Photocatalytic degradation of the organic compounds enhanced by chemical oxidants

• Autorzy: Dziedzic J. , Nowak P. , Warszyński P. , Haber J.
• Konferencja: Proceedings of the European Summer School of Photovoltaics (04-07.07.2012 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

We demonstrated that more than 50% of humic acid may be removed from the solution simply by its adsorption on the titania surface if the concentration of TiO₂ in suspension is high enough. 100% removal of HA can be achieved even at relatively low dosage of TiO₂ (100 mg I−¹) if UV illumination of the suspension is applied for sufficiently long time (at least 3 hours). Addition of oxidant to the solution containing titania suspension and dissolved humic acid greatly enhances the activity of TiO₂ in the process of decomposition of organic substances. We showed that more than 90% conversion of HA can be obtained when sodium persulphate was applied as chemical oxidant already after one hour. Therefore, the synergistic effect was observed when TiO₂ and Na₂S₂O₈ were used simultaneously for the removal of humic substances. The photodecomposition efficiency of in the UV/TiO₂/Na₂S₂O₈ system was greater than of one with H₂ O₂ used as oxidant. Moreover, contrary to hydrogen peroxide, sodium persulphate is rather stable in room temperature. Therefore, use of Na₂S₂O₈ as oxidant supporting photocatalytic removal of humic substances from potable water should be preferred.

Słowa kluczowe

EN

photovoltaic

PL

fotowoltaika

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Elektronika : konstrukcje, technologie, zastosowania
• Rocznik: 2012
• Tom: Vol. 53, nr 6
• Strony: 115--117
• Opis fizyczny: Bibliogr. 12 poz., rys., wykr.

Twórcy

autor

Dziedzic J.

autor

Nowak P.

autor

Warszyński P.

autor

Haber J.

• Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Kraków

Bibliografia

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