Fast and highly efficient adsorption of cationic dyes by phytic acid crosslinked β-cyclodextrin

Yao Li; Erlei Yu; Suning Sun; Wenbo Liu; Rui Hu; Liang Xu

doi:10.1016/j.carbpol.2022.119231

Fast and highly efficient adsorption of cationic dyes by phytic acid crosslinked β-cyclodextrin

Carbohydr Polym. 2022 May 15:284:119231. doi: 10.1016/j.carbpol.2022.119231. Epub 2022 Feb 8.

Authors

Yao Li¹, Erlei Yu², Suning Sun¹, Wenbo Liu¹, Rui Hu³, Liang Xu⁴

Affiliations

¹ Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China.
² Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China. Electronic address: yuerlei120@163.com.
³ Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China. Electronic address: estellehu0427@163.com.
⁴ Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China. Electronic address: xuliang4423@163.com.

PMID: 35287922
DOI: 10.1016/j.carbpol.2022.119231

Abstract

In this study, a novel adsorbent (PA-β-CD) capable of fast and efficient adsorption of cationic dyes was successfully prepared by the poly-condensation reaction of phytic acid (PA) and β-cyclodextrin (β-CD). Results showed that PA-β-CD exhibited high adsorption capacities of 1095, 2005.58, 1736.32, and 1930.23 mg/g for methylene blue (MB), basic green 4 (MG), astrazon pink FG (FG), and crystal violet (MV), respectively. In addition, the adsorption of cationic dyes on PA-β-CD was very fast, and most of cationic dyes were adsorbed in the first 2 min. Moreover, PA-β-CD could selectively adsorb the cationic dye from a cationic/anionic dye mixture. Adsorption data revealed that the adsorption kinetics fitted the pseudo-second-order model well, and the isotherms were well described by a Langmuir isotherm model. The regeneration efficiency of the adsorbent remained above 90% after the fifth cycle. The present work confirmed that PA-β-CD shows great potential in the treatment of dye wastewater.

Keywords: Cationic dye; Cyclodextrin; Fast adsorption; Phytic acid.