title: An intelligent displacement pumping film system: a new concept for enhancing heavy metal ion removal efficiency from liquid waste.
abstract: A concept of electrochemically switched ion exchange (ESIX) hybrid film system with piston-like proton pumping effect for the removal of heavy metal ions was proposed. Based on this concept, a novel ESIX hybrid film composed of layered alpha zirconium phosphate (α-Zr(HPO4)2; α-ZrP) nanosheets intercalated with a potential-responsive conducting polyaniline (PANI) was developed for the removal of Ni(2+) ions from wastewater. It is expected that the space between α-ZrP nanosheets acts as the reservoir for the functional ions while the intercalated PANI works as the potential-sensitive function element for piston-like proton pumping in such ESIX hybrid films. The prepared ESIX hybrid film showed an excellent property of rapid removal of Ni(2+) ions from wastewater with a high selectivity. The used film was simply regenerated by only altering the applied potential. The ion pumping effect for the ESIX of Ni(2+) ions using this kind of film was proved via XPS analysis. The proposed ESIX hybrid film should have high potential for the removal of Ni(2+) ions and/or other heavy metal ions from wastewater in various industrial processes.
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: zdwangtyut@hotmail.com.
authors.forename: Zhongde
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Yanting
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: xghao@tyut.edu.cn.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Hao
authors.affiliation: Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 2-1-3, Matsubara, Aomori 030-0813, Japan. Electronic address: guan@cc.hirosaki-u.ac.jp.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Guan
authors.affiliation: North Japan Research Institute for Sustainable Energy (NJRISE), Hirosaki University, 2-1-3, Matsubara, Aomori 030-0813, Japan.
authors.forename: Abuliti
authors.initials: A
authors.lastname: Abudula
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D004563:Electrochemistry; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000295:instrumentation*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D014874:Water Pollutants, Chemical; C416807:polyaniline; C027006:zirconium phosphate; D009532:Nickel; D015040:Zirconium
keywords: Electrochemically switched ion exchange; Heavy metal ion; Piston-like proton pumping effects; Wastewater