The Effect of Wood Wool on Absorbing Oil Spills in Water Solutions Sahar Sadat Faezi1 *, Mohammad Hadi Abolhasani2 1-MSC student, Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan,Iran 2- Department of environmental, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan,Iran *Corresponding Author Email Address: sahar.faezi@khuisf.ac.ir Received: 28 Marh 2021 Accepted: 5 June 2021 Abstract Background and Purpose: The oil Spill in water pollution has happened in Iran since the beginning of oil extraction, and their gradual accumulation in the environment is a threat to water resources; therefore, it is necessary to develop new technologies to remove and clean the oil spill. There are different methods to remove oil spills and their derivatives. In the present research, wood wool waste as a cheap adsorbent was used to remove oil spills from wastewater. Materials and Methods: First, the chemical compound was determined using XRF and XRD analysis, next, absorption tests discontinuously were carried out using the laboratory solutions containing oil and the optimal absorption conditions were investigated by changing the factors affecting absorption, which included pH, initial concentration of the pollutant, contact time and amount of adsorbent on the amount of absorption at different levels, and at last, the use of adsorbent for laboratory effluent was studied. Findings: The effect of adsorbent during the equilibrium time to absorb oil using wood wool as an adsorbent was higher at 15 min than at other contact times with a significant difference (84% absorption rate: P<0.05), and the lowest absorption was shown at 3 min with a significant difference (60% absorption rate: P<0.05). The highest absorption rate of wood wool was observed at pH=3, which showed a significant difference with other pHs (75% absorption rate: P<0.05). There was no significant difference between the effect of the amount of wood wool as an absorbent at 5 min and 10 min (70.83% and 70% absorption, respectively: P<0.05), and the lowest percentage of absorption with a significant difference was observed at pH=7 (56% absorption rate: P<0.05). The highest percentage of absorption with a significant difference compared to other values was observed in 2gr (82% absorption rate: P<0.05). The effect of the absorbent values had no significant difference in 0.5 and 0.25gr (75% and 60% absorption, respectively: P<0.05); but the least percentage of absorption with a significant difference compared to other values were observed in 0.25gr (60% absorption rate: P<0.05). The fit of the adsorption isotherms showed that the absorption of oil by wood wool as an absorbent corresponds to the Freundlich adsorption isotherm (𝑅2=0.9822). پرونده مقاله