摘要
以流经中国铅锌矿储量最大的兰坪金顶铅锌矿区的澜沧江支流——沘江的河谷冲积物为研究对象,通过实地调查采样、室内实验测定和统计分析等方法,测定并分析了沘江河谷沉积物的磁化率特征与重金属Pb、Zn、Cd的含量,以探讨矿产开发对河谷沉积物重金属含量的影响,并试图为其监测提供一种简单有效的手段。研究表明:(1)沘江沉积物磁化率因受到兰坪铅锌矿产开发活动的影响表现出明显的分段性,且与重金属污染状况的分段性基本吻合,呈现上游污染段沉积物的重金属含量和磁化率均高于下游的特征,且单因子污染指数较高的河段磁化率也高;(2)回归分析显示,沉积物磁化率与重金属含量显著相关;(3)可以利用磁性测试监测矿区河流沉积物的重金属污染状况。
Lanping Lead-zinc Mine is the biggest one in China. The upstream of Bijiang River is originated from the Laping Lead-zinc Mine. Therefore, Bijiang River was affected by mining activities of Lanping Lead-zinc Mine, and had become a typically polluted river by heavy metals. According to the measurement on the magnetic susceptibility and heavy metal pollution in the sediments of Bijiang River, the present situation of heavy metal pollution in the river sediments was delineated, with a simple and effective method to monitor the heavy metal pollution in river sediments around mineral mining sites. The results indicate that： （1） The magnetic susceptibility of upper and lower stream are different, while the pollution of heavy metal has the same characteristics, because the Bijiang river was influenced by the exploitation of mining activities of Lanping Lead-zinc in upper stream. （2） The regression analysis indicates that： the magnetic susceptibility and the content of heavy metal in sediments are correlated significantly. （3） The magnetic susceptibility can be an effective, convenient and economical method to monitor the pollution degree of heavy metal in river sediments.
出处
《生态环境》
CSCD
北大核心
2008年第1期201-205,共5页
Ecology and Environmnet
基金
国家重点基础研究发展计划(973计划)(2003CB15100)
云南省重点基础研究资助项目(2004D004Z)
关键词
磁化率
重金属污染
批江
沉积物
magnetic susceptibility
heavy metal contamination
Bijing River
sediments
