Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment

BACKGROUND Over recent years, several studies exploring new technologies capable of degrading persistent organochlorine compounds have been published. Special attention has been dedicated to atrazine (ATZ), due to its ecotoxicological relevance together with its frequent detection in the environmen...

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Principais autores:	Chiavone Filho, Osvaldo, Hollanda, Luana Rabelo, Graça, Cátia A. L., Andrade, Lidiane M., Mendes, Maria A., Teixeira, Antonio Carlos Silva Costa
Formato:	article
Idioma:	English
Publicado em:	Journal of Chemical Technology and Biotechnology
Assuntos:	Zero-valent-copper Atrazine Microalgae toxicity assays Organochlorines Intermediates identiﬁcation
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/45053
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spelling	ri-123456789-450532024-03-19T04:07:34Z Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment Chiavone Filho, Osvaldo Hollanda, Luana Rabelo Graça, Cátia A. L. Andrade, Lidiane M. Mendes, Maria A. Teixeira, Antonio Carlos Silva Costa Zero-valent-copper Atrazine Microalgae toxicity assays Organochlorines Intermediates identiﬁcation BACKGROUND Over recent years, several studies exploring new technologies capable of degrading persistent organochlorine compounds have been published. Special attention has been dedicated to atrazine (ATZ), due to its ecotoxicological relevance together with its frequent detection in the environment. Degradation of organochlorines via zero-valent metals has gained great importance given its practicality and versatility, zero-valent-iron (ZVI) being the most applied metal for this purpose. Alternatively, zero-valent-copper (ZVCu) was proved to exhibit higher reactivity against chlorinated aromatics, therefore deserving further investigation. RESULTS The optimum degradation conditions for ATZ removal with ZVCu were explored through a Doehlert experimental design. The same conditions were tested for the traditional ZVI, which confirmed that ZVCu was more reactive. The analysis of the degradation products suggests that both reductive and oxidative pathways coexist in the studied process. CONCLUSIONS ZVCu was effective in ATZ degradation, both by reductive and oxidation pathways, within a wide range of pH values, although faster in acidic media. The resulting solution from the experiment that promoted the fastest degradation is less toxic than ATZ against microalgae Chlorella vulgaris, which is a positive output regarding the application of this process as a pre-treatment step of ATZ-contaminated water matrices. © 2018 Society of Chemical Industry 2030 2021-11-29T14:41:52Z 2018-11-01 article HOLLANDA, Luana R.; GRAÇA, C. A. L.; ANDRADE, L. M.; MENDES, M. A.; CHIAVONE FILHO, Osvaldo; TEIXEIRA, A. C.S.C.. Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, v. 94, p. 1156-1164, 2019. Disponível em: https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.5862. Acesso em: 14 jul. 2021. https://doi.org/10.1002/jctb.5862. 1097-4660 https://repositorio.ufrn.br/handle/123456789/45053 10.1002/jctb.5862 en Journal of Chemical Technology and Biotechnology
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Zero-valent-copper Atrazine Microalgae toxicity assays Organochlorines Intermediates identiﬁcation
spellingShingle	Zero-valent-copper Atrazine Microalgae toxicity assays Organochlorines Intermediates identiﬁcation Chiavone Filho, Osvaldo Hollanda, Luana Rabelo Graça, Cátia A. L. Andrade, Lidiane M. Mendes, Maria A. Teixeira, Antonio Carlos Silva Costa Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment
description	BACKGROUND Over recent years, several studies exploring new technologies capable of degrading persistent organochlorine compounds have been published. Special attention has been dedicated to atrazine (ATZ), due to its ecotoxicological relevance together with its frequent detection in the environment. Degradation of organochlorines via zero-valent metals has gained great importance given its practicality and versatility, zero-valent-iron (ZVI) being the most applied metal for this purpose. Alternatively, zero-valent-copper (ZVCu) was proved to exhibit higher reactivity against chlorinated aromatics, therefore deserving further investigation. RESULTS The optimum degradation conditions for ATZ removal with ZVCu were explored through a Doehlert experimental design. The same conditions were tested for the traditional ZVI, which confirmed that ZVCu was more reactive. The analysis of the degradation products suggests that both reductive and oxidative pathways coexist in the studied process. CONCLUSIONS ZVCu was effective in ATZ degradation, both by reductive and oxidation pathways, within a wide range of pH values, although faster in acidic media. The resulting solution from the experiment that promoted the fastest degradation is less toxic than ATZ against microalgae Chlorella vulgaris, which is a positive output regarding the application of this process as a pre-treatment step of ATZ-contaminated water matrices. © 2018 Society of Chemical Industry
format	article
author	Chiavone Filho, Osvaldo Hollanda, Luana Rabelo Graça, Cátia A. L. Andrade, Lidiane M. Mendes, Maria A. Teixeira, Antonio Carlos Silva Costa
author_facet	Chiavone Filho, Osvaldo Hollanda, Luana Rabelo Graça, Cátia A. L. Andrade, Lidiane M. Mendes, Maria A. Teixeira, Antonio Carlos Silva Costa
author_sort	Chiavone Filho, Osvaldo
title	Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment
title_short	Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment
title_full	Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment
title_fullStr	Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment
title_full_unstemmed	Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment
title_sort	non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the doehlert experimental design, intermediates detection and toxicity assessment
publisher	Journal of Chemical Technology and Biotechnology
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/45053
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Non-traditional atrazine degradation induced by zero-valent-copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment

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