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Received: 2008-06-07

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.5 P.732-738


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

Author(s):  Wei-hai PANG, Nai-yun GAO, Yang DENG, Yu-lin TANG

Affiliation(s):  State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; more

Corresponding email(s):   gaonaiyun@sina.com

Key Words:  Photocatalytic reactor, Persistent organic pollutants (POPs), Reactor model

Wei-hai PANG, Nai-yun GAO, Yang DENG, Yu-lin TANG. Novel photocatalytic reactor for degradation of DDT in water and its optimization model[J]. Journal of Zhejiang University Science A, 2009, 10(5): 732-738.

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%DOI 10.1631/jzus.A0820501

T1 - Novel photocatalytic reactor for degradation of DDT in water and its optimization model
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A1 - Nai-yun GAO
A1 - Yang DENG
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DOI - 10.1631/jzus.A0820501

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 sol-gel. 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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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Open peer comments: Debate/Discuss/Question/Opinion


Anonymous@No address<No mail>

2011-06-26 22:56:49

1. Introduction

Photocatalytic reactors can be employed to eliminate pollutants

from water and air streams. Different photocatalytic reactor configurations

have been proposed for such applications. One of the most

promising alternatives is the fluidized bed photocatalytic reactor

(FBPR) (Dibble and Raupp 1992; Haarstrick et al. 1996; Chiovetta

et al. 2001; Kumazawa et al. 2003; Lee et al. 2004 2006; Lim and

Kim 2004 2005; Pozzo et al. 1999 2000 2005; Nelson et al. 2007).

Among the advantages offered by FBPRs are the efficient contact between

the catalyst and the pollutants the low mass transfer resistances

the low pressure drop and the high TiO2 surface exposure

to UV-radiation. Besides FBPRs with an annular-type configuration

could enable a more efficient use of the radiation emitted by UV


For design and optimization purposes modeling of the radiation

distribution inside photocatalytic reactors is essential because

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