Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution
El Nemr, A., Ismail, M., H. El Ashry, E., Abdel Hamid, H. (2020). Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution. EKB Journal Management System, 63(4), 1219-1240. doi: 10.21608/ejchem.2019.11157.1716
Ahmed El Nemr; Mohamed M.N. Ismail; El Sayed H. El Ashry; Hamida Abdel Hamid. "Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution". EKB Journal Management System, 63, 4, 2020, 1219-1240. doi: 10.21608/ejchem.2019.11157.1716
El Nemr, A., Ismail, M., H. El Ashry, E., Abdel Hamid, H. (2020). 'Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution', EKB Journal Management System, 63(4), pp. 1219-1240. doi: 10.21608/ejchem.2019.11157.1716
El Nemr, A., Ismail, M., H. El Ashry, E., Abdel Hamid, H. Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution. EKB Journal Management System, 2020; 63(4): 1219-1240. doi: 10.21608/ejchem.2019.11157.1716

Novel Simple Modification of Chitosan as Adsorptive Agent for Removal of Cr6+ from Aqueous Solution

Egyptian Journal of Chemistry
Article 7, Volume 63, Issue 4, April 2020, Page 1219-1240  XML PDF (3.02 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2019.11157.1716
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Authors
Ahmed El Nemr email orcid 1; Mohamed M.N. Ismail2; El Sayed H. El Ashryorcid 3; Hamida Abdel Hamid4
1Environmental Division, National Institute of Oceanography and Fisheries, Kayet Bey, El-Anfoushy, Alexandria, Egypt
2Marine Pollution Department, Environment Division, National Institute of Oceanography and Fisheries, Kaye1t Bey, El-Anfoushy, Alexandria, Egypt
3Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
4Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
Abstract
Chitosan grafted crotonaldehyde (CGC) by nucleophilic addition reaction of the amine group with α,β-unsaturated aldehyde was achieved by simple method using Lewis acid FeCl3.6H2O or ZrOCl2.8H2O as a catalyst. The product has been extensively characterized using FTIR, TGA, SEM, and EDX. The CGC was used for removal of hexavalent chromium from its aqueous solution. Batch experiment was tested using different contact times and initial Cr6+ ion concentrations under acidic condition (pH 1.5). Isotherm studies were achieved using variable models (Langmuir, Freundlich, and Tempkin) which showed a 10-fold greater uptake (434.78 mg/g) for modified chitosan over non-modified chitosan. The kinetics of Cr6+ adsorption by CGC followed the pseudo-second order model. This study proved that the CGC is a promising material for the treatment of wastewater containing Cr6+ ions.
Keywords
Chitosan; crotonaldehyde; Cr6+ removal; ferric chloride; zirconyl chloride
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