电厂周围土壤磁化率对重金属污染的指示意义  

The Indicating Significance of Magnetic Susceptibility of Soil Around Coal-Fired Power Plant for Heavy Metal Pollution

作　　者：刘雯[1] 卢新卫[1] 陈灿灿[1] 周小龙[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《土壤通报》2013年第4期993-997,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金(41271510);教育部新世纪优秀人才支持计划(NCET-05-0861);中央高校基本科研业务费专项资金项目(GK200901008)资助

摘　　要：采集西安灞桥燃煤电厂周围土壤,测定土壤样品中Cu、Pb、Zn的含量和土壤磁化率,分析磁化率与Cu、Pb、Zn的关系,结果表明:燃煤电厂周围土壤的低频磁化率和高频磁化率均值分别为156.26×10-8m3kg-1和145.95×10-8m3kg-1,随着到电厂距离的增大,土壤的低频磁化率和高频磁化率在减小,而频率磁化率在增大。Cu、Pb、Zn的含量分别为20.4～531.8 mg kg-1、19.3～204.7 mg kg-1和51.6～315.8 mg kg-1,均高于陕西表层土壤元素背景值。土壤中Cu、Pb、Zn的含量及污染水平与低频和高频磁化率显著正相关,与频率磁化率显著负相关。磁化率可用于指示土壤中Cu、Pb、Zn的污染状况。The magnetic susceptibility and concentrations of Cu, Pb and Zn in soil around Xi＇an Baqiao coal-fired power plant are determined for analyzing their relationship. The results show that the average values of low and high frequency magnetic susceptibility are 156.26 × 10^-8 m^3 kg^-1 and 145.95 × 10^-8 m^3 kg^-1, respectively. The means of magnetic susceptibility are decreasing and the frequency magnetic susceptibility is increasing with the distance expanding. The concentrations of Cu, Pb and Zn in soil around Xi＇an Baqiao coal-fired power plant are 20.4 - 531.8, 19.3 - 204.0 and 51.6 - 315.8 mg kg^-1 respectively, which are higher than the corresponding background values of Shaanxi soil. The concentrations of Cu, Pb and Zn are positively correlated with the low and high frequency magnetic susceptibility significantly and heavy metals pollution levels, while are negatively correlated with the frequency magnetic susceptibility. The magnetic susceptibility can indicate the pollution level of Cu, Pb and Zn in soil.

关 键 词：燃煤电厂 土壤 磁化率 重金属 单项污染指数 

分 类 号：X833[环境科学与工程—环境工程]