UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles
- Autores
- Pabón Reyes, Deisy Carolina; Litter, Marta Irene
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The presence of arsenic in water for human consumption is a dramatic problem that causes serious health problems. Inorganic As species(As(III) or As(V)) are the most common and toxic forms, of which As(III) is the most harmful, mobile and difficult to remove; therefore,preoxidation into As(V) is generally performed in removal procedures. Irradiation using UV-Vis light is a way to enhance the oxidationof As(III) when using zerovalent iron nanoparticles (nZVI). In this study, As(III)-containing solutions of high concentrations (1–10 mgl−1) at a circumneutral pH were treated with commercial nZVI (with an average 50 nm particle size) using different molar ratios (MRs)of As(III) to total iron under UVC irradiation (with a 254 nm germicidal lamp). The optimal conditions for the treatment were an initialAs(III) concentration of 1 mg l−1, an MR = 1:30, and a pH of around 6. The oxidation was enhanced compared with that in experimentsin the dark and heightened with an increase in the amount of nZVIs. A mechanism was proposed. The most important features of this254 nm system are that the As(III) oxidation by the nanoparticles is enhanced by UVC irradiation, compared with that in the sameexperiments under UVA-Vis light (centered at 365 nm), because a higher amount of H2O2 is formed and adding external H2O2 is notneeded. The As(V) formed remains partially adsorbed onto the final iron products and partially dissolved in the suspension, from whichit can later be removed using conventional technologies. The process is efficient, low-cost, and easily scalable.
Fil: Pabón Reyes, Deisy Carolina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina - Materia
-
Arsenic
Zerovalent iron nanoparticles
UVC - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/291972
Ver los metadatos del registro completo
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UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticlesPabón Reyes, Deisy CarolinaLitter, Marta IreneArsenicZerovalent iron nanoparticlesUVChttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The presence of arsenic in water for human consumption is a dramatic problem that causes serious health problems. Inorganic As species(As(III) or As(V)) are the most common and toxic forms, of which As(III) is the most harmful, mobile and difficult to remove; therefore,preoxidation into As(V) is generally performed in removal procedures. Irradiation using UV-Vis light is a way to enhance the oxidationof As(III) when using zerovalent iron nanoparticles (nZVI). In this study, As(III)-containing solutions of high concentrations (1–10 mgl−1) at a circumneutral pH were treated with commercial nZVI (with an average 50 nm particle size) using different molar ratios (MRs)of As(III) to total iron under UVC irradiation (with a 254 nm germicidal lamp). The optimal conditions for the treatment were an initialAs(III) concentration of 1 mg l−1, an MR = 1:30, and a pH of around 6. The oxidation was enhanced compared with that in experimentsin the dark and heightened with an increase in the amount of nZVIs. A mechanism was proposed. The most important features of this254 nm system are that the As(III) oxidation by the nanoparticles is enhanced by UVC irradiation, compared with that in the sameexperiments under UVA-Vis light (centered at 365 nm), because a higher amount of H2O2 is formed and adding external H2O2 is notneeded. The As(V) formed remains partially adsorbed onto the final iron products and partially dissolved in the suspension, from whichit can later be removed using conventional technologies. The process is efficient, low-cost, and easily scalable.Fil: Pabón Reyes, Deisy Carolina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; ArgentinaAcademia2025-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/291972Pabón Reyes, Deisy Carolina; Litter, Marta Irene; UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles; Academia; Academia Nano: Science, Materials, Technology; 2; 4; 10-2025; 1-103065-9736CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.20935/AcadNano7928info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T15:01:53Zoai:ri.conicet.gov.ar:11336/291972instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-08-25 15:01:53.664CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| title |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| spellingShingle |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles Pabón Reyes, Deisy Carolina Arsenic Zerovalent iron nanoparticles UVC |
| title_short |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| title_full |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| title_fullStr |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| title_full_unstemmed |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| title_sort |
UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles |
| dc.creator.none.fl_str_mv |
Pabón Reyes, Deisy Carolina Litter, Marta Irene |
| author |
Pabón Reyes, Deisy Carolina |
| author_facet |
Pabón Reyes, Deisy Carolina Litter, Marta Irene |
| author_role |
author |
| author2 |
Litter, Marta Irene |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Arsenic Zerovalent iron nanoparticles UVC |
| topic |
Arsenic Zerovalent iron nanoparticles UVC |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
The presence of arsenic in water for human consumption is a dramatic problem that causes serious health problems. Inorganic As species(As(III) or As(V)) are the most common and toxic forms, of which As(III) is the most harmful, mobile and difficult to remove; therefore,preoxidation into As(V) is generally performed in removal procedures. Irradiation using UV-Vis light is a way to enhance the oxidationof As(III) when using zerovalent iron nanoparticles (nZVI). In this study, As(III)-containing solutions of high concentrations (1–10 mgl−1) at a circumneutral pH were treated with commercial nZVI (with an average 50 nm particle size) using different molar ratios (MRs)of As(III) to total iron under UVC irradiation (with a 254 nm germicidal lamp). The optimal conditions for the treatment were an initialAs(III) concentration of 1 mg l−1, an MR = 1:30, and a pH of around 6. The oxidation was enhanced compared with that in experimentsin the dark and heightened with an increase in the amount of nZVIs. A mechanism was proposed. The most important features of this254 nm system are that the As(III) oxidation by the nanoparticles is enhanced by UVC irradiation, compared with that in the sameexperiments under UVA-Vis light (centered at 365 nm), because a higher amount of H2O2 is formed and adding external H2O2 is notneeded. The As(V) formed remains partially adsorbed onto the final iron products and partially dissolved in the suspension, from whichit can later be removed using conventional technologies. The process is efficient, low-cost, and easily scalable. Fil: Pabón Reyes, Deisy Carolina. Universidad Nacional de San Martín. Instituto de Investigación en Ingeniería Ambiental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Litter, Marta Irene. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigación e Ingeniería Ambiental; Argentina |
| description |
The presence of arsenic in water for human consumption is a dramatic problem that causes serious health problems. Inorganic As species(As(III) or As(V)) are the most common and toxic forms, of which As(III) is the most harmful, mobile and difficult to remove; therefore,preoxidation into As(V) is generally performed in removal procedures. Irradiation using UV-Vis light is a way to enhance the oxidationof As(III) when using zerovalent iron nanoparticles (nZVI). In this study, As(III)-containing solutions of high concentrations (1–10 mgl−1) at a circumneutral pH were treated with commercial nZVI (with an average 50 nm particle size) using different molar ratios (MRs)of As(III) to total iron under UVC irradiation (with a 254 nm germicidal lamp). The optimal conditions for the treatment were an initialAs(III) concentration of 1 mg l−1, an MR = 1:30, and a pH of around 6. The oxidation was enhanced compared with that in experimentsin the dark and heightened with an increase in the amount of nZVIs. A mechanism was proposed. The most important features of this254 nm system are that the As(III) oxidation by the nanoparticles is enhanced by UVC irradiation, compared with that in the sameexperiments under UVA-Vis light (centered at 365 nm), because a higher amount of H2O2 is formed and adding external H2O2 is notneeded. The As(V) formed remains partially adsorbed onto the final iron products and partially dissolved in the suspension, from whichit can later be removed using conventional technologies. The process is efficient, low-cost, and easily scalable. |
| publishDate |
2025 |
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2025-10 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://hdl.handle.net/11336/291972 Pabón Reyes, Deisy Carolina; Litter, Marta Irene; UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles; Academia; Academia Nano: Science, Materials, Technology; 2; 4; 10-2025; 1-10 3065-9736 CONICET Digital CONICET |
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http://hdl.handle.net/11336/291972 |
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Pabón Reyes, Deisy Carolina; Litter, Marta Irene; UVC-enhanced oxidation of As(III) at neutral pH using zerovalent iron nanoparticles; Academia; Academia Nano: Science, Materials, Technology; 2; 4; 10-2025; 1-10 3065-9736 CONICET Digital CONICET |
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eng |
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