摘要：We investigated the distribution of seven forms of heavy metals (As, Cd, Cr, Cu, and Zn) in Handan and Xingtai soils and calculated the geoaccumulation index and the potential ecological risk index, with the aim to assess the potential risk induced by heavy metals in the soil. The average heavy metal concentrations were all below the values stated for Level I of the State Soil Environmental Quality Standards, except for Cd, whose average concentration (0.22 g/kg) exceeded the threshold level. Heavy metals were mainly present in the residual form, with small proportions as available forms. The forms were considerably affected by soil pH, organic matter, and total heavy metal concentrations. Overall, the potential ecological risk index was 79.17, which is below the RI limit of 150. However, the potential risk of Cd was at a medium level. Based on our results, the soils of the study region are not contaminated with the evaluated heavy metals.
关键词：Handan and Xingtai;soil;heavy metals;form distribution;potential ecological risk
