干旱区生态环境知识资源中心(Arid): 基于GIS的淮南煤矿废弃地土壤重金属污染生态风险评价

Arid

	基于GIS的淮南煤矿废弃地土壤重金属污染生态风险评价
其他题名	Potential ecological risk assessment of heavy metal distribution in the Datong deserted coal mining area in Huainan based on GIS
	孙贤斌 1; 李玉成 2
来源期刊	安全与环境学报
ISSN	1009-6094
出版年	2015
卷号	15 期号:2 页码:348-352
中文摘要	为了解淮南大通煤矿重金属污染特征及其生态风险,以该废弃地土壤为研究对象,通过测定土壤重金属元素质量比,评价其潜在生态风险,结合GIS技术分析其空间变化趋势。结果表明:1)淮南大通煤矿废弃地土壤重金属汞(Hg)、镉(Cd)、铬(Cr)、铅(Pb)、铜(Cu)超出土壤背景值1.99~27.2倍,其中以Hg和Cd污染最为严重。2)大通煤矿废弃地地表土Hg的单因子风险等级均在强以上,Cd的风险等级为极强和很强,其面积比例为98.79%、1.21%。底层土Hg的单因子风险等级以极强和很强为主,占区域面积比例分别为60.33%、21.86%,Cd的风险等级均为极强。Hg和Cd是煤矿废弃地最主要的综合生态风险贡献因子,主要风险区为煤矸石堆斜坡、塌陷区、化工厂滤池等地;Cr、Pb和Cu单因子风险均为轻微等级。3)大通煤矿废弃地地表土和底层土综合生态风险均为很强和强两个等级,表层土面积比例分别为88.05%和11.95%,底层土面积比例分别为97.81%和2.19%;底层土的风险指数值更大,表层土以原化工厂与煤矸石堆斜坡为中心高值区,底层土的高值中心位于煤矿塌陷区。
英文摘要	The paper is concerned about a potential ecological risk assessment of heavy metal distribution in the Datong deserted coal mining area in Huainan based on GIS technology. To proceed with our research, we have collected and examined the heavy metal pollution characteristics and the potential ecological risks to the mining area and Huainan City, with the help of GIS technique, in addition to the spatial changing trend of the area. The results show that:(1) On average, the concentrations of 5 heavy metal elements exceed the background values by 1.99-27.2 times, with the pollution of Hg and Cd being the most serious ones, followed by Cr and Pb. The pollution of Cu is found relatively slight.(2) In the soil depth of 0-10 cm, Hg turns out to be very strong, which is above the average level in contamination. And the contamination of Cd is "extremely strong" and "very strong", the area pollution proportion among the total stands in a ratio of 98.79% to 1.21% respectively. In the bottom soil depth of 20-30 cm, the single factor risk level of Hg turns out to be extremely strong or very strong, with the proportions being 60.33% and 21.86%, respectively, and that of Cd being extremely strong. What is more, Hg and Cd serve as the main contributors to the comprehensive ecological risk indexes in the deserted mining area. Besides, the main risk areas are the heap slopes of the coal gangue, chemical filter of the former chemical plants and the coal mining subsidies, though the single factor risk levels of Cr, Pb and Cu can be said to mild.(3) So far as the comprehensive ecological risk levels of surface soil and bottom soil are concerned, the risk levels can be said very strong and strong, respectively. The area proportions of surface soil pollution can be said to reach 88.05% to 11.95%, as compared with the bottom soil, 97.81% to 2.19%. The index of the risk value in the bottom soil is also bigger, with the high concentrations focused in the parts including the former chemical plants and heap slope coal gangue areas, while high concentrations center in the surface soil in the coal mining subsidence areas.
中文关键词	环境学 ; 土壤重金属 ; 生态风险评价 ; 大通煤矿废弃地
英文关键词	GIS environmentalology heavy metal in soil ecological risk assessment GIS abandoned coal mine in Datong area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5435515
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232339
作者单位	1.皖西学院资源环境与旅游管理学院, 六安, 安徽 237012, 中国; 2.安徽大学资源与环境工程学院, 煤矿生态环境保护国家工程实验室, 合肥, 安徽 230601, 中国
推荐引用方式 GB/T 7714	孙贤斌,李玉成. 基于GIS的淮南煤矿废弃地土壤重金属污染生态风险评价[J],2015,15(2):348-352.
APA	孙贤斌,&李玉成.(2015).基于GIS的淮南煤矿废弃地土壤重金属污染生态风险评价.安全与环境学报,15(2),348-352.
MLA	孙贤斌,et al."基于GIS的淮南煤矿废弃地土壤重金属污染生态风险评价".安全与环境学报 15.2(2015):348-352.