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《Journal of the Chinese Ceramic Society》 2007-06
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EFFECT OF SYNTHESIS CONDITIONS AND CHARACTERISTICS OF THE MCM-41 MESOPOROUS MATERIALS ON ADSORPTION OF CADMIUM ION

YANG Jing1,MA Xiaoguang 1,FROST Ray L 2(1.School of Materials,China University of Geosciences,Beijing 100083,China;2.Inorganic Materials Research Program,School of Physical and Chemical Sciences,Queensland University of Technology,GPO Box 2434,Queensland 4001,Australia)  
The ordered mesoporous material MCM-41 was synthesized by a hydrothermal method using fumed silica,sodium hydroxide(NaOH)/tetraethyl ammonium hydroxide(TEAOH)/hydrogen chloride(HCl)and cetyl trimethl ammonium bromide(CTAB).The three synthesized mesoporous material MCM-41 samples as MCM-41-N,MCM-41-T and MCM-41-H were characterized by X-ray diffraction and N2 adsorption-desorption.The results show that mesoporous material MCM-41 synthesized in acid conditions has larger pore size than the two others.Moreover,mesoporous material MCM-41 samples were used to treat cadmium ion(Cd2 +)-containing wastewater.The amounts of Cd 2+adsorbed onto mesoporous material MCM-41 samples were studied in different adsorbent amounts and with different pH values.The results show that the adsorption rate can be improved by increasing the pH value of the Cd2 +-containing solution.When the pH value is from 7.0 to 8.0,the Cd 2+adsorption rate of the MCM-41-T is from 35.65%to 62.15%;the Cd2 +adsorption rate of the MCM-41-N is from 38.80%to 69.40%;and the Cd 2+adsorption rate of the MCM-41-H is from 50.22%to 73.47%.The MCM-41-H synthesized in acid solution can reach to the highest adsorption rate(89.56%)and adsorption amount(8.57 mg/g)because it has the largest pore size.According to the results,the pore size of mesoporous material MCM-41 and the pH value of the initial Cd2 +solution are the key factors that affect the adsorption rate.Therefore,the pore size of mesoporous ma-terial MCM-41 should be increased to improve the adsorption rate of Cd2 +.
【Fund】: 教育部留学回国人员科研启动基金(2-2-03-07);; 澳大利亚QUT访问基金(2003)资助项目
【CateGory Index】: TQ028.15
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