Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation
- Autores
- Senn, Alejandro Marcelo; Quici, Natalia
- Año de publicación
- 2023
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Dissolved inorganic nitrogen (DIN) species are key components of the nitrogen cycle and are the main nitrogen pollutants in groundwater. This study investigated the interconversion and removal of the principal DIN compounds ((Formula presented.), (Formula presented.) and (Formula presented.)) via UV light irradiation using a medium-pressure mercury lamp. The experiments were carried out systematically at relatively low nitrogen concentrations (1.5 mM) at varying pHs in the presence and absence of oxygen to compare the reaction rates and suggest the reaction mechanisms. (Formula presented.) was fully converted into (Formula presented.) at a pH > 3 in both oxic and anoxic conditions, and the reaction was faster when the pH was increased following a first-order kinetic at pH 11 (k = 0.12 min−1, R2 = 0.9995). (Formula presented.) was partially converted into (Formula presented.) only at pH 3 and in the presence of oxygen and was stable at an alkaline pH. This interconversion of (Formula presented.) and (Formula presented.) did not yield nitrogen loss in the solution. The addition of formic acid as an electron donor led to the reduction of (Formula presented.) to (Formula presented.). Conversely, (Formula presented.) was converted into (Formula presented.), (Formula presented.) and to an unidentified subproduct in the presence of (Formula presented.) at pH 10. Finally, it was demonstrated that (Formula presented.) and (Formula presented.) react via UV irradiation with stoichiometry 1:1 at pH 10 with the total loss of nitrogen in the solution. With these results, a strategy to remove DIN compounds via UV irradiation was proposed with the eventual use of solar light.
Fil: Senn, Alejandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
Fil: Quici, Natalia. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional; Argentina - Materia
-
INORGANIC NITROGEN
NITROGEN REMOVAL
PHOTOLYSIS
REACTIVE NITROGEN SPECIES - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/220957
Ver los metadatos del registro completo
id |
CONICETDig_b273dcb84997fdfaa529d03068350cae |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/220957 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV IrradiationSenn, Alejandro MarceloQuici, NataliaINORGANIC NITROGENNITROGEN REMOVALPHOTOLYSISREACTIVE NITROGEN SPECIEShttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Dissolved inorganic nitrogen (DIN) species are key components of the nitrogen cycle and are the main nitrogen pollutants in groundwater. This study investigated the interconversion and removal of the principal DIN compounds ((Formula presented.), (Formula presented.) and (Formula presented.)) via UV light irradiation using a medium-pressure mercury lamp. The experiments were carried out systematically at relatively low nitrogen concentrations (1.5 mM) at varying pHs in the presence and absence of oxygen to compare the reaction rates and suggest the reaction mechanisms. (Formula presented.) was fully converted into (Formula presented.) at a pH > 3 in both oxic and anoxic conditions, and the reaction was faster when the pH was increased following a first-order kinetic at pH 11 (k = 0.12 min−1, R2 = 0.9995). (Formula presented.) was partially converted into (Formula presented.) only at pH 3 and in the presence of oxygen and was stable at an alkaline pH. This interconversion of (Formula presented.) and (Formula presented.) did not yield nitrogen loss in the solution. The addition of formic acid as an electron donor led to the reduction of (Formula presented.) to (Formula presented.). Conversely, (Formula presented.) was converted into (Formula presented.), (Formula presented.) and to an unidentified subproduct in the presence of (Formula presented.) at pH 10. Finally, it was demonstrated that (Formula presented.) and (Formula presented.) react via UV irradiation with stoichiometry 1:1 at pH 10 with the total loss of nitrogen in the solution. With these results, a strategy to remove DIN compounds via UV irradiation was proposed with the eventual use of solar light.Fil: Senn, Alejandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); ArgentinaFil: Quici, Natalia. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional; ArgentinaMDPI2023-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/220957Senn, Alejandro Marcelo; Quici, Natalia; Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation; MDPI; ChemEngineering; 7; 5; 8-2023; 1-112305-7084CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2305-7084/7/5/79info:eu-repo/semantics/altIdentifier/doi/10.3390/chemengineering7050079info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:16:13Zoai:ri.conicet.gov.ar:11336/220957instacron: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:34982025-09-29 10:16:13.749CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
title |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
spellingShingle |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation Senn, Alejandro Marcelo INORGANIC NITROGEN NITROGEN REMOVAL PHOTOLYSIS REACTIVE NITROGEN SPECIES |
title_short |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
title_full |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
title_fullStr |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
title_full_unstemmed |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
title_sort |
Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation |
dc.creator.none.fl_str_mv |
Senn, Alejandro Marcelo Quici, Natalia |
author |
Senn, Alejandro Marcelo |
author_facet |
Senn, Alejandro Marcelo Quici, Natalia |
author_role |
author |
author2 |
Quici, Natalia |
author2_role |
author |
dc.subject.none.fl_str_mv |
INORGANIC NITROGEN NITROGEN REMOVAL PHOTOLYSIS REACTIVE NITROGEN SPECIES |
topic |
INORGANIC NITROGEN NITROGEN REMOVAL PHOTOLYSIS REACTIVE NITROGEN SPECIES |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
Dissolved inorganic nitrogen (DIN) species are key components of the nitrogen cycle and are the main nitrogen pollutants in groundwater. This study investigated the interconversion and removal of the principal DIN compounds ((Formula presented.), (Formula presented.) and (Formula presented.)) via UV light irradiation using a medium-pressure mercury lamp. The experiments were carried out systematically at relatively low nitrogen concentrations (1.5 mM) at varying pHs in the presence and absence of oxygen to compare the reaction rates and suggest the reaction mechanisms. (Formula presented.) was fully converted into (Formula presented.) at a pH > 3 in both oxic and anoxic conditions, and the reaction was faster when the pH was increased following a first-order kinetic at pH 11 (k = 0.12 min−1, R2 = 0.9995). (Formula presented.) was partially converted into (Formula presented.) only at pH 3 and in the presence of oxygen and was stable at an alkaline pH. This interconversion of (Formula presented.) and (Formula presented.) did not yield nitrogen loss in the solution. The addition of formic acid as an electron donor led to the reduction of (Formula presented.) to (Formula presented.). Conversely, (Formula presented.) was converted into (Formula presented.), (Formula presented.) and to an unidentified subproduct in the presence of (Formula presented.) at pH 10. Finally, it was demonstrated that (Formula presented.) and (Formula presented.) react via UV irradiation with stoichiometry 1:1 at pH 10 with the total loss of nitrogen in the solution. With these results, a strategy to remove DIN compounds via UV irradiation was proposed with the eventual use of solar light. Fil: Senn, Alejandro Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina Fil: Quici, Natalia. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional; Argentina |
description |
Dissolved inorganic nitrogen (DIN) species are key components of the nitrogen cycle and are the main nitrogen pollutants in groundwater. This study investigated the interconversion and removal of the principal DIN compounds ((Formula presented.), (Formula presented.) and (Formula presented.)) via UV light irradiation using a medium-pressure mercury lamp. The experiments were carried out systematically at relatively low nitrogen concentrations (1.5 mM) at varying pHs in the presence and absence of oxygen to compare the reaction rates and suggest the reaction mechanisms. (Formula presented.) was fully converted into (Formula presented.) at a pH > 3 in both oxic and anoxic conditions, and the reaction was faster when the pH was increased following a first-order kinetic at pH 11 (k = 0.12 min−1, R2 = 0.9995). (Formula presented.) was partially converted into (Formula presented.) only at pH 3 and in the presence of oxygen and was stable at an alkaline pH. This interconversion of (Formula presented.) and (Formula presented.) did not yield nitrogen loss in the solution. The addition of formic acid as an electron donor led to the reduction of (Formula presented.) to (Formula presented.). Conversely, (Formula presented.) was converted into (Formula presented.), (Formula presented.) and to an unidentified subproduct in the presence of (Formula presented.) at pH 10. Finally, it was demonstrated that (Formula presented.) and (Formula presented.) react via UV irradiation with stoichiometry 1:1 at pH 10 with the total loss of nitrogen in the solution. With these results, a strategy to remove DIN compounds via UV irradiation was proposed with the eventual use of solar light. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-08 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/220957 Senn, Alejandro Marcelo; Quici, Natalia; Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation; MDPI; ChemEngineering; 7; 5; 8-2023; 1-11 2305-7084 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/220957 |
identifier_str_mv |
Senn, Alejandro Marcelo; Quici, Natalia; Interconversion and Removal of Inorganic Nitrogen Compounds via UV Irradiation; MDPI; ChemEngineering; 7; 5; 8-2023; 1-11 2305-7084 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2305-7084/7/5/79 info:eu-repo/semantics/altIdentifier/doi/10.3390/chemengineering7050079 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844614104849842176 |
score |
13.070432 |