Study On The Degradation Of Reactive Brilliant Blue X-BR Dyestuff Waste Water With Photocatalyst Of TiO₂/EP

In this dissertation, the Reactive brilliant blue X－BR was chosen as researchobject. Experimental research has been operated in degradation of simulative dyestuffwastewater by photocatalysis. In this paper, there were four aspects:(1) Using natural Expanded Perlite(EP) as raw material, adopting acid and/orhexadecyl trimethyl ammonium bromide (CTMAB) to modify the EP which was usedto treat Reactive brilliant blue X－BR simulated dye wastewater. The best conditionsand the optimum modification conditions were explored.(2) Modified Expanded Perlite(EP) was used as the carrier and using sol－gelmethod to prepare TiO2/Expanded Perlite(EP) catalyst. The optimal loaded conditions(loaded times, calcining temperature) and the best processing methods (concentrationof dye wastewater, pH, reaction time, catalyst dosage) were studied.(3) The degradation pathways of the Reactive brilliant blue X－BR dyestuffwastewater by photocatalysis have been studied by using UV, IR and HPLC－MSspectra analysis. The Reactive brilliant blue X－BR dyestuff degradation process wassurmised based on the comprehensive analysis of various spectrum garaphs.(4) Cu doped nanometer TiO2load type catalyst was prepared by loading thecopper nitrate modified nanometer TiO2to the HCEP. The chroma and COD removalrate of Reactive brilliant blue X－BR simulated dyestuff wastewater by utilizingsunlight was studied. The best treatment conditions were as follows: the concentrationof Reactive brilliant blue X－BR simulated wastewater was50mg/L, the dosingquantity was20g/L, the pH was7, the reaction time was2.5h. The chroma and CODremoval rate were92.23%and86.13%under the optimal conditions. The kineticsphotocatalysis showed that the Reactive brilliant blue X－BR degradation processaccords with the first－order dynamics model: C=Cexp(-13.82p0.3953C0-1.1910Q0.7345).It studied the feasibility of using sulfuric acid to modify EP, and compared theadsorption efficiency of sulfuric acid modified EP with cationic surfactant organicmodified EP, the reaction conditions of simulative dyestuff wastewater were studiedby using HCEP, the reaction rules and optimum conditional combinations ofpollutants degradation were known. Secondly, the catalyst which can float on thesurface of the water, no secondary pollution and can use sunlight for the degradationwas built by loading the copper nitrate modified nanometer TiO2to the HCEP, thekinetics and recycling efficiency were studied.