Article
2022
·
8 citations
Effects of Prepared Gadolinium Oxide-Doped Chitosan/PVA Hydrogels on Congo Red Removal in Water
Abstract
Chitosan/polyvinyl alcohol/Gd2O3 (Ch-PVA-Gd) hydrogels were produced by freeze-thaw method for the adsorption of Congo red (CR) dye. The adsorbent was characterized using FT-IR, XRD, SEM-EDX, BET, and Zetasizer instruments. On the adsorption, the effects of the Gd2O3 doping ratio, pH, starting concentration, and adsorbent quantity were studied. The adsorption experiments removed more than 99% of Congo red. The Langmuir and Freundlich isotherm models were compared, and the Langmuir isotherm was found to be the most compatible. The maximum adsorption was calculated to be 312.5 mg/g using the Langmuir isotherm. The pseudo-second-order kinetic model was found to be the best fit for adsorption kinetics.
Keywords
Congo red
Chitosan
Adsorption
Gadolinium oxide
Hydrogel
AQUEOUS-SOLUTION
ADSORPTIVE REMOVAL
POLYVINYL-ALCOHOL
DYE
EQUILIBRIUM
NANOPARTICLES
DEGRADATION
SCAFFOLDS
MECHANISM
KINETICS
WoS Categories
Environmental Sciences
Meteorology & Atmospheric Sciences
Water Resources
Sustainable Development Goals
Citation
- Journal
- WATER AIR AND SOIL POLLUTION
- Year
- 2022
- Volume
- 233
- Issue
- 10
- ISSN
- 0049-6979
- eISSN
- 1573-2932
- DOI
- 10.1007/s11270-022-05884-3
- WoS UID
- WOS:000865046100002