期刊
CARBOHYDRATE POLYMERS
卷 136, 期 -, 页码 772-781出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.09.044
关键词
Crystal Violet; kappa-Carrageenan; Magnetic nanocomposite; Kinetics of adsorption; Langmuir isotherm
资金
- Islamic Azad University, Tabriz Branch, Department of chemistry, Analytical Chemistry laboratory
A novel nanocomposite hydrogel prepared by incorporating Fe3O4 magnetic nanoparticles into the kappa-carrageenan-g-poly (methacrylic acid) with in situ polymerization and was characterized by FT-IR, XRD, SEM, TEM and VSM. Synthesized nanocomposite was used to adsorb Crystal Violet (CV) (cationic dye) in aqueous solution in a batch system. The research studies showed that the adsorption of CV can be impressed as a function of contact time, initial concentration of CV, pH and molar ratio of x-carrageenan to poly(methacrylic acid). CV adsorption tests disclosed that it only takes 15 min to reach the equilibrium and adsorption capacity for this dye was 28.24 mg g(-1). Langmuir isotherm for equilibrium adsorption data was fitted well and the pseudo-second-order model can describe the adsorption kinetics. Thermodynamic parameters of Delta G degrees, Delta H degrees and Delta S degrees showed the endothermic nature of adsorption and a spontaneous process. (C) 2015 Elsevier Ltd. All rights reserved.
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