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《Journal of Agro-Environment Science》 2008-04
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Health Risk of Heavy Metals to The General Public in Guangzhou, China via Consumption of Vegetables

QIN Wen-shu1,2 ZOU Xiao-jin1, QIU Rong-liang1 (1.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China;2.Guangdong Industry Technical College, Guangzhou 510300, China)  
36 vegetable samples including 12 most popular vegetable types were taken in three different seasons from the Jiangnan Vegetable Wholesale Market—the biggest vegetable consumption market in Guangzhou City, and analyzed for heavy metal contents of Pb , Cd , Cr, Ni, Cu, and Zn.Results showed that Pb、Cr、Cd were the major heavy metal contaminants of vegetables in Guangzhou, with 22.2%, 38.9% and 13.9% of tested samples above the Safety Requirements for Non-environmental Pollution Vegetable respectively, while rhizome vegetables exhibited higher degree of contamination than leaf vegetables and melons.Single-factor contaminant index was utilized for assessment.It was found that over 50% vegetables in Guangzhou were contaminated, of which 28.9% were classified as slightly contaminated.The Health risks associated with these heavy metals were assessed based on the target hazard quotients (THQs), which can be derived from concentrations of heavy metals in vegetables consumed in the inhabitants.The THQs of heavy metals of vegetables in Guangzhou was below 1, which indicated that the health risk via vegetable consumption in Guangzhou was relative low.While compared to other heavy metals, more attention should be pay to Pb, the metal with the highest THQ of 0.447.
【Fund】: 广东省自然科学基金重点项目(05101824);; 教育部新世纪优秀人才支持计划资助项目(NCET04-0790)
【CateGory Index】: X56
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