Alternating pulse current in electrocoagulation for wastewater treatment to prevent the passivation of al electrode
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 wordsalternating pulse current electrocoagulation passivation of Al
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- Bensalah Nasr, Gadri Abdellatif, Pablo Canizares, et al. Electrochemical Oxidation of Hydroquinone, Resorcinol, and Catechol on Boron-doped Diamond Anodes[J]. Environ. Sci. Technol., 2005, 39:7 234–7 239Google Scholar
- Zucheng Wu, Minghua Zhou. Partial Degradation of Phenol by Advanced Electrochemical Oxidation Process[J]. Environ. Sci. Technol.,2001, 35: 2 698–2 703Google Scholar
- Chen Xueming. Analysis of Electrocoagulation Energy Consumption and Measures of Energy Saving[J]. Industrial Water Treatment, 1997, 23(3):165–168 (In Chinese)Google Scholar
- Sun Wangdian. XPS Studies of the ZnS1-xTex Ternary Alloy Films[J]. Vacuum Science and Technology, 1999, 19(2):75–80 (In Chinese)Google Scholar
- Liu Fen, Qiu Limei, Zhao Liangzhong. Research for Quantitative Imaging X-ray Photoelectron Spectrometric Analysis[J]. Chinese Journal of Analytical Chemistry, 2003, 31(9):l 082–l 084 (In Chinese)Google Scholar