dor_id: 4132508

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la revista "Geofísica Internacional", se juzgan por medio de un proceso de revisión por pares

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Scientific Electronic Library Online (SciELO); SCOPUS, Dialnet, Directory of Open Access Journals (DOAJ); Geobase

561.#.#.u: https://www.geofisica.unam.mx/

650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1263/1245

100.1.#.a: Ryan, M.C.

524.#.#.a: Ryan, M.C. (1989). An investigation of inorganic nitrogen compounds in the groundwater in the Valley of México. Geofísica Internacional; Vol. 28 Núm. 2: Abril 1, 1989; 417-433. Recuperado de https://repositorio.unam.mx/contenidos/4132508

245.1.0.a: An investigation of inorganic nitrogen compounds in the groundwater in the Valley of México

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1989

264.#.1.c: 1989-04-01

653.#.#.a: Compuestos nitrogenados inorgánicos; Agua subterránea; Valle de México; Inorganic Nitrogenous Compounds; Groundwater; Valley of Mexico

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1263

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/1263

041.#.7.h: spa

520.3.#.a: A study of nitrogen compounds in the groundwater in the Valley of Mexico was prompted primarily by the closing of a series of wells in the southern part of the valley due to high ammonium concentrations. The study attempted to determine if the source of nitrogen compounds in the groundwater was from anthropogenic 50urces, namely wastewater (aguas negras). Wastewater is conducted throughout Mexico City in a network of unIined canals and is also used to irrigate agricultural fields within the valley. Nitrogen compounds were studied in particular because they are a widely recognized constituent of domestic waste and their geochemical processes are reasonably well understood. The principal known risk of nitrogen compounds in drinking water is methaemoglobinaemia, a health hazard to young children. A drinking water limit for nitrate of 10 mg/I as elemental N is recommended by the World Health Organization. Contaminated surface water and well water from various locations in the valley were sampled and analysed for geochemical and environmental isotope parameters. The results were compared in an attempt to identify the presence of the surface water in the well water. Unfortunately the characteristics of the surface water were generally not different enough from the well water to determine if widespread anthropogenic contamination was occurring anthropogenic contamination in recharge areas appears to be indicated by elevated nitrate concentrations in these areas. Anthropogenic contamination in the southern part of the valley (in the vicinity of Ramales Tecomitl. Tlahuac and Santa Catarina) was demonstrated by high ammonium concentrations and the presence of faecal coliforms in the groundwater. Althollgh wells completed belo,,"" the clay in the central part of the valley do not appear to be contaminated, we should not assume that the clay is impermeableand therefore offers complete protection from surface sources of contamination.doi: https://doi.org/10.22201/igeof.00167169p.1989.28.2.1037

773.1.#.t: Geofísica Internacional; Vol. 28 Núm. 2: Abril 1, 1989; 417-433

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

310.#.#.a: Trimestral

300.#.#.a: Páginas: 417-433

264.#.1.b: Instituto de Geofísica, UNAM

doi: https://doi.org/10.22201/igeof.00167169p.1989.28.2.1037

handle: 00e3d494b8a6e84f

harvesting_date: 2023-06-20 16:00:00.0

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file_creation_date: 2008-05-22 17:15:48.0

file_modification_date: 2022-07-19 14:52:39.0

file_creator: M. C

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245.1.0.b: An investigation of inorganic nitrogen compounds in the groundwater in the Valley of México

last_modified: 2023-06-20 16:00:00

license_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es

license_type: by-nc-sa

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