Study on the degradation of dicofol via electrochemical oxidation process: simulation and validation

Document Type : Research Paper


1 DCU Water Institute, Dublin City University, Ireland

2 Petroleum and Chemical engineering department, Faculty of Engineering, Universiti Teknologi Brunei, Brunei Darussalam


In this work, the preparation and characterization of an iridium coated titanium anode (Ti/IrO2) and a ruthenium coated titanium anode (Ti/RuO2) for dicofol (DZ) degradation is examined using the electrochemical oxidation process (EO). X-ray diffraction (XRD) and scanning electron microscope (SEM) are used to characterize the metal oxide-coated anodes. The operating parameters in EO, including current density, electrolyte (NaCl) dose, pH, and electrolysis time for the degradation of dicofol, are studied in detail. Box-Behnken response surface design (BBD) incorporated in response surface methodology (RSM) is used to optimize and model the dicofol degradation process. The dicofol degradation and electrical energy consumption are taken as responses. Numerical optimization is used to determine the optimal conditions (current density of 0.1 A/m2, electrolyte dose of 3.5 mM, pH of 7, and electrolysis time of 8 min). Ninety-three percent of dicofol is degraded with an electrical energy consumption value of 0.75 KWh/m3 using Ti/IrO2 anode under optimal conditions.


Main Subjects

[1] Paździor, K., Bilińska, L., Ledakowicz, S. (2019). A review of the existing and emerging technologies in the combination of AOPs and biological processes in industrial textile wastewater treatment. Chemical engineering journal, 376, 120597.
[2] Ghanbari, F., Moradi, M. (2015). A comparative study of electrocoagulation, electrochemical Fenton, electro-Fenton and peroxi-coagulation for decolorization of real textile wastewater: Electrical energy consumption and biodegradability improvement. Journal of environmental chemical engineering, 3(1), 499-506.
[3] Zazou, H., Afanga, H., Akhouairi, S., Ouchtak, H., Addi, A.A., Akbour, R.A., Assabbane, A., Douch, J., Elmchaouri, A., Duplay, J., Jada, A., Hamdani, M. (2019). Treatment of textile industry wastewater by electrocoagulation coupled with electrochemical advanced oxidation process. Journal of water process engineering, 28, 214-221.
[4] Mollah, M., Morkovsky, P., Gomes, J., Kesmez, M., Parga, J., Cocke, D. (2004). Fundamentals, present and future perspectives of electrocoagulation. Journal of hazardous materials, 114(1-3), 199-210.
[5] Hendaoui, K., Ayari, F., Rayana, I.B., Amar, R.B., Darragi, F., Trabelsi-Ayadi, M. (2018). Real indigo dyeing effluent decontamination using continuous electrocoagulation cell: Study and optimization using response surface methodology. Process safety and environmental protection, 116, 578-589.
[6] Duan, J., Pang, S.-y., Wang, Z., Zhou, Y., Gao, Y., Li, J., Guo, Q., Jiang, J. (2021). Hydroxylamine driven advanced oxidation processes for water treatment: A review. Chemosphere, 262, 128390.
[7] Faouzi, A.M., Nasr, B., Abdellatif, G. (2007). Electrochemical degradation of anthraquinone dye Alizarin Red S by anodic oxidation on boron-doped diamond. Dyes and pigments, 73(1), 86-89.
[8] Panizza, M. and Cerisola, G. (2005). Application of diamond electrodes to electrochemical processes. Electrochimica acta, 51(2), 191-199.
[9] Aravind, P., Subramanyan, V., Ferro, S., Gopalakrishnan, R. (2016). Eco-friendly and facile integrated biological-cum-photo assisted electrooxidation process for degradation of textile wastewater. Water research, 93, 230-241.
[10] Brillas, E., Martínez-Huitle, C.A. (2015). Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods. An updated review. Applied catalysis B: Environmental, 166-167, 603-643.
[11] Martínez-Huitle, C.A., Rodrigo, M.A., Sirés, I., Scialdone, O. (2015). Single and coupled electrochemical processes and reactors for the abatement of organic water pollutants: A critical review. Chemical reviews, 115(24), 13362-13407.
[12] Rekhate, C.V., Srivastava, J.K. (2021). Effectiveness of O3/Fe2+/H2O2 process for detoxification of heavy metals in municipal wastewater by using RSM. Chemical engineering and processing  process intensification, 165, 108442.
[13] Flores, N., Brillas, E., Centellas, F., Rodríguez, R.M., Cabot, P.L., Garrido, J.A., Sirés, I. (2018). Treatment of olive oil mill wastewater by single electrocoagulation with different electrodes and sequential electrocoagulation/ electrochemical fenton-based processes. Journal of hazardous materials, 347, 58-66.
[14] Singh, B., Kumar, P. (2020). Pre-treatment of petroleum refinery wastewater by coagulation and flocculation using mixed coagulant: Optimization of process parameters using response surface methodology (RSM). Journal of water process engineering, 36, 101317.
[15] Martínez-Huitle, C.A., Panizza, M. (2018). Electrochemical oxidation of organic pollutants for wastewater treatment. Current opinion in electrochemistry, 11, 62-71.
[16] Meganathan, R., Varadarajan, R. (2021). Electro-oxidation of fish meal industry wastewater in a stirred batch reactor using a Ti/RuO2 anode. Water practice and technology, 16(4), 1488-1497.
[17] Raju, G.B., Karuppiah, M.T., Latha, S.S., Parvathy, S., Prabhakar, S. (2008). Treatment of wastewater from synthetic textile industry by electrocoagulation–electrooxidation. Chemical engineering journal, 144(1), 51-58.
[18] Chatzisymeon, E., Xekoukoulotakis, N.P., Coz, A., Kalogerakis, N., Mantzavinos, D. (2006). Electrochemical treatment of textile dyes and dyehouse effluents. Journal of hazardous materials, 137(2), 998-1007.
[19] Rajkumar, D., Palanivelu, K., Mohan, N. (2001). Electrochemical oxidation of resorcinol for wastewater treatment using Ti/TiO2-RuO2-IrO2 electrode. Journal of environmental science and health, Part A, 36(10), 1997-2010.
[20] Vahidhabanu, S., John Stephen, A. (2015). Effect of ruthenium oxide/titanium mesh anode microstructure on electrooxidation of pharmaceutical effluent. International journal of waste resources, 05(04) 1-5.
[21] Palma-Goyes, R.E., Guzmán-Duque, F.L., Peñuela, G., González, I., Nava, J.L., Torres-Palma, R.A. (2010). Electrochemical degradation of crystal violet with BDD electrodes: Effect of electrochemical parameters and identification of organic by-products. Chemosphere, 81(1), 26-32.