改性累托石在石化废水处理中的应用研究

:20040829:20042004AA301C77.:(1955-),,,,,343Vol.34No.320055JournalofChinaUniversityofMining&TechnologyMay2005:1000-1964(2005)03-0374-04曾德芳,李　娟,范　林,袁继祖(,430070):用天然累托石、改性累托石及其复合絮凝剂来处理石化废水,试验结果表明:三者处理效果依次增强,其中以改性累托石复合絮凝剂处理效果最佳,CODCr去除率为76.8%,SS去除率为94.2%,与未改性的累托石相比,CODCr去除率提高了45.6%,SS的去除率提高了41%,均达到国家二级排放标准,且处理石化废水的药剂成本仅为0.4$/t,远低于我国目前平均2.8$/t的石化废水处理成本,在我国石化行业具有重要推广应用价值.此外,还探讨了改性累托石的制备及污水处理机理.:累托石;改性;石化废水;水处理:X703;O647.33:AApplicationofModifiedRectoriteinPetrochemicalWastewaterTreatmentZENGDe-fang,LIJuan,FANLin,YUANJi-zu(SchoolofResourceandEnvironmentalEngineering,WuhanUniversityofTechnology,Wuhan,Hubei430070,China)Abstract:Experimentofusingnaturalrectorite,modifiedrectoriteanditscompositeflocculanttotreatpetrochemicalwastewaterwasperformed.Theresultshowsthattheeffectoftreatmentisimprovedintheorderofnaturalrectorite,modifiedrectorite,anditscompositeflocculant,ofwhichtheefficiencyofeliminatingCODbythemodifiedrectoritecompositeflocculantreaches76.8%,andthatofeliminatingSSreaches94.2%,45.6%and41%higherthanthosebynaturalrectorite,respectively.Thisresultcanmeetthestatestandardsforwastewaterdischargecontrol.Thecostofthismodifiedrectoritecompositeflocculantintreatingpetrochemicalwastewaterisonly0.4$/t,whichisfarlowerthanthecurrentcost(about2.2$/t).Sothisflocculantisofvitalsignificanceinthepetrochemicalindustry.Inaddition,thispaperhasalsodiscussedthepreparationofthismodifiedrectoriteandthemechanismofeliminatingCODandSS.Keywords:rectorite;modification;petrochemicalwastewater;watertreatment,[1-5].,,,,.,CODCr(,)45.6%,SS(,)41%,[6],0.4/t(,),2.8/t,.11.1QM500;SZ-1;1000W;2410;24250mL;ZK500;0.45m60mmCN-CA;;MP-10,;50mL;pHS-2C,BA210.(70%,70m,260m2/g,2.77g/cm3,);(POX,,);();();();();();();1,10-();();();().1.2,CODCr400mg/L,SS180mg/L,pH78.1.3,;,;POX,.3[7],CODCrSS,3SSCODCr,.1.41),3h,24h.1%2%,NaOH1%AlCl32%=1100,703h24h.11005h,.2)(POX)120,10%,0.5h.3)(1)1Fig.1Flowchartoftreatingpetrochemicalwastewaterusingthisflocculant4),10%,3500mL(),50r/min65min,20min,CODCrSS[7],CODCrSS3.22.11)(1).1Table1TheresultsoftreatingpetrochemicalwastewaterusingnaturalrectoriteB/(mgL-1)CODCrSS/%CODCrSS150307.299.9023.244.5280294.490.7226.449.63120275.284.2431.253.24140281.688.0229.651.15160288.892.7027.848.51,,3#,120mg/L,CODCrSS,31.2%53.2%.2)(2)3753:2Table2TheresultsoftreatingpetrochemicalwastewaterusingmodifiedrectoriteB/(mgL-1)CODCrSS/%CODCrSS130195.223.7651.286.8245186.418.7253.489.6360179.614.2255.192.1475174.012.2456.593.2590192.817.1051.890.52,,4#,75mg/L,CODCrSS,56.5%93.2%,,.3)(3)3Table3TheresultsoftreatingpetrochemicalwastewaterusingmodifiedrectoritecompositeflocculantB/(mgL-1)POXCODCrSS/%CODCrSS1551.0115.620.8871.188.42801.1102.818.7274.389.631051.295.214.2276.292.14801.692.810.4476.894.251051.895.211.776.293.56852.499.613.8675.192.33,,CODCrSS,76.8%94.2%,CODCrSS.(CODCr120mg/L)(SS70mg/L)[6],:80mg/L,POX1.6mg/L.2.234.43Table4Thecomparisonofeconomicandtechnicalindexesofthreekindsofflocculant/(mgL-1)/%CODCrSS/(t-1)12031.253.20.0847556.593.20.225(POX)801.676.894.20.40:-420045.4,3,CODCrSS45.6%41%;,0.40/t2.8/t,[6]..2.3,3:,.,(Na,Ca,K)2(Al4)[Si6Al2]8O20(OH)4(E0.66)(Al,Mg)4[Si,Al]8O20(OH)nH2O,2.47nm(2),4(),2()2ImIs.,(Is)(Ca2+Na+K+),,,[8].,[9],,-1.,[10],(Is),,[11],Is,.,-1-2.[12],,///..37634,,,,[13],34.3CODCrSS,,,:80mg/L,POX1.6mg/L,CODCrSS76.8%94.2%,CODCrSS45.6%41%,0.4/t,2.8/t,.,.:[1],,,.[J].,2001,20(4):555-558.SunJS,ZhangZQ,liuY,etal.Studyonthetreatmentofchromium_containingwastewaterwithrectorite[J].JournalofRockyMineralogy,2001,20(4):555-558.[2],,.[J].,2004,27(3):40-43.SunJS,ShiTX,ZhangLJ.Studyonthetreatmentofpharmacywastewaterwithrectorite[J].JournalofNon-MetallicMines,2004,27(3):40-43.[3],,,.[J].,2004,26(1):15-18.SunJS,ZhangZQ,ZhangLJ,etal.Studyonthewastewatertreatmentwithrectorite[J].JournalofWuhanInstituteofChemicalTechnology,2004,26(1):15-18.[4]Besra,L,Sengupta,DK,Roy,SK,etal.Influenceofpolymeradsorptionandconformationonflocculationanddewateringofkaolinsuspension[J].SepPurifTechnol,2004,37(3):231-246.[5]Pierce,RH,Henry,MS,Higham,CJ,etal.Rem-ovalofharmfulalgalcellsandtoxinsfromseawaterculturebyclayflocculation[J].HARMFULALGAE,2004,3(2):141-148.[6]GB8978-1996,[S].[7]GB-11901-89,GB11914-89,()[S].[8],,.[J].,1997,16(1):1-13.WangXR,WuSN,LiWS.Studydevelopmentofrestoringcontaminatedenvironmentwithorganicclayeymineral[J].JournalofEnvironmentalChemistry,1997,16(1):1-13.[9],,.[J].,2003,23(2):37-39.ZhaoXR,DuDY,LuXH.Testingstudyontreatingwastewaterofammoniaandnitrogenwithrectorite[J].JournalofIndustrialWaterTreatment,2003,23(2):37-39.[10],,.[J].,1997,16:29-30.BaoSC,SunJS,LiuY.Apreliminarystudyonadsorbingmechanismofmodifiedclayeymineral[J].BulletinofMineralogy,PetrologyandGeochemistry,1997,16:29-30.[11],,.(VI)[J].,2003,25(12):26-29.SunJS,ZhangZQ,ZhangLJ.Studyonapplicationofrectoriteinwastewatertreatment(VI)-thetreatmentofmolasseswastewater[J].JournalofWuhanInstituteofChemicalTechnology,2003,25(12):26-29.[12].[M].:,2000.[13],.[J].,2003(3):29-30.ZhengDK,XuCL.Applicationofflocculantintreatingwastewaterofpapermaking[J].JournalofHeiLongjiangPaperMaking,2003(3):29-30.()3773: