Separation of oily pollution from water and wastewater by low cost and reusable composite based on natural fibers

In this study, the activated carbon powder treated on the natural cotton fibers by a solvo-thermal method. Acetone and hydrazine used as solvent. The porous, low cost and hydrocarbon loving adsorbents obtained. Ultrasonic waves applied for homogeneous distribution of powder. Adsorbent characterization performed by FTIR and SEM analysis. Batch adsorption experiments carried out to remove the spill of motor engine oil on the water. Adsorption, desorption and reuse of the adsorbent were done in ۵ steps. The highest adsorption capacity was ۴۰.۲ g/g. After ۵ replicate of adsorbent reuse, the adsorption efficiency and recovery percentage were about ۹۰%. Continuous experiments performed by ۵۰۰ ml of two petrochemical and refinery wastewater samples with ۲ g of adsorbent at two different flowrates. The results showed that removal percentage of oil achieved to ۹۶%, in the inlet concentration less than ۴۰ g oil per each gram of adsorbent. By increasing the amount of inlet oil above ۴۰ g/g, the adsorption efficiency decreased. For these wastewater, by increasing the amount of adsorbent from ۲g to ۳ g, the oil pollution was completely absorbed. Therefore, this composite with acceptable performance can use for spill remove and continuous removal of oil pollutions from water and wastewater

کلیدواژه ها:

Oil pollution ، Wastewater treatment ، activated carbon ، Adsorption ، Water Reuse