期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：310
期号：5
页码：1-6
DOI：10.1088/1755-1315/310/5/052051
出版社：IOP Publishing
摘要：In this paper, the Cd-contaminated soils in the eastern suburbs of Tianjin were divided into seven grain classes(I-VII). The distribution characteristics of soil grain size were analyzed. The soil content of 40-60 mesh and less than 160 mesh was the highest. The two grain size soils were about 50% in total, and the soil of 140-160 mesh rank had the lowest content, with the maximum content not exceeding 1%. The distribution characteristics of chemical forms of Cd in soils with different grain sizes were analyzed, which were divided into weak acid extractable, reducible, oxidizable and residual forms. The results showed that Cd mainly existed in the weak acid extractable form and the reducible form. The highest Cd concentration was found in 120-140 mesh, followed by 40-60 mesh.
