An intelligent displacement pumping film system: A new concept for enhancing heavy metal ion removal efficiency from liquid waste

作者：Wang, Zhongde; Feng, Yanting; Hao, Xiaogang^*; Huang, Wei; Guan, Guoqing; Abudula, Abuliti

来源：Journal of Hazardous Materials, 2014, 274: 436-442.

DOI：10.1016/j.jhazmat.2014.04.035

• Piston-like proton pumping effects
• Electrochemically switched ion exchange
• Heavy metal ion
• Wastewater

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 (alpha-Zr(HPO4)(2); alpha-ZrP) nanosheets intercalated with a potential-responsive conducting polyaniline (PANI) was developed for the removal of Ni2+ ions from wastewater. It is expected that the space between alpha-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 Ni2+ 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 Ni2+ ions using this kind of film was proved via XPS analysis. The proposed ESIX hybrid film should have high potential for the removal of Ni2+ ions and/or other heavy metal ions from wastewater in various industrial processes.

• 出版日期2014-6-15
• 单位太原理工大学