Microplastic pollution in water, sediment, and specific tissues of crayfish (Procambarus clarkii) within two different breeding modes in Jianli, Hubei province, China

文献类型： 外文期刊

第一作者： Zhang, Dongdong

作者： Zhang, Dongdong;Fraser, Maria A.;Zhang, Chunfang;Zhang, Dongdong;Ge, Chengjun;Zhang, Dongdong;Wang, Yi;Guo, Peng;Huang, Wei

作者机构：

关键词： Microplastics; Crayfish; Tissues; Breeding mode; Cleansing treatment

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN： 0269-7491

年卷期： 2021 年 272 卷

页码：

收录情况： SCI

摘要： This study investigates the occurrence and distribution of microplastics in water, sediment, and crayfish samples within pond and rice-crayfish co-culture breeding modes in Jianli prefecture, China. Microplastics in environmental and biological samples were systematically extracted by CaCl2 solution, digested by H2O2 and KOH, and identified by m-FTIR. A cleansing treatment for crayfish was performed in pure water before dissection and microplastic accumulation in different tissues (gill, stomach, gut, and flesh) of non-cleansed and cleansed crayfish were compared. The average microplastic abundances were 1.3 +/- 0.1-2.5 +/- 0.1 particles/L, 0.03 +/- 0.01-0.04 +/- 0.02 particles/g, and 0.17 +/- 0.07-0.92 +/- 0.19 particles/ individual in water, sediment, and crayfish samples, respectively. Microplastics were detected in all studied crayfish tissues, except the flesh. There were no significant differences in microplastic abundances inwater (P = 0.82), sediment (P = 0.90), and crayfish (P = 0.47 for non-cleansed samples; P = 0.30 for cleansed samples) between two breeding modes despite the detection of relatively higher microplastic abundances in the samples from the pond breeding mode. Microplastic accumulation in noncleansed crayfish stomachs and guts (0.71 +/- 0.18 particles/individual) was higher (P < 0.01) than that recorded in their gills (0.13 +/- 0.06 particles/individual). Moreover, microplastics present in the stomachs and guts of cleansed crayfish were significantly less abundant (P < 0.01) than in non-cleansed crayfish, although this was not observed in the gills (P = 0.99). The majority of microplastic particles in this study had fiber-like shapes, blue and transparent colors, a size smaller than 1 mm, and polymer types of PP:PE and PE. The results demonstrate that microplastics in the environment can accumulate in the internal tissues of crayfish, which may pose a potential risk to humans through food consumption without the removal of the gills, stomach, and guts. This study provides valuable information for understanding microplastic accumulation in the different tissues of crayfish and the potential risk of human exposure to microplastics from crayfish as a food supplement. (C) 2020 Elsevier Ltd. All rights reserved.

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