Health risk from heavy metals via consumption of food crops in the vicinity of Dabaoshan mine, South China
Health risk from heavy metals via consumption of food crops in the vicinity of Dabaoshan mine, South China
复制标题
华南大宝山矿区附近食用粮食作物带来的重金属健康风险
DOI：
10.1016/j.scitotenv.2008.10.061
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发表时间：
2009-02-15
影响因子：
9.8
通讯作者：
Lia, Zhian
中科院分区：
文献类型：
--
作者：
Zhuang, Ping;McBride, Murray B.;Lia, Zhian
采矿和冶炼造成的土壤重金属污染由于所涉的潜在风险而引起重大关切。本研究旨在调查中国南方大宝山矿区周围四个村庄土壤和粮食作物中重金属（Cu、Zn、Pb和Cd）的含量，并评估重金属对人类健康的潜在风险。水稻土和菜园土中重金属含量超过了我国农业土壤的最高允许浓度。范东村水稻土中Cu（703 mg kg-1）、Zn（1100 mg kg-1）、Pb（386 mg kg-1）和Cd（5.5 mg kg-1）的污染程度较重。水稻籽粒中Cd、Pb的积累量较高。蔬菜中Cd、Pb、Zn含量均超过国家规定的最高允许浓度。在四个采样村种植的芋头积累了高浓度的锌，铅和镉。不同蔬菜对重金属的生物富集系数表现为Cd>Zn>Cu>Pb。叶菜类蔬菜对重金属的生物富集系数显著高于非叶菜类蔬菜。4个点水稻的目标危害系数（THQ）变化范围为Cu 0.66-0.89、Zn 0.48-0.60、Pb 1.43-1.99、Cd 2.61-6.25。大米和蔬菜中镉和铅的估计每日摄入量（EDI）和总汞含量超过了FAO/WHO允许的限度。矿区周围种植的粮食作物受到重金属污染，当地居民食用大米和蔬菜，造成巨大的健康风险。(C)2008 Elsevier B. V.保留所有权利。
Heavy metal contamination of soils resulting from mining and smelting is causing major concern due to the potential risk involved. This study Was designed to investigate the heavy metal (Cu, Zn, Pb and Cd) concentrations in soils and food crops and estimate the potential health risks of metals to humans via consumption of polluted food crops grown at four villages around the Dabaoshan mine, South China. The heavy metal concentrations in paddy and garden soils exceeded the maximum allowable concentrations for Chinese agricultural soil. The paddy soil at Fandong village was heavily contaminated with Cu (703 mg kg(-1)), Zn (1100 mg kg(-1)), Pb (386 mg kg(-1)) and Cd (5.5 mg kg(-1)). Rice tended to accumulated higher Cd and Pb concentration in grain parts. The concentrations of Cd, Pb and Zn in vegetables exceeded the maximum permissible concentration in China. Taro grown at the four sampled villages accumulated high concentrations of Zn, Pb and Cd. Bio-accumulation factors for heavy metals in different vegetables showed a trend in the order: Cd>Zn>Cu>Pb. Bio-accumulation factors of heavy metals were significantly higher for leafy than for non-leafy vegetable. The target hazard quotient (THQ) of rice at four sites varied from 0.66-0.89 for Cu, 0.48-0.60 for Zn, 1.43-1.99 for Pb, and 2.61-6.25 for Cd. Estimated daily intake (EDI) and THQs for Cd and Pb of rice and vegetables exceeded the FAO/WHO permissible limit. Heavy metal contamination of food crops grown around the mine posed a great health risk to the local population through consumption of rice and vegetables. (C) 2008 Elsevier B.V. All rights reserved.