Recovery of cesium using NiHCF/NiAl-LDHs/CCFs composite by two-stage membrane-free ESIX process. Issue 1 (February 2019)

• Record Type: Journal Article
• Authors: Chen, Tao; Jin, Guan-Ping; Meng, Gai-Jun; Lv, Xiao-Yuan; Yu, Ye-Xiao; Chen, Chun-Nian
• Is Part Of: Journal of environmental chemical engineering. Volume 7:Issue 1(2019)
• Publication Date: 2019-02
• Subjects: Membrane-free electrically switched ion exchange -- Cesium recovery -- Potassium nickel hexacyanoferrate -- Carbon fibers composite; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2018.10.070
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Graphic Preparation of NiHCF/NiAl-LDHs/CCFs for the recovery of Cs + using MF-II-ESIX process. Highlights: Ni/Al-LDHs was electrodeposited at aspartic acid/poly glycidyl methacrylate/carbon fibers composite support with conductive 3D structure. Nickel hexacyanoferrate was electrodeposited at the composite to recover Cs + from aqueous solution. A two-stage membrane-free electrically switched ion exchange sorption and desorption process was suggested for the recovery of Cs + . Abstract: In this work, aspartic acid-functionalized poly glycidyl methacrylate grafted carbon fibers (CCFs) were prepared by electrochemically mediated atom transfer radical polymerization to form three dimensional (3D) chelating precursor; Ni/Al layered double hydroxides and nickel hexacyanoferrate were respectively deposited in suit to form 3D functional composite for the recovery of cesium (NiHCF/NiAl-LDHs/CCFs). The characterization was confirmed by FE-SEM, XRD, IR, XPS and electrochemistry techniques. Meanwhile, a two-stage membrane-free electrically switched ion exchange sorption and desorption process- (MF-II-ESIX) was suggested for the recovery of Cs + using NiHCF/NiAl-LDHs/CCFs from aqueous solution. The maximal adsorption capacity of 167.5 mg g −1 could be obtained at -0.4 V for 4 h in pH 6.0. The Cs + adsorbed at NiHCF/NiAl-LDHs/CCFs could be effectively desorbed by cycle voltammeter in a potential range of −0.1 to 1.2 V with 120 cycles in pH 7.0, 0.1 M NH4 Cl.