Sulphur (IV) oxidation by oxygen in the presence of cobalt (II) ions in atmospheric waters

• Autorzy: Wilkosz I. , Smalcerz D.
• Języki publikacji: EN

Abstrakty

EN

The paper presents results of study on catalytic effect of Co(II) ions on the oxidation of S(IV) in aqueous solutions. Laboratory experiments were carried out at concentrations of reactants and pH found in atmospheric waters in heavily polluted atmospheres. The kinetic law parameters, i.e. the observed rate constant and the reaction order with respect to S(1Y) concentration, were determined. Depending on the initial pH of the reaction solution and Co (II) ion concentrations the S(D7) oxidation rates range between 2.2-10"8-1.6-10"5 moPdm"3^"1. The results obtained show that at an initial pH of 3.5- 5.0 catalytic activity of Co(II) is slight and it becomes significant at an initial pH of 6.0.

PL

W artykule przedstawiono wyniki badań nad katalitycznym działaniem jonów Co(II) na utlenianie S(PV) w roztworach wodnych. Badania laboratoryjne przeprowadzono przy stężeniach reagentów i pH roztworu spotykanych w wodach atmosferycznych na obszarach silnie zanieczyszczonych. Wyznaczono parametry równań kinetycznych tj. obserwowane stałe szybkości i rząd reakcji względem stężenia S(IV). W zależności od początkowego pH roztworu i stężeń jonów kobaltu szybkość reakcji utleniania zmieniała się w zakresie 2.2-10"*-1.6-10"5 mol-dm -s'1. Otrzymane wyniki wskazują, że przy początkowym pH roztworu w zakresie 3.5-5.0 aktywność katalityczna jonów Co(II) jest nieznaczna, staje się ona znacząca dopiero przy początkowym pH 6.0.

Słowa kluczowe

EN

atmospheric chemistry; atmospheric waters; cobalt; catalysis

PL

zanieczyszczenie powietrza; chemia atmosfery; kobalt; kataliza

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2011
• Tom: Vol. 4, no. 4
• Strony: 151--155
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Wilkosz I.

autor

Smalcerz D.

• Faculty of Energy and Environmental Engineering, Silesian University of Technology, Konarskiego 20, 44-100 Gliwice, Poland,

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