The dyes are widely used in textile industry and causes various environmental problems. There are several methods available for removal of dyes from wastewater but they have been found to exhibit certain limitations. Among these methods, chemical coagulation (CC) and electrocoagulation process (EC) has been successfully used for the treatment of textile wastewater being attractive alternative. The objective of study is to investigate the performance of EC and CC for decolorization of vat dye and to compare between iron and aluminium as electrode and coagulant. The results show EC process had color removal efficiency higher than 90 % for both of Fe and Al electrode. The respective effects of operational parameters (initial dye concentration, reaction time, initial pH and applied voltage) had effect on color removal of EC. And the optimum conditions for Fe and Al electrode are 28 mg/L for initial dye concentration, 30 and 20 min for reaction time, 5 and 7 for initial pH and 30 volt for applied voltage respectively. A comparison with CC using the same amount of Fe and Al as in EC was also carried out. The EC process show more efficient process than CC process to treat vat dye solution. And for color removal of EC did not differ significantly between Al and Fe electrode.The application of EC to treat wastewater from textile household industries had color and COD removal efficiency higher than 80% and 60% respectively. It was concluded that the EC process is a competitive alternative process and presents a high potentiality for the treatment of color from textile wastewater.
Keywords: Electrocoagulation; Chemical Coagulation; Vat Dye; Iron Electrode; Aluminium Electrode
91 – 99.
Alshamsi, A. F., Albadwawi, A. S., Alnuaimi, M. M., Rauf, M. A., & Ashraf, S. S. (2007). Comparative efficienciesof the degradation of crystal violet using UV/hydrogen peroxide and Fenton’s reagent. Dyes Pigm, 74, 283-287.
An, C., Huang, C., Yao, Y., & Zhao, S. (2017). Emerging usage of electrocoagulation technology for oil removal from wastewater: A review. Science of The Total Environment, 579, 537-556.
Bassyouni, D. G., Hamad, H. A., El-Ashtoukhy, E-S. Z., Amin, N. K., & El-Latif, M. M. A. (2017). Comparative performance of anodic oxidation and electrocoagulation as clean processes for electrocatalytic degradation of diazo dye Acid Brown 14 in aqueous medium. Ecotoxicology and Environmental Safety, 335, 178-187.
Bayamoglu, M., Kobya, M., Can, O. T., & Sozbir, M., (2004). Operating cost analysis of electrocoagulation of textile dye wastewater. Separation and Purification Technology, 37, 117-125.
Cañizares, P., Martínez, F. A., Rodrigo, M., & Sáez, C., (2009). The pH as a key parameter in the choicebetween coagulation and electrocoagulation for the treatment of wastewaters. Journal of Hazardous Materials, 163, 158-164.
Daneshwar, N., Khataee, A. R., & Djafarzadeh, N. (2006). The use of artificial neural networks (ANN) for modeling of decolorization of textile dye solution containing C.I. Basic Yellow 28 by electrocoagulation process. Journal of Hazardous Materials, B137, 1788-1795.
Drouiche, N., Aoudj, S., Hecini, M., Ghaffour, N., Lounici, H., & Mameri, N. (2009). Study on thetreatment of photovoltaic wastewater using electrocoagulation: ﬂuoride removalwith aluminium electrodes characteristics of products. Journal of Hazardous Materials, 169, 65–69.
El-Ashtoukhy, E.-S. Z., Amin, N. K., & Abdel-Aziz, M. H. (2012). Decolorization of acid brown and reactive blue dyes by anodic oxidation in a batch recycle electrochemical reactor. International Journal of Electrochemical Science, 7, 11137-11148.
Fajardo, A. S., Martins, R. C., Silva, D. R., & Martínez-Huitle, C. A., Quinta-Ferreira, R. M. (2017). Dye wastewaters treatment using batch and recirculation flow electrocoagulation systems. Journal of ElectroanalyticalChemistry, 801, 30-37.
Hai, F. I., Yamamoto, K., & Fukushi, K. (2007). Hybrid treatment systems for dye wastewater. Critical Reviews in Environmental Science and Technology, 37, 315-377.
Hamad, H., Bassyouni, D., El-Ashtoukhy, E., Amin N., & El-Latif, M. A. (2018).Electrocatalytic degradation and minimization of specific energy consumption of synthetic azo dye from wastewater by anodic oxidation process with an emphasis on enhancing economic efficiency and reaction mechanism. Ecotoxicology and Environmental Safety, 148, 501-512.
Hutakamol, J. (2011). Dyeing cotton with vat dye by using the KU3 Yarn dyeing machine. Retrieved from http://newtdc.thailis.or.th/docview.aspx?tdcid=206566
Khadim, M., Kane, C., Oury Diallo, N., Mar Diop, C., Chauvet, F., Comtat, M., & TZedakis, T. (2016). Electrocoagulation process applied on pollutants treatmentexperimental optimization and fundamental investigation of the crystal violet dye removal. Journal of Environmental Chemical Engineering, 4, 4001 – 4011.
Kiliç, M. G., & Hoşten, C. (2010). A comparative study of electrocoagulation and coagulation of aqueous suspensions of kaolinite powders. Journal of Hazardous Materials, 176, 735-740.
Kobya, M., Can, O.T., & Bayramoglu, M. (2003) Treatment of textile wastewaters by electrocoagulation using iron and aluminum electrodes. Journal of Hazardous Materials, B100, 163-178.
Kobya, M., Hiz, H., Senturk, E., Aydiner, C., & Demirbas, E. (2006). Treatment of potato chips manufacturing wastewater by electrocoagulation. Desalination, 190, 201–211.
Kobya, M., Demirbas, E., Sik, F., & Oncel, S. (2015). Arsenic removal from groundwater of Sivas-Sarkila Plain, Turkey by electrocoagulation process: Comparing with iron plate and ball electrodes. Journal of Environmental Chemical Engineering, 3, 1096-1106.
Malakootian, M., Mansoorian, H. J., & Moosazadeh, M. (2010). Performance evaluation ofelectrocoagulation process using iron-rod electrodes for removing hardness fromdrinking water. Desalination, 255, 67–71.
Moussa, D. T., El-Naas, M. H., Nasser, M., & Al-Marri, M. J. (2017). A comprehensive review of electrocoagulation for water treatment: Potentials and challenges. Journal of Environmental Management, 186, 24-41.
Nandi, B. K., & Patel, S. (2017). Effects of operational parameters on the removal of brilliant green dye from aqueous solution by electrocoagulation. Arabian Journal of Chemistry, 10, S2961-S2968.
Vepsäläinen, M. (2012). Electrocoagulation in the treatment of industrial waters and wastewaters. VTT Science, 19, 96 – 50.
Verma, A. K. (2017). Treatment of textile wastewaters by electrocoagulation employing Fe-Al composite electrode. Journal of Water Process Engineering, 20, 168-172.
Verma, A. K., Dash, R. R., & Bhunia, P. (2012). A review on chemical coagulation/flocculation technologies form removal of colour from textile wastewaters. Journal of Environmental Management, 93, 154-168.
Xu, X., & Zhu, X. (2004). Treatment of refectory oily wastewater by electro-coagulation process. Chemosphere, 56, 889–894.
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