ARTICULOS TECNICOS


Aplicación de isótopos ambientales en estudios de recursos hídricos en el Norte de Chile - 08  noviembre  2005
Los isótopos ambientales han sido ampliamente usados en estudios de recursos hídricos en Latinoamérica. El uso racional de las aguas subterráneas requiere de una evaluación del balance hídrico del acuífero de manera que la extracción no comprometa el recurso a largo plazo Varios de estos estudios se han realizado con el apoyo analítico del Laboratorio de Isótopos Ambientales de la Universidad de Waterloo (EIL).

Variabilidad Interanual en Relaciones Isótopos-Clima en el Artico Canadiense (en inglés) - 01  febrero  2006
La distribucion de isotopos estables en precipitacion provee informacion fundamental sobre la particion del presupuesto global atmosferico del agua y por lo tanto sobre aspectos claves del clima de la Tierra que no pueden ser discernidos por otros medios. Aunque existe una demanda continua para monitorear isotopos en precipitacion para definir funciones de input isotopico para estudios hidrologicos locales o para la calibracion de indicadores isotopicos de paleoclima, tambien esta creciendo conciencia del valor significativo de “snapshots” de los campos de isotopos de precipitacion como mapas de medidas de referencia (benchmark) del ciclo global del agua actual y de su evolucion dinamica . The Canadian Network for Isotopes in Precipitation (CNIP) incluye un conjunto de datos de 14 aos de medidas compuestas mensuales de isotopos estables de seis estaciones localizadas en las latitudes altas de Canada. Este conjunto de datos provee un reportaje espacial y temporal sin precedente del Artico Canadiense que permite una examen riguroso del clima de isotopos.

Application of Environmental Isotopes in Studies of Biodegradation of Organic Contaminants in Groundwater - 14  febrero  2006
Biodegradation can lead to transformation of organic contaminants in groundwater to non toxic products under natural conditions (natural attenuation) or as part of a engineered remediation strategy. However, it is often difficult to assess biodegradation at field sites because contaminant concentration vary also due to dilution and sorption or as function of varying water levels and groundwater flow directions. Analysis of stable isotope ratios is a possible way to trace biodegradation.

Environmental analysis at the Centre for Environmental and Information Technology - 14  febrero  2006
A state of the art trace metal clean room facility containing 4 variations of mass spectrometer is being constructed in the Centre for Environmental and Information Technology. The mass spectrometer is the most widely accepted detector of majorand trace-elements for environmental analysis. We will be using mass spectrometry for geochemical and isotope analyses of groundwater collected from metalcontaminated mining, power generation and industrial sites, and also from field and laboratory investigations of groundwater remediation. Methods based on mass spectrometry are among the most powerful, sensitive, and reliable available for water science research. Inductively coupled plasma mass spectrometry (ICP-MS) is an analytical technique which requires the sample (usually liquid) to be introduced to a high temperature plasma (a gas consisting of ions, generated by radio frequency magnetic fields), commonly argon, which dissociates molecules and ionizes atoms. The ions are passed into vacuum where a lens focuses the ion beam into a mass spectrometer. Here, the ions are sorted by mass and detected.

Possible Evidence for Isotopic Stratification of Glacial Lake Agassiz: 11,700-11,000 14C yr BP - 31  marzo  2006
In this study the researchers used two different types of archives, porewater and cellulose, to estimate the isotopic composition of Lake Agassiz from a core from the Montcalm site in the middle of the southern basin of Lake Agassiz. Montcalm

Site Characterization Techniques Using Fracture Minerals for Radioactive Waste Disposal - 31  marzo  2006
Fractures in crystalline rocks and the mineralogy contained within this part of the environment provide a means to assess the paleohydrologic and paleochemical history of the rock mass.

Geochemistry and Stable Isotopic Signatures, including Chlorine Isotopes of the Williston Basin (Canada - U.S.A.) - 31  marzo  2006


Comparison of Isotopic Time-Series Partitioning Analysis with an Evaporative Enrichment Model in Lake- and Wetland-Dominated River Basins, Mackenzie Basin, Canada - 31  marzo  2006
This poster demonstrates that the water isotope tracers, oxygen-18 and deuterium, can be coupled with hydrometeorological data to yield valuable insight about water balance and runoff generation processes in subarctic wetland regions.

 
 
Información de Contacto
Persona contacto: A. Richard Heemskerk
Título: Gerente
Teléfono: 1 (519) 888-4567 Ext. 35838
Fax: 1 (519) 746-7484
Dirección: 200 University Avenue West
Ciudad: Waterloo
Estado/Provincia: Ontario
Código postal: N2L 3G1
País: Canada
rkhmskrk@uwaterloo.ca
www.uweilab.ca
 
 
 
Enlaces
General Inquiries

eilab@uwaterloo.ca


Related links

Canadian Network for Isotopes in Precipitation

The CGU - HS Committee on Isotopic Tracers

 
 
 
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