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Alternating pulse current in electrocoagulation for wastewater treatment to prevent the passivation of al electrode

  • Xuhui Mao
  • Song Hong
  • Hua Zhu
  • Hui Lin
  • Lin Wei
  • Fuxing Gan
Article

Abstract

A novel current feed style, alternating pulse current, was proposed in electrocoagulation aiming at preventing the passivation of electrode materials. The open circuit potential (OCP) measurements after anodic and cathodic potentiodynamic polarization showed that cathodic polarization could activate Al electrode. The surface of Al electrode after alternating pulse current electrocoagulation was investigated by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS), and the results indicate that passivation of Al is not observed. Furthermore, the simulated wastewater treatment tests show that alternating pulse current electrocoagulation has a visible energy saving effect and is worthy of generalization.

Key words

alternating pulse current electrocoagulation passivation of Al 

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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Xuhui Mao
    • 1
  • Song Hong
    • 1
  • Hua Zhu
    • 1
  • Hui Lin
    • 1
  • Lin Wei
    • 1
  • Fuxing Gan
    • 1
    • 2
  1. 1.School of Resource & Environmental ScienceWuhan UniversityWuhanChina
  2. 2.State Key Laboratory of Metal Corrosion and ProtectionChinese Academy of ScienceShenyangChina

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