화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.11, No.6, 841-846, November, 2005
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Adsorption of Chromate by Cationic-Surfactant-Modified FAU and MCM-41 Molecular Sieves
Hyun Joung Ku, Byoung Joon Ahn†, Byoung Eun Jeon, and Wonghil Chang1, †
  • Department of Chemistry Education, Chonbuk National University, Chonju 561-756, Korea
  • 1Department of Chemistry, Jeonju University, Jeonju 560-759, Korea
E-mail:,
Adsorption of chromate anions was performed using cetyltrimethylammonium bromide (CTABr) modified FAU and MCM-41 molecular sieves. Because the CTA ion is too large to enter into the internal surface of faujasite (FAU), the adsorption of the ammonium ion occurred only on the external surface. On the other hand, the pore sizes of MCM-41 are large enough to accommodate this cationic surfactant. These materials were characterized using XRD, TG, SEM, EDX, and nitrogen adsorption and desorption data. While the unmodified FAU and unmodified MCM-41 had no affinity for chromate anions, the surfactant-modified molecular sieves exhibited significantly enhanced efficiencies for the removal of the oxyanion from aqueous solution . The adsorption of chromate on the surfactant-modified molecular sieves seems to result from a combination of entropic, Coulombic, and hydrophobic effects.
Keywords:chromate adsorption;CTABr-modified FAU;CTABr-modified MCM-41;surfactant;MCM-41
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