论文部分内容阅读
团聚体是土壤结构的基本单元,直接影响着重金属在土壤微环境中的空间分异性。不同粒径团聚体的组成结构和比表面积有所差异,因此重金属在其中的富集情况也存在差异。传统方法以全土为研究对象,对土壤中重金属的富集情况进行研究,而忽略了不同团聚体颗粒对重金属吸附迁移的影响,使得研究结果与实际土壤情况存在差异。本文以土壤团聚体的粒径大小为区分标准,从城市土壤、农业土壤、林地和荒地以及沉积物四个方面,对不同类型土壤团聚体颗粒的粒径分布以及不同粒径团聚体中重金属的富集特征进行综述,为相关研究提供参考。
Aggregates are the basic unit of soil structure and directly affect the spatial heterogeneity of heavy metals in soil microenvironment. Different particle size aggregates structure and specific surface area vary, so there are differences in the enrichment of heavy metals in them. The traditional method takes the whole soil as the research object to study the enrichment of heavy metals in the soil, while neglecting the influence of different agglomerate particles on the adsorption and migration of heavy metals, making the difference between the research results and the actual soil conditions. In this paper, the size of soil aggregates is used as the standard of distinction. From the aspects of urban soil, agricultural soil, woodland, wasteland and sediment, the particle size distribution of different types of soil aggregates and the distribution of heavy metals Enrichment characteristics are summarized for reference to provide relevant research.