Clay Minerals as a Feasible Additive to Stabilize Cadmium in Contaminated Soils

Zhen Qi Hu; Xiu Hong Yang; Ying Chun Zhang

doi:10.4028/www.scientific.net/KEM.336-338.1906

Paper Titles

Sialite Technology and Cycle Economy
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Preparation and Characterization of Porous Cordierite Ceramics from Coal Fly Ash
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Photo-Catalytic Properties of Ceramic Coating of TiO₂
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Microporous Ceramics Made by Silicon Carbide Whiskers
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Clay Minerals as a Feasible Additive to Stabilize Cadmium in Contaminated Soils
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Preparation and Photocatalytic Performance of Ag-Doped Titanium Dioxide Whiskers
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A Novel Hydroxyapatite Carrier for Enrichment of Hydrocarbon Degradation Bacteria
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Practice of Simulation to Formation of Rock Theory
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Effect of Deposition Conditions on TiO₂ Thin Film on Silica Glass Fibers by Liquid Phase Deposition
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Clay Minerals as a Feasible Additive to Stabilize Cadmium in Contaminated Soils

Abstract:

The adsorption behavior of clay minerals in cadmium contaminated soils has been studied in order to remedy soils contaminated with this metal in this work. The results show that Langmuir model best describes the adsorption of Cd2+, and the maximum sorption values of 8.45 mg/g for bentonite, 5.69mg/g for sepiolite and 10.57mg/g for attapulgite are obtained at pH 5-6. In addition, the effect of clay minerals amendment on a highly cadmium contaminated soil has been studied by means of pot experiments. The results indicate that the metal concentrations in shoot and root of plant decreased with addition of clay minerals to soil (1%), and the highest decrease value of metal concentrations is obtained in the soils added by attapulgite amendment.