title: A comprehensive investigation on adsorption of Ca (II), Cr (III) and Mg (II) ions by 3D porous nickel films.
abstract: The present study reports the removal of Ca (II), Cr (III), Mg (II) ions from aqueous solution using 3D-porous nickel films (3DNFs) as a novel adsorbent material prepared by hydrogen bubble dynamic template (HBDT) method at room temperature. The structure morphology and the phase constitution of 3DNFs were characterized by FESEM, EDS and XRD. Adsorption process of Ca (II), Cr (III), Mg (II) ions was fast as the equilibrium was established within 30min, and the maximum adsorption at equilibrium was 44.1mg/g, 46.4mg/g and 32.7mg/g, respectively. The adsorption kinetics well fitted using a pseudo second-order kinetic model. The adsorption isotherm data of all the three metals fit well the Langmuir and Freundlich adsorption isotherm model. It was found out that kinetics of adsorption varies with initial concentration of metal ions. Thermodynamic parameters (i.e., the standard Gibbs free energies (ΔG), enthalpy change (ΔH), standard entropy change (ΔS)) were also evaluated. Thermodynamic analysis indicated that a high temperature is favored for the adsorption of metal ions by 3DNFs. These results suggest that 3DNFs have good potential application in effective adsorption of metal ions with satisfactory results.
authors.affiliation: School of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou 635000, PR China. Electronic address: laichuanemail@163.com.
authors.forename: Chuan
authors.initials: C
authors.lastname: Lai
authors.affiliation: College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China. Electronic address: 1049313825@qq.com.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Guo
authors.affiliation: School of Foreign Languages and Literature, Chongqing Normal University, Chongqing 401331, PR China.
authors.forename: Zhongshu
authors.initials: Z
authors.lastname: Xiong
authors.affiliation: School of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou 635000, PR China.
authors.forename: Changlu
authors.initials: C
authors.lastname: Liu
authors.affiliation: School of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou 635000, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhu
authors.affiliation: School of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Dazhou 635000, PR China.
authors.forename: Mei
authors.initials: M
authors.lastname: Wu
authors.affiliation: College of Science, Tsinghua University, Beijing 100084, PR China.
authors.forename: Daixiong
authors.initials: D
authors.lastname: Zhang
keywords: 3D-porous nickel films; Adsorption; Isotherm; Kinetic; Metal ions; Thermodynamic