农业环境科学学报2013，Vol.32Issue(1)：111-117,7.DOI:10.11654/jaes.2013.01.017
丹江口水库淅川淹没区土壤中汞和砷的赋存特征及生态风险评价
Distribution Characteristics and the Potential Ecological Risk of Hg and As in the Soil of Xichuan Submerged Area in the Danjiangkou Reservoir, China
摘要
Abstract
The distribution characteristics and potential ecological risk of Hg and As in the soil of Xichuan submerged area in the Danjiangkou Reservoir were studied. Thirty soil samples were collected and determined using hydride generation-atomic fluorescence spertrometry after microwave digestion. The results showed that the concentrations of Hg and As met grade II of the Environmental Quality Standard for Soil. However the variation of Hg was significant, which indicated different sources of Hg in the soil of Xichuan. The contents of Hg and As were correlated to soil properties. There were significantly negative relationship between pH and Hg, positive relationship between pH and As and positive relationship between organic matter and Hg. The negative relations between organic matter and As was not significant. The potential ecological risks of Hg and As assessed to be low in most areas of the Danjiangkou Reservoir by using the Hakanson ecological risk index method. The single factor analysis indicated a higher ecological risks level for Hg than As for irrigation regions. The moderate pollution level of Hg in some area of Danjiangkou Reservoir calls for further attention.关键词
土壤/重金属/分布特征/风险评价Key words
soil/ heavy metals/ distribution characteristics/ risk assessment分类
资源环境引用本文复制引用
佘加平,武俐,赵同谦,张坤峰..丹江口水库淅川淹没区土壤中汞和砷的赋存特征及生态风险评价[J].农业环境科学学报,2013,32(1):111-117,7.基金项目
教育部新世纪优秀人才支持计划(NCET-09-0120) （NCET-09-0120）
