Study Of Photocatalytic Degradation Of Acid Blue In Wastewater By Immobiled TiO₂

TiO₂ semis-conductor light catalyst has a high stability and bear the light corrosion, not poisonous characteristics, and do not produce two pollutions during period of handle, after TiO₂ lights stir up, the output empty cave can oxidize humidity the son creation the strong oxidize free radicals of (OH) sex, it can make in shorter time water in difficult decline the organic matter mineral of solution to turn; If in order to radiate energy, ether sunlight can lower the processing cost consumedly, economizing energy, so a kind of to have widespread function to sweep the processing technique efficiently, is a little bit hot problem that the domestic and international scholar study.This literary the grace makes the light catalyst with coke the immobilized nanosized TiO₂ in the addition is a little the amount to the lead to the oxidize hydrogen, the projecting light the upon in the purple and outside the light or the sun light under, to organic the acidity blue 62 dyestuff the waste waters the carried on the taking off the color experiment research, this research belonged to a first time still.This text takes industrial water glass as to glue the knot, the adoption bakes to burn a technique, carrying a body in the coke fixedly up the rice TiO₂, making the load type rice TiO₂ light catalyst. Makes catalyst with this also, project light upon respectively in the purple and outside light and the sun light under, to acidity the blue(Acid Blue) dyestuff waste water carry on the light catalyst to decline the solution experiment research, the experiment result enunciation, project light upon in the purple and outside light(strength 63 μ W/cm ) under, the catalyst dosage is lg/L,10% H₂O₂ dosage is under the condition with 0.2 ml, 1000ml density is the acidity of the 20mg/L blue dyestuff waste water through the processing with 40min. it takes off the color rate to attain 93%;If change to project light upon with the sun light(light strong 323 μW/cm2), it takes off the color rate to then attain 96%, proving the light catalyst to oxidize a method can decline blue dyestuff waste water of the solution acidity availably,;It inquiried into the catalyst hurl to add the quantity, in addition oxidizing agent quantity and reaction time in the research etc. the factor decline a solution the influence of the reaction to the light catalyst. Each factor that influences the rice TiO₂ light catalyst to oxidize to decline the solution the acidity blue the dyestuff waste the water result's the showing the sequence is: The dyestuff the start density > the oxidizing the agent dosage > the start pH value > the respond time > the catalyst hurl add quantity.It still made an initial experiment a research to the service life of the catalyst in theexperiment, result enunciation: The strength that the purple and outside light project light upon is more big then the usage number of times of the catalyst more many. If press to take off the color rate to compute for 50%, the sun light project light upon the number of times of its usage is 6 times, then is 5 times under the sistuation that the purple and outside light projectlight upon, but having no light to shine on under condition can use only 3 times.Carried on an initial study towards loading a type TiO2,catalysts to decline solution acidity the mechanism of the blue dyestuff waste water finally in the text. The author thinks the load type the TiO2 light catalyst to respond mechanism to is similar to in take the â–  OH regiment as in lie the electricity catalyst of the thing reaction mechanism. While using the wave-length < 388 nm light wave radiation T1O2, T1O2 priceses take of the electronics can be stir up to lead to take up, born electronics-empty cave to, the light generates electricity son and light to living empty cave continuously toward TiC>2 grain sub- surface to move, in TiO2^H2O system, will take place a series reaction in the catalyst surface and H2O and O2, the end creation have strong oxidize an ability of the freedom free radicals(-OH) and oxygen take ion(O2), the -OH can oxidize blue dyestuff of acidity of the hair color regiment, make the waste water take off a color.