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《Acta Scientiae Circumstantiae》 2008-07
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Heavy metal contamination and health risk assessment in Dabao Mountain,China

ZOU Xiaojin1, QIU Rongliang1, 2,, ZHOU Xiaoyong1, ZHENG Wenhui31. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275 2. Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, Guangzhou 510275 3. Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080  
The food chain is the main pathway of heavy metals transfer from the environment to humans. This study focused on the acid mine contamination and health effects of Pb, Zn, Cd, and Cu in Shangba village, Guangdong province, China. The results showed that the mean concentrations of Pb, Zn, Cd and Cu were 0.80, 22.45, 0.28 and 1.07 mg·kg-1 in vegetables and 2.81, 60.83, 0.58 and 6.54 mg·kg-1 in rice, respectively. Further, Pb, Zn and Cd concentrations in rice were 7.2, 3.4, 2.9 times greater than the tolerance level. 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 drinking water, rice and vegetables consumed by the inhabitants. The THQ of Pb, Zn, Cd, and Cu in rice were greater than 1. THQ values indicated that consumption of both rice and vegetables would lead to high potential health risks especially for children. The THQs results from drinking water consumption showed that the health risk for humans was low. The Cd concentrations were 4.69 μg·L-1 and 3.41 μg·g-1 creatine in blood and urine, respectively. The results showed that Cd and Pb were the most important metals affecting the inhabitants in this contaminated area. The health risk from Cd and Pb was slightly more than that of uncontaminated areas in other countries and districts.
【Fund】: 广东省自然科学基金团队项目(No06202438);; 教育部“新世纪优秀人才支持计划”项目(NoNCET-04-0790);; 广东省重大科技专项基金资助项目(No2004A30308002);; 985二期“环境与污染控制技术创新平台”资助项目~~
【CateGory Index】: X53
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