Citric acid modified Camellia oleifera shell for removal of crystal violet and Pb(II): parameters study and kinetic and thermodynamic profile. Issue 33 (14th July 2016)

• Record Type: Journal Article
• Authors: Guo, Huiqin; Yan, Liushui; Song, Dongyang; Li, Kexin
• Is Part Of: Desalination and water treatment. Volume 57:Issue 33(2016)
• Page Start: 15373
• Page End: 15383
• Publication Date: 2016-07-14
• Subjects: Citric acid modified Camellia oleifera shell (CA-COS) -- Adsorption -- Crystal violet -- Lead ions -- Wastewater treatment; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2015.1072057
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: Chemically modified Camellia oleifera shell (CA-COS) was prepared by means of solid-phase esterifying technique. The adsorption of crystal violet (CV) and Pb(II) onto CA-COS were studied and the effect of various parameters such as solution pH, ion strength, and the initial concentration of contaminant on the adsorption were investigated. The adsorption kinetics, adsorption isotherms, and thermodynamic behaviors were also studied. The pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were employed to describe the kinetic behaviors of the adsorption in different initial contamination concentrations, and it was found that the adsorption processes followed the pseudo-second-order model very well. The adsorption equilibrium data fitted to the Langmuir isotherm ( R 2 = 0.9996 and 0.9992 for CV and Pb(II), respectively) well, and the adsorption capacity of CA-COS to CV and Pb(II) were 120.5 and 45.2 mg g −1, respectively. The thermodynamic results indicated the adsorption of CV and Pb(II) on CA-COS is endothermic and can proceed spontaneously.