Comparison of the effect of ozone, ozone-hydrogen peroxide system and catalytic ozonation on formaldehyde removal from aqueous model solutions

• Autorzy: Parisheva Z. , Nusheva L. , Licheva P.

Warianty tytułu

PL

Porównanie wpływu ozonu, ozonu wraz z nadtlenkiem wodoru i katalitycznego ozonowania na efektywność usuwania formaldehydu z modelowych roztworów wodnych

• Języki publikacji: EN

Abstrakty

EN

The effect of three oxidizing systems, i.e. ozone, ozone-H2O2 and catalytic ozonation in the presence of MnO2 and MoO3, on formaldehyde removal from aqueous solutions has been investigated. The effectiveness of the process has been estimated based on the degree of formaldehyde conversion. The influence of pH, the amount of hydrogen peroxide and catalysts and the effect of the proportion of the catalysts on the effectiveness of the process have been examined. It has been established that hydrogen peroxide and catalysts are able to enhance the ozone capability of oxidizing aqueous solutions of formaldehyde. An increase in the reactivity of the ozone-H2O2 system at pH 3.5 and pH 10 was higher than that in catalytic ozonation under the same experimental conditions. The highest degree of conversion for catalytic ozonation was achieved at pH 10 and at the ratio of MnO2 to MnO3 equal to 5.

PL

Zbadano wpływ trzech metod utleniania (ozonem, ozonem wraz z nadtlen-kiem wodoru i za pomocą katalitycznego ozonowania w obecności MnO2 i MoO3), na efektywność usuwania formaldehydu z roztworów wodnych. Sprawność procesu oceniano na podstawie stopnia transformacji formaldehydu. Przeanalizowano wpływ odczynu oraz dawek nadtlenku wodoru i katalizatorów, a także proporcji katalizatorów na sprawność procesu. Stwierdzono, że nadtlenek wodoru i katalizatory zwiększają skuteczność utleniania ozonem formaldehydu w roztworach wodnych. Zwiększenie stopnia konwersji dla układu ozon-H2O2 przy pH 3,5 i pH 10 było większe niż wypadku katalitycznego ozonowania w tych samych warunkach doświadczalnych. Najwyższy stopień konwersji dla katalitycznego ozonowania został osiągnięty przy pH 10 i stosunku testowanych katalizatorów wynoszącym 5.

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2004
• Tom: Vol. 30, nr 3
• Strony: 5--13
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Parisheva Z.

• Department of Chemistry, Technical University of Plovdiv, 8 Dustabanov St., Plovdiv, 4000, Bulgaria

autor

Nusheva L.

• Department of Chemistry, Technical University of Plovdiv, 8 Dustabanov St., Plovdiv, 4000, Bulgaria

autor

Licheva P.

• Department of Chemistry, Technical University of Plovdiv, 8 Dustabanov St., Plovdiv, 4000, Bulgaria

Bibliografia

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