Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1.

ABSTRACT: Two cyclodextrins (CDs), γ- and hydroxypropyl (HP)-γ-CDs were used to synthesize new adsorbents by using epichlorohydrin (EPI) as cross-linking agent in order to remove Direct Red 83:1 (DR) from water. Both polymers were characterized in terms of Fourier spectroscopy, nuclear magnetic resonance, particle size distribution and thermogravimetric analysis. Experimental data for both polymers were well fitted to the pseudo-second order and intraparticle diffusion model, indicating that in the adsorption both chemical and physical interactions are essential in the removal of DR. Three different isotherm models were analyzed, concluding that γ-CDs-EPI followed the Temkin isotherm and HP-γ-CDs-EPI the Freundlich isotherm, these results suggested that the adsorption was happening onto heterogeneou

SUBMITTER: Pellicer JA 

PROVIDER: S-EPMC7576497 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature