New photocatalyst for decomposition of humic acids in photocatalysis and photo-Fenton processes

• Autorzy: Tryba B. , Brożek P. , Piszcz M. , Morawski A. W.
• Języki publikacji: EN

Abstrakty

EN

Humic acid Leonardite IHSS standard was decomposed on TiO2 and TiO2 modifi ed by FeC2O4 via the photocatalysis and photo-Fenton processes under UV irradiation. Humic acid (HA) were favorable adsorbed on TiO2 surface and followed decomposition during UV irradiation faster on TiO2 than on the modifi ed samples. However, when H2O2 was added to the solution, the photo-Fenton process occurred on the prepared TiO2 samples, contained iron together with photocatalysis and high acceleration of HA decomposition was observed. In this case the mineralization degree was much higher than in the applied photocatalysis only, around 75% HA (with concentration of 18 mg/L) was mineralized after 3 h of adsorption and 5 h of UV irradiation in the presence of H2O2 and modifi ed TiO2 whereas on TiO2 mineralisation of HA occurred in around 45% only. The measured fl uorescence spectra of HA solutions showed that in the presence of H2O2 polycyclic aromatics were rapidly oxidized to the lower size products such as alcohols, aldehydes, ketones and carboxylic acids, what accelerated the process of HA decomposition.

Słowa kluczowe

EN

humic acid (HA); photodecomposition; photo-Fenton process; TiO2; FeC2O4

PL

kwas huminowy; rozkład fotochemiczny; TiO2; FeC2O4

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2011
• Tom: Vol. 13, nr 4
• Strony: 8--14
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Tryba B.

autor

Brożek P.

autor

Piszcz M.

autor

Morawski A. W.

• West Pomeranian University of Technology, Szczecin, Institute of Chemical and Environment Engineering, ul. Pułaskiego 10, 70-322 Szczecin, Poland,

Bibliografia

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