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Iranian Journal of Environmental Health, Science and Engineering
Iranian Association of Environmental Health (IAEH)
ISSN: 1735-1979
Vol. 3, No. 3, 2006, pp. 141-146
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Bioline Code: se06021
Full paper language: English
Document type: Research Article
Document available free of charge
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Iranian Journal of Environmental Health, Science and Engineering, Vol. 3, No. 3, 2006, pp. 141-146
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CHEMICAL DENITRIFICATION OF NITRATE FROM GROUNDWATER VIA SULFAMIC ACID AND ZINC METAL
Sabzali, A.; Gholami, M.; Yazdanbakhsh, A. R.; Khodadadi, A.; Musavi, B. & Mirzaee, R.
Abstract
Nitrate contamination in drinking water can cause methemoglobinemia, which is especially detrimental to infants and nursing mothers. Batch experiments in two units for catalytic reduction of nitrate from groundwater with Zn catalyst and sulfamic acid were conducted. The system includes chemical denitriphication (ChemDen reactor) and electrolytic recovery reactoers. A batch study was conducted to optimize parameters like pH, sulfamic acid concentration, Zn concentration, temperature and reaction time governing the ChemDen process. The concentrations of remained nitrate and Zn were measured at the end of the reactions. Results showed that near to 100% of nitrate decreased and the quantity of remained nitrate was <1 mg/L. pH and agitation had great effect on denitrification, and the nitrate removal rate changed rapidly when pH value ranged between 3-4. Two water quality parameters which limit this process were sulfate and chloride ions concentrations in nitrate contaminated water.
Keywords
Chemical denitrification, groundwater, zinc, sulfamic acid, electrolytic reactor
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© Copyright 2006 - Tehran University of Medical Sciences Publications
Alternative site location: http://diglib.tums.ac.ir/pub/
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