Abstract

To provide technical support and theoretical guarantee for the prevention and control of soil heavy metal pollution, the main types of topsoil and parent material in Jilin Province were systematically collected, accurately tested by atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry, and comprehensively evaluated through five indexes. By principal component analysis, it was initially judged that there were 2 or 3 major heavy metal sources in topsoil, which could be attributed to the parent material, soil-forming process, and/or anthropogenic factor. The pH of surface soil mainly depended on its parent material, and changed to a certain extent during its formation. The contents of heavy metals As, Hg, Cd, Cr, Cu, Ni, Pb, and Zn in surface soils were both significantly influenced by parent materials and soil-forming processes. Here the geo-accumulation index calculated by corresponding background value of parent material was more suitable for pollution assessment than the other four indexes, and the heavy metal contamination degree in each type of soil basically followed the order: Hg > Cd > Cu, Pb, Zn, As > Cr, Ni. Furthermore, the heavy metal contamination level in the types of soils was ranked as follows: cambisol, phaeozem > podzol, planosol > chernozem. The health risk assessment indicated that the soil in the study area had no significant carcinogenic or non-carcinogenic risks. Excluding the influence of parent material and soil-formation process, the comprehensive evaluation of soil heavy metal pollution will be more reasonable.

摘要

为预防和控制土壤重金属污染提供技术支持和理论保证，系统地收集了吉林省表土和主要物质的主要类型，通过原子荧光光谱法和电感耦合等离子体质谱法进行了准确测试，并通过五个指标。通过主成分分析，最初判断表层土壤中有2或3种主要重金属来源，这可能归因于母体材料，土壤形成过程和/或人为因素。表层土壤的pH值主要取决于其母体，并在其形成过程中发生了一定程度的变化。重金属的含量As，Hg，Cd，Cr，Cu，Ni，Pb，表层土壤中的锌和锌均受母体材料和土壤形成过程的显着影响。在这里，由母体的相应背景值计算出的地质累积指数比其他四个指数更适合污染评估，并且每种土壤中的重金属污染程度基本上遵循以下顺序：Hg> Cd> Cu，Pb，锌，砷>铬，镍。此外，对土壤类型中的重金属污染水平进行了如下排序：坎比索尔，phaeozem> podzol，planosol> chernozem。健康风险评估表明，研究区域的土壤没有明显的致癌或非致癌风险。排除母体材料和土壤形成过程的影响，对土壤重金属污染的综合评价将更为合理。在这里，由母体的相应背景值计算出的地质累积指数比其他四个指数更适合污染评估，并且每种土壤中的重金属污染程度基本上遵循以下顺序：Hg> Cd> Cu，Pb，锌，砷>铬，镍。此外，土壤类型中的重金属污染水平排名如下：坎比索尔，phaeozem> podzol，普莱索尔> chernozem。健康风险评估表明，研究区域的土壤没有明显的致癌或非致癌风险。排除母体材料和土壤形成过程的影响，对土壤重金属污染的综合评价将更为合理。在这里，由母体的相应背景值计算出的地质累积指数比其他四个指数更适合污染评估，并且每种土壤中的重金属污染程度基本上遵循以下顺序：Hg> Cd> Cu，Pb，锌，砷>铬，镍。此外，对土壤类型中的重金属污染水平进行了如下排序：坎比索尔，phaeozem> podzol，planosol> chernozem。健康风险评估表明，研究区域的土壤没有明显的致癌或非致癌风险。排除母体材料和土壤形成过程的影响，对土壤重金属污染的综合评价将更为合理。