بررسي ميزان غلظت نيترات و نيتريت در چاه هاي آب قابل شرب شهر اروميه در سال 1380

STUDY OF NITRATE AND NITRITE CONCENTRATION IN DRINKING WELLS WATER OF URMIA IN 2002

Background & Aim : Ground waters are the major Source in the providing water supply for cities and industrial areas. Nitrate and Nitrite are ions which exist in natural cycle of nitrogen as a part of it and are the most important chemical elements which mixing in the water and may have harmful effect on health. The present study was carried out to assess the concentration of nitrate and nitrite in potable wells water in Urmia. Materials and Methods: The method of study in this research is a cross sectional - descriptive. The number of 156 samples of water were taken from 39 deep wells within one year (4 seasons). The collected samples were examined by a spectrophotometer Dr 2000, and compared the results with WHO standard Levels. Results : Finding indicated that, the average years concentration of nitrate and nitrite in the samples were respectively (17.66 ppm and 0/0005 ppm) less than standard level. The maximum concentration of nitrate was in the winter season. T-test analysis was used for comparing nitrate in the different seasons. There was a significant difference between concentration of nitrate in winter season with others (P<0/05). Discussion: With respect to above results it is concluded that there was not any pollution of drinking water (wells) of Urmia with nitrate and nitrite. Thus it is recommended That, continous control and measuring of nitrate and nitrite is necessary to prevent of water from pollution.