Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)

The Arno River Basin (Central Italy) is affected by a considerable anthropogenic pressure due to the presence of large cities and widespread industrial and agricultural practices. In this work, 26 water samples from the Arno River and its main tributaries were analyzed to assess the water pollution...

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Autores: Chemeri, Lorenzo, Nisi, Barbara, Pierozzi, Andrea, Cabassi, Jacopo, Taussi, Marco, Venturi, Stefania, Delgado Huertas, Antonio, Vaselli, Orlando
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/406646
Acceso en línea:http://hdl.handle.net/10261/406646
https://doi.org/10.1016/j.jes.2025.03.064
Access Level:acceso abierto
Palabra clave:River geochemistry
Water pollution
Nitrogen stable isotopes
Surface water management
Water quality
Anthropogenic pollution
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spelling Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)Chemeri, LorenzoNisi, BarbaraPierozzi, AndreaCabassi, JacopoTaussi, MarcoVenturi, StefaniaDelgado Huertas, AntonioVaselli, OrlandoRiver geochemistryWater pollutionNitrogen stable isotopesSurface water managementWater qualityAnthropogenic pollutionThe Arno River Basin (Central Italy) is affected by a considerable anthropogenic pressure due to the presence of large cities and widespread industrial and agricultural practices. In this work, 26 water samples from the Arno River and its main tributaries were analyzed to assess the water pollution status. The geochemical composition of the Arno River changes from the source (dominated by a Ca-HCO3 facies) to the mouth (where a Na-Cl(SO4) chemistry prevails) with an increasing quality deterioration, as suggested by the Chemical Water Quality Index, due to anthropogenic contributions and seawater intrusion before flowing into the Ligurian Sea. The Ombrone and Usciana tributaries introduce anthropogenic pollutants into the Arno River, whilst Elsa tributary supplies significant contents of geogenic sulfate. The concentrations of dissolved nitrate and nitrite (up to 63 and 9 mg/L, respectively) and the respective isotopic values of δ15N and δ18O were also determined to understand origin and fate of the N-species in the Arno River Basin surface waters. The combined application of δ15N-NO3 and δ18O-NO3 and N-source apportionment modelling allowed the identification of soil organic nitrogen and sewage and domestic wastes as primary sources for dissolved NO3-. The δ15N-NO2 and δ18O-NO2 values suggest that the nitrification process affects the ARB waters, thus controlling the abundances and proportion of the N-species. Our work indicates that additional efforts are needed to improve management strategies to reduce the release of nitrogenated species to the surface waters of the Arno River Basin, since little progress has been made from the early 2000s.Peer reviewedElsevier BVDelgado Huertas, Antonio [0000-0002-7240-1570]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/406646https://doi.org/10.1016/j.jes.2025.03.064reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.jes.2025.03.064Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4066462026-05-22T06:33:51Z
dc.title.none.fl_str_mv Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
title Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
spellingShingle Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
Chemeri, Lorenzo
River geochemistry
Water pollution
Nitrogen stable isotopes
Surface water management
Water quality
Anthropogenic pollution
title_short Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
title_full Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
title_fullStr Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
title_full_unstemmed Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
title_sort Nitrogen and oxygen isotopes in nitrate and nitrite in the polluted surface waters from the Arno River Basin (Central Italy)
dc.creator.none.fl_str_mv Chemeri, Lorenzo
Nisi, Barbara
Pierozzi, Andrea
Cabassi, Jacopo
Taussi, Marco
Venturi, Stefania
Delgado Huertas, Antonio
Vaselli, Orlando
author Chemeri, Lorenzo
author_facet Chemeri, Lorenzo
Nisi, Barbara
Pierozzi, Andrea
Cabassi, Jacopo
Taussi, Marco
Venturi, Stefania
Delgado Huertas, Antonio
Vaselli, Orlando
author_role author
author2 Nisi, Barbara
Pierozzi, Andrea
Cabassi, Jacopo
Taussi, Marco
Venturi, Stefania
Delgado Huertas, Antonio
Vaselli, Orlando
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Delgado Huertas, Antonio [0000-0002-7240-1570]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv River geochemistry
Water pollution
Nitrogen stable isotopes
Surface water management
Water quality
Anthropogenic pollution
topic River geochemistry
Water pollution
Nitrogen stable isotopes
Surface water management
Water quality
Anthropogenic pollution
description The Arno River Basin (Central Italy) is affected by a considerable anthropogenic pressure due to the presence of large cities and widespread industrial and agricultural practices. In this work, 26 water samples from the Arno River and its main tributaries were analyzed to assess the water pollution status. The geochemical composition of the Arno River changes from the source (dominated by a Ca-HCO3 facies) to the mouth (where a Na-Cl(SO4) chemistry prevails) with an increasing quality deterioration, as suggested by the Chemical Water Quality Index, due to anthropogenic contributions and seawater intrusion before flowing into the Ligurian Sea. The Ombrone and Usciana tributaries introduce anthropogenic pollutants into the Arno River, whilst Elsa tributary supplies significant contents of geogenic sulfate. The concentrations of dissolved nitrate and nitrite (up to 63 and 9 mg/L, respectively) and the respective isotopic values of δ15N and δ18O were also determined to understand origin and fate of the N-species in the Arno River Basin surface waters. The combined application of δ15N-NO3 and δ18O-NO3 and N-source apportionment modelling allowed the identification of soil organic nitrogen and sewage and domestic wastes as primary sources for dissolved NO3-. The δ15N-NO2 and δ18O-NO2 values suggest that the nitrification process affects the ARB waters, thus controlling the abundances and proportion of the N-species. Our work indicates that additional efforts are needed to improve management strategies to reduce the release of nitrogenated species to the surface waters of the Arno River Basin, since little progress has been made from the early 2000s.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/406646
https://doi.org/10.1016/j.jes.2025.03.064
url http://hdl.handle.net/10261/406646
https://doi.org/10.1016/j.jes.2025.03.064
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.jes.2025.03.064
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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