title: Adsorptional removal of methylene blue by guar gum-cerium (IV) tungstate hybrid cationic exchanger.
abstract: Guar gum-cerium (IV) tungstate nanocomposite (GG/CTNC) cationic exchanger was synthesized using simple sol gel method. The GG/CTNC was characterized using X-ray diffraction (XRD), Fourier transmission infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive X-ray spectrophotometer (EDX). The XRD studies confirmed amorphous and fibrous in nature of GG/CTNC. The high percentage of oxygen in the nanocomposite material confirmed the functionality tungstate (WO4(-)). The ion exchange capacity of GG/CTNC for Na(+) ion was observed to be 1.30 mequivg(-1). The hybrid exchanger was used as potential adsorbent for the removal of methylene blue (MB) from aqueous system. The correlation coefficients value indicated a good fit of monolayer Langmuir model to the adsorption of methylene blue onto GG/CTNC. The adsorption kinetic study revealed that the adsorption process followed the pseudo second order kinetic. The Gibbs free energy (ΔG) values confirmed the spontaneous nature of adsorption process.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India. Electronic address: vinodfcy@gmail.com.
authors.forename: V K
authors.initials: VK
authors.lastname: Gupta
authors.forename: Deepak
authors.initials: D
authors.lastname: Pathania
authors.forename: Pardeep
authors.initials: P
authors.lastname: Singh
authors.forename: Amit
authors.initials: A
authors.lastname: Kumar
authors.forename: B S
authors.initials: BS
authors.lastname: Rathore
mesh_terms: D000327:Adsorption; D002563:Cerium / Q000737:chemistry*; D005685:Galactans / Q000737:chemistry*; D007474:Ion Exchange; D007700:Kinetics; D008351:Mannans / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry* / Q000302:isolation & purification*; D053149:Plant Gums / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D017973:Tungsten Compounds / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D005685:Galactans; D008351:Mannans; D053149:Plant Gums; D017973:Tungsten Compounds; D014874:Water Pollutants, Chemical; D002563:Cerium; C007894:guar gum; C045951:tungstate; D008751:Methylene Blue
keywords: Adsorption; Characterization; Hybrid ion exchanger; Kinetics; Methylene blue