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The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron

Fe(ii) ethylenediaminetetraacetate (EDTA) chelate solution is generally considered to be an effective nitric oxide (NO) absorbent. However, since the ferrous active site is occupied by nitric oxide and the ferrous chelate is oxidized to ferric chelate by oxygen in air, its absorption capacity will g...

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Detalles Bibliográficos
Autores principales: Jiang, Wei, Wang, Xiaolong, Xu, Qiang, Xiao, Jianbai, Wei, Xionghui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059285/
https://www.ncbi.nlm.nih.gov/pubmed/35521621
http://dx.doi.org/10.1039/c8ra08992b
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author Jiang, Wei
Wang, Xiaolong
Xu, Qiang
Xiao, Jianbai
Wei, Xionghui
author_facet Jiang, Wei
Wang, Xiaolong
Xu, Qiang
Xiao, Jianbai
Wei, Xionghui
author_sort Jiang, Wei
collection PubMed
description Fe(ii) ethylenediaminetetraacetate (EDTA) chelate solution is generally considered to be an effective nitric oxide (NO) absorbent. However, since the ferrous active site is occupied by nitric oxide and the ferrous chelate is oxidized to ferric chelate by oxygen in air, its absorption capacity will gradually decrease with the NO absorption process. Here, we propose a method for regenerating the NO-attenuated Fe(ii)EDTA solution by adding nanoscale zero-valent iron (NZVI) under three different pH conditions. Furthermore, compared with the commercially available iron powder, NZVI was also found to be effective not only for the regeneration of expired Fe-EDTA solution but also for the reduction of Fe(iii) EDTA solution. According to the results obtained herein, different acidity levels of solution, from weakly acidic to near neutral, are all suitable for the regeneration–absorption process.
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spelling pubmed-90592852022-05-04 The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron Jiang, Wei Wang, Xiaolong Xu, Qiang Xiao, Jianbai Wei, Xionghui RSC Adv Chemistry Fe(ii) ethylenediaminetetraacetate (EDTA) chelate solution is generally considered to be an effective nitric oxide (NO) absorbent. However, since the ferrous active site is occupied by nitric oxide and the ferrous chelate is oxidized to ferric chelate by oxygen in air, its absorption capacity will gradually decrease with the NO absorption process. Here, we propose a method for regenerating the NO-attenuated Fe(ii)EDTA solution by adding nanoscale zero-valent iron (NZVI) under three different pH conditions. Furthermore, compared with the commercially available iron powder, NZVI was also found to be effective not only for the regeneration of expired Fe-EDTA solution but also for the reduction of Fe(iii) EDTA solution. According to the results obtained herein, different acidity levels of solution, from weakly acidic to near neutral, are all suitable for the regeneration–absorption process. The Royal Society of Chemistry 2018-12-21 /pmc/articles/PMC9059285/ /pubmed/35521621 http://dx.doi.org/10.1039/c8ra08992b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Jiang, Wei
Wang, Xiaolong
Xu, Qiang
Xiao, Jianbai
Wei, Xionghui
The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron
title The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron
title_full The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron
title_fullStr The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron
title_full_unstemmed The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron
title_short The regeneration of Fe-EDTA denitration solutions by nanoscale zero-valent iron
title_sort regeneration of fe-edta denitration solutions by nanoscale zero-valent iron
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059285/
https://www.ncbi.nlm.nih.gov/pubmed/35521621
http://dx.doi.org/10.1039/c8ra08992b
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