Novel photocatalytic reactor for degradation of DDT in water and its optimization model

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Weihai PANG Naiyun GAO Yang DENG Yulin TANG State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai China Department of Civil Engineering and Surveying University of Puerto Rico at Mayaguez Mayaguez PR USA [1 ,1 ,2 ,1 ,1 ,200092 ,2 ,681 ]
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A novel photocatalytic reactor was developed to remove (1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane) (DDT) from water. In the reactor, a cenosphere was used to support TiO2 film made by means of solgel. Because the cenospheres were coated with TiO2, their specific gravity was slightly increased from the original 0.6~0.8 to 0.8~0.9, so that they were able to be suspended in water. With the mixed operation of a bubbler, the water in the reactor was in a well-fluidized state. The bottom of the reactor is a sand filter bed, which can be used to prevent the photocatalyst from being lost. A mathematical model of the reactor has been developed in the two primary influential factors: ultraviolet (UV) light intensity and photocatalyst concentration. With such a model, the reactor can be designed more reasonably.
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页码:732 / 738
页数:7
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