Affiliation:
1. College of resources and environment , Jilin Agricultural University , Changchun 130000 , China
2. Department of Pharmaceutical Chemistry, University of Isfahan , Isfahan , Iran
Abstract
Abstract
Polyvinyl alcohol (PVA), acrylic acid (AA), and β-cyclodextrin (β-CD) were used as monomers, and ammonium persulfate was used as an initiator. Orthogonal tests were optimized the experimental condition, and aqueous polymerization was used to prepare poly-β-cyclodextrin/polyvinyl alcohol/polyacrylic acid (β-CD/PVA/PAA) hydrogel. The samples were characterized by FT-IR (Fourier transform infrared), SEM (Scanning electron microscopy), and XRD (X-ray diffraction). β-CD/PVA/PAA hydrogel was analyzed, which influenced external environmental factors on the β-CD/PVA/PAA hydrogel adsorption performance, and the kinetic behavior of β-CD/PVA/PAA hydrogel on ciprofloxacin (CIP) adsorption was explored. The results concluded that the prepared β-CD/PVA/PAA hydrogel has a well-defined three-dimensional network structure. The decrease in the pH of the CIP solution and the adsorption temperature reduces the adsorption reaction of β-CD/PVA/PAA hydrogel on CIP. The kinetics of CIP adsorption by β-CD/PVA/PAA hydrogel confirmed the pseudo-second-order kinetic model (R
2 > 0.997), the maximum equilibrium adsorption amounts is 372.12 mg/g, the removal rate reaches 74.42%. The adsorption process was mainly chemisorption, the adsorption isotherm fits the Freundlich adsorption isotherm model (R
2 > 0.946), and the adsorption process was heterogeneous with multi-molecular layer adsorption. The adsorption process inclined more toward the adsorption of inhomogeneous multi-molecular layers. The β-CD/PVA/PAA hydrogel retained 80% adsorption properties after three adsorption-desorption under optimal conditions.
Subject
General Chemical Engineering
Reference92 articles.
1. Afzal, M. Z., X. F. Sun, J. Liu, C. Song, S. G. Wang, and A. Javed. 2018. “Enhancement of Ciprofloxacin Sorption on Chitosan/Biochar Hydrogel Beads.” Science of the Total Environment 639: 560–9, https://doi.org/10.1016/j.scitotenv.2018.05.129.
2. Ahmadi, A., R. Foroutan, H. Esmaeili, S. J. Peighambardoust, S. Hemmati, and B. Ramavandi. 2022. “Montmorillonite Clay/Starch/CoFe2O4 Nanocomposite as a Superior Functional Material for Uptake of Cationic Dye Molecules from Water and Wastewater.” Materials Chemistry and Physics 284: 126088, https://doi.org/10.1016/j.matchemphys.2022.126088.
3. Antonelli, R., G. R. P. Malpass, M. G. C. Silva, and M. G. A. Vieira. 2020. “Adsorption of Ciprofloxacin onto Thermally Modified Bentonite Clay: Experimental Design, Characterization, and Adsorbent Regeneration.” Journal of Environmental Chemical Engineering 8: 104553, https://doi.org/10.1016/j.jece.2020.104553.
4. Bai, B., D. Rao, T. Chang, and Z. Guo. 2019. “A Nonlinear Attachment-Detachment Model with Adsorption Hysteresis for Suspension-Colloidal Transport in Porous Media.” Journal of Hydrology 578: 124080, https://doi.org/10.1016/j.jhydrol.2019.124080.
5. Bi, L., L. Yang, Z. Y. Lei, Y. J. Jiang, L. Liu, G. J. Duan, R. Wu, P. Z. Hu, and T. H. Liu. 2019. “Contrastive Adsorptions of Uranium(Ⅵ)and Thorium(Ⅳ) by Modified β-cyclodextrin Hydrogels.” Journal of Nuclear and Radiochemistry 41 (4): 349–60.