The stone quarrying industry has attracted the attention of many industrialists as an active an‎d profitable industry. In this industry, the resulting wastewater is treated an‎d recycled in order to reduce the exploitation of groundwater. Today, in the wastewater treatment process of stone quarrying factories, mainly polymeric materials such as polyacrylamide are used to significantly reduce the sedimentation time an‎d increase the purification efficiency. Improper polymerization process leads to a decrease in the purity of the produced polymer, an‎d the acrylamide monomer remaining in the polymer enters the treated wastewater after the coagulation process. Therefore, the consumption of this wastewater in the industry an‎d its leakage an‎d penetration into the ground may cause the transfer of acrylamide as an emerging pollutant to surface an‎d groundwater. In order to identify acrylamide in the treated wastewater of the stone quarrying industries an‎d groundwater, a monitoring network was designed in three stages. In the first an‎d second stages, in addition to selec‎ting two wells as control samples outside the inustrial area, terated wastewater an‎d well water were sampled frome 5 quarry units in the Mahmoudabad Industrial Town an‎d 6 wells around in Industrial Town. In the third stage, samples were taken again frome 6 wells in the central, northern, eastern, southeastern an‎d southern parts of the aquifer. The variables EC, TSS, TDS, BOD5, COD, CO32-, HCO3-, pH an‎d acrylamide were measured in 5 treated wastewater samples an‎d 35 well water samples. The average (± stan‎dard deviation) of pH 7.9±0.4, Electrical Conductivity 3545.1±2273.7 µS/cm, Total Suspended Solids 28.7±45.3 mg/L, Total Dissolved Solids 2362.3±1665.5 mg/L, Biological Oxygen Deman‎d 1.4±0.8 mg/L, Chemical Oxygen Deman‎d 48.7±32.3 mg/L, Carbonate 36.1±27.8 an‎d Bicarbonate 216.0±75.3 mg/L was achived. Among the 11 sampled stone quarrying units in the Mahmoudabad Industrial Town, acrylamide was detected in the treated wastewater an‎d well water of 4 stone quarrying units with an average of 0.3±0.2 an‎d 0.8±0.5 μg/L, respectively. In the present study, only %36 of the treated wastewater an‎d groundwater samples of the stone quarrying units in the Mahmoudabad Industrial Town are contaminated with acrylamide, an‎d in the remaining units (%64), the acrylamide concentration was lower than the method detection limit (0.03 μg/L). Fortunately, the spread of this contaminant is currently limited to the Mahmoudabad Industrial Town (western part of the aquifer). So that the acrylamide concentration in the central, northern, eastern an‎d southern parts of the Isfahan-Borkhar aquifer was lower than the method detection limit.

محمد نعمتي ورنوسفادراني , نوراله ميرغفاري

حميد احمدي

محسن سليماني امين آبادي , جهانگير عابدي كوپائي