Abstract
Research on cadmium pollution has received increasing international attention inasmuch, as cadmium is toxic and can cause severe human health problems such as kidney disorder and itai-itai disease. The influence of residence time and organic acids on Cd desorption from pure goethite has been studied. However, pure iron oxides rarely exist in natural environments. The desorption kinetics of Cd from iron oxides, which are formed under the influence of organic acids such as citric acid, a common organic ligand in soil rhizosphere, still remains to be uncovered. The chapter aims to examine the desorption kinetics of Cd following its adsorption on iron oxides. To simulate the effects of organic ligands in soil rhizosphere environment and chloride-bearing fertilizer, Cd desorption caused by citrate, acetate, and chloride is investigated.
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