Journal of Environmental Health Science & Engineering33CHEMICAL DENITRIFICATION OF NITRATE FROM GROUNDWATER VIA SULFAMIC ACID AND ZINC METAL141146A. SabzaliM. GholamiA. R. YazdanbakhshA. KhodadadiB. MusaviR. Mirzaee20151209Nitrate 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 washttps://ijehse.tums.ac.ir/index.php/jehse/article/view/83https://ijehse.tums.ac.ir/index.php/jehse/article/download/83/82