Levels and human health risk assessments of heavy metals in fish tissue obtained from the agricultural heritage rice-fish-farming system in China

文献类型： 外文期刊

第一作者： Wang, Jingxin

作者： Wang, Jingxin;Guan, Fangling;Fang, Hansun;Wang, Jingxin;Shan, Qi;Zhang, Zhi;Wang, Jingxin;Shan, Qi;Zhang, Zhi;Liang, Ximei;Huang, Haomin

作者机构：

关键词： Rice-fish-farming system; Aquaculture; Heavy metals; Fish meat; Ecotoxicology

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2020 年 386 卷

页码：

收录情况： SCI

摘要： China began to practice Rice-fish-farming system (RFFS) 1700 years ago. Nowadays, the widely spread of metals could be potential threats to the quality of RFFS fish. In this study, Pb, Cd, Hg, As and Cr as the top five most toxic heavy metals were determined in six species of RFFS fish meat obtained from 7 provinces in south China. The mean concentrations of metals in RFFS fish followed Pb (36.89 mu g/kg) > As (33.36 mu g/kg) > Cr (18.54 mu g/kg) > Hg (16.35 mu g/kg) > Cd (2.01 mu g/kg), which were mostly lower in comparison with fish from traditional aquaculture systems raised by fish feeds. Grass carp obtained lower metal concentrations compared with other fishes, possibly indicating the importance of feeding habits of RFFS fish. Concentrations of metals in fish and RFFS sediment were in good correlations, and benthic fish obtained high pollution levels, suggesting the accumulation of metals through the direct contact with sediment Risks assessments coupled with Monte Carlo simulation indicated the potential non-carcinogenic risks and carcinogenic risks decreased following As > Hg > Cr approximate to Pb > Cd, and As > Cr > Cd > Pb, respectively. These results suggested RFFS is still a successful mode of green agriculture.

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