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Chromium removal from drinking water by redox-assisted coagulation: Chemical versus electrocoagulation.

Martín-Domínguez, Alejandra; Rivera-Huerta, María de Lourdes; Pérez-Castrejón, Sara; Garrido-Hoyos, Sofía E.; Villegas-Mendoza, Iván Emmanuel; Gelover-Santiago, Silvia Lucila; Drogui, Patrick; Buelna, Gerardo (2018). Chromium removal from drinking water by redox-assisted coagulation: Chemical versus electrocoagulation. Separation and Purification Technology , vol. 200 . p. 266-272. DOI: 10.1016/j.seppur.2018.02.014.

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Résumé

Chemical Coagulation (CC) and Electrocoagulation (EC) processes using iron as coagulating agent were compared while treating aquifer water contaminated by a relatively high concentration of total chromium (CrT = 19.0 mg L⁻¹). A continuous semi-pilot comprising of EC (or CC), followed by flocculation, sedimentation and sand-filtration steps was used to remove CrT from water in order to get drinking water. A ratio of Fe/CrT ≥ 3 was required to reach the best efficiency of treatment using EC and CC. More than 99% of CrT was removed and residual CrT concentration below 0.05 mg L⁻¹ (the limiting value recommended by WHO) could be obtained using the both configurations. However, CC increased the concentration of dissolved solids above the guideline recommended for drinking water.

Type de document: Article
Mots-clés libres: chromium; chemical coagulation; electrocoagulation; drinking water; semi-pilot scale
Centre: Centre Eau Terre Environnement
Date de dépôt: 06 avr. 2018 15:58
Dernière modification: 06 avr. 2018 15:58
URI: http://espace.inrs.ca/id/eprint/6882

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