Photocatalytic reduction of hexavalent chromium in aqueous solutions with zinc oxide nanoparticles and hydrogen peroxide

• Autorzy: Assadi, A. , Dehghani, M. H. , Rastkari, N. , Nasseri, S. , Mahvi, A. H.
• Języki publikacji: EN

Abstrakty

EN

Photocatalytic reduction of Cr(VI) to Cr(III) in aqueous solutions under UV irradiation and ZnO semiconductor catalyst was investigated using potassium dichromate as a model compound. The effects of pH, catalyst dose (0.05-0.15 g/dm3), Cr(VI) initial concentration (0.1-15 mg/dm3) and hydrogen peroxide concentration on photocatalytic reduction of Cr(VI) were investigated. The reduction rate of chromium was more favorable in acidic solution. Hydrogen peroxide was added as a reduction reagent for enhancement of the photoreduction. The process of photoreduction of Cr(VI) approximately followed first-order kinetics. Drinking water samples and wastewater were collected and photocatalytically treated for reduction of Cr(VI).

Słowa kluczowe

PL

katalizatory; związki chromu; woda utleniona; oczyszczanie ścieków; tlenek cynku; kinetyka pierwszego rzędu; chrom sześciowartościowy; fotoredukcja; redukcja fotokatalityczna

EN

catalysts; chromium compounds; hydrogen peroxide; wastewater treatment; zinc oxide; first order kinetics; hexavalent chromium; photoreduction; photocatalytic reduction

• Czasopismo: Environment Protection Engineering
• Rocznik: 2012
• Tom: Vol. 38, nr 4
• Strony: 5--16
• Opis fizyczny: Bibliogr. 28 poz., tab., rys.

Twórcy

autor

Assadi, A.

• Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R. Iran.

autor

Dehghani, M. H.

• Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R. Iran.,
• Tehran University of Medical Sciences, Center of Solid Waste Research (CSWR), Institute for Environmental Research (IER), P.O. Box 14155-6145, Tehran, I.R. Iran

autor

Rastkari, N.

• Tehran University of Medical Sciences, Center for Air Pollution Research (CAPR), Institute for Environmental Research (IER),Tehran, I.R. Iran

autor

Nasseri, S.

• Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R. Iran
• Tehran University of Medical Sciences, Center for Water Pollution Research (CWPR), Institute for Environmental Research (IER),Tehran, I.R. Iran

autor

Mahvi, A. H.

• Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R. Iran
• Tehran University of Medical Sciences, Center of Solid Waste Research (CSWR), Institute for Environmental Research (IER), P.O. Box 14155-6145, Tehran, I.R. Iran

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