Document Type : Research Paper


1 PhD. Student., Department of Environmental Engineering, Faculty of Agriculture and Natural Resources, Islamic Azad University of Khorasgan, Isfahan, Iran

2 Assist. Prof., Department of Environment, Faculty of Agricultural Engineering and Natural Resources, Research Institute of Waste and Waste of Islamic Azad University of Isfahan (Khorasgan), Isfahan, Iran

3 B.Sc. Student., Department of Environmental Engineering, Faculty of Agriculture and Natural Resources, Isfahan Islamic Azad University, Isfahan, Iran


Organic hydrocarbons as a result of carcinogenesis and mutation caused many concerns. In this research, straw and chalk absorber was used as an organic adsorbent to remove oil pollution from wastewater. The adsorption experiments were performed discontinuously using oil-containing laboratory solutions. Optimum adsorption conditions were obtained by changing the factors affecting adsorption including pH, initial concentration of contaminant, contact time and adsorbent amount on adsorption at different levels, the oil absorption was determined by weighting method. Ultimately, the use of adsorbent for laboratory wastewater was studied. The highest absorbent efficiency at the time of equilibrium was observed for absorbing oil in 15 minutes a bout 28.85% absorbance, which did not have a significant difference with other contact times, which could be due to low contact time and the lowest value was observed with a significant difference of 3 minutes about 17.82% absorption, with the absorption rate being most significant in relation to the time of low, due to increased absorption time Increases. The highest rate of straw absorption was observed in pH = 7, which did not have a significant difference with other pH about36.95% absorption and the lowest percentage of adsorption was observed at pH = 9, which had no significant difference with other  pHs (19.09% absorption; P <0.05). The effect of straw absorbent values in 2 g/L was significantly higher than other amount of adsorbents about 61.05% absorption and the lowest percentage of adsorption was significantly different from other values in 0.25 and 0.5 grams per liter about 25.92%. Therefore, it can be concluded that the straw absorbent, in the form of adding more contact time, has a high efficiency in absorbing oil from wastewater and can be used in the treatment of industrial wastewater.


Main Subjects

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