PERFORMANCE COMPARISON OF UV, UV/H2O2, UV/Fe2+, H2O2/Fe2+, UV/H2O2/Fe2+ PROCESSES IN THE REMOVAL OF COD AND COLOR FROM TEXTILE WASTEWATER

Abstract

In this study, the removal of chemical oxygen demand (COD) and color from textile industry wastewater were investigated in comparison with UV, UV/H2O2, UV/Fe2+, H2O2/Fe2+, UV/H2O2/Fe2+ processes. Initial pH, hydrogen peroxide dosage, ferrous iron dosage, and UV radiation were selected as variables. A maximum of 95.65% COD and 98.52% color removal were achieved by the photo-Fenton method. Another effective method was Fenton process by which 83.76% COD and 80.44% color removal efficiencies were obtained. It was concluded that the Fe2+/H2O2 process (Fenton) with UV light (photo-Fenton) can provide higher removal efficiencies in shorter process times in the treatment of textile wastewater.

Keywords

• Textile wastewater
• COD
• Color
• Photo-Fenton
• UV/H2O2/Fe2+

References

1. [1] Silva, G.M., Moreira, F.C., Alice, M., Mazur, L.P., Souza, A.U., Boaventura, A.R., Vilar, J.P, (2020), Integration of Fenton's reaction based processes and cation exchange processes in textile wastewater treatment as a strategy for water reuse, Journal of Environmental Management, 272, 111082.
2. [2] Pereda, B.R., Gallegos, A.A., Terrones, Y.A, Silva, S., Perez, A.H., (2020), Effective Electro-Fenton Treatment for Real Textile Effluent. A Case Study, Journal of Water Engineering, 37, 101434.
3. [3] Asghar, A., Raman, A.A. and Daud, W.M., (2015), Advanced oxidation processes for in-situ production of hydrogen peroxide/hydroxyl radical for textile wastewater treatment: a review, Journal of Cleaner Production, 87, 826-838.
4. [4] Kang, S.F., Liao, C.H. and Po, S.T., (2000), Color removal of textile wastewater by photo-fenton oxidation technology, Chemosphere, 41, -1287-1294.
5. [5] Bali, U., Çatalkaya, E. and Şengül, F., (2004), Photodegradation of Reactive Black 5, Direct Red 28 and Direct Yellow 12 using UV, UV/ H2O2 and UV/ H2O2/Fe2+: a comparative study, Journal of Hazardous Materials, B-114, 159-166.
6. [6] Ghanbari, F. and Moradi, M., (2015), A comparative study of electrocoagulation, electrochemical Fenton, electro-Fenton and peroxi-coagulation for color removal of real textile wastewater: Electrical energy consumption and biodegradability improvement, Journal of Environmental Chemical Engineering, 3, 499-506.
7. [7] Perez, M., torrades, F., Domenech, X. and Peral, J., (2002), Fenton and photo-Fenton oxidation of textile effluents, Water Research, 36, 2703-2710.
8. [8] Gilpavas, E., Gomez, I.D. and Garcia, M.A.G., (2018), Optimization of solar-driven photo-electro-Fenton process for the treatment of textile industrial wastewater, Journal of Water Process Engineering, 24, 49-55.

9. [9] Gilpavas, E., Gomez, I.D. and garcia, M.A.G., (2019), Optimization and toxicity assessment of a combined electrocoagulation, H2O2/ Fe2+/UV and activated carbon adsorption for textile wastewater treatment, Science of the Total Environment, 651, 551-560.
10. [10] Sreeja, P.H. and Sosamony, K.J., (2016), A Comparative Study of Homogeneous and Heterogeneous Photo-Fenton Process for Textile Wastewater Treatment, Procedia Technology, 24, 217-223.
11. [11] Rott, E., Minke, R., Bali, U. and Steinmetz, H., (2017), Removal of phosphonates from industrial wastewater with UV/Fe(II), Fenton and UV/Fenton treatment, Water Research, 122, 345-354.
12. [12] Zhang, H., Choi, H.J. and Huang, C.P., (2005), Optimization of Fenton process for the treatment of landfill leachate, Journal of Hazardous Materials, B125, 166-174.
13. [13] Umar, M., Aziz, H.A. and Yusoff, M.S., (2010), Review: Trends in the use of Fenton, electro-Fenton and photo-Fenton for the treatment of landfill leachate, Waste Management, 30, 2113-2121.
14. [14] Rice, E.W., Baird, R.B., Eaton, A.D., and Bridgewater, L.L., (2012), Standard Methods in Examination of Water and Wastewater, twenty-three ed. Water Environment Federation, American Public Health Association, American Water Works Association (APHA-AWWA).