Utilizing Green Chemistry in The Synthesis of Modified Chitosan Biosorbents: Application in La(III) Ion Recovery from The Monazite Leach Liquor

Semida, Waleed M.; Hassan, Ali M.; Mohammaden, Tarek F.; Negm, Sameh H.; Abd El-Magied, Mahmoud O.

doi:10.21608/ejchem.2023.203780.7815

	Utilizing Green Chemistry in The Synthesis of Modified Chitosan Biosorbents: Application in La(III) Ion Recovery from The Monazite Leach Liquor
Egyptian Journal of Chemistry
Volume 66, Issue 13, December 2023, Page 1231-1246 PDF (1.86 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2023.203780.7815
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Authors
Waleed M. Semida¹; Ali M. Hassan²; Tarek F. Mohammaden¹; Sameh H. Negm¹; Mahmoud O. Abd El-Magied ¹
¹Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, Egypt
²Chemistry Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
Abstract
The current study's goal is to use a green synthesis approach in developing some biosorbents for lanthanum (La(III)) recovery from its aquatic media. Chitin (SW-Chitin) was extracted from industrial waste (shrimp waste, SW) by demineralization followed by deproteination reactions. The obtained chitin (SW-Chitin) product was converted to chitosan (SWC) by a deacetylation reaction. The purified chitosan product (PSWC) was modified with epichlorohydrin (ep) in two reaction steps to produce a chitosan-epichlorohydrin polymer (PSWCl/ep-Cl). The former product (chitosan-epichlorohydrin polymer, PSWC/ep-Cl) was modified with N,N'-bis(2-aminoethyl)ethane-1,2-diamine, and chloroacetic acid to produce a poly nitrogen biosorbent (PSWC/ep/T-amine) and poly oxygen/nitrogen biosorbent (SWCh/ep/T-amine/PCOOH), respectively. The complexing functionalities of the chitosan backbone have been improved by these moieties (multidentate nitrogen and oxygen donor moieties) to improve the loading capacity, selectivity, and kinetics. The SEM/EDX analysis show that PSWC/EP/T-amine, and PSWC/EP/T-amine/P-COOH mainly composed of nitrogen, and oxygen, hydrogen and carbon. The TGA analysis of PSWC/EP/T-amine, and PSWC/EP/T-amine/P-COOH revealed many periods of mass losses. Also, the dTG (%/min) of PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH biosorbents contain multiple endothermic peaks. All endothermic peaks in the dTG curves are related to thermal decomposition of PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH adsorbents. The affinity of SWCh/ep/T-amine and SWCh/ep/T-amine/PCOOH for lanthanum (III) ions was investigated using batch technique. The maximum uptake of lanthanum ions by SWCh/ep/T-amine and SWCh/ep/T-amine/PCOOH was achieved at pH 7 and 328K were 98.2 and 129.6 mg/g, respectively. The results refers to a chemisorption reaction of lanthanum ions with the PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH adsorbents controlled intraparticle diffusion mechanism. The isotherm and thermodynamic evaluation refers to spontaneous, endothermic, monolayer adsorption of lanthanum ions on the PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH adsorbents.
Keywords
La(III); Green Synthesis; Biosorbent; Adsorption; Monazite


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