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Microplastic accumulation in bivalves collected from different coastal areas of Vietnam and an assessment of potential risks

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Abstract

Microplastic (MP) pollution is an emerging problem in many areas around the world and in coastal areas of Vietnam, requiring more studies dedicated to the accumulation of this pollutant in the food chain as well as its potential risk to human health. This study investigated MP levels in tissues of five common bivalve species collected from aquaculture areas along the coast of Vietnam. MPs were found in all bivalve samples, with average values of 10.84 ± 2.61 items/individual or 2.40 ± 1.34 items/g wet weight. Impacts of feeding habits of bivalves showed influences on MP abundance in the samples. Fibers were the dominant shape of MPs recorded, most of which accumulated in the gills and digestive glands of all bivalve samples, with the majority falling within the size range of 300—2000 µm. MPs found in all studied species had relatively similar chemical compositions, mainly composed of polypropylene (PP) and polyethylene (PE). In this study, a diverse diet consisting of different bivalve species and detailed data on the consumption rate of these species were used to assess the human health risk of MPs dedicated to the coastal communities of Vietnam. The results suggested a significant part of MP uptake by human could be via bivalve consumption, in which removing viscera and proper depuration should be applied prior to eating, thereby reducing the risk.

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The main part of the research data is included in the article. Other data can be made available from the corresponding author upon request.

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Acknowledgements

The authors thank many individuals for their help in collecting samples in the field. The authors thank the reviewers for comments that helped improve the manuscript and thank Stephanie Lilly for English language editing.

Funding

This research is funded by the Vietnam Academy of Science and Technology and Institute of Environmental Technology, under grant number NCVCC30.03/22–23.

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Thi Oanh Doan: methodology, experimental section, data analysis and original draft writing, Thi Thuy Duong: project administration, conceptualization, supervision, sampling and editing, Le Anh Pham: data analysis, writing and editing, Thi My Nguyen: sampling, experimental section and data analysis, Phuong Thao Pham: experimental section and data analysis, Thi Quynh Hoang: methodology, experimental section and data analysis, Ngoc Nam Phuong: methodology, experimental section and data analysis, Thuy Lien Nguyen: sampling, experimental section and data analysis, Thi Thu Ha Pham: experimental section and data analysis, Thi Diem My Ngo: experimental section and data analysis, Nam Anh Le: sampling and data analysis, Van Chi Vo: sampling and data analysis, Van Manh Do: conceptualization, supervision, Thi Phuong Quynh Le: conceptualization, supervision and editing. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Thi Thuy Duong or Le Anh Pham.

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Doan, T.O., Duong, T.T., Pham, L.A. et al. Microplastic accumulation in bivalves collected from different coastal areas of Vietnam and an assessment of potential risks. Environ Monit Assess 195, 1511 (2023). https://doi.org/10.1007/s10661-023-12087-8

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  • DOI: https://doi.org/10.1007/s10661-023-12087-8

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