Adsorption of Chloride Anion by Calcined Mg-Al-Fe Layered Double Hydroxides in Wastewater

Wan You Zhang; Ying Liu; Li Juan Xi

doi:10.4028/www.scientific.net/AMM.423-426.545

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 423-426Adsorption of Chloride Anion by Calcined Mg-Al-Fe...

Adsorption of Chloride Anion by Calcined Mg-Al-Fe Layered Double Hydroxides in Wastewater

Abstract:

Mg-Al-Fe layered double hydroxides (LDHs) were prepared by coprecipitation method and calcined hydrotalcite (CLDH) was applied to remove chloride anion from wastewater. The influences of calcination temperature, adsorption temperature, adsorption dosage, pH on the removal of chloride have been investigated. The optimum temperature and range of pH were obtained in the experiments and the adsorption capacity reached the highest when the temperature was 30 °C and the pH was 5~11. The residual chloride anion was found to be 2 mg/L with an initial concentration of 100 mg/L. The maximum adsorption capacity was obtained at the LDH calcination temperature of 500 °C. Characterizations of the LDHs were performed using XRD and SEM.