Abundance of microplastics in cultured oysters (Crassostrea gigas) from Danang Bay of Vietnam

Do, Van Manh; Dang, Thi Thom; Le, Xuan Thanh Thao; Nguyen, Duy Thanh; Phung, Thi Vi; Vu, Dinh Ngo; Phạm, Hùng Việt

Abundance of microplastics in cultured oysters (Crassostrea gigas) from Danang Bay of Vietnam

2022

This study focuses on determination of quantity, shape, size and polymer types of microplastics in Pacific oysters (Crassostrea gigas) cultured in Danang Bay, Vietnam. Visual verification and chemical identification of microplastics was carried out by μFT-IR spectra using Nicolet iN10 MX Infrared Imaging Microscope. The average abundance of microplastic in oysters was 1.88 ± 1.58 particles/g (wet weight) and 18.54 ± 10.08 particles/individual. The prevalent shape of microplastics included three main forms as fragment, fiber and bead corresponding to 73.71; 25.84 and 0.45%, respectively. Additionally, the size of microplastics was a range of 22.4–1318.8 μm, and the most common size was less than 100 μm, accounted for 77.30%. Fifteen polymer types were detected while Nylon was the most abundant polymer type with 50.56%. In this study, microplastics accumulation with their abundance and polymeric structures could be considered as reliable evidence for further studies on assessment of their potential risk to human health.

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