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Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems
The role of pyrite (FeS(2)) in the process of water treatment using metallic iron (Fe(0)) was investigated. FeS(2) was used as a pH-shifting agent while methylene blue (MB) and methyl orange (MO) were used as an indicator of reactivity and model contaminant, respectively. The effect of the final pH...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7841150/ https://www.ncbi.nlm.nih.gov/pubmed/33504819 http://dx.doi.org/10.1038/s41598-021-81649-y |
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author | Hu, Rui Cui, Xuesong Xiao, Minhui Gwenzi, Willis Noubactep, Chicgoua |
author_facet | Hu, Rui Cui, Xuesong Xiao, Minhui Gwenzi, Willis Noubactep, Chicgoua |
author_sort | Hu, Rui |
collection | PubMed |
description | The role of pyrite (FeS(2)) in the process of water treatment using metallic iron (Fe(0)) was investigated. FeS(2) was used as a pH-shifting agent while methylene blue (MB) and methyl orange (MO) were used as an indicator of reactivity and model contaminant, respectively. The effect of the final pH value on the extent of MB discoloration was characterized using 5 g L(−1) of a Fe(0) specimen. pH variation was achieved by adding 0 to 30 g L(−1) of FeS(2). Quiescent batch experiments with Fe(0)/FeS(2)/sand systems (sand loading: 25 g L(−1)) and 20 mL of MB were performed for 41 days. Final pH values varied from 3.3 to 7.0. Results demonstrated that MB discoloration is only quantitative when the final pH value was larger than 4.5 and that adsorption and co-precipitation are the fundamental mechanisms of decontamination in Fe(0)/H(2)O systems. Such mechanisms are consistent with the effects of the pH value on the decontamination process. |
format | Online Article Text |
id | pubmed-7841150 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-78411502021-01-29 Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems Hu, Rui Cui, Xuesong Xiao, Minhui Gwenzi, Willis Noubactep, Chicgoua Sci Rep Article The role of pyrite (FeS(2)) in the process of water treatment using metallic iron (Fe(0)) was investigated. FeS(2) was used as a pH-shifting agent while methylene blue (MB) and methyl orange (MO) were used as an indicator of reactivity and model contaminant, respectively. The effect of the final pH value on the extent of MB discoloration was characterized using 5 g L(−1) of a Fe(0) specimen. pH variation was achieved by adding 0 to 30 g L(−1) of FeS(2). Quiescent batch experiments with Fe(0)/FeS(2)/sand systems (sand loading: 25 g L(−1)) and 20 mL of MB were performed for 41 days. Final pH values varied from 3.3 to 7.0. Results demonstrated that MB discoloration is only quantitative when the final pH value was larger than 4.5 and that adsorption and co-precipitation are the fundamental mechanisms of decontamination in Fe(0)/H(2)O systems. Such mechanisms are consistent with the effects of the pH value on the decontamination process. Nature Publishing Group UK 2021-01-27 /pmc/articles/PMC7841150/ /pubmed/33504819 http://dx.doi.org/10.1038/s41598-021-81649-y Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Hu, Rui Cui, Xuesong Xiao, Minhui Gwenzi, Willis Noubactep, Chicgoua Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems |
title | Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems |
title_full | Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems |
title_fullStr | Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems |
title_full_unstemmed | Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems |
title_short | Characterizing the impact of pyrite addition on the efficiency of Fe(0)/H(2)O systems |
title_sort | characterizing the impact of pyrite addition on the efficiency of fe(0)/h(2)o systems |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7841150/ https://www.ncbi.nlm.nih.gov/pubmed/33504819 http://dx.doi.org/10.1038/s41598-021-81649-y |
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