Distribution and Influence Factors of Cd Speciation on the Soil with Different Properties

The Cd speciation distribution in the soil with different properties,the relationship of different speciation of Cd and the relationship between Cd speciation and properties of soil have been studied through hydride generation-atomic fluorescence spectrometry and SPSS statistical software.The results showed that 12 kinds of soil samples were polluted with Cd in the 15 kinds of samples.A significant linear correlation between available Cd and total Cd was found.The exchangeable Cd was the dominating speciation in the samples and the variability of each speciation was greatly.Some relationship between each speciation was also found.The availability was the comprehensive expression for each speciation.The Cd speciation was influenced by the environmental conditions more strongly than by the chemical composition.pH was the dominant factor and the organic matter was the second one.