Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale

doi:10.1007/s11356-016-6968-7

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 自然资源与环境安全研究部 > 环境修复与资源工程研究室 > SCI/SSCI期刊论文

	Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale
	Liu X. J.; Tian, G. J.; Jiang, D.; Zhang, C.; Kong, L. Q.
	2016
关键词	Cadmium(Cd) Chinese paddy soil Spatial distribution Soil contamination Rice trade Risk heavy-metals health-risk thailand mine
英文摘要	Rice is a staple food by an increasing number of people in China. As more issues have arisen in China due to rice contaminated by cadmium (Cd), Cd contamination in arable soils has become a severe problem. In China, many studies have examined Cd contamination in arable soils on a national scale, but little studies have focused on the distribution of Cd in paddy fields. This study explored the spatial pattern of Cd in paddy soils in China, made a preliminary evaluation of the potential risk, and identified the most critically contaminated regions based on the domestic rough rice trade flow. The results showed that Cd concentrations in paddy soils in China ranged from 0.01 to 5.50 mg/kg, with a median value of 0.23 mg/kg. On average, the highest Cd concentrations were in Hunan (0.73 mg/kg), Guangxi (0.70 mg/kg), and Sichuan (0.46 mg/kg) provinces. Cd concentrations in paddy soils in central and western regions were higher than those in eastern regions, especially the southeastern coastal regions. Of the administrative regions, Cd standard exceedance rate was 33.2 %, and the heavy pollution rate was 8.6 %. Regarding to Cd of paddy soil, soil environmental quality was better in Northeast China Plain than in Yangtze River Basin and southeastern coastal region. Mining activities were the main anthropogenic pollution source of Cd in Chinese paddy soil. Based on rice trade, more of the Chinese population would be exposed to Cd through intake of rice produced in Hunan province. Certain regions that output rice, especially Hunan province, should be given priority in the management and control of Cd contamination in paddy soil.
出处	Environmental Science and Pollution Research
卷	23
期	18
页	17941-17952
语种	英语
ISSN号	0944-1344
DOI标识	10.1007/s11356-016-6968-7
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43084]
专题	资源利用与环境修复重点实验室_资源地理与国土资源研究室_SCI/SSCI期刊论文
推荐引用方式 GB/T 7714	Liu X. J.,Tian, G. J.,Jiang, D.,et al. Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale. 2016.