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

doi:10.1007/s11595-006-2239-7

Journal of Wuhan University of Technology Materials Science Edition ›› 2008, Vol. 23 ›› Issue (2) : 239-241. DOI: 10.1007/s11595-006-2239-7

Article

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

Xuhui Mao¹ ,
Song Hong¹^,^{^{^b}} ,
Hua Zhu¹ ,
Hui Lin¹ ,
Lin Wei¹ ,
Fuxing Gan¹^,²

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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.

Keywords

alternating pulse current / electrocoagulation / passivation of Al

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Xuhui Mao, Song Hong, Hua Zhu, Hui Lin, Lin Wei, Fuxing Gan. Alternating pulse current in electrocoagulation for wastewater treatment to prevent the passivation of al electrode. Journal of Wuhan University of Technology Materials Science Edition, 2008, 23(2): 239‒241 https://doi.org/10.1007/s11595-006-2239-7

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