东洞庭湖湖滨带土壤酸碱度的分布及对重金属含量的影响  

Effects of the Distribution of pH Value on the Content of Heavy Metal in soil of the EasternDongting Lakeside Belt

作　　者：欧芙容 吕殿青[1] 赵丹丹[1] 

机构地区：[1]湖南师范大学资源与环境科学学院,湖南长沙410081

出　　处：《环境科学导刊》2014年第5期10-13,共4页Environmental Science Survey

基　　金：湖南省自然科学基金重点项目(11JJ2012);湖南省"十二五"重点学科建设项目(地理学);湖南省高校创新平台开放基金项目(12K035)

摘　　要：用统计学方法研究了东洞庭湖湖滨带土壤pH值的分布特征及与重金属污染特征关系。研究表明:在东洞庭湖湖滨带67个采样点中,7.46%的土样为酸性土壤,多分布在居民地和旅游区;13.43%的土样为中性土壤,多分布在湿地保护区;79.10%的土壤为碱性土壤,主要分布在农业区和工业区;无强酸性和强碱性样品。不同土壤pH范围的重金属平均含量不同,随着土壤pH值由酸性、中性到碱性的升高,Hg、Cd、Pb、Zn含量先降低后增加;As、Cu、Ni、Cr含量先增加后降低。The relationship between the distribution of pH and the content of heavy metal in the soil of the easternDongting Lakeside belt was studied using statistical methods.Sixty-seven samples were monitored.Around 7 percentages of samples were acid distributing in residential area and tourism area.About 13 percentages of samples were neutral locating in wetland reserves.Nearly 80 percentages of samples were alkaline scattering in agricultural and industrial area.The average content of heavy metals was various in different categories of soils with different pH value. The content of Hg,Cd,Pb,Zn reduced first and increased when the pH value became higher and higher from the acidity to alkaline.However,the content of As,Cu,Ni,and Cr showed an opposite change from high to low.

关 键 词：土壤 PH 空间分布 重金属 关系 东洞庭湖 

分 类 号：X131.3[环境科学与工程—环境科学]