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
作者: Wang, Jingxin 1 ; Shan, Qi 3 ; Liang, Ximei 5 ; Guan, Fangling 2 ; Zhang, Zhi 3 ; Huang, Haomin 6 ; Fang, Hansun 2 ;
作者机构: 1.Guangdong Pharmaceut Univ, Sch Publ Hlth, Guangzhou 510310, Peoples R China
2.Jiangxi Agr Univ, Coll Land Resource & Environm, Key Lab Poyang Lake Basin Agr Resource & Ecol Jia, Nanchang 330045, Jiangxi, Peoples R China
3.Chinese Acad Fishery Sci, Key Lab Recreat Fisheries Res, Minist Agr, Guangzhou 510380, Peoples R China
4.Chinese Acad Fishery Sci, Minist Agr, Lab Qual & Safety Risky Assessment Aquat Prod, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China
5.Jiangxi Agr Univ, Coll Anim Sci & Technol, Nanchang 330045, Jiangxi, Peoples R China
6.South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China
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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