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- W2054308959 abstract "Abstract Cadmium adsorption and desorption on a synthetic hydroxyaluminosilicate-montmorillonite (HAS-Mt) complex were investigated in comparison with a montmorillonite (Mt) and hydroxyaluminum-montmorillonite (HyA-Mt) complex. Kinetics studies of Cd adsorption on Mt, HyA-Mt and HAS-Mt complexes were conducted at pH 5.0, using a 10-7 M Cd(NO3)2 solution in a solid to solution ratio of 100 mg to 100 mL. After 240 min reaction, 94, 88, 32% of the added Cd were removed from the solutions of the Mt, HyA-Mt, and HAS-Mt systems, respectively. Considering the magnitude of the cation exchange capacity of the clay and complexes, affinity of Cd ions was highest for the HAS-Mt complex. Desorption experiment was conducted using 1 M KC1, 1 M KNO3, and water. The desorption rate of Cd sorbed on the Mt was the highest, 90 and 59%, using KC1 and KNO3, respectively, while, that on the HyA-Mt and HAS-Mt was around 30% and much lower than in the case of Mt, using both chemical reagents. Water could not desorb the adsorbed Cd at all. The difference in the desorption rate between KC1 and KNO3 was due to the complex ion formation of Cd with the anionic species. The adsorption of Cd by Mt varied with the nature of intercalated materials, namely, HyA and HAS. The extent of the desorption of Cd decreased due to intercalation of HAS and HyA. In the soil environment, Mt is commonly intercalated with HyA and/or HAS. Our data indicated that the formation of HyA- and HyA-Mt complexes should lead to Cd accumulation in soil environments. In addition, the application of potash (KC1) fertilizer would enhance the desorption of the Cd accumulated in soils." @default.
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- W2054308959 date "1996-09-01" @default.
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- W2054308959 title "Influence of potassium chloride on desorption of cadmium sorbed on hydroxyaluminosilicate-montmorillonite complex" @default.
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- W2054308959 doi "https://doi.org/10.1080/00380768.1996.10416316" @default.
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