022SHFZ317);the Guangxi Talent and Innovation Base Project(No.2018AD19280);the Guangxi Funding Project(No.04024XM20N0006);the Beihai Science&Technology Project(Nos.201995037,202082031,202082022);the Natural Science Foundation of Xiamen City of China(No.502Z20227322);the China Scholarship Council(CSC Marine Scholarship)。

摘　　要：Microplastics(MPs)have recently emerged as a significant environmental problem with devastating consequences for organisms.Understanding MPs pollution in the Bay of Bengal is crucial for assessing its ecological impact on marine biodiversity and human health.This study examined the occurrence,spatial distribution,physical and chemical properties,ecological risks,and probable sources of MPs in estuarine and coastal marine environments in the northeastern Bay of Bengal.The average concentration of MPs in surface water of the Karnaphuli estuary,the Meghna estuary,and the southeastern coastal region were 916.7±462.6 items/m^(3),462.9±324.5 items/m^(3),and 350.0±190.5 items/m^(3),respectively,varying from 105.0±324.5 items/m^(3)to 1640.0±462.6 items/m^(3).In the sediments of the Karnaphuli estuary,the Meghna estuary,and the southeast coast of Bangladesh,the average amount of MPs were 94.3±33.1 items/kg,157.6±89.0 items/kg,and 134.3±38.7 items/kg,with a range of 60±33.1 items/kg to 334.3±89.0 items/kg.Most observed MPs were fibers(60.0%in the water;56.0%in the sediments),followed by fragments and lines.Detected MPs were dominated by polypropylene(20.7%)in the water,and acrylic(15.4%)in the sediment,black colored(76.2%in the water,72.7%in the sediments),and 200-500μm sized(48%in the water,37%in the sediments).Pollution Risk Index(PRI)indicated significant pollution levels(from medium to very high)in estuarine and coastal areas.Multi-statistical analysis indicated land-based inputs(tourists,local waste,agriculture,and industry)dominated the studied regions.The study emphasized the potential impact of MPs pollution on aquatic ecosystems,emphasizing the need for effective management,mitigation methods,continuous surveillance,and thorough evaluation.

关 键 词：microplastic(MP) pollution risk assessment polymer variety Bay of Bengal Karnaphuli estuary Meghna estuary 

分 类 号：X55[环境科学与工程—环境工程] X820.4