汞在自燃煤矸石风化土壤及其农作物中的异常富集  

Mercury Enrichment in Soils from Weathered Coal Mine Spoils with Spontaneous Combustion and Crops

作　　者：宋文[1,2] 何天容[2] 

机构地区：[1]贵州大学蔡家关校区资源与环境工程学院,贵州贵阳550003 [2]贵州大学蔡家关校区,喀斯特重点实验室,贵阳550003

出　　处：《贵州工业大学学报（自然科学版）》2008年第6期1-3,8,共4页Journal of Guizhou University of Technology(Natural Science Edition)

基　　金：贵州省科学技术基金(黔科合J字[2008]2234)

摘　　要：基于冷原子荧光测定方法对贵州土城煤矿煤矸石风化土壤及农作物中挥发性元素汞的分布规律及其环境效应进行了研究。结果表明,不同风化程度煤矸石土壤中汞含量没有明显的变化规律,平均含量为0.183±0.068μg/g,略高于土壤背景值。但在自燃过的煤矸石风化土壤及受其淋滤影响的下部土壤中汞却表现为异常富集,其平均含量高达1.627±0.294μg/g.这些土壤中汞的植物可利用性也很高,在部分农作物中汞含量超过了国家标准食品汞限量值。Mercury in weathering＇ coal mine spoils with pontaneous combustion and the plants in these soils in Guizhou Province was investigated to understand distributions and environment impact of mercury in coal mine spoils. The results show total mercury levels in coal mine spoils with different weathering time were 0. 183 ±0. 068μg/g, without distributions trends with different weathering time. And these values were a little higher than the background value of mercury in soil. The mercury in soils from weathered coal mine spoils with spontaneous combustion and the soil impacted by these coal mine spoils with spontaneous com- bustion,however, show significant enrichment in the soils,and the concentrations were as high as 1. 627 ±0. 294μ g/g. The phytoavailability of mercury is high in the soils from weathered coal mine spoils with spontaneous combustion and the mercury levels in some plants exceeding the national standard.

关 键 词：汞 风化煤矸石 自燃 植物 贵州 

分 类 号：TD926.4[矿业工程—选矿]