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Fate, source and mass budget of sedimentary microplastics in the Bohai Sea and the Yellow Sea

文献类型： 外文期刊

作者： Zhang, Mingyu 1 ; Lin, Yan 1 ; Booth, Andy M. 4 ; Song, Xikun 1 ; Cui, Yaozong 2 ; Xia, Bin 5 ; Gu, Zhangjie 1 ; Li, Yifan 2 ; Liu, Fengjiao 6 ; Cai, Minggang 1 ;

作者机构： 1.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361002, Peoples R China

2.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361002, Peoples R China

3.Xiamen Univ Technol, Coll Environm Sci & Engn, Xiamen 361002, Peoples R China

4.SINTEF Ocean, Dept Climate & Environm, N-7465 Trondheim, Norway

5.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

6.Minnan Normal Univ, Coll Chem Chem Engn & Environm, Zhangzhou 363000, Peoples R China

7.Xiamen Univ, Fujian Prov Key Lab Coastal Ecol & Environm Studi, Xiamen 361102, Peoples R China

关键词： Microplastics; Bohai and yellow seas; Sediment; Mass budget; Source apportionment

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：9.988； 五年影响因子：10.366 ）

ISSN： 0269-7491

年卷期： 2022 年 294 卷

页码：

收录情况： SCI

摘要： As reservoirs for pollutants transported via the Yangtze and Yellow Rivers, the Bohai Sea (BS) and Yellow Sea (YS) play an important role in transporting microplastics (MPs) to the Pacific Ocean. The fate, sources and mass budget of MPs in the BS and the YS were investigated by Pearson correlation, principal component analysis-multilinear regression analysis (PCA-MRLA) and a mass balance model to sedimentary MPs data. Average MP abundances were 137 and 119 items kg(-1) in the Bohai and Yellow Seas, respectively. MPs <1000 mu m exhibited similar distribution patterns to total organic carbon and fine-grained sediments, while MPs >1000 mu m were confined in the BS and exhibited a strong positive correlation with chlorophyll-a and polyethylene terephthalate, suggesting that larger MPs might deposit faster due to biofouling or when comprised of high density polymers. PCA-MLRA analysis indicated land-based inputs (packing materials, textile material and daily commodities) were dominant in the BS, while maritime activities (fishing and mariculture) were the main source of MPs in the YS. The mass balance model revealed that the total MP input and output to the BS and the YS was 3396.92 t yr(-1) and 3814.81 t yr(-1), respectively. The major input pathway of MPs to the BS and the YS were river discharge and air deposition, respectively. Notably, 94% of MPs in the BS and the YS were deposited to sediments. This study revealed that BS and YS sediments play an important role in preventing MPs from being further transported to the Pacific Ocean, thus more attention should be paid to local ecological risk assessment.

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