Microwave promoted graft copolymerization of poly(ethylacrylate) onto k-carrageenan for removal of Cd and Ni from aqueous solution

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dc.contributor.authorMoses, Mwumvaneza
dc.contributor.authorMutegoa, Eric
dc.contributor.authorSingh, Somit K.
dc.date.accessioned2024-08-19T06:52:20Z
dc.date.available2024-08-19T06:52:20Z
dc.date.issued2024-04
dc.descriptionAbstract. Full text is available at https://doi.org/10.1016/j.ijbiomac.2024.130755
dc.description.abstractMicrowave promoted graft copolymerization of poly (ethyl acrylate) onto kappa-carrageenan in presence of a redox pair (ascorbic acid and potassium persulfate) led to the formation of a novel copolymer hydrogel, kappa-carrageenan-graft-poly (ethylacrylate). By varying the reaction conditions such as the microwave power, reaction time, concentration of kappa-carrageenan, ascorbic acid and persulfate, copolymers of highest percentage grafting was obtained and characterized by FT-IR, SEM, TGA and XRD. The copolymer was evaluated as an adsorbent for the adsorption of Ni (II) and Cd (II). Various adsorption parameters such as contact time, pH, initial metal ion concentration, temperature, electrolyte strength and adsorbent dosage were varied to obtain the optimum conditions for the adsorption. The adsorption data for Cd (II), fitted better for Langmuir and Ni (II), fitted much better for Freundlich adsorption isotherm model. Maximum adsorption obtained for cadmium ions and nickel ions was 308.6 mg/g-1 and 305.8 mg/g-1 respectively. The adsorption of both metal ions followed pseudo second order kinetic model. The positive ΔH values endorsed the adsorption process to be endothermic in nature. The negative values of ΔG indicate the spontaneity of the adsorption process while the positive ΔS values showed that the adsorption of metal ions proceeded with increased randomness at the surface of the copolymer. High recovery percentage of the metal ions from the adsorbent indicates that the copolymer can be used for more adsorption cycles.
dc.identifier.citationMoses, M., Mutegoa, E., & Singh, S. K. (2024). Microwave promoted graft copolymerization of poly (ethylacrylate) onto k-carrageenan for removal of Cd and Ni from aqueous solution. International Journal of Biological Macromolecules, 265, 130755.
dc.identifier.doi10.1016/j.ijbiomac.2024.130755
dc.identifier.otherDOI: https://doi.org/10.1016/j.ijbiomac.2024.130755
dc.identifier.urihttps://repository.udom.ac.tz/handle/20.500.12661/4751
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofInternational Journal of Biological Macromolecules
dc.subjectMicrowave
dc.subjectCopolymerization
dc.subjectCopolymer
dc.subjectEthyl acrylate
dc.subjectAscorbic acid
dc.subjectk-carrageenan
dc.subjectAqueous solution
dc.subjectAqueous
dc.titleMicrowave promoted graft copolymerization of poly(ethylacrylate) onto k-carrageenan for removal of Cd and Ni from aqueous solution
dc.typeArticle
oaire.citation.volume265
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