Document Type : Research Paper
Authors
1 Member of Water and Sewer Company of Gilan, Rasht, Iran
2 Department of Civil Engineering, Tonekabon Branch, Islamic Azad University, Tonekabon, Iran.
Abstract
Application of N fertilizers in agricultural operations is one of the important sources of nitrate entry into groundwater. In Iran, especially in coastal areas with a high groundwater level, in agricultural areas, there is a risk of pollution of groundwater and surface water to nitrates. This research was conducted with the aim of determining the concentration of chemical parameters of drinking water wells in a Tonekabon village and comparing with acceptable standards. The present study was carried out on groundwater resources of Zawar village of Tonekabon city for six months and then data were analyzed to determine the concentration of chemical parameters and water resources type based on anions and cations in water. The results of this study during the investigation of different wells showed that the total number of samples tested from a drinking water well in Zawar, Tonekabon, the range of nitrate concentration from 8 to 33.7 mg / L, TDS from 233 to 435 mg in liters and the total hardness varied from 211 to 372 mg/L. According to the definition of pollution, the wells were classified in the permitted class in terms of nitrate. However, the approach of nitrate levels in some wells to 20 mg per liter (a sign of the impact of human activities) is also worthy of serious consideration. determining the quality of the area reduces the amount of nitrate in the groundwater and thus increases the quality of groundwater.
Keywords
Ehteshami M., Sharifi A., Modeling and assessment of Rey's groundwater quality, Journal of Environmental Science and Technology 31 (2007) 125-135.
Farshad A., Imandel K., Nitrate and nitrite in wells of industrial units in west of Tehran, Journal of School of Public Health and Institute of Public Health Research1 (2002) 33–44.
Imandal k., Physical and chemical properties of drinking water. Standard Booklet, No. 1052, Institute of Standards and Industrial Research of Iran (1997).
Kacaroglu F., Gunay G. Groundwater nitrate pollution in an alluvium aquifer, Eskisehir urban area in its vicinity, Turkey, Journal of Environmental Geology 3 (1997) 178-184.
Latif M., Mousavi S.F., Afyoni M., Velayatei S., Determination of nitrate pollution and its origin in groundwater of Mashhad Plain, Journal of Agricultural Sciences and Natural Resources 12 (2005) 32 -21.
Mazandaran map. From available site:http://www.maphill.com/iran/mazandaran/maps/physical-map/.
Nabihzadeh Nodehi R., Faezi Razi D., Guidelines for the quality of drinking water. First Edition. Tehran: Nasat Publishing (1997) 224.
Rahmani A., Shokohi R., Evaluation of groundwater quality in Bahar plain of Hamedan. The 10th National Conference on Environmental Health, Hamadan, 8-10 (2007).
Safari G., Vaezei F., Evaluation of the quality of drinking water in the city of Mianeh, The 6th National Conference on Environmental Health, Sari, (2003).
)