1992
DOI: 10.1016/0043-1354(92)90197-c
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The kinetics of Mn(II)-catalysed ozonation of oxalic acid in aqueous solution

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Cited by 88 publications
(33 citation statements)
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“…Moreover, Abdo et al [8] showed that Zn(II) and Cu(II) sulphates, Ag(I) nitrate and Cr(III) oxide presented catalytic effects during ozone decolouration of textile effluents. Similar results were reported by Gracia et al [9] in the case of ozonation of humic compounds in the presence of Mn(II) and Ag(I), and by Andreozzi et al [10] during ozonation of oxalic acid with Mn(II) at low pH.…”
Section: Introductionsupporting
confidence: 79%
“…Moreover, Abdo et al [8] showed that Zn(II) and Cu(II) sulphates, Ag(I) nitrate and Cr(III) oxide presented catalytic effects during ozone decolouration of textile effluents. Similar results were reported by Gracia et al [9] in the case of ozonation of humic compounds in the presence of Mn(II) and Ag(I), and by Andreozzi et al [10] during ozonation of oxalic acid with Mn(II) at low pH.…”
Section: Introductionsupporting
confidence: 79%
“…In all three studies bubbling of oxygen-ozone mixture in a reactor was applied. Opposite to this view, Andreozzi et al [11,12] claim, based on the study of Mn catalyzed chain ozonation of oxalic and malonic acid, that no OH radicals are produced in Mn(II) oxidation by ozone. The present article concerns the mechanism of the reaction between manganese(II) and ozone, the formation of the manganyl ion and the reduc-2ϩ (MnO ), tion of manganese(III) by hydrogen peroxide in acidic solution studied by stopped-flow and pulse-radiolysis techniques.…”
Section: Introductionmentioning
confidence: 93%
“…Dentre os íons estudados, Mn +2 apresentou maior eficiência na degradação do 2-clorofenol. Alguns trabalhos encontrados na literatura descrevem mecanismos de ozonização de ácido oxálico e glicoxálico utilizando Mn +2 como catalisador em um processo homogêneo, sugerindo que os mecanismos seguidos pelo processo catalisado e não catalisado em um mesmo valor de pH são diferentes, o que foi comprovado através da identificação dos subprodutos formados 10 . Quanto à remoção de carga orgânica pelo processo de ozonização na presença de Cu (II) observou-se que o processo é bastante ineficiente.…”
Section: Resultsunclassified
“…Diversos trabalhos relatam a utilização de inúmeros sais metálicos na ozonização de efluentes [9][10][11][12][13][14] . Hewes e Davinson 9 mostraram que a ozonização de efluentes na presença de Fe (II), Mn (II), Ni (II) e Co (II) resultou num aumento da eficiência de remoção de carbono orgânico total, em comparação ao processo de ozonização convencional (sem adição de catalisadores) 9 .…”
Section: Introductionunclassified
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