The influence of active carbon contaminants on the ozonation mechanism interpretation

Abstract In water treatment technology, activated carbons are used primarily as sorbents to remove organic impurities, mainly natural organic matter, but also as catalysts in the ozonation process. Commercially available activated carbons are usually contaminated with mineral substances, classified...

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Autores principales:	Lilla Fijołek, Joanna Świetlik, Marcin Frankowski
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dfb051d9a6914817a61146cc49265298
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spelling	oai:doaj.org-article:dfb051d9a6914817a61146cc492652982021-12-02T17:02:05ZThe influence of active carbon contaminants on the ozonation mechanism interpretation10.1038/s41598-021-89510-y2045-2322https://doaj.org/article/dfb051d9a6914817a61146cc492652982021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89510-yhttps://doaj.org/toc/2045-2322Abstract In water treatment technology, activated carbons are used primarily as sorbents to remove organic impurities, mainly natural organic matter, but also as catalysts in the ozonation process. Commercially available activated carbons are usually contaminated with mineral substances, classified into two main groups: alkali metals (Ca, Na, K, Li, Mg) and multivalent metals (Al, Fe, Ti, Si). The presence of impurities on the carbon surface significantly affects the pHpzc values determined for raw and ozonated carbon as well as their acidity and alkalinity. The scale of the observed changes strongly depends on the pH of the ozonated system, which is related to the diffusion of impurities from the carbon to the solution. In an acidic environment (pH 2.5 in this work), the ozone molecule is relatively stable, yet active carbon causes its decomposition. This is the first report that indirectly indicates that contaminants on the surface of activated carbon (multivalent elements) contribute to the breakdown of ozone towards radicals, while the process of ozone decomposition by purified carbons does not follow the radical path in bulk solution. Carbon impurities also change the distribution of the reaction products formed by organic pollutants ozonation, which additionally confirms the radical process. The study showed that the use of unpurified activated carbon in the ozonation of succinic acid (SA) leads to the formation of a relatively large amount of oxalic acid (OA), which is a product of radical SA degradation. On the other hand, in solutions with purified carbon, the amount of OA generated is negligible.Lilla FijołekJoanna ŚwietlikMarcin FrankowskiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lilla Fijołek Joanna Świetlik Marcin Frankowski The influence of active carbon contaminants on the ozonation mechanism interpretation
description	Abstract In water treatment technology, activated carbons are used primarily as sorbents to remove organic impurities, mainly natural organic matter, but also as catalysts in the ozonation process. Commercially available activated carbons are usually contaminated with mineral substances, classified into two main groups: alkali metals (Ca, Na, K, Li, Mg) and multivalent metals (Al, Fe, Ti, Si). The presence of impurities on the carbon surface significantly affects the pHpzc values determined for raw and ozonated carbon as well as their acidity and alkalinity. The scale of the observed changes strongly depends on the pH of the ozonated system, which is related to the diffusion of impurities from the carbon to the solution. In an acidic environment (pH 2.5 in this work), the ozone molecule is relatively stable, yet active carbon causes its decomposition. This is the first report that indirectly indicates that contaminants on the surface of activated carbon (multivalent elements) contribute to the breakdown of ozone towards radicals, while the process of ozone decomposition by purified carbons does not follow the radical path in bulk solution. Carbon impurities also change the distribution of the reaction products formed by organic pollutants ozonation, which additionally confirms the radical process. The study showed that the use of unpurified activated carbon in the ozonation of succinic acid (SA) leads to the formation of a relatively large amount of oxalic acid (OA), which is a product of radical SA degradation. On the other hand, in solutions with purified carbon, the amount of OA generated is negligible.
format	article
author	Lilla Fijołek Joanna Świetlik Marcin Frankowski
author_facet	Lilla Fijołek Joanna Świetlik Marcin Frankowski
author_sort	Lilla Fijołek
title	The influence of active carbon contaminants on the ozonation mechanism interpretation
title_short	The influence of active carbon contaminants on the ozonation mechanism interpretation
title_full	The influence of active carbon contaminants on the ozonation mechanism interpretation
title_fullStr	The influence of active carbon contaminants on the ozonation mechanism interpretation
title_full_unstemmed	The influence of active carbon contaminants on the ozonation mechanism interpretation
title_sort	influence of active carbon contaminants on the ozonation mechanism interpretation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/dfb051d9a6914817a61146cc49265298
work_keys_str_mv	AT lillafijołek theinfluenceofactivecarboncontaminantsontheozonationmechanisminterpretation AT joannaswietlik theinfluenceofactivecarboncontaminantsontheozonationmechanisminterpretation AT marcinfrankowski theinfluenceofactivecarboncontaminantsontheozonationmechanisminterpretation AT lillafijołek influenceofactivecarboncontaminantsontheozonationmechanisminterpretation AT joannaswietlik influenceofactivecarboncontaminantsontheozonationmechanisminterpretation AT marcinfrankowski influenceofactivecarboncontaminantsontheozonationmechanisminterpretation
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The influence of active carbon contaminants on the ozonation mechanism interpretation

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