Environmental catalysis and materials

Remediation of sulfidic wastewater by catalytic oxidationwith hydrogen peroxide

Naveed Ahmad , Saikat Maitra , Binay Kanti Dutta , Farooq Ahmad


Received February 15, 2009,Revised July 28, 2009, Accepted , Available online

Volume 21,2009,Pages 1735-1740

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Oxidation of sulfide in aqueous solution by hydrogen peroxide was investigated in the presence of hydrated ferric oxide catalyst. The ferric oxide catalyst was synthesized by sol gel technique from ferric chloride and ammonia. The synthesized catalyst was characterized by Fourier transform infrared spectroscopy, X-Ray di raction analysis, scanning electrom microscope and energy dispersive X-ray analysis. The catalyst was quite e ective in oxidizing the sulfide by hydrogen peroxide. The e ects of sulfide concentration, catalyst loading, H2O2 dosing and temperature on the kinetics of sulfide oxidation were investigated. Kinetic equations and activation energies for the catalytic oxidation reaction were calculated based on the experimental results.

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