Abstract: Taking the modified bentonite, n-butyl titanate and titanium tetrachloride from Xinjiang Wulanlingge as the raw material, PEG modified TiO₂/bentonite catalyst and TiO₂/pillared bentonite catalyst are prepared.Then these two catalysts are respectively applied to treat dyeing wastewater from a Xinjiang woolen mill, methylorange simulated wastewater and petrochemical wastewater.The research showed that PEG modified TiO₂/bentonite photocatalyst realized a maximum degradation rate to 87.67% at 2 h on methylorange simulated wastewater, and TiO₂/ pillared bentonite photocatalyst realized the highest degradation rate to 78.12% at on the degradation of petrochemical wastewater.Meanwhile, both above mentioned can reach the highest degeneration rates of 44.15% and 40.53% respectively at 2 h on Xinjiang woolen mill waste water.The recycling recovery on the PEG modified TiO₂/bentonite catalyst and the secondary degradation of woolen mill wastewater were also studied.

Key words: Modified bentonite, Titanium-pillared, Photocatalytic, Industry, Wastewater treatment