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Revista DAE
Article . 2022
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Degradação de metil e propil parabenos usando sistemas O3/H+, O3/OH- e O3/Mn2+

Authors: Eliel Albuquerque Aguiar; Jéssica Rocha de Lima; Aluísio Marques da Fonseca; Bruno César Barroso Salgado; Rinaldo dos Santos Araújo;

Degradação de metil e propil parabenos usando sistemas O3/H+, O3/OH- e O3/Mn2+

Abstract

Este estudo teve como objetivo avaliar a degradação do metil e propil parabenos pelo processo de ozonização em meios ácido (pH = 5), alcalino (pH = 10) e catalítico (Mn2+, pH = 3). Os estudos cinéticos foram conduzidos a temperatura ambiente (27°C) para uma dosagem constante de 79 g/m3 de O3 na concentração inicial de 50 mg/L. Os resultados mostraram uma degradação de 100% para ambos os parabenos após 3 min de reação para o sistema alcalino. A cinética de degradação dos parabenos foi descrita pelo modelo cinético de primeira ordem com R2 entre 0,990 e 0,999. A ozonização alcalina (O3/OH-) apresentou constantes de velocidade de duas a três vezes superiores às observadas em meio ácido e catalítico. A não toxicidade das amostras tratadas frente à Artemia salina foi confirmada apenas para os processos de ozonização ácida e catalítica. Em geral, os resultados de degradação dos parabenos para os sistemas de ozonização aplicados foram promissores, embora os sistemas ácido e catalítico sejam os ambientalmente mais aceitáveis. Palavras-chave: Ozônio. Parabenos. Degradação. Cinética. Toxicidade.

Keywords

Environmental engineering, toxicidade, degradação, TA170-171, Environmental technology. Sanitary engineering, cinética, Environmental sciences, parabenos, GE1-350, ozônio, TD1-1066

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
gold