Volume 18, Issue 2, October 2016, Pages 473–482
Ghita SBAI1 and Mohammed LOUKILI2
1 Laboratoire des procédés, énergies renouvelables et environnement, Université Sidi Mohamed Ben Abdellah - Ecole Supérieure de Technologie, Route d’Imouzzer B.P. 2427 Fès, Morocco
2 Laboratoire des procédés, énergies renouvelables et environnement, Université Sidi Mohamed Ben Abdellah - Ecole Supérieure de Technologie, Route d’Imouzzer B.P. 2427 Fès, Morocco
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In most developing countries, the tanneries discharge their waste into the sewer systems, which in turn poured into the waters of continental surface, or used for irrigation of the land. The high concentrations of chromium and hydrogen sulphide present in residual waters of the tanneries have a bearing on the quality of the water and may give him unpleasant tastes and odors. The suspended solids such as lime, hairs, the pieces of fat and flesh, etc., disturb surface water and settle to the bottom, which harmfully affect fish. In our study, we used an original method of electrochemical treatment of tannery effluents in order to quantitatively oxidize the trivalent chromium to hexavalent chromium and simultaneously destroy oxidizable organic compounds. After the electrochemical treatment is complete. The hexavalent chromium is recovered by selective extraction and the organic phase obtained brought into contact with formic acid to reduce the hexavalent chromium to trivalent chromium. The solution obtained can be used as such in chromium plating bath or converted to trivalent chromium derivatives used in the tanning industry.
Author Keywords: electrochemical treatment, tannery effluents, trivalent chromium, hexavalent chromium.
Ghita SBAI1 and Mohammed LOUKILI2
1 Laboratoire des procédés, énergies renouvelables et environnement, Université Sidi Mohamed Ben Abdellah - Ecole Supérieure de Technologie, Route d’Imouzzer B.P. 2427 Fès, Morocco
2 Laboratoire des procédés, énergies renouvelables et environnement, Université Sidi Mohamed Ben Abdellah - Ecole Supérieure de Technologie, Route d’Imouzzer B.P. 2427 Fès, Morocco
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
In most developing countries, the tanneries discharge their waste into the sewer systems, which in turn poured into the waters of continental surface, or used for irrigation of the land. The high concentrations of chromium and hydrogen sulphide present in residual waters of the tanneries have a bearing on the quality of the water and may give him unpleasant tastes and odors. The suspended solids such as lime, hairs, the pieces of fat and flesh, etc., disturb surface water and settle to the bottom, which harmfully affect fish. In our study, we used an original method of electrochemical treatment of tannery effluents in order to quantitatively oxidize the trivalent chromium to hexavalent chromium and simultaneously destroy oxidizable organic compounds. After the electrochemical treatment is complete. The hexavalent chromium is recovered by selective extraction and the organic phase obtained brought into contact with formic acid to reduce the hexavalent chromium to trivalent chromium. The solution obtained can be used as such in chromium plating bath or converted to trivalent chromium derivatives used in the tanning industry.
Author Keywords: electrochemical treatment, tannery effluents, trivalent chromium, hexavalent chromium.
How to Cite this Article
Ghita SBAI and Mohammed LOUKILI, “Electrochemical treatment of tannery effluents and chrome recovery,” International Journal of Innovation and Applied Studies, vol. 18, no. 2, pp. 473–482, October 2016.
