Characteristics of heavy metals in soils under different land use in a typical karst area, Southwest China

作     者：Yang Tang Guilin Han 

作者机构：The State Key Laboratory of Environmental GeochemistryInstitute of Geochemistry Chinese Academy of Sciences School of Scientific Research China University of GeosciencesBeijing 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2017年第36卷第3期

页      面：515-518页

核心收录：

学科分类：082803[工学-农业生物环境与能源工程] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0828[工学-农业工程] 0708[理学-地球物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41325010 41403109) National Key Basic Research Program of China(Grant No.2013CB956703) 

主　　题：土地利用方式 土壤剖面 喀斯特地区 中国西南 重金属 污染元素 土壤有机碳 有机碳含量 

摘      要：This study investigated the distribution of six pollutant elements(Cr, Cu, Pb, Zn, Cd, and As), and their relationship to soil organic carbon(SOC) in five soil profiles in the Puding area. Results show SOC content decreased exponentially to the depth of soil profiles; the vertical distribution patterns of SOC in soil profiles were partially controlled by land use. The concentrations of these pollutant elements in most soils were lower than background values, indicating that the local soil was less likely to be contaminated by foreign inputs. Geo-accumulation index values of these elements in most soil samples were less than 1, suggesting that the soil of this area may not be polluted. The concentrations of Cr, Cu, As, and Zn in soils from all land use types were significantly negatively correlated with SOC contents. Geochemical approaches confirmed that the soil of this area was less influenced by pollutant elements.