Distribution, Morphologic Analysis and Characterization of Cadmium in Different Contaminated Soil Particle Sizes

Abstract

In this study, five soil particle sizes from the Liupanshui City and in Jiyuan City contaminated soils were separated by the physical screening method. The effects of particle sizes on distribution, morphologic analysis and characterization of soil Cd were investigated by BCR continuous extraction, principal component analysis (PCA), X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR). The results showed that soil Cd content in fine particle size (<0.15mm) was higher, especially the acid-extracted Cd content in LPS soil and the residual content Cd in JY soil increased obviously with the decrease of particle size. Meanwhile, pyrite was found in soil particle size of LPS soil; However, these characteristics were not found in JY soil, indicating that the former soil was rich in Fe and sulfide elements, which was easy to enrich sulfide or heavy metals.