| Coking wastewater is one kind of metallurgical wastewater. The coking plant effluent contains high concentrations of mineral and organic compound, such as ammonia, phenols, cyanide and other aromatic organics which concluded quinoline, indole, naphthalene, indene etc. Most of the substances are harmful to the environment. However, they are also hard to be disposed. So it is very essential to find an effective treatment to process to decompose coking wastewater to reach the demand of environment protection.Photocatalytic technology is focused as a new-type water treatment in recently. Photocatalytic technology has attracted great interest from 80 years last century, as it can mineralize the organic in wastewater. The organics can be decomposed to CO2 and H2O by the process of photo catalysis, however lose toxicity at last. Photocatalytic technology has no secondary pollution. It can be viewed as the most useful water treatment. It has made a quiet great advancement during last twenty years.The immobilized titanium dioxides used in the experiment in this article are produced by Nanjing high technology nano co.ltd. We used XRD to measure the titanium dioxide crystal form, crystal size and surface of titanium dioxide membranous. From the test result, it can be viewed that the immobilized titanium dioxide is anatase. Diameter of particle is form 30 to 100nm.We study the reaction of immobilized titanium dioxide photocatalyzing phenol solution. We ascertained the proper conditions on reaction and provided better evidences that can be used to evaluate the photocatalyst activity by researching the influence of physical parameters governing the kinetics, such as initial concentration of phenol C0, O3, light, pH of solution etc. We can make some conclusion: (1) We can find"C0> HRT > aeration quantity > pH"by compareison of the influence of physical parameters on photocatalyst activity; (2) According to economic cost, we find the best operating condition: pH=6, t=3h, aeration quantity=2L/min.
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