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Widespread occurrence of microplastics in marine bays with diverse drivers and environmental risk

Environment International 2022 59 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zhao‐Feng Guo, Yuyao Xu, Yuyao Xu, Yuyao Xu, Dong Liu, Dong Liu, Yong‐Guan Zhu Faith Ka Shun Chan, Faith Ka Shun Chan, Matthew F. Johnson, Faith Ka Shun Chan, Faith Ka Shun Chan, Faith Ka Shun Chan, Faith Ka Shun Chan, Yuyao Xu, Matthew F. Johnson, Matthew Johnson, Faith Ka Shun Chan, Faith Ka Shun Chan, Yong‐Guan Zhu Zhao‐Feng Guo, Yuyao Xu, Yuyao Xu, Faith Ka Shun Chan, Matthew F. Johnson, Faith Ka Shun Chan, Matthew F. Johnson, Yaoyang Xu, Yuyao Xu, Yuyao Xu, Matthew F. Johnson, Yuyao Xu, Faith Ka Shun Chan, Faith Ka Shun Chan, Yuyao Xu, Faith Ka Shun Chan, Dong Liu, Matthew F. Johnson, Matthew F. Johnson, Matthew F. Johnson, Yong‐Guan Zhu Yong‐Guan Zhu Faith Ka Shun Chan, Yaoyang Xu, Yaoyang Xu, Zhao‐Feng Guo, Yong-Guan Zhu, Yong‐Guan Zhu Matthew F. Johnson, Matthew F. Johnson, Yong‐Guan Zhu Yong‐Guan Zhu Yaoyang Xu, Yong‐Guan Zhu Yong-Guan Zhu, Yong‐Guan Zhu Yong‐Guan Zhu Faith Ka Shun Chan, Yuyao Xu, Yuyao Xu, Matthew F. Johnson, Yong‐Guan Zhu Yong-Guan Zhu, Yaoyang Xu, Zhao‐Feng Guo, Yong‐Guan Zhu Faith Ka Shun Chan, Yuyao Xu, Yong‐Guan Zhu Yong‐Guan Zhu Dong Liu, Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yu-Yao Xu, Yong‐Guan Zhu Zhao‐Feng Guo, Yong-Guan Zhu, Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Matthew F. Johnson, Yong‐Guan Zhu Dong Liu, Yong‐Guan Zhu Yong‐Guan Zhu Matthew Johnson, Zhao‐Feng Guo, Yaoyang Xu, Yaoyang Xu, Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yuyao Xu, Yong‐Guan Zhu Yong-Guan Zhu, Yong-Guan Zhu, Yaoyang Xu, Yong‐Guan Zhu Yong‐Guan Zhu Yaoyang Xu, Yong‐Guan Zhu Yaoyang Xu, Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu Dong Liu, Yaoyang Xu, Yuyao Xu, Yong‐Guan Zhu Yong‐Guan Zhu Yaoyang Xu, Yong‐Guan Zhu Yong‐Guan Zhu Yong‐Guan Zhu

Summary

Researchers compiled data from 649 sediment samples across 24 marine bays worldwide to assess microplastic contamination patterns and environmental risk. The study found that East Asian bays had higher concentrations, driven by river plastic emissions and aquaculture production, and identified Asian bays as potential high-risk areas based on microplastic bioavailability and toxicity assessments.

Polymers

Study Type Environmental

Microplastic contamination in the sediment of marine bays has attracted widespread attention, whereas the distribution, sedimentation, morphology and risk of microplastics at regional scale remain poorly understood. By introducing a data mining framework into microplastic research, we compiled a microplastic dataset of 649 samples from 24 bays to enhance the understanding of geographical difference and drivers, transfer, composition profile and environmental risk of sedimental microplastics. Microplastic abundance varied from 0.72 to 1963.96 items/kg dry weight, with higher concentrations mainly occurring in East Asian bays. The spatial pattern in abundance was driven by the river plastic emissions, aquaculture production and hydrodynamic condition. A significantly positive correlation between microplastic abundance in water and sediment was found, and microplastic sedimentation was related to polymer density, hydrodynamic conditions and sediment properties. The dominant shape and polymer of sedimental microplastics were fiber and polypropylene, respectively, and the similarity of microplastic composition decreased with increasing geographical distance. The environmental risks of microplastics were partitioned into three classes (Rank II-Rank IV) with a two-dimensional assessment system considering the bioavailability and toxicity of microplastics, and Asian bays were identified as potential high-risk areas. To reduce the environmental risk of sedimental microplastics in bays, priority should be given to the removal of microfibers, and control measures depend on the risk classes and dominant polymers. Microplastic abundance and composition were significantly affected by methodological choices regarding sampling, pretreatment and identification, suggesting a unified methodology is essential to further enhance our knowledge on the distribution and risk of microplastics in marine bays.

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