灌溉排水学报2017，Vol.36Issue(8)：77-82,6.DOI:10.13522/j.cnki.ggps.2017.08.013
重金属污染对土壤介电特性的影响规律研究
Study of the Impact of Heavy Metals Contamination on Dielectric Properties of Soils
摘要
Abstract
Dielectric properties of soils are the basis for using the high frequency geophysical equipment and ground penetrating radar to assesse and evaluate heavy metals incontaminated soils.Taking chromium (Cr),cadmium (Cd) and lead (Pb) as examples,this paper investigated the change in dielectric constants of three soil samples-fine sand,silt and clay-using a dielectric constant instrument under different soil moisture contentafter adding Cr,Cd and Pb at different concentrations to the three soil samples.We analyzed the effect of Cr,Cd and Pb concentration,soil moisture,as well as soil particle size gradation on the dielectric constant.The results showed that without metal pollution,the dielectric constants of the three soils depended mainly on moisture and particle size gradation.After adding Cr,Cd and Pb,the dielectric constants of the soils increased significantly,especially when the soil moisture was higher than 20％.The dielectric constant is sensitive to soil texture,increasing with clay and silt contents.Therefore,the high frequency geophysical equipment and ground penetrating radar are more effective for detecting heavy medals in fine-texture soils dominated by clays and/or silts.关键词
土壤/重金属/污染/介电常数/土壤含水率Key words
soil/heavy metal/pollution concentration/dielectric constant/soil moisture分类
农业科技引用本文复制引用
乔翠平,赵贵章,刘少康,高菁,赵明星,杨柳..重金属污染对土壤介电特性的影响规律研究[J].灌溉排水学报,2017,36(8):77-82,6.基金项目
国家自然科学基金项目(41372260,41202178) （41372260,41202178）
中国科学院流域地理学重点实验室开放基金项目(WSG2015004) （WSG2015004）
河南省高校科技创新人才支持计划项目(13HASTIT035) （13HASTIT035）
