The surface of quartz sand was modified by a dry method using Titanate coupling agent DN101 to improve the hydrophobic property of oil filter. The effects of reaction time
dosage of Titanate coupling agent DN101 and reaction temperature on the performance of the oil filter were studied by single factor experiment. The results show that the quartz sand modified by dry process using DN101 exhibits the best performance when the reaction time is 70 min
DN101 dosage 1.2% and reaction temperature 60℃. Lipophilic-Hydrophilic Ratio (LHR) increases from 1.25 to 11.1
the adsorption capacity has great improvement from 0.17 mg·g-1 to 0.25 mg·g-1 for 15.61 mg·L-1 oily wastewater and the oil removal rate of the modified quartz sand filter improves from 72.6% to 97.8% for 17.3 mg·L-1 oily wastewater. The analysis by SEM
XPS and FTIR shows that the chemical bonding combination of DN101 with the functional groups on quartz sand surface forms a uniform and stable cladding layer on the surface of quartz sand.