title: Hg(II) adsorption using amidoximated porous acrylonitrile/itaconic copolymers prepared by suspended emulsion polymerization.
abstract: Initially, porous acrylonitrile/itaconic acid copolymers (AN/IA) were prepared by suspended emulsion polymerization. Successively, the cyano groups in AN/IA copolymers were converted to amidoxime (AO) groups by the reaction with hydroxylamine hydrochloride. The structures of the AN/IA and amidoximated AN/IA (AO AN/IA) were characterized by infrared spectroscopy, scanning electron microscopy, and porous structural analysis. The adsorption properties of AO AN/IA for Hg(II) were investigated. The results show that AO AN/IA has mesopores and macropores, and surface area of 11.71 m(2) g(-1). It was found that AO AN/IA has higher affinity for Hg(II), with the maximum adsorption capacity of 84.25 mg g(-1). The AO AN/IA also can effectively remove Hg(II) from different binary metal ion mixture systems. Furthermore, the adsorption kinetics and thermodynamics were studied in detail. The adsorption equilibrium can quickly be achieved in 4 h determined by an adsorption kinetics study. The adsorption process is found to belong to the second-order model, and can be described by the Freundlich model.
authors.affiliation: School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com.
authors.forename: Chunnuan
authors.initials: C
authors.lastname: Ji
authors.affiliation: School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com.
authors.forename: Rongjun
authors.initials: R
authors.lastname: Qu
authors.affiliation: School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com.
authors.forename: Hou
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com.
authors.forename: Xiguang
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com.
authors.forename: Changmei
authors.initials: C
authors.lastname: Sun
authors.affiliation: School of Chemistry & Materials Science, Ludong University, Yantai 264025, China E-mail: jichunnuan@126.com.
authors.forename: Caixia
authors.initials: C
authors.lastname: Ma
mesh_terms: D000181:Acrylonitrile / Q000737:chemistry*; D000327:Adsorption; D004655:Emulsions; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008628:Mercury / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics
chemical_list: D004655:Emulsions; D008670:Metals; D011108:Polymers; D008628:Mercury; D000181:Acrylonitrile