公路旁土壤重金属污染及来源识别  

Heavy metals pollution in roadside soils and source identification

作　　者：李仰征[1] 马建华[2] 莫世江[1] 

机构地区：[1]毕节学院地理与生命科学学院,贵州毕节551700 [2]河南大学资源与环境研究所,河南开封475004

出　　处：《广东农业科学》2013年第16期174-177,共4页Guangdong Agricultural Sciences

基　　金：贵州省教育厅高校人文社会科学研究项目(10zc123);贵州省社会发展与科技攻关计划项目(SY[2013]3171)

摘　　要：以连霍高速中牟段3断面表层土壤为对象,探讨不同重金属元素的扩散特点、土壤重金属污染程度及来源识别,旨在为土壤修复、无公害农产品基地建设提供依据。采用国家标准方法测定重金属含量,应用SPSS10.0、CorelDRAW12等软件进行数据统计与作图。结果表明:公路旁土壤出现了不同程度的重金属积累,污染水平总体上维持在Ⅱ和Ⅲ级水平;不同的重金属扩散能力不同,且同种元素在不同宽度、郁闭度的防护林带下被抑制程度亦不相同;成土母质及农业活动对该区域土壤Zn、Cu和Cr含量贡献最大,其中有机肥的施用对Cu的累积作用明显,Pb与Cd主要来自于高速公路的影响。Three soil sections of Lian-Huo expressway were studied in Zhongmou county.The aim was to study diffusion characteristics of different heavy metal elements,the degree of soil heavy metal pollution and source identification to make some proposals to soil remediation and Pollution-free agricultural products base.Some experiments were taken to examine soil heavy metals by national standard methods.The software of SPSS10.0 and CorelDWAW12 were used for analysing data and illustrating results.Results showed that roadside soil had been polluted in Ⅱ and Ⅲ Pollution degrees.The dispersion capacity of each metal was different to each other.The effect was different of each plant barrier in prevention adjacent soil from pollution.Soil parent material and agricultural activities was the largest contribution on Zn,Cu and Cr content of soil.Application of organic manure was significant for cumulative effect of Cu.Pb and Cd was mainly from the expressway.

关 键 词：公路 表层土壤 重金属 来源识别 主成分 

分 类 号：S151.9[农业科学—土壤学] X131.3[农业科学—农业基础科学]