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author:

Hong, Xiaoting (Hong, Xiaoting.) [1] | Zhu, Enhao (Zhu, Enhao.) [2] | Ye, Zhuoliang (Ye, Zhuoliang.) [3] | Hui, K. S. (Hui, K. S..) [4] | Hui, K. N. (Hui, K. N..) [5]

Indexed by:

EI Scopus SCIE

Abstract:

Phosphorus removal is essential to avoid eutrophication in water bodies. Layered double hydroxides (LDHs) are widely used to scavenge phosphate through intercalated ion exchange or surface complexation. Moreover, LDHs have attracted increasing attention as electrode modifiers for supercapacitors. Researchers have begun to redelve the electrosorption technology according to the fundamental principle of electrical double layers. Herein, we propose a new phosphate removal method inspired by the adsorption characteristic and electrical double-layer capacitive properties of LDHs through electrosorption via capacitive deionization. We present a series of experiments to study the enhanced phosphate removal under an electric field via multiple mechanisms on the MgAl-LDHs/AC electrode. The uptake of phosphate by MgAl-LDHs/AC was investigated as a function of phosphate concentration, applied voltage, electrode materials, and temperature. The MgAl-LDHs/AC electrode possessed a salt removal capacity of 67.92 mg PO43-.g(-1) (1.2 V, 250 mg.L-1 KH2PO4, 30 degrees C). The electrosorption kinetics of phosphate ions onto the capacitive deionization electrode followed the pseudo-second-order kinetics model rather than the pseudo-first-order kinetics model. Furthermore, the adsorption isotherms of phosphate on the MgAl-LDHs/AC electrode fitted the Freundllch model better than the Langmuir model. The proposed method could be used for phosphate removal.

Keyword:

Electrosorption MgAl-LDHs/AC electrode Multiple mechanisms Phosphate removal

Community:

  • [ 1 ] [Hong, Xiaoting]Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China
  • [ 2 ] [Zhu, Enhao]Fuzhou Univ, Sch Chem Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Ye, Zhuoliang]Fuzhou Univ, Sch Chem Engn, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Hui, K. S.]Univ East Anglia, Fac Sci, Sch Math, Norwich NR4 7TJ, Norfolk, England
  • [ 5 ] [Hui, K. N.]Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macau, Peoples R China

Reprint 's Address:

  • 叶卓亮

    [Hong, Xiaoting]Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China;;[Ye, Zhuoliang]Fuzhou Univ, Sch Chem Engn, Fuzhou 350116, Fujian, Peoples R China

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Source :

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ISSN: 1572-6657

Year: 2019

Volume: 836

Page: 16-23

3 . 8 0 7

JCR@2019

4 . 1 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

ESI HC Threshold:184

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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