基于偏最小二乘法的土壤重金属污染迁移特性研究  

Migration Characteristics of Heavy Metal Pollutant in Soil Based on Partial Least Square

作　　者：程峰[1,2] 王星华[1] 莫时雄[2] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]桂林矿产地质研究院,广西桂林市541004

出　　处：《矿业研究与开发》2013年第2期72-76,共5页Mining Research and Development

基　　金：国家高技术研究发展计划(863计划)项目(2007AA11Z134)

摘　　要：根据典型铅锌矿开采对矿区及周边土壤造成的重金属污染影响的调查,分析了矿区土壤污染的机理及成因。通过建立重金属污染迁移试验模型,并采用偏最小二乘法(PLS)建立迁移能力线性回归曲线方程得出了主要污染元素(镉)Cd、(铅)Pb、(锌)Zn的迁移特性线性关系与迁移能力的大小,根据植物对重金属元素的自净能力的研究,得出了重金属元素迁移与植物累积的相一致的关系。研究结果表明:(镉)Cd的迁移特性较强,不受植物自净能力的控制,(铅)Pb的迁移特性受植物自净能力的影响较大,迁移特性较弱,(锌)Zn的迁移特性受植物自净能力大小的控制,迁移特性最弱。Based on the investigation of the influence of miner- al exploitation on the surrounding soil pollution in a typical lead--zinc mine, the mechanism and causes of soil pollution in the minefield were analyzed. Experimental model of heavy metal pollutant migration was structured, the linear regres- sion curve equations of migratory aptitude of main pollution elements Cd, Pb and Zn were established by adopting the method of partial least squares （PLS）,the migration charac- teristics and linear relations of the heavy metal pollutants were obtained. According to the study on plant＇s self--purifi- cation capacity of heavy metals, the consistent relationship between plants accumulation of heavy metals and heavy met- als migration was obtained. The results showed that the mi-gration characteristic of Cd was more excellent,was not con trolled by self--purification capacity of plants, the migration characteristic of Pb was more greatly impacted by self--puri- fication capacity of plants, so was weaker, the migration characteristic of Zn was controlled by self-- purification ca- pacity of plants, and was the weakest.

关 键 词：铅锌矿 土壤 重金属污染 迁移特性 偏最小二乘法 

分 类 号：X53[环境科学与工程—环境工程]