Electro Coagulation Removal of As from Water: the Role of Phases Formation

The adsorbents (such as hydrous ferric oxides, HFO) generated in the electrocoagulation (EC) processing with iron electrodes are able to remove effectively inorganic arsenic (As) present in underground water. A characterization of the HFO phases produced during the arsenic removal by the EC process...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2015-07, Vol.226 (8), p.1-6, Article 249
Main Authors: Maldonado-Reyes, A., Montero-Ocampo, C., Medina-Garcia, J., Bolado-Rodríguez, S., Alvárez-Benedí, J., Herrera-Vazquez, A., Castaño, V. M.
Format: Article
Language:English
Subjects:
Arsenic
Arsenic removal
Atmospheric Protection/Air Quality Control/Air Pollution
Climate Change/Climate Change Impacts
Diffraction
Earth and Environmental Science
Electrodes
Environment
Environmental monitoring
Fourier transforms
Hydrogeology
Iron compounds
Iron oxides
Pollutant removal
Scanning electron microscopy
Soil Science & Conservation
Spectrum analysis
Water Quality/Water Pollution
X-ray diffraction
X-ray spectroscopy
X-rays
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Summary:The adsorbents (such as hydrous ferric oxides, HFO) generated in the electrocoagulation (EC) processing with iron electrodes are able to remove effectively inorganic arsenic (As) present in underground water. A characterization of the HFO phases produced during the arsenic removal by the EC process from low and high arsenic concentration, by using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, energy dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM), is presented. The main HFO phase produced by this process is lepidocrocite (γ-FeOOH), and that the sorption of arsenic by this solid-state phase formed as part of the EC process was effective in removing arsenic from aqueous solution.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-015-2398-2