College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, PR China.
College of Earth Science, Guilin University of Technology, Guilin 541006, PR China.
J Hazard Mater. 2022 Feb 15;424(Pt A):127308. doi: 10.1016/j.jhazmat.2021.127308. Epub 2021 Sep 22.
A large-scale investigation was conducted on the cadmium (Cd) content in the farmland soils of Guizhou to explore the spatial variation in soil Cd content, identify the main factors responsible for causing Cd pollution, and determine the zonation of Cd pollution. Multivariate statistical analysis, geographic information system (GIS) analysis, and decision tree methods were used to study the distribution, spatial variation, and pollution partitioning of Cd and the factors influencing the Cd accumulation in agricultural soils of the Guizhou province. Areas with high Cd content in agricultural soil were found to be concentrated in the high-altitude areas in the western region of Guizhou province. The results of the single factor pollution index showed that the proportion of sample sites with Cd class I (priority protection), II (security utilization), and III (strict control) in the agricultural soils of Guizhou province were 65.96%, 31.27%, and 2.77%, respectively. In high-altitude areas, the Cd content in the agricultural soils was mainly derived from the soil parent material. In contrast, mining activities and road traffic were the main factors Cd accumulation in agricultural soils in lower altitude areas.
对贵州省农田土壤中的镉（Cd）含量进行了大规模调查，以探讨土壤 Cd 含量的空间变异性，确定导致 Cd 污染的主要因素，并确定 Cd 污染的分区。采用多元统计分析、地理信息系统（GIS）分析和决策树方法，研究了 Cd 的分布、空间变异性和污染分区，以及影响贵州省农业土壤中 Cd 积累的因素。发现农业土壤中高 Cd 含量的地区集中在贵州省西部地区的高海拔地区。单因子污染指数的结果表明，贵州省农业土壤中 Cd 类 I（优先保护）、II（安全利用）和 III（严格控制）的样本点比例分别为 65.96%、31.27%和 2.77%。在高海拔地区，农业土壤中的 Cd 含量主要来源于土壤母质。相比之下，采矿活动和道路交通是低海拔地区农业土壤中 Cd 积累的主要因素。
