Comments on “Use of Rh (III)-Heteropolymolybdate as Potential Catalysts for the Removal of Nitrates in Human Drinking Water: Synthesis, Characterisation and Catalytic Performance” by María A. Jaworski et al. (Water Air Soil Pollut (2018) 229: 309)
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The aim of this letter is to comment on some particular aspects and results presented in the above-mentioned article by Jaworski et al. From their Introduction section, and from the title itself, we assume the objective of this research was “the removal of nitrates in human drinking water.” To that end, the water product obtained after the catalysis must meet the requisites fixed by several institutions in terms of nitrates, nitrites, and ammonia content. Even though their intention was to convert nitrates into nitrogen via catalysis, the vast amount of articles published in this regard (Ruiz-Beviá and Fernández-Torres 2019) show that not all the nitrogen atoms from the nitrates were converted into nitrogen gas (desirable end product), but instead, a fraction of these atoms became nitrite and ammonium byproducts. Nitrite appears as an intermediate byproduct that, with more reaction-time, can be partially converted into ammonium. The intake of these non-desirable byproducts in water is...
KeywordsNitrate Catalytic reduction Ammonia byproduct Drinking water
- Jaworski, M. A., Bertolini, G. R., Cabello, C. I., Siri, G. J. & Casella, M. L. (2018). Use of Rh (III)-heteropolymolybdate as potential catalysts for the removal of nitrates in human drinking water: synthesis, characterisation and catalytic performance. Water, Air, & Soil Pollution, 229–309. https://doi.org/10.10407/s11270-018-3962-3.
- United States Environmental Protection Agency (EPA): 2018 Edition of the drinking water standards and health advisories tables. https://www.epa.gov/sites/production/files/2018-03/documents/dwtable2018.pdf.
- World Health Organization (WHO): 2006. Guidelines for drinking-water quality. https://www.who.int/water_sanitation_health/dwq/gdwq0506.pdf.
- World Health Organization. Regional Office for Europe: 2017. Drinking water parameter cooperation project. https://ec.europa.eu/environment/water/water-drink/pdf/WHO_parameter_report.pdf.