Removal of Fe(III) from ethanol solution by silica-gel supported dendrimer-like polyamidoamine polymers. (1st May 2018)

• Record Type: Journal Article
• Authors: Qu, Rongjun; Sun, Changmei; Ma, Fang; Zhang, Ying; Ji, Chunnuan; Yin, Ping
• Is Part Of: Fuel. Volume 219(2018)
• Page Start: 205
• Page End: 213
• Publication Date: 2018-05-01
• Subjects: Silica-gel functionalized with polyamidoamine -- Iron ion -- Ethanol solution -- Kinetics -- Equilibrium; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.01.131
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Silica-gel supported dendrimer-like polyamidoamine polymers was a potential remover for Fe(III). Different adsorption mechanics in ethanol solution and in aqueous solution. Solvents played an important role in the removal for Fe(III). Abstract: The adsorption properties of silica-gel supported hyperbranched polyamidoamine dendrimers (SiO2 -G1.0, SiO2 -G2.0 and SiO2 -G3.0) for the removal of Fe(III) from ethanol solution have been investigated. The effect of adsorbent mass, contact time, initial Fe(III) ion concentration, and temperature have been demonstrated. The adsorption kinetics of the three adsorbents was well described by the pseudo-second-order model. Langmuir isotherm model was more suitable to describe the equilibrium data, and suggested the monolayer adsorption. The mean free energy calculated from D-R isotherm model demonstrated the adsorption processes of was preceded by physical adsorption or chemical adsorption for different generation product in different temperatures. Thermodynamic parameters demonstrated that the adsorption process was exothermic, spontaneous, and random increasing process with the increase of temperature. The adsorption mechanics for Fe(III) is was greatly affected by the solvent. Furthermore, the desorption rate of the SiO2 -G1.0 maintained more than 90%, and reflected excellent reusability.