铅锌厂周围土壤中重金属空间分布特征  

Spatial distribution of the soil heavy metal around the lead-zinc plant

作　　者：王成军[1] 孙大林[1] 刘勇[1,2] 刘华[1] 冯涛[1] 

机构地区：[1]西安建筑科技大学管理学院,西安710055 [2]西安建筑科技大学理学院,西安710055

出　　处：《地球环境学报》2014年第1期36-41,共6页Journal of Earth Environment

基　　金：国家环境保护公益性行业科研专项项目(201109053);陕西省教育厅专项科研计划项目(12JK0861)

摘　　要：通过对某铅锌厂周围土壤的地形、气候调查分析，在该铅锌厂周围纵向和横向共设27个取样点，进行实地取样和样品分析，根据分析结果探讨了该铅锌厂周围土壤中重金属空间分布特征并确定了铅锌厂的污染区域。重金属的描述性统计分析结果表明，造成土壤重金属污染的重金属主要是Pb、Cd和Cr；重金属空间分布表明，Pb和Cd主要分布在铅锌厂周围，Cu和Cr的浓度由东南向西北方向渐次增加，Ⅱ级污染区域为0～6km，复合污染区域为0．5～3km；重金属浓度相关分析表明，铅锌厂周围土壤中的重金属可能来自两个污染源，Pb和Cd的污染源是铅锌厂，其中通过研究土壤的空间分布特征与各重金属的同源关系，可以确定污染区域与污染源的数量，为后期确定污染源及土壤中重金属污染的防治提供基础数据。To investigate the spatial distribution of heavy metals in soil and determine the contaminated area around the lead-zinc plant, we set 27 sampling points around the lead-zinc plant along longitudinal and transverse direction. Descriptive statistical analysis results showed that soil heavy metal pollution mainly caused by Pb, Cd and Cr. Spatial distribution of heavy metals shows that Pb and Cd are mainly distributed around the lead-zinc plant, Cu and Cr increase gradually from southeast to northwest. The range of Level II is 0-6 km, and the range of composite contaminated area is 0.5-3 km. The concentration correlation analysis about heavy metals shows that heavy metals in soil around the lead-zinc plant may have two sources of pollution. The sources of Pb and Cd are lead-zinc factory. By studying the spatial distribution of soil characteristics and various heavy metals in homologous relationships, we can determine the pollution area and the number of pollution sources, besides, it rovides basic data for soil heavy metals pollution and following prevention.

关 键 词：重金属 空间分布特征 相关分析 

分 类 号：X53[环境科学与工程—环境工程]