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KMID : 0385520110240040275
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Analytical Science & Technology
2011 Volume.24 No. 4 p.275 ~ p.281
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Analysis of adsorption behavior of lead ion on to surface modified AlPO₄ materials
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Kim Young-Ho
Kil Hyun-Suk
Kang Kwang-Cheol
Choi Suk-Nam
Rhee Seog-Woo
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Abstract
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AlPO4-type material was synthesized by a reaction of Al(OH)₃ and H₃PO₄ with organic templates from wastewater of detergent manufacturer. The surface of material was coated with carboxylate groups by the reaction of succinic anhydride with surface amino groups which were formed by treatment of the material with APTMS. Powder XRD patterns showed the characteristic patterns of AlPO₄. Morphology of the material was examined using a SEM and the functional groups were investigated by FT-IR analysis. The surface charge of a aqueous suspension was analyzed: AlPO4-NH₂ has positively charged surface while AlPO4-COOH has negatively charged one. They were used for the removal of toxic metals from aqueous solution. The lead ions were adsorbed on the surface by the formation of complexes with carboxylate of surface and Kd was 91.1 mL/g. In conclusion, the AlPO4-COOH might be applicable in the removal of toxic metal ions from aqueous system.
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KEYWORD
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AlPO₄, ion-exchange, lead, surface charge, complex formation
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