Estuarine plastic dynamics: Analyzing export patterns from a typical semi-enclosed bay in Asia
文献类型： 外文期刊
作者： Wei, Nian 1 ; Lu, Jungang 1 ; Jiao, Meng 1 ; Zong, Changxing 1 ; Zhang, Feng 1 ; Jiang, Chunhua 1 ; Zhu, Lixin 1 ; Liu, Kai 1 ; Cui, Tiefeng 1 ; Li, Daoji 1 ;
作者机构： 1.East China Normal Univ, State Key Lab Estuarine & Coastal Res, 500 Dongchuan Rd, Shanghai 200062, Peoples R China
2.IOC UNESCO, Reg Training & Res Ctr Plast Marine Debris & Micro, Shanghai 200241, Peoples R China
3.East China Normal Univ, Hainan Res Inst, Sanya 572025, Peoples R China
4.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, 300 Jungong Rd, Shanghai 200090, Peoples R China
5.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, England
关键词： Microplastic (MPs); Spatial distribution; Principal Coordinate Analysis (PCoA); Semi-enclosed bays; Hydrodynamic processes; Pollution management
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0304-3894
年卷期： 2025 年 492 卷
页码：
收录情况： SCI
摘要： Semi-enclosed estuarine systems are recognized as hotspots for microplastic (MP) pollution, yet their export dynamics remain poorly understood. This study investigates the distribution of microplastics (<5 mm) and macroplastics (>5 mm) in Sanya Bay, a typical semi-enclosed bay in southern China. Based on 45 surface water samples, MP concentrations ranged from 0.298 to 4.010 items/m(3) (mean: 1.628 +/- 1.055), significantly higher than macroplastics (mean: 0.109 +/- 0.338 items/m(3)). Most particles were fragments smaller than 5 mm, dominated by white, green, and transparent colors. The main polymers identified were polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET). A "dual-center" pattern was observed: low-density plastics (e.g., PP, PE) accumulated near river mouths and offshore islands, while high-density plastics (e.g., PET, PVC) settled in estuarine zones. Principal Coordinate Analysis (PCoA) revealed spatial clustering across estuarine, coastal, and offshore areas, influenced by land-based inputs, human activity, and hydrodynamic transport. This study provides new insights into plastic transport mechanisms in semi-enclosed bays and highlights the importance of integrating plastic properties with environmental forces. The findings support targeted pollution management in similar coastal environments.
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