Photocatalytic Degradation of PT A Refined Waste water by TiO2/AC
A new photocatalytic treatment is proposed to deal with purified terephthalic acid(PTA)refined wastewater.The two-step method is used to prepare TiO2/activated carbon(AC)composite catalyst,then TiO2/AC are examined by X-ray diffraction(XRD),N2 adsorption desorption,and scanning electron microscopy(SEM).Under UV light,the photocatalytic performance of TiO2/AC is examined through the degradation of PTA refined wastewater.The experimental results show that the rutile crystalline TiO2 is distributed in the numerous micropores and mesopores of AC.The optimal photocatalytic reaction conditions are as follows:The COD removal rate of PTA refined wastewater is 64.24％at a calcination temperature of 500 ℃,with AC particle size of 0.2～0.3 mm,UV light power of 40 W,TiO2 loading of 11％,catalyst concentration of 7 g/L,and light duration of 7 hours.Additionally,TiO2/AC composite catalysts display remarkable reusability,and such treatment proves to be feasible and effective.
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