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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Environmental Sources Marine & Wildlife Sign in to save

Pollution characteristics and ecological risk of microplastic in sediments of Liaodong Bay from the northern Bohai Sea in China

Marine Pollution Bulletin 2022 33 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Yuheng Ye, Anguo Zhang, Jia Teng, Xiaolong Yang, Xiutang Yuan, Qing Wang, Jianmin Zhao, Jianmin Zhao, Bin Zhang, Tianzhe Zhang, Xuejiao Chen, Tongwei Guan, Xindong Ma

Summary

Researchers characterized microplastic pollution in estuarine sediments of Liaodong Bay in northern China, finding that rayon fibers dominated at concentrations averaging 32 to 50 items per kilogram, with ecological risk assessment indicating low to moderate risk levels.

Polymers
PA PE PET PP

Microplastics (MPs) are widely distributed in marine environments. The pollution characteristics and risk assessment of MPs in estuarine sediments are still insufficient. In this study, the MPs pollution characteristics in surface sediments of the Liao Estuary and Daliao Estuary were investigated. The characteristics of MPs in sediments were determined by stereo microscopy and micro-Fourier transform infrared spectroscopy. The results showed that the average MPs abundance ranged from 32.33 to 49.91 items·kg d.w. The MPs were mainly composed of 500-2000 μm black and blue fibers. Five polymer types were identified, including rayon (RA) (87.46 %), polyethylene terephthalate (PET) (6.81 %), polyamide (PA) (2.94 %), polypropylene (PP) (2.17 %) and polyethylene (PE) (0.62 %). The pollution load index (PLI) risk assessment showed that all sampling sites were at Hazard Level I. Our results can provide useful information for assessing the environmental risks of MPs in coastal areas of China.

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