Abstract:
Nitrogen is one of the most important elements for the sustaining of life, interfering in different phases of plants
and animal life. The forms in which the nitrogen appears in water are: molecular nitrogen – N2, nitrogen bounded in
various organic combinations, ammonia – NH3, ammonium – NH4
+
, nitrites – NO2
−
, nitrates – NO3
−
. The ammonia
nitrogen can result from a high number of sources. Its presence in the drinking water is limited by the legislation
(<0.5 mg/L – recommended by the World Organization of Health) because of its noxious effects on the consumers. In the
present paper were carried out studies regarding the possibilities of ammonium removal from underground water using the
ion exchange method. For the establishment of the optimum conditions of ammonium removal from underground waters it
was determined the dependence of the residual concentration of ammonium upon the initial concentration of ammonium in
water, the quantity of ion exchanger and the stirring time.
