title: Investigation of the effect of magnetic particles on the Crystal Violet adsorption onto a novel nanocomposite based on κ-carrageenan-g-poly(methacrylic acid).
abstract: A novel nanocomposite hydrogel prepared by incorporating Fe3O4 magnetic nanoparticles into the κ-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 κ-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 ΔG°, ΔH° and ΔS° showed the endothermic nature of adsorption and a spontaneous process.
authors.affiliation: Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Gholami
authors.affiliation: Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran. Electronic address: mtvardini@iaut.ac.ir.
authors.forename: Mohammad Taghi
authors.initials: MT
authors.lastname: Vardini
authors.affiliation: Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran.
authors.forename: Gholam Reza
authors.initials: GR
authors.lastname: Mahdavinia
keywords: Crystal Violet; Kinetics of adsorption; Langmuir isotherm; Magnetic nanocomposite; κ-Carrageenan