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Nitrate contamination of shallow groundwaters in Ontario, Canada

Authors
Journal
The Science of The Total Environment
0048-9697
Publisher
Elsevier
Publication Date
Volume
35
Issue
1
Identifiers
DOI: 10.1016/0048-9697(84)90368-1
Disciplines
  • Agricultural Science
  • Chemistry
  • Earth Science

Abstract

Abstract Highly elevated concentrations of NO 3 − have been found in the groundwaters from shallow aquifers at several locations in Ontario. The nitrate is derived either from the fertilizers applied to the agricultural soils, or from industrial point sources, and should be regarded as a major water quality problem. However, the nitrate levels may be reduced by denitrification processes under reducing conditions in the aquifer. The distributions of ammonia, chloride, dissolved oxygen, redox potential, methane, calcium and magnesium are presented and related to the hydrogeochemical changes undergone by the pollutant nitrate during flux along the groundwater flow systems.

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