Synthesis of CarAlg/MMt nanocomposite hydrogels and adsorption of cationic crystal violet |
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| Authors: | Gholam Reza Mahdavinia Huriyeh Aghaie Hossein Sheykhloie Mohammad Taghi Vardini Hossein Etemadi |
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| Institution: | 1. Department of Chemistry, Faculty of Science, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran;2. Department of Applied Chemistry, Faculty of Science, Tabriz Branch, Islamic Azad University, P.O. Box 1655, Tabriz, Iran;3. Department of Chemistry, Faculty of Science, Maragheh Branch, Islamic Azad University, P.O. Box 345, Maragheh, Iran |
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| Abstract: | CarAlg/MMt nanocomposite hydrogels composed of kappa-carrageenan (Car) and sodium alginate (Alg) biopolymers were synthesized by incorporation of sodium montmorillonite (Na-MMt) nanoclay. Acrylamide (AAm), methylenebisacrylamide (MBA), and ammonium persulfate (APS) were used as monomer, crosslinker, and initiator, respectively. The structure and morphology of nanocomposites were characterized by XRD, SEM, and TEM techniques. The XRD results showed exfoliated MMt nanoclay and exfoliation of MMt was confirmed by TEM graph. The resulting nanocomposites were evaluated to remove cationic crystal violet (CV) dye from water. According to data, the adsorption capacity of nanocomposites was enhanced as the clay content was increased. The experimental data were analyzed according to both Langmuir and Freundlich models and experimental maximum adsorption capacity was obtained 88.8 mg g−1. By studying the effect of pH on the dye adsorption capacity of nanocomposites, it was revealed that the adsorption capacity of nanocomposites was enhanced at acidic pHs as the Na-MMt nanoclay and kappa-carrageenan components were increased. |
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| Keywords: | kappa-Carrageenan Sodium alginate Nanocomposite Hydrogel Adsorption |
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