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Study on the treatment of photovoltaic wastewater using electrocoagulation: Fluoride removal with aluminium electrodes—Characteristics of products

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N. DROUICHE, S. AOUDJ, M. HECINI, N. GHAFFOUR, H. LOUNICI, N. MAMERI

Study on the treatment of photovoltaic wastewater using electrocoagulation:

Fluoride removal with aluminium electrodes—Characteristics of products

Journal of Hazardous Materials, Volume 169, Issues 1-3, 30 September 2009, Pages

65-69

http://dx.doi.org/10.1016/j.jhazmat.2009.03.073

ABSTRACT:

In this work, treatment of synthetic fluoride-containing solutions by electrocoagulation method using aluminium electrodes has been studied. Electrocoagulation was investigated for applied potential (10-30 V), electrolysis time and supporting electrolyte (NaCl)

concentration (0-100 mg/L). The results showed that with increasing applied potential and electrolysis time, the Al3+ dosage increases, and thereby favouring the fluoride ions removal. It was also observed that defluoridation is dependant on the concentration of supporting electrolyte. Finally, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy of X-rays and Fourier transform infrared spectroscopy were used to characterize the solid products formed by aluminium electrodes during the EC process.

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