Cadmium in agricultural soils, vegetables and rice and potential health risk in vicinity of Dabaoshan Mine in Shaoguan, China
来源期刊：中南大学学报(英文版)2014年第5期
论文作者：WANG Zhen-xing(王振兴) HU Xi-bang(胡习邦) XU Zhen-cheng(许振成) CAI Li-mei(蔡立梅) WANG Jun-neng(王俊能) ZENG Dong(曾东) HONG Hong-jia(洪鸿加)
文章页码：2004 - 2010
Key words：cadmium; health risk; soil pollution; vegetables; paddy rice; dietary intake
Abstract: Soil cadmium (Cd) contamination resulted from mining and smelting is a major environmental concern, and health risk associated with Cd exposure to multi-media through muti-pathway is increasing. Cd concentrations in soils, vegetables and paddy rice were investigated, and potential non-carcinogenic and carcinogenic health risks exposure to Cd were estimated at six villages around the Dabaoshan Mine, South China. A total of 87 soil samples were found to exceed the China’s maximum permission level (MPL) for Cd, while the highest value of 4.42 mg/kg was found near irrigation ditch associated with Hengshi River in Xinyi (XY) Village. Cd contents in vegetables and rice exceeded the maximum permissible concentration by more than five times in every village. Cadmium accumulation in plants is in the order of celery > lactuca sativa L > Chinese cabbage > Romaine lettuce > asparagus lettuce > mustard > cabbage mustard > cabbage. The mean hazard quotient (HQ) of all villages is in the range of [5.29, 25.75], and the mean values of cancer risk for investigated areas are more than 10 times greater than the USEPA (2009) threshold limit value of 10-4. Moreover, human non-carcinogenic and carcinogenic risks are mainly attributable to paddy rice intake, followed by vegetables intake, soil ingestion, inhalation, and dermal contact. The results indicate that Cd has a huge potential risk on human health for the local residents.
WANG Zhen-xing(王振兴)1, HU Xi-bang(胡习邦)1, XU Zhen-cheng(许振成)1, CAI Li-mei(蔡立梅)1, 2, WANG Jun-neng(王俊能)1, ZENG Dong(曾东)1, HONG Hong-jia(洪鸿加)1
(1. South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China; 2. School of Earth Environment and Water Resource, Yangtze University, Wuhan 430100, China)
Abstract:Soil cadmium (Cd) contamination resulted from mining and smelting is a major environmental concern, and health risk associated with Cd exposure to multi-media through muti-pathway is increasing. Cd concentrations in soils, vegetables and paddy rice were investigated, and potential non-carcinogenic and carcinogenic health risks exposure to Cd were estimated at six villages around the Dabaoshan Mine, South China. A total of 87 soil samples were found to exceed the China’s maximum permission level (MPL) for Cd, while the highest value of 4.42 mg/kg was found near irrigation ditch associated with Hengshi River in Xinyi (XY) Village. Cd contents in vegetables and rice exceeded the maximum permissible concentration by more than five times in every village. Cadmium accumulation in plants is in the order of celery > lactuca sativa L > Chinese cabbage > Romaine lettuce > asparagus lettuce > mustard > cabbage mustard > cabbage. The mean hazard quotient (HQ) of all villages is in the range of [5.29, 25.75], and the mean values of cancer risk for investigated areas are more than 10 times greater than the USEPA (2009) threshold limit value of 10-4. Moreover, human non-carcinogenic and carcinogenic risks are mainly attributable to paddy rice intake, followed by vegetables intake, soil ingestion, inhalation, and dermal contact. The results indicate that Cd has a huge potential risk on human health for the local residents.
Key words:cadmium; health risk; soil pollution; vegetables; paddy rice; dietary intake
