光催化氧化处理有机废水胡将军

　　:,,36。,。,20。光催化氧化处理有机废水胡将军　周荣迁　刘慧龙　邓德明(,　430072)　　　,,COD、、。,,120minCOD50%。　　　CODTreatmentoforganicwastewaterbyultravioletphotocatalyticoxidationprocess　　HuJiangjun,ZhouRongqian,LiuHuilongetal.WuhanUniversityofHydraulicandElectricEngineering,Wuhan430072Abstract:Asawastewatertreatmenttechnique,theprinciplesofultravioletphotocatalyticoxidationprocesswaspresented.Thefeasibilityoforganicwastewatertreatment,thechangeregularityofCODwithtimeandtheinfluencesofphotocatalyst,temperatureandconcentrationweretested.Theresultsindicatedthatthisprocesscouldtreatsomeorganicwastewaters,suchasdetergentwastewater,whichweredifficulttobedegraded,andtheCODremovalefficiencycouldreach50%.Keywords:Ultravioletphotocatalyticoxidationprocess　Organicwastewater　COD　　,(TiO2),,,CO2、H2O。,。1　1.1　光催化剂TiO2、ZnO,,-。TiO2+hγ→e-+h+-,,。1.2　光催化反应过程-。TiO2O2,。O2+e-→O-2:H2O2→2OH·H2O2+O-2→OH·+OH-+O2H2O2+e-→OH·+OH-1.3　有机污染物的光催化氧化。,、、,、H2CO2。,:C16H34+H2O+OH·→CO2+H2,,,。,HClCO2。CnHmO2Cly+O2+OH·→CO2+HCl+H2O2　2.1　试验装置1。ZSZ—30W,900mm,19mm,253.7nm,,500mm×200mm×300mm,。2.2　试验方法(、),·31·　DOI:10.15985/j.cnki.1001-3865.2000.01.0131　(TiO2),。,。,YULE88—B。3　3.1　不同有机废水COD浓度的变化,1。1　COD%(min)306090120150180AⅠ27.633.546.249.452.454.0AⅡ29.235.243.046.549.852.3BⅠ25.831.640.748.150.653.7　　COD,2。2　COD▲AⅠ　●BⅠ　×AⅡ　　21,:①COD;②,,,;③,COD50%。3.2　催化剂投加量的影响(COD=708.4mg/L,23℃),,2。2　CODTiO2(g)2461014162040minCOD(%)24.628.433.343.645.748.248.8　　2,,COD,,,COD。3.3　有机物浓度对反应的影响,3。3　COD%(mg/L)(min)306090120675.425.434.744.353.0893.227.636.848.754.6547.322.632.145.250.7433.821.230.239.147.5305.919.428.438.347.8　　3,,,COD。3.4　温度的影响4。4　COD%℃(min)3060901201420.235.846.449.32522.438.748.454.13324.340.248.852.4　　4,COD,。4　(1)。　(2),COD,COD120min50%,。1　、..,1994,20(1):51～552　、..,1993,15(3):80～833　HashimotoKetal.PhotocatalyticReactionsofHydrocarbonsandFossilFuelswithWater.JPhys.Chem.,1984,88,4083～40884　..,1994,2(6):23～295　、..,1995,3(1):55～62(:1998-10-18)·32·　22　1　20002