Indian Journal of Chemical Technology

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Enhanced Sequestration of Commercial Auramine O Dye in a Fenton Oxidative Decolourization Process


Affiliations
1 Department of Environmental Engineering, Government Engineering College, Valsad 396 001, Gujarat, India
2 Department of Chemical Engineering, G H Patel College of Engineering and Technology, Vallabh Vidyanagar 388 120, Gujarat, India
 

The present work investigates the Fenton degradation of commercial Auramine O dye from a model solution through advanced oxidation process (AOP). The effects of initial pH, ferrous ion and H2O2 concentration have been evaluated with respect to the extent of decolourization of the feed solution. A maximum decolourization to the tune of 91.8% is accomplished at a pH of 3.0. The effect of various doses of Fe2+ and H2O2 on the percentage reduction in chemical oxygen demand (COD) is investigated at a constant pH. 84.9% reduction of COD is obtained using a combination of 48 mL/L H2O2 and 6 g/L Fe2+. The gas chromatography-mass spectrometry analysis reveals the presence of toxic non-biodegradable Auramine O dye in the model solution before the Fenton AOP, which is degraded into several compounds including CO2 after 30 min of Fenton AOP. The spectral output from FTIR analysis corroborates the molecular rearrangement during Fenton process with consequent degradation.

Keywords

Auramine O Dye Sequestration, Fenton Advanced Oxidation Process, Chemical Oxygen Demand, Gas Chromatography-Mass Spectrography.
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  • Enhanced Sequestration of Commercial Auramine O Dye in a Fenton Oxidative Decolourization Process

Abstract Views: 54  |  PDF Views: 30

Authors

Khyati K. Modi
Department of Environmental Engineering, Government Engineering College, Valsad 396 001, Gujarat, India
Kaushik Nath
Department of Chemical Engineering, G H Patel College of Engineering and Technology, Vallabh Vidyanagar 388 120, Gujarat, India

Abstract


The present work investigates the Fenton degradation of commercial Auramine O dye from a model solution through advanced oxidation process (AOP). The effects of initial pH, ferrous ion and H2O2 concentration have been evaluated with respect to the extent of decolourization of the feed solution. A maximum decolourization to the tune of 91.8% is accomplished at a pH of 3.0. The effect of various doses of Fe2+ and H2O2 on the percentage reduction in chemical oxygen demand (COD) is investigated at a constant pH. 84.9% reduction of COD is obtained using a combination of 48 mL/L H2O2 and 6 g/L Fe2+. The gas chromatography-mass spectrometry analysis reveals the presence of toxic non-biodegradable Auramine O dye in the model solution before the Fenton AOP, which is degraded into several compounds including CO2 after 30 min of Fenton AOP. The spectral output from FTIR analysis corroborates the molecular rearrangement during Fenton process with consequent degradation.

Keywords


Auramine O Dye Sequestration, Fenton Advanced Oxidation Process, Chemical Oxygen Demand, Gas Chromatography-Mass Spectrography.

References