开阳县耕地土壤重金属元素地球化学特征及其成因分析  

Geochemical Characteristics of Heavy Metal Elements in Cultivated Soil in Kaiyang County and Analysis of Their Causes

作　　者：何承真 郭永福 周国正[1] HE Chengzhen;GUO Yongfu;ZHOU Guozheng(Team 159,Guizhou Bureau of Coalfield Geology,Guiyang 550081,China)

机构地区：[1]贵州省煤田地质局一五九队,贵阳550081

出　　处：《中国资源综合利用》2021年第6期22-26,共5页China Resources Comprehensive Utilization

基　　金：黔地矿耕调2017-01;黔地矿耕调2017-02项目。

摘　　要：本次研究在开阳县采集耕地土壤样6836件、异常查证土壤样120件、土壤剖面3条和成土母岩样3件。耕地土壤重金属元素含量变化范围较大,Cu、Zn、As、Cd、Cr、Hg、Ni、Pb和Tl含量平均值比中位值和背景值高,存在明显的As-Hg、Pb和Cd高值异常区。根据实地采样情况分析,耕地土壤重金属含量异常由农业生产、交通运输和污水灌溉等人为因素引起的可能性较小。As-Hg异常区、Pb异常区和Cd异常区重金属异常主要由地层重金属元素含量高引起,As-Hg异常区也可能受矿业活动影响。In this study,6836 soil samples,120 verified abnormal soil samples,3 soil profiles and 3 soil forming rock samples were collected from cultivated land in Kaiyang County,Guizhou Province.The content of heavy metals elements in soil of cultivated land varied widely,and the average contents of Cu,Zn,As,Cd,Cr,Hg,Ni,Pb and Tl were all higher than the median and the background value,and there were obvious abnormal areas with high values of As-Hg,Pb and Cd.According to the analysis of the field sampling,the possibility of heavy metal anomalies in cultivated soil caused by human factors such as agricultural production,transportation and sewage irrigation is small.The As-Hg abnormal zone,Pb abnormal zone and Cd abnormal zone are mainly caused by the high content of heavy metals in the formation,while the As-Hg abnormal zone may also be affected by mining activities.

关 键 词：耕地土壤 重金属元素 异常成因 

分 类 号：X53[环境科学与工程—环境工程]