عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Artificial recharging of aquifers by retreated wastewater is one of the most important and practical methods for reusing wastewater. In order to simulate the physical conditions of artificial recharge basins, three cylindrical PVC columns with 30 cm in diameter and 250 cm in height were used. The columns filled with sandy-loam soil, and urban wastewater of Mahdasht in Alborz province were applied through the columns. Different covering materials such as geotextile and constructed coarse materials were utilized on top of the soil surface to evaluate the performance of the materials in terms of infiltration during permanently pounded condition. The values of total suspended solids, BOD5, COD, pH, EC in inflow and outflow of the column were measured in depth of 1m and 2m; the amounts of soil pH and soil EC used in the columns were measured before and after the experiments. The obtained results indicated a high efficiency in the soil columns covered by Geotextile in reducing suspended solids, BOD5, and COD by 67.7, 84.7, and 77 percent, respectively. These values for covering material were 51.1, 77.5, and 72.1 and for the control treatment 55.3, 70.4, and 57.3 percent, respectively. Providing the Geotextile and covering material’s debris are easy and cheap. In addition, these materials reduce pollutant transformation and can be changed or modified for improving the permeability of soil.