부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.micromeso.2005.09.002 Byline: Z. Mehraban, F. Farzaneh Keywords: Chlorophyll-a; [beta]-carotene; MCM-41; Zeolites; Selective separator Abstract: In this work, microporous (zeolite A, X and HS) and mesoporous (MCM-41, F-MCM-41 and MCM-48) silicate materials were used as adsorbents to separate the chlorophyll-a (Chl-a) from the mixture of Chl-a and [beta]-carotene ([beta]-Car). The adsorbent capacities were determined to be MCM-41[approximately equal to]MCM-48F-MCM-41zeolite Xzeolite Azeolite HS. It was found that the mesoporous MCM-41 and MCM-48 selectively adsorb the Chl-a from [beta]-Car. The adsorbed Chl-a on MCM-41 can be extracted by polar MeOH solvent. No degradation of MCM-41 was observed during the course of separation process. Powder X-ray diffraction (XRD) analysis and N.sub.2 adsorption-desorption isotherm experiments showed that the well ordered hexagonal structure of MCM-41 is present and surface area, pore volume and pore diameter have been decreased after adsorption. Author Affiliation: Department of Chemistry, University of Alzahra, Vanak, Tehran 1993891176, Iran Article History: Received 31 October 2004; Revised 4 September 2005; Accepted 7 September 2005