学术
重金属在干旱内陆盆地浅层地下水中的迁移特征——以石羊河流域昌宁盆地为例
黎涛[1] 杨俊仓[2]
[1]中国地质大学生物地质与环境地质教育部重点实验室,湖北武汉430074 [2]甘肃省地质环境监测院,甘肃兰州730020
摘 要:
在分析石羊河流域昌宁盆地水文地质条件基础上，系统采集了不同深度（0～140m）的8组岩土样，进行了重金属及盐分含量分析和室内吸附实验，并对测试结果进行聚类分析．结果表明：受区内包气带岩土层对废水中重金属的吸附作用的影响，废水对地下水的影响微弱，包气带对地下水起到了很好的屏障作用；重金属及盐分在地下岩土中的分布明显受地下水、岩性及颗粒大小等影响，并存在两个峰值，即地下水位变动带（地下65～85m深）和多层粉土、粘土层区（地下130～140m深）．[著者文摘]
文章出处:
《冰川冻土》-2008年30卷1期 -52-56页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-0240（2008）01-0052-05
Characteristics of the Migration of Heave Metals in Shallow Underground Water in an Arid Inland Basin -A Case Study in Changning Basin of the Shiyang River Watershed
LI Tao, YANG Jun-cang （1 .Biogeology and Environmental Geology Laboratory of Ministry of Education, China University of Geosciences, Wuhan Hubei 430074, China; 2 .Gansu Institute of Geo-Environmental Monitoring, Lanzhou Gansu 730020, China）
Abstract:
Based on the analysis of hydrogeological conditions of Changning basin in Shiyang River watershed, eight rock groups were collected at different depths （0-140 m） for researching. Their contents of heavy metals and salts were determined, together with laboratory adsorption experiment, and then the test resuits were analyzed with cluster analysis. It is found that because the heavy metals in waste water are adsorbed by the rocks of regional unsaturated zone, the impact of wastewater on groundwater is weak, showing that the vadose zone plays a good decontaminating role to groundwater. The distribution of heavy metals and salt markedly depends on groundwater, rock properties, particle size and so on. There are two peak barrier zones, namely the shift zone of groundwater （at the depth of 65-85 m） and the multilayer zone of silt and clay （at the depth of 130-140 m）. This paper has important value in the study of prevention of groundwater pollution in the arid inland basins.[著者文摘]
Key words:
heavy metals; arid area; inland basin; shallow groundwater; unsaturated zone
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