文档介绍：Study of cadmium adsorption and desorption by
simulant acid rain on different silicate clay
minerals in soil
Xiaping Zhu
College of material & chemistry & chemical engineering
Chengdu University of Technology
Chengdu China
E-mail: ******@cdut.
Abstract-The cadmium adsorption and desorption by simulant acid most important chemical properties of soil, and are the reasons
that soil has a certain self-purification capacity and
rain on different clay minerals in soil have been discussed. When the environmental capacity to heavy metal [1]. For certain metal
pH value is 7, adsorption time is 1h, and the medium is -1 ion, such as cadmium, the ability of adsorption and ion
exchange of soil depend on position, content and form
KNO3, the saturated adsorption capacity of cadmium on of the soil solid phase material (which is mainly clay mineral).
montmorillonite, illite, and sepiolite is found to be ,, Acid rain is a global disaster, it can acidify soil and change the
mg/g respectively, but on kaolinite nothing is found. A correlation physical and chemical properties of soil, affect plant growth,
accelerate the rate of cation leaching[2-3]. It also activates
analysis shows that the saturated adsorption capacity of cadmium on cadmium and other heavy metals in the soil [4]. Therefore, the
silicate clay minerals are r