Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems

Abstract The role of pyrite (FeS2) in the process of water treatment using metallic iron (Fe0) was investigated. FeS2 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...

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Autores principales:	Rui Hu, Xuesong Cui, Minhui Xiao, Willis Gwenzi, Chicgoua Noubactep
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/48b82dce7f2e4fafb107ea91353bf4d7
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spelling	oai:doaj.org-article:48b82dce7f2e4fafb107ea91353bf4d72021-12-02T10:47:54ZCharacterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems10.1038/s41598-021-81649-y2045-2322https://doaj.org/article/48b82dce7f2e4fafb107ea91353bf4d72021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81649-yhttps://doaj.org/toc/2045-2322Abstract The role of pyrite (FeS2) in the process of water treatment using metallic iron (Fe0) was investigated. FeS2 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 Fe0 specimen. pH variation was achieved by adding 0 to 30 g L−1 of FeS2. Quiescent batch experiments with Fe0/FeS2/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 Fe0/H2O systems. Such mechanisms are consistent with the effects of the pH value on the decontamination process.Rui HuXuesong CuiMinhui XiaoWillis GwenziChicgoua NoubactepNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rui Hu Xuesong Cui Minhui Xiao Willis Gwenzi Chicgoua Noubactep Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems
description	Abstract The role of pyrite (FeS2) in the process of water treatment using metallic iron (Fe0) was investigated. FeS2 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 Fe0 specimen. pH variation was achieved by adding 0 to 30 g L−1 of FeS2. Quiescent batch experiments with Fe0/FeS2/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 Fe0/H2O systems. Such mechanisms are consistent with the effects of the pH value on the decontamination process.
format	article
author	Rui Hu Xuesong Cui Minhui Xiao Willis Gwenzi Chicgoua Noubactep
author_facet	Rui Hu Xuesong Cui Minhui Xiao Willis Gwenzi Chicgoua Noubactep
author_sort	Rui Hu
title	Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems
title_short	Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems
title_full	Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems
title_fullStr	Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems
title_full_unstemmed	Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems
title_sort	characterizing the impact of pyrite addition on the efficiency of fe0/h2o systems
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/48b82dce7f2e4fafb107ea91353bf4d7
work_keys_str_mv	AT ruihu characterizingtheimpactofpyriteadditionontheefficiencyoffe0h2osystems AT xuesongcui characterizingtheimpactofpyriteadditionontheefficiencyoffe0h2osystems AT minhuixiao characterizingtheimpactofpyriteadditionontheefficiencyoffe0h2osystems AT willisgwenzi characterizingtheimpactofpyriteadditionontheefficiencyoffe0h2osystems AT chicgouanoubactep characterizingtheimpactofpyriteadditionontheefficiencyoffe0h2osystems
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Characterizing the impact of pyrite addition on the efficiency of Fe0/H2O systems

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