Potential health risk in areas with high naturally-occurring cadmium background in southwestern China

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	Potential health risk in areas with high naturally-occurring cadmium background in southwestern China
	Yizhang Liu; TangfuXiao; PhilippeC.Baveye; JianmingZhu; ZengpingNin
刊名	Ecotoxicology and Environmental Safety
	2015
卷号	112 期号:1 页码:122-131
英文摘要	In various parts of the world, high cadmium (Cd) concentrations in environment are not related to anthropogenic contamination but have natural origins. Less is known about health risks that arise under these conditions. This study aimed to discuss the pollution of Cd with natural sources, and to investigate the concentration of Cd in food crops and the urine of inhabitants in an area of southwestern China. The results showed that the arable soils are moderately contaminated by Cd (I-geo=1.51) relative to the local background, with a high ecological risk (E-r=218). The chemical fractions of Cd in soils with natural sources are probably controlled by parent materials and mostly in residual phase. The average Cd concentrations were 0.68 mg kg(-1) (fresh weight) in local vegetables, 0.04 mg kg(-1) in rice, and 0.14 mu g L-1 in water. Leafy vegetable tends to accumulate more Cd than the other crops. The calculated Target Hazard Quotient (THQ) had a much higher value (4.33) for Cd, suggesting that Cd represents a significant potential risk to the local population. The urinary Cd concentrations (mean at 3.92 mu g L-1 for male and 4.85 mu g L-1 for female) of inhabitants in the study area were significantly higher (p <0.05) than those from the control area (mean at 0.8 mu g L-1 for male and 0.42 mu g L-1 for female). Male and female test subjects had similar urinary Cd levels (p > 0.05), but age seemed to lead to an increase in Cd in the urine. These findings show that naturally-occurring Cd in local soils is taken up appreciably by local food crops, and that dietary exposure of Cd through vegetable ingestion is a major exposure pathway for local populations, and a potential risk to public health in the study area.
学科主题	环境地球化学
语种	英语
公开日期	2017-05-15
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6016]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Yizhang Liu,TangfuXiao,PhilippeC.Baveye,et al. Potential health risk in areas with high naturally-occurring cadmium background in southwestern China[J]. Ecotoxicology and Environmental Safety,2015,112(1):122-131.
APA	Yizhang Liu,TangfuXiao,PhilippeC.Baveye,JianmingZhu,&ZengpingNin.(2015).Potential health risk in areas with high naturally-occurring cadmium background in southwestern China.Ecotoxicology and Environmental Safety,112(1),122-131.
MLA	Yizhang Liu,et al."Potential health risk in areas with high naturally-occurring cadmium background in southwestern China".Ecotoxicology and Environmental Safety 112.1(2015):122-131.