Adsorption behavior of aromatic carboxylic acids on a cyclodextrin-based metal-organic framework

Nagai Anna, . and Michida Wataru, . and Sakuragi Mina, . and Nishida Masashi, . and Guan Guoqing, . and Abudula Abuliti, . and Kusakabe Katsuki, . Adsorption behavior of aromatic carboxylic acids on a cyclodextrin-based metal-organic framework. pp. 17-23. ISSN 2289-1692

A cyclodextrin-based metal-organic framework (CD-MOF) was crystallized by methanol vapor diffusion. The performance of CD-MOF was compared with commercial available adsorbents (faujasite zeolite activated carbon and activated clay) for the adsorption of ferulic acid at 298 K in methanol. The adsorption behavior of aromatic carboxylic acids on the CD-MOF was also investigated. The initial adsorption rate of ferulic acid in methanol on the CD-MOF was lower than that for activating carbon and faujasite zeolite due to the alternating passage of ferulic acid through hydrophilic pore and hydrophobic pore in CD-MOF. The saturated adsorption amount on the CD-MOF was highest among those on the other adsorbents. The high adsorption amount was obtained for aromatic carboxylic acids with high values of pKa(W). A single saturation state of benzoic acid on the CD-MOF was obtained at a concentration of more than 1.0 mmol/L. The molar ratio of benzoic acid to the (-CD)6 unit was evaluated to be 4.4 from the saturated adsorption amount.

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Abstract

A cyclodextrin-based metal-organic framework (CD-MOF) was crystallized by methanol vapor diffusion. The performance of CD-MOF was compared with commercial available adsorbents (faujasite zeolite activated carbon and activated clay) for the adsorption of ferulic acid at 298 K in methanol. The adsorption behavior of aromatic carboxylic acids on the CD-MOF was also investigated. The initial adsorption rate of ferulic acid in methanol on the CD-MOF was lower than that for activating carbon and faujasite zeolite due to the alternating passage of ferulic acid through hydrophilic pore and hydrophobic pore in CD-MOF. The saturated adsorption amount on the CD-MOF was highest among those on the other adsorbents. The high adsorption amount was obtained for aromatic carboxylic acids with high values of pKa(W). A single saturation state of benzoic acid on the CD-MOF was obtained at a concentration of more than 1.0 mmol/L. The molar ratio of benzoic acid to the (-CD)6 unit was evaluated to be 4.4 from the saturated adsorption amount.

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Item Type:	Article
AGROVOC Term:	Adsorption
AGROVOC Term:	Aromatics (chemical compounds)
AGROVOC Term:	Cyclodextrins
AGROVOC Term:	Adsorbents
AGROVOC Term:	Methanol
AGROVOC Term:	Acids
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24653

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