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Constraining nitrate contamination in a shallow urban aquifer: integrating stable nitrate isotope measurements and land use analysis.

Vystavna, Y. and Diadin, D. and Yakovlev, V. and Hejzlar, J. and Vadillo, I. and Huneau, F. and Lehmann, M. F.. (2017) Constraining nitrate contamination in a shallow urban aquifer: integrating stable nitrate isotope measurements and land use analysis. Environmental Earth Sciences, 76 (13). p. 463.

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Official URL: http://edoc.unibas.ch/57944/

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Abstract

A combined hydrochemical and stable isotope approach was used to investigate the origin of nitrate in the shallow unconfined groundwater of Kharkiv city, Eastern Ukraine. The contamination was investigated in the context of land use within the catchment area. The observed enrichment of sulfate, chloride and nitrate suggests significant groundwater contamination in the shallow urban aquifer, which is widely used as drinking water source for the urban population. Characteristic nitrate/chloride ratios as well as stable isotope ratios (N and O) of nitrate in the most contaminated springs confirmed that septic waste from leaky sewer systems was the main source of nitrate contamination in the groundwater. Nitrate contamination is linked to the type of land use and sewage treatment regime in the catchment area. It is also modulated by the regional hydrogeology, which determines the susceptibility of a given aquifer toward groundwater pollution. A more quantitative assessment of nitrate sources based on the nitrate isotope analysis alone is rather difficult. However, our study confirms that the combination of hydrochemical tracers, robust land-use analysis and nitrate stable isotope measurements represents a valuable approach to identify the origin of the nitrate contamination.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Umweltgeowissenschaften > Geochemie Stoffkreisläufe (Lehmann)
UniBasel Contributors:Lehmann, Moritz F
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer
ISSN:1866-6280
e-ISSN:1866-6299
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:28 May 2018 15:24
Deposited On:28 May 2018 15:24

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