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Heavy metal contaminations in soil-rice system: source identification in relation to a sulfur-rich coal burning power plant in Northern Guangdong Province, China

文献类型: 外文期刊

作者: Wang, Xiangqin 1 ; Zeng, Xiaoduo 2 ; Liu Chuanping 1 ; Li, Fangbai 1 ; Xu, Xianghua 1 ; Lv, Yahui 1 ;

作者机构: 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China

关键词: Coal burning power plant;Cadmium;Heavy metals;Paddy soil;Rice;Health risk

期刊名称:ENVIRONMENTAL MONITORING AND ASSESSMENT ( 影响因子:2.513; 五年影响因子:2.871 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Heavy metal contents (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) in 99 pairs of soil-rice plant samples were evaluated from the downwind directions of a large thermal power plant in Shaoguan City, Guangdong Province, China. Results indicate that there is a substantial buildup of As, Cd, Cu, Pb, and Zn in the predominant wind direction of the power plant. The significant correlations between S and heavy metals in paddy soil suggest that the power plant represents a source of topsoil heavy metals in Shaoguan City due to sulfur-rich coal burning emissions. Elevated Cd concentrations were also found in rice plant tissues. Average Cd (0.69 mg kg(-1)) and Pb (0.39 mg kg(-1)) contents in rice grain had exceeded their maximum permissible limits (both were 0.2 mg kg(-1)) in foods of China (GB2762-2005). The enrichment of Cd and Pb in rice grain might pose a potential health risk to the local residents.

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