the effect of maragheh industrial park wastewater on groundwatecontamination of maragheh-bonab plain aquiferr

maragheh-bonab active cultivated plain is located in south east of east azarbaijan and consists of valuable groundwater resources. maragheh industrial park is nearly located in the recharge area of this plain. kaveh soda and paper mill factories that are located in this park produce high volume of wastewater is continually recharged in the plain. in this article, the effect of industrial wastewater on the quality of groundwater has been considered. for this purpose, 92 water samples were collected from wells, springs, qanats and wastewaters in two periods and were analyzed chemically. the electric conductivity of wastewater in october 2006 has been measured as 167384 µs/cm and on the basis of hydro chemical analysis, the most important ions in wastewater are, cl- , ca2+, na+ and so42-, respectively. the concentration of these ions has unusually increased in samples taken from wells which located in 1.5 and 2 km far from wastewater site and two other drinking water wells (the khoshe mehr village water wells) which located in the central part of the plain. hydro chemical properties of these samples are the same as industrial wastewaters. therefore, the chemical anomalies created in the plain are resulted from wastewater recharge into groundwater resources.