پديد آورندگان :
Sabzali A. نويسنده , Gholami M. نويسنده , Yazdanbakhsh A. R. نويسنده , Khodadadi A. نويسنده , Musavi B. نويسنده , Mirzaee R. نويسنده
چكيده لاتين :
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.
