Our results show that AO7 was successfully removed, synchronously in terms of its total color and total organic carbon, using integrated innovative technology by coupling the reduction system (nZVI-P) with the photodegradation process (nZnO-P).
📌 3 Key Takeaways
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Objective & Hypothesis:In this work, simultaneous synthesis{immobilization of nano zero-valent iron (reductive catalyst) and nano ZnO (photocatalyst) on perlite as a suitable bed (nZVI-P and nZnO-P) was done.
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Key Findings & Data:Three processes (reduction, oxidation, and reduction{oxidation) were evaluated for removal of azo dye C.I. acid orange 7 (AO7) from aqueous solution in a semibatch packed-bed reactor.
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Conclusion & Impact:Our results show that AO7 was successfully removed, synchronously in terms of its total color and total organic carbon, using integrated innovative technology by coupling the reduction system (nZVI-P) with the photodegradation process (nZnO-P).
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters
Abstract
In this work, simultaneous synthesis{immobilization of nano zero-valent iron (reductive catalyst) and nano ZnO (photocatalyst) on perlite as a suitable bed (nZVI-P and nZnO-P) was done. Three processes (reduction, oxidation, and reduction{oxidation) were evaluated for removal of azo dye C.I. acid orange 7 (AO7) from aqueous solution in a semibatch packed-bed reactor. Our results show that AO7 was successfully removed, synchronously in terms of its total color and total organic carbon, using integrated innovative technology by coupling the reduction system (nZVI-P) with the photodegradation process (nZnO-P). Thus, the coupling provided a superior solution for dye wastewater treatment. The kinetic results con rmed the pseudo- rst-order model for the Re{Ox process in all initial concentrations of the dye on the basis of P.
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Cite This Article
KHANI, A., SOHRABI, M. R., KHOSRAVI, M., DAVALLO, M. (2013). Enhancing puri cation of an azo dye solution in nanosized zero-valent iron-ZnO photocatalyst system using subsequent semibatch packed-bed reactor. Turkish Journal of Engineering and Environmental Sciences, Cilt: 37 - Sayı: 1, 91–99. https://ajindex.com/articles/368987
Agrawal, A. and Tratnyek, P.G., \Reduction of Nitro Aromatic Compounds by Zero-Valent Iron Metal", Environmental Science and Technology, 30, 153{160, 1996.
Antoine, G., \Degradation of Benomyl, Picloram, and Dicamba in a Conical Apparatus by Zero-Valent Iron Powder", Chemosphere, 43, 1109{1117, 2001.
Bahnemann, W., Muneer, M. and Haque, M.M., \Titanium Dioxide-Mediated Photocatalysed Degradation of Few Selected Organic Pollutants in Aqueous Suspensions", Catalysis Today, 124, 133{148, 2007.
Chakrabarti, S. and Dutta, B.K., \Photocatalytic Degradation of Model Textile Dyes in Wastewater using ZnO as Semiconductor Catalyst", Journal of Hazardous Materials, 112, 269{278, 2004.
Chang, J.H. and Cheng, S.F., \The Remediation Performance of a Specic Electrokinetics Integrated with Zero-Valent Metals for Perchloroethylene Contaminated Soils", Journal of Hazardous Materials, 131, 153{162, 2006.
Chang, M.C., Shu, H.Y. and Yu, H.H., \An Integrated Technique using Zero-Valent Iron and UV/H2O2 Sequential Process for Complete Decolorization and Mineralization of C.I. Acid Black 24 Wastewater", Journal of Hazardous Materials, 138, 574{581, 2006.
Cheng, Y., Sun, H., Jin, W. and Xu, N., \Eect of Preparation Conditions on Visible Photocatalytic Activity of Titania Synthesized by Solution Combustion Method", Chinese Journal of Chemical Engineering, 15, 178{183, 2007.
Damodar, R.A. and Swaminathan, J.T., \Decolourization of Reactive Dyes by Thin Film Immobilized Surface Photoreactor using Solar Irradiation", Solar Energy, 81, 1{7, 2007.
Daneshvar, N., Aber, S., Khani, A. and Khataee, A.R., \Study of Imidaclopride Removal from Aqueous Solution by Adsorption onto Granular Activated Carbon Using an On-Line Spectrophotometric Analysis System", Journal of Hazardous Materials, 144, 47{51, 2007a.
Daneshvar, N., Aber, S., Khani, A. and Rasoulifard, M.H., \Investigation of Adsorption Kinetics and Isotherms of Imidacloprid as a Pollutant from Aqueous Solution by Adsorption onto Industrial Granular Activated Carbon", Journal of Food, Agriculture and Environment, 5, 425{429, 2007b.
Daneshvar, N., Rasoulifard, M.H., Khataee, A.R. and Hosseinzadeh, F, \Removal of C.I. Acid Orange 7 from Aqueous Solution by UV Irradiation in the Presence of ZnO Nanopowder", Journal of Hazardous Materials, 143, 95{101, 2007c.
Daneshvar, N., Salari, D. and Khataee, A.R., \Photocatalytic Degradation of Azo Dye Acid Red 14 in Water on ZnO as an Alternative Catalyst to TiO2 ", Journal of Photochemistry and Photo