Removal of trace Cd(II) from water with the manganese oxides/ACF composite electrode

Yaping Chen, Liang Peng*, Qingru Zeng, Yang Yang, Ming Lei, Huijuan Song, Liyuan Chai, Jidong Gu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The Manganese oxide/active carbon fiber (MO/ ACF) was prepared and its electrosorptive properties of Cd(II) in aqueous solution were investigated. The structure of MO/ACF was characterized with transmission electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. Furthermore, the Cd(II) electrosorptive properties of MO/ACF electrodes with different bias potentials, ionic strengths, and loaded amount of manganese oxides were measured and the electrosorption isotherm and kinetics were investigated. The Cd(II) electrosorptive capacity of MO/ACF was 6 times higher than that of pure ACF. The optimal adsorptive bias voltage was 1.5 V and the optimal electrolyte concentration of NaCl was 0.1 mol/L. The adsorption isotherm was agreed well with the Freundlich adsorption model and its maximum electrosorption capacity was 14.88 mg/g by Langmuir model. The higher adsorptive capacity of MO/ACF than that of pure ACF is attributed to higher capacitance and more adsorptive sites of MO/ACF.

Original languageEnglish
Pages (from-to)49-57
Number of pages9
JournalClean Technologies and Environmental Policy
Volume17
Issue number1
DOIs
StatePublished - Jan 2015
Externally publishedYes

Keywords

  • Capacitive deionization
  • Cd(II)
  • Electrosorption
  • Manganese oxides

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