| Abstrakt: |
Water is one of the three vital elements needed for humanity by air and food, but we often overlook its importance (Zăvoianu, 2005). Water pollution is a topical issue with an important impact on ecological balances (http://www.mmediu.ro). Surface water comes from atmospheric precipitation, snow melting and springs, depending on the incline of the soil and the relief. (www.arin .ro) Normally, the water contains small amounts of nitrates. These result from mineralization of organic matter in water. (NIHWM). The origin of nitrates can be highly mineralized soil and rich in nitrogen, soil pollution with organic residues. (this is also the most common way of water pollution with nitrites) (http://www.scientia.ro). For the studies done in Gradinari village, Caras - Severin county, were collected water samples at a depth of 9, 10, 12 meters from the well. The harvesting was carried out both in winter and summer (October, December, February, May, July). For the values obtained from the analyzes carried out on the samples taken, the nitrite content in no case exceeded the maximum permitted limit of 0,50 mg/l. [ABSTRACT FROM AUTHOR] |
