UVFenton法降解金属切削液废水及数学模型的建立

UV-Fenton周乃磊,王中琪,徐旭东(西南科技大学四川省环境工程自控技术重点实验室,四川绵阳621010):UV/Fenton,pH=2.5H2O2(30%)=127.5mL/LFe2+=24.8mmoL/L=2h6,COD94.4%;1stOpt,UV/FentonCOD,,UV/Fenton:;UV/Fenton;COD;:X703.1,O141.4:A:1671-1556(2010)01-0026-05*DegradationoftheMetalworkingFluidsbyUV/FentonandtheEstablishmntofItsMathematicModelZHOUNa-ilei,WANGZhong-qi,XUXu-dong(SouthwestUniversityofScienceandTechnology,KeyLaboratoryofSichuanProvinceAutoControlTechnologyofEnvironmentalEngineering,Mianyang621010,China)Abstract:Thispapermainlyintroducesthetreatmentofthemetalworkingfluids(MWFs)wastewaterbyUV/Fenton.Theorthogonalexperimentandsingle-factorexperimentobtainedtheoptimalconditions:pH=2.5,Fe2+addingcapacity=24.8mmol/L,H2O2(concentrationof30%)addingcapacity=127.5ml/L,andaddingtimes=6.Duringthetotalreactiontimeofthreehours,theCODremovalratereached95%.Finally,usingthe1stOptsoftwaretomakemultiplenon-linearfittingcouldestablishthemathematicmod-elequationoftheCODremovalrateofMWFsbyUV/Fenton,withtheresultsinaccordancewiththoseoftheorthogonalexperiment.Keywords:metalworkingfluidswastewater;UV/Fenton;CODremovalrate;mathematicmodel0[1],,,,,,,,,[2],[3,4],UV/Fenton,,UV/Fenton11.117120101安全与环境工程SafetyandEnvironmentalEngineeringVol.17No.1Jan.2010*:2009-09-02:2009-10-28:([2006]337,:NO.3);:(1985)),,,E-mail:[e-mail],,1SGY-ÑUV/Fenton1(mg/L)Table1MainwaterqualityguidelineofMWFsCODBOD2500040007002.510030203.01.2UVFenton,:UV/Fenton,pHH2O2Fe2+5;,;,1stOpt,COD,22.1UV/Fenton2.1.1理论投加量的确定H2O2Fe2+:COD1000mg/L,1000mg/L,2molH2O2lmolO2,H2O22/32=0.0625mol/L,2125mg/L(H2O2COD2.125),30%H2O2,1.1g/mL,H2O2(Qth)6.38mL;COD,H2O2,H2O2,COD4000mg/L,H2O2=6.38@4=25.5ml/L;Fe2+BH2O21B20,Fe2+12.4mmol/L2.1.2正交试验UV/Fenton,pHH2O2Fe2+554[5,6],2,H2O2/,/32Table2FactorsandlevelsintheorthogonalexperimentpHH2O2/Fe2+///h12.50.5(12.75ml/L)0.5(6.2mmol/L)2123.51(25.5ml/L)1(12.4mmol/L)4234.53(76.5ml/L)2(24.8mmol/L)6345.55(127.5ml/L)3(37.2mmol/L)843UV/FentonL16(45)Table3L16(45)orthogonalanalyticaltableaboutthetreatmentofMWFsbyUV/FentonpHH2O2/F2+///hCOD/%12.50.56.22122.322.5112.44255.232.5324.86394.442.5537.28491.853.50.512.48311.363.516.26414.773.5337.24173.883.5524.82276.594.50.524.84410.8104.5137.2239.0114.536.28232.2124.5512.46148.7135.50.537.2628.0145.5124.88110.3155.5312.42417.3165.556.24323.0K165.913.123.031.338.8K244.122.333.140.743.0K325.254.448.041.434.4K414.660.045.736.433.7RR1=65.9R2=60.0R3=48.0R4=41.4R5=43.03:R1R2R3R5R4,,UV/Fenton:pHH2O2Fe2+,COD94.4%,Ki:pH=2.5,H2O2=127.5ml/L,Fe2+=24.8mmoL/L,=2h,=62.2UV/Fenton,COD,COD,,COD27第1期周乃磊等:UV-Fenton法降解金属切削液废水及数学模型的建立COD4000mg/L,pH=2.5,H2O2=127.5mL/L,Fe2+=24.8mmol/L,=2h,=6,,,4,COD1554Table4Varietyofeachsingle-factorpHH2O2/Fe2+/(mmol#L-1)//min11.50.56.213022.5112.426033.5218.649044.5324.8612055.5531.0815067.0737.2101807210824092702.3UV/Fenton2.3.1模型假设,,28安全与环境工程第17卷5CODTable5Mathematicmodelequationoftherelationbetweeneachsingle-factorandCODremova-lrateCODCODpHY=39.056+47.934X-12.904X2+0.826X3R2=0.9810CODH2O2Y=-15.921+107.983X-39.116X2+6.050X3-0.343X4R2=0.9898CODFe2+Y=25.333+11.161X-0.5588X2+0.0067X3R2=0.9922CODY=44.915+12.162X-0.7897X2R2=0.9372CODY=-5.515+0.895X-0.00196X2R2=0.9888:(1)UV/Fenton(2)H2O2,(3),,(4),2.3.2建立金属切削液废水降解数学模型pHH2O2Fe2+(min)5,,1stOptUV/FentonCOD,,:G=F(x1,x2,x3,x4,x5)=p1f1(x1)p2f2(x2)p3f3(x3)p4f4(x4)p5f5(x5)p6f1(x1)=39.056+47.934x1-12.904x21+0.826x31f2(x2)=-15.921+107.983x2-39.116x22+6.050x32-0.343x42f3(x3)=25.333+11.161x3-0.5588x23+0.0067x32f4(x4)=44.915+12.162x4-0.7897x24f5(x5)=-5.515+0.895x5-0.00196x25:GCOD(%);x1pH;x2H2O2();x3Fe2+(mmol/L);x4();x5(min)1stOptp1p2p3p4p5p6:Parametersp(1:6);Variablex1,x2,x3,x4,x5,y1[Output];StartProgram;vari:integer;beginfori:=0toDataLength-1dobeginy1[i]:=p1*((39.056+47.934*x1[i]-12.904*x1[i]^2+0.826*x1[i]^3)^p2)*((107.983*x2[i]-39.116*x2[i]^2+6.050*x2[i]^3-0.343*x2[i]^4-15.921)^p3)*((25.333+11.161*x3[i]-0.5588*x3[i]^2+0.067*x3[i]^3)^p4)*((0.895*x4[i]-0.00196*x4[i]^2-5.515)^p5)*((44.915+12.162*x5[i]-0.7897*x5[i]^2)^p6);end;end;EndProgram;Data()p1=2.77149@10-7;p2=2.956889;p3=1.653348;p4=0.013873;p5=1.294636@10-10;p6=-0.2812244R2=0.93109036,(DC)=0.9296315912UV/FentonG=F(x1,x2,x3,x4,x5)=2.77149@10-7f1(x1)2.956889f2(x2)1.653348f3(x3)0.013873f4(x4)1.294636@10-10f5(x5)-0.28122442.3.3模型分析R20.9311,UV/FentonCOD;,p2p3p4p6p5,5UV/FentonCODpH,H2O2(H2O2)Fe2+,,,,UV/Fenton6629第1期周乃磊等:UV-Fenton法降解金属切削液废水及数学模型的建立:(1~8),pH,,pH[4COD6Fig.6FittingcurveofthemathematicmodelequationonthedegradationofMWFs3(1)UV/Fenton,pH=2.5H2O2=127.5mL/LFe2+=24.8mmol/L=2h=6,COD94.4%,COD,COD,[7](2),UV/Fenton,,,:[1]Cheng,C.,D.Phipps,R.M.Alkhaddar.Treatmentofspentmet-alworkingfluids[J].WaterResearch,2005,39(17):4051-4063.[2]Portela,J.R.,J.Sanchez-Oneto,E.Nebot,etal.Hydrothermaloxidationofoilywastes:Analternativetoconventionaltreat-mentmethods[J].ChemicalEngineeringandTechnology,2003,26(2):85-89.[3],.UV-Fenton[J].,2008,24(13):58-61.[4],,,.Photo-Fenton[J].,2000,18(4):357-365.[5],.[J].,1995,(1):52-55.[6],.[M].:,2001:35-55.[7]Hilal,N.,G.Busca,F.Rozada,etal.Useofactivatedcarbontopolisheffluentfrommetalworkingtreatmentplant:Comparisonofdifferen