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《Chinese Journal of Inorganic Chemistry》 2009-12
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Adsorption of Acid Red 88 from Aqueous Solution by Calcined Layered Double Hydroxides

WANG Qiao-Qiao NI Zhe-Ming ZHANG Feng MAO Jiang-Hong YAO Ping LIU Xiao-Ming (College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032)  
The removal of acid red 88(AR88), an anionic dye, from aqueous solution by calcined Mg/Al LDHs(LDO) was investigated. The effect on the decolorization rate of AR88 was studied of initial dye concentration, amount of adsorbent, initial pH values, temperature and competitive anions. The solid LDO, both fresh and after removal of AR88, was characterized by XRD and infrared spectroscopy. The results of adsorption indicate that LDO could be used to remove high concentration anionic dyes and the maximum capacity of AR88 at equilibrium (Qe) and percentage of adsorption(η/%) with a fixed adsorbent dose of 1.0 g·L-1 are found to be 1 999.0 mg·g-1 and 99.95%, respectively, when AR88 concentration, temperature, pH value are 2 000 mg·L-1, 288 K, and 10~11, respectively. The removal rate of AR88 is above 90% for LDO after four cycles indicating the feasibility of LDO regeneration.
【Fund】: 浙江省自然科学基金(No.Y406069)资助项目
【CateGory Index】: X791
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