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Transboundary microplastic pollution in Xiamen Bay and adjacent Jiulong River estuary after the outbreak of COVID-19

The Science of The Total Environment 2022 18 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 35 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zhong Pan Zhong Pan Zhong Pan Rupeng Du, Rupeng Du, Haitao Lin, Rupeng Du, Rupeng Du, Jincheng Sun, Haitao Lin, Jincheng Sun, Zhong Pan Zhong Pan Zhong Pan Zhong Pan Zhong Pan Huanglei Pan, Rupeng Du, Zhong Pan Zhong Pan Zhong Pan Haitao Lin, Haitao Lin, Haitao Lin, Rupeng Du, Jincheng Sun, Jincheng Sun, Jincheng Sun, Jincheng Sun, Haitao Lin, Jincheng Sun, Zhong Pan Haitao Lin, Jincheng Sun, Haitao Lin, Rupeng Du, Rupeng Du, Jielong Xu, Hui Lin, Jielong Xu, Hui Lin, Zhong Pan Zhong Pan Hui Lin, Zhong Pan Zhong Pan Zhong Pan Haitao Lin, Mazhan Zhuang, Haitao Lin, Zhong Pan Rupeng Du, Hui Lin, Zhong Pan

Summary

Researchers evaluated microplastic pollution in surface waters of Xiamen Bay and the adjacent Jiulong River estuary in 2021, following the COVID-19 outbreak, to assess land-based transport and fate of microplastics in this coastal region. They found MP abundances in Xiamen Bay ranging from 0.20 to 5.79 items/m and in the Jiulong River estuary from 0.55 to 2.11 items/m, documenting a yearly decreasing trend in the area and examining the transboundary transport dynamics between the estuary and bay.

Polymers

PE PP PS

Study Type Environmental

Land-based transport from nearshore areas is a key pathway of microplastic (MP) pollution in the oceans. Therefore, transport, fate, and intervention on MPs necessitate an investigation of MP contamination in coastal regions. Here, MP pollution in the surface waters of Xiamen Bay and Jiulong River estuary was evaluated in 2021 after the outbreak of COVID-19. The abundance of MPs in Xiamen Bay ranged from 0.20 to 5.79 items m with an average of 1.03 items m, whereas that in the Jiulong River estuary spanned from 0.55 to 2.11 items m with a mean of 1.30 items m. A yearly decreasing trend in the abundance of MPs in surface waters in both regions was observed. The particle sizes of MPs were concentrated in the range of 2.50-5.00 mm, and the colors were mainly white, transparent, and green. The micro-Raman spectroscopic results showed that MP polymer types were predominantly polyethylene, polypropylene, and polystyrene. A lower abundance of MPs in Xiamen Bay with no obvious pattern was observed, while that in the Jiulong River estuary showed a wavelike distribution from upstream to downstream. Ecological risk assessment of MP pollution in surface waters of two regions was performed using the pollution load index (PLI), giving the risk level in descending order: wastewater discharge area > aquaculture area > sloughs > estuary mouth > estuarine rivers > shipping lane. The average risk level of Xiamen Bay (I) was lower than that in Jiulong River estuary (II). The MP pollution in the Jiulong River estuary appeared heavier than that in Xiamen Bay, which may be due to the combined effects of COVID-19 and marine governance. This study provided insights into the prevention and management of MP pollution in nearshore semi-enclosed bays.

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