Commenced in January 2007
Paper Count: 31515
Characteristics of Suspended Solids Removal by Electrocoagulation
Abstract:The electrochemical coagulation of a kaolin suspension was investigated at the currents of 0.06, 0.12, 0.22, 0.44, 0.85 A (corresponding to 0.68, 1.36, 2.50, 5.00, 9.66 mA·cm-2, respectively) for the contact time of 5, 10, 20, 30, and 50 min. The TSS removal efficiency at currents of 0.06 A, 0.12 A and 0.22 A increased with the amount of iron generated by the sacrificial anode, while the removal efficiencies did not increase proportionally with the amount of iron generated at the currents of 0.44 and 0.85 A, where electroflotation was clearly observed. Zeta potential measurement illustrated the presence of the highly positive charged particles created by sorption of highly charged polymeric metal hydroxyl species onto the negative surface charged kaolin particles at both low and high applied currents. The disappearance of the individual peaks after certain contact times indicated the attraction between these positive and negative charged particles causing agglomeration. It was concluded that charge neutralization of the individual species was not the only mechanism operating in the electrocoagulation process at any current level, but electrostatic attraction was likely to co-operate or mainly operate.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077104Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2459
 N.S. Abuzaid, A.A. Bukhari, Z.M. Al-Hamouz, J. Environ. Sci. Health, Part A 33, 7 (1998) 1341-1358.
 A. Bukhari, Bioresour. Technol. 99, 5 (2008) 914-921.
 M.J. Mattenson, R.L. Dobson, R.W. Glenn, W.H. Kukunoor, E.J. Clayfield, Colloids and Surfaces A: Physicochem. Eng. Aspects 104 (2005) 101-109.
 C.-L. Yang, J. McGarrahan, J. Harard. Mater. B127 (2005) 40-47.
 F. Zidane, P. Droguin, B. Lekhlif, J. Bensaid, J.-F. Blais, S. Belcadi, K. El kacemi, J. Hazard. Mater. 155, 1-2 (2007) 153-163.
 I. Heidmann, W. Calmano, J. Hazard. Mater. 152, 3 (2008) 934-941.
 N. Meunier, P. Drogui, C. Montané, R. Hausler, G. Mercier, J.-F. Blais J. Hazard. Mater. 137, 1 (2006) 581-590.
 K. Bensadok, S. Benammar, F. Lapicque, G. Nezzal, J. Hazard. Mater. 152, 1 (2008) 423-430.
 P. Ca├▒izares, F. Mart├¡nez, C. Jiménez, C. S├íez, M.A. Rodrigo, J. Hazard. Mater. 151, 1 (2007) 44-51.
 M. U─ƒurlu, A. G├╝rses, ├ç. Do─ƒar, M. Yal├º─▒n, J. Environ. Manage. 87, 3 (2008) 420-428.
 Y.┼×. Y─▒ld─▒z, A.S. Koparal, B. Keskinler, Chem. Eng. J. 38, 1-3 (2008) 63-72.
 B. Zhu, D. A. Clifford, S. Chellam, Water Res. 39, 13 (2005) 3098- 3108.
 M.Y.A. Mollah, R. Schennach, J.R. Parge, D.L. Cocke, J. Hazard. Mater. B84 (2001) 29-41.
 M.Y.A. Mollah, P. Morkovsky, J.A.G. Gomes, M. Kesmez, J. Parga, D.L. Cocke, J. Hazard. Mater., B114, 1-3 (2004) 199-210.
 P.K. Holt, G.W. Barton, M. Wark, C.A. Mitchell, Colloids and Surfaces A: Physicochem. Eng. Aspects 211 (2002) 233-248.
 L.D. Benefield, J.F. Judkins, B.L. Weand, Process Chemistry for Water and Wastewater Treatment, Prentice-Hall, Englewood Cliffs, N.J., 1982.
 American Public Health Association. Standard methods for the examination of water and wastewater. Washington, DC: American Public Health Association, American Public Association (APHA), 1998.
 R.J. Hunter, Zeta potential in colloid science. Principles and Applications. Academic press Inc., 1981.
 E. Ofir, Y. Oren, A. Adin, Desalination 204 (2007) 87-93.
 M.S. Farooqui, Combined Electrooxidation and Electrocoagulation Processes for the Treatment of Municipal Wastewater. Master Thesis. King Fahd University of Petroleum and Minerals, Saudi Arabia, 2004.
 P. Drogui, M. Asselin, S.K. Brar, H. Benmoussa, J.-F. Blais, Sep. Purif. Technol. 61 (2007) 301-310.