Abstract：
This study is on the outskirts of the rapidly growing city of Jaipur, located in the semiarid region of India and gateway to the \'Great Indian Thar\' desert, and focused on potentially toxic elements (PTE) pollution in the farmlands around the city. Concentrations of PTE, along with associated soil parameters such as pH, available nitrogen, organic carbon, phosphorus, and potassium, were estimated in agricultural soil samples near an industrial region on the outskirts of the capital city of the largest state of India. The PTE concentrations in the soil were in the following order: Mn > Pb > Ni > Cr > Cu > Cd. Soil pollution indices, such as the geochemical accumulation index (Igeo), contamination factor (CF), and ecological risk index (ERI), indicated that the soil was moderately to highly polluted. The result of BCR extraction techniques showed Cd is found mainly in the exchangeable and residual fractions, Pb, Mn were found in the reducible as well as residual fractions, while other PTE were mostly bound to residual fraction. All other PTEs are primarily found in the residual fraction, tightly linked with the silicate lattice of soil minerals. Multivariate analysis and the Pearson correlation matrix indicate a common source apportionment for Pb and Cd. Cd, and Pb concentrations in agricultural soil indicate ecological harm that warrants immediate attention and policy-level intervention.
摘要：
这项研究是在快速发展的斋浦尔市的郊区进行的，位于印度半干旱地区，通往“大印度塔尔”沙漠的门户，并专注于城市周围农田的潜在有毒元素（PTE）污染。PTE的浓度,以及相关的土壤参数，如pH值，可用氮气,有机碳,磷，钾，在印度最大州首府郊区的工业区附近的农业土壤样本中进行了估算。土壤中的PTE浓度依次为：Mn>Pb>Ni>Cr>Cu>Cd。土壤污染指数，如地球化学积累指数(Igeo)，污染因子（CF），和生态风险指数(ERI)，表明土壤受到中度到高度污染。BCR提取技术的结果表明，Cd主要存在于可交换部分和残留部分中，Pb,Mn存在于可还原部分和残余部分中，而其他PTE大多与残留部分结合。所有其他PTE主要存在于残余部分中，与土壤矿物的硅酸盐晶格紧密相连。多变量分析和Pearson相关矩阵表明铅和镉的常见来源分配。Cd,农业土壤中的铅浓度表明生态危害，值得立即关注和政策层面的干预。
