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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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In this research, we present a novel approach, enabling the measurement of nitrate concentrations in natural soil porewater containing natural soil dissolved organic carbon. This method can be used as the basis onto which an affordable and miniaturized nitrate monitoring sensor for soils can be developed. This sensor can play a significant role in reducing nitrate pollution in water resources, optimizing fertilizers application during agricultural activity, and decreasing food production costs.
Preprints
https://doi.org/10.5194/hess-2020-417
https://doi.org/10.5194/hess-2020-417

  10 Sep 2020

10 Sep 2020

Review status: a revised version of this preprint is currently under review for the journal HESS.

A novel analytical approach for the simultaneous measurement of nitrate and DOC in soil water

Elad Yeshno1, Ofer Dahan1, Shoshana Bernstain1, and Shlomi Arnon2 Elad Yeshno et al.
  • 1Department of Hydrology & Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Israel
  • 2Electrical and Computer Engineering Department, Ben-Gurion University of the Negev, Israel

Abstract. In this paper, we present a novel approach, enabling the measurement of nitrate concentrations in natural soil porewater containing natural soil dissolved organic carbon (DOC). The method is based on UV absorbance spectroscopy, combined with fluorescence spectroscopy, for simultaneous analysis of DOC and nitrate concentrations. The analytical procedure involves deduction of the absorption caused by the DOC from the total absorbance in the UV range that is attributed to both DOC and nitrate in the water solution. The analytical concept has been successfully tested in soil water samples obtained from five agricultural sites, as well as in water samples obtained from a commercial hummus soil mixture. We believe that the new analytical concept can provide a scientific foundation for developing a sensor for real-time nitrate concentration measurements in agricultural soils. As such, it can play a significant role in reducing nitrate pollution in water resources, optimizing input application in agriculture, and decreasing food production costs.

Elad Yeshno et al.

 
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Elad Yeshno et al.

Elad Yeshno et al.

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Short summary
In this research, we present a novel approach, enabling the measurement of nitrate concentrations in natural soil porewater containing natural soil dissolved organic carbon. This method can be used as the basis onto which an affordable and miniaturized nitrate monitoring sensor for soils can be developed. This sensor can play a significant role in reducing nitrate pollution in water resources, optimizing fertilizers application during agricultural activity, and decreasing food production costs.
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