Abstract
The occurrence and characterization of marine debris on beaches bring opportunities to track back the anthropogenic activities around shorelines as well as aid in waste management and control. In this study, the three largest beaches in Thanh Hoa (Vietnam) were examined for plastic waste, including macroplastics (≥ 5 mm) on sandy beaches and microplastics (MPs) (< 5 mm) in surface water. Among 3803 items collected on the beaches, plastic waste accounted for more than 98%. The majority of the plastic wastes found on these beaches were derived from fishing boats and food preservation foam packaging. The FT-IR data indicated that the macroplastics comprised 77% polystyrene, 17% polypropylene, and 6% high-density polyethylene, while MPs discovered in surface water included other forms of plastics such as polyethylene- acrylate, styrene/butadiene rubber gasket, ethylene/propylene copolymer, and zein purified. FT-IR data demonstrated that MPs might also be originated from automobile tire wear, the air, and skincare products, besides being degraded from macroplastics. The highest abundance of MPs was 44.1 items/m3 at Hai Tien beach, while the lowest was 15.5 items/m3 at Sam Son beach. The results showed that fragment form was the most frequent MP shape, accounting for 61.4 ± 14.3% of total MPs. MPs with a diameter smaller than 500 μm accounted for 70.2 ± 7.6% of all MPs. According to our research, MPs were transformed, transported, and accumulated due to anthropogenic activities and environmental processes. This study provided a comprehensive knowledge of plastic waste, essential in devising long-term development strategies in these locations.
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Acknowledgements
This study was funded by the Vietnam Academy of Science and Technology under the grand number VAST06.03/20-21, QTRU02.03/21-22, and CSCL10.03/22-22.
Nguyen Quang Bac was funded by Vingroup JSC and supported by the Master, PhD Scholarship Programme of Vingroup Innovation Foundation (VINIF), Institute of Big Data, code VINIF.2021.TS.101.
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Dao Dinh Cham: conceptualization, methodology, project administration. Duong Thi Lim: formal analysis, validation, supervision. Nguyen Thi Huong Thuy: investigation, resources. Nguyen Thi Hue: data curation, resources. Nguyen Thi Lan Huong: funding acquisition, writing original draft. Nguyen Thi Huong Thuy: data curation, resources. Dang Tran Quan: data collection, analysis. Dao Ngoc Nhiem: investigation, resources, visualization. Pham Ngoc Chuc: data collection, analysis. Nguyen Thi Ha Chi: data curation, resources. Duong Cong Dien: data collection, methodology, software. Bui Thi Thu: data collection, analysis. Nguyen Quang Bac: visualization, writing – review and editing.
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Dao, C.D., Duong, L.T., Nguyen, T.H.T. et al. Plastic waste in sandy beaches and surface water in Thanh Hoa, Vietnam: abundance, characterization, and sources. Environ Monit Assess 195, 255 (2023). https://doi.org/10.1007/s10661-022-10868-1
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DOI: https://doi.org/10.1007/s10661-022-10868-1