超声波Fenton试剂与絮凝联用进一步处理焦化废水的实验研究魏新利

:,,1956,,,。超声波、Fenton试剂与絮凝联用进一步处理焦化废水的实验研究魏新利张良波马新灵武文杰(,450002)　　　,COD。、Fenton,COD。,COD:Fe2+40mg/L,H2O255mg/L,FeCl35.4mg/L,PAM1.2mg/L,34.19kHz。,COD77.7%;CODFe2+H2O2PAMFeCl3。　　　　FentonAdvancedtreatmentofcokingwastewaterbyultrasoundenhancedFentonoxidationandcoagulationprocess　WeiXinli,ZhangLiangbo,MaXinling,WuWenjie.(ChemicalEngineeringCollegeofZhengzhouUniversity,ZhengzhouHenan450002)Abstract:　Wastewatersfromcoalcokingoperationscontainmanypersistentorganicpollutants;therefore,biotreatedcokingplanteffluentsoftencannotmeettheChineseNationalDischargelimitonCOD.ThepaperpresentseffectivenessofFenton'soxidation,ultrasoundwave,andcoagulation/sedimentationinremovingCODofabiotreatedeffluentaswellasthetreatmentperformanceofanintegratedadvancedtreatmentprocessemployingthethreetreat-mentcomponentseachoperatingatitsoptimumconditions.Thebesttreatmentperformancewasachieved(77.7%CODremoval)bythecombinedtreatmentofoptimizedultrasound(frequencyof34.19kHz)enhancedFentonoxida-tion(40mg/LofFe2+and55mg/LofH2O2),coagulation/sedimentation(5.4mg/LofFeCl3and1.2mg/LofPAM).Thetreatmenteffectivenesswasaffected,indecreasingorderofimpact,byFe2+,H2O2,PAM,ultrasoundfrequency,andFeCl3.Keywords:　UltrasoundwaveCokingplantwastewater　FentonoxidationCoagulation　　、,,。COD,、,,COD。　　Fenton,COD[1],Fenton[2]。,、Fenton,COD,,。1　1.1　样品来源　　,COD182mg/L,pH7.3。1.2　实验装置　　:(),24.55、30.19、34.19kHz3;();pH();COD(COD)。　　1。1　508　　28　7　20067DOI:牨牥牨牭牴牳牭牤jcnki牨牥牥牨牫牳牰牭牪牥牥牰牥牱牥牥牳1　(100mL)H2O2/(mgL-1)Fe2+/(mgL-1)FeCl3/(mgL-1)PAM/(mgL-1)/kHz140163.60.624.55245254.20.824.55350324.81.030.19455405.41.230.19560456.01.434.192　H2O2Fe2+FeCl3PAMCODCOD/%1111111125.630.992122222103.942.91313333374.359.18414444490.450.33515555571.760.60621234575.958.30722345188.551.37823451271.360.82924512380.755.661025123467.862.751131352491.249.891232413589.450.881333524183.853.961434135271.560.711535241372.460.221641425377.357.531742531483.154.341843142577.357.531944253164.464.622045314281.555.222151543293.948.412252154389.950.602353215466.063.742454321575.758.412555432175.958.301/%244.01244.89262.58256.49264.78259.242/%288.90250.10289.79275.56264.29268.073/%275.66295.23274.07290.83285.24283.194/%289.01289.73277.86267.86268.41281.055/%279.46297.09272.97286.53293.95285.72/%45.0052.2027.2133.7429.6626.48,,,,。1.3　试　剂　　,H2O2(30%,),FeSO47H2O(),FeCl3(),PAM(,),(),(),(),()。1.4　实验方法　　(1)100mL,pH3～4[3],Fenton(FeSO47H2OH2O2),,,1h。　　(2)1h,pH,7～8,FeCl3,PAM,。　　(3)COD,,2hCOD。22.1综合影响因素分析　　、Fenton:pH、Fe2+、H2O2、FeCl3、PAM、、。,:,H2O2;pH3～4;30℃,509　、Fenton40℃;1h。　　H2O2、Fe2+、FeCl3、PAM55L25(55),1。2。　　2,Fe2+COD,H2O2,PAM,FeCl3。,Fe2+45mg/L,H2O255mg/L,FeCl34.2mg/L,PAM1.0mg/L,34.19kHz。,。2.2　单影响因素分析2.2.1Fe2+COD　　H2O255mg/L,FeCl34.2mg/L,PAM1.0mg/L,34.19kHz,Fe2+COD2。2　Fe2+COD　　2,Fe2+40mg/L,CODFe2+。H2O2[4]:Fe2++H2O2→Fe3++OH+OH-(1)　　(1),Fe2+H2O2Fe2+Fe3+,,Fe2+Fe3+,Fe3+pH,pH=3,Fe3+Fe(OH)2+[5],Fe(OH)2+Fe2+HO2[6]:Fe3++H2O2→Fe-O2H2++H+(2)Fe-O2H2+→Fe2++HO2(3)　　,Fe2+(1)(3),Fenton,Fenton,/FentonCOD。　　2,Fe2+,COD。Fe2+,(1)OH,,(4):OH+OH→H2O2(4);(2)Fe2+H2O2Fe3+,COD。,Fe3+Fe(OH)3,,。,Fe2+40mg/L。2.2.2　COD　　H2O255mg/L,FeCl34.2mg/L,PAM1.0mg/L,Fe2+45mg/L,COD3。3　COD　　3,COD,。[7],OH,,,,OHHH2O,,。2.2.3FeCl3COD　　H2O255mg/L,PAM1.0mg/L,Fe2+45mg/L,34.19kHz,FeCl3COD4。4　FeCl3COD　　4,FeCl3CODFeCl3。,Fe3+Fe(OH)3,,,,,,,COD。FeCl3,510　　28　7　20067,。FeCl35.4mg/L。2.2.4PAMCOD　　Fe2+45mg/L,H2O255mg/L,FeCl34.2mg/L,34.19kHz,PAMCOD5。5　PAMCOD　　5,PAM,COD。PAM,FeCl3,,,,,[8]。PAM,,PAM,,PAM,,COD,PAM1.2mg/L。2.2.5　H2O2COD　　Fe2+45mg/L,FeCl34.2mg/L,PAM1.0mg/L,34.19kHz,H2O2COD6。6　H2O2COD　　6,H2O2,COD。,(1)OHH2O2;,H2O2Fe2+Fe3+,H2O2OH[9]。,H2O2OH[10-11]:H2O2+OH→H2O+HO2　　HO2,OH,OH,,H2O2OH,H2O2[12]:2HO+H2O2→2H2O+O2Fenton。H2O255mg/L。2.3最佳反应条件　　:Fe2+40mg/L,H2O255mg/L,FeCl35.4mg/L,PAM1.2mg/L,34.19kHz。,COD40.5mg/L,COD77.7%。、Fenton。3　　(1)COD:Fe2+H2O2PAMFeCl3,Fe2+40mg/L,H2O255mg/L,FeCl35.4mg/L,PAM1.2mg/L,34.19kHz。　　(2)COD,Fe2+、H2O2、PAMFeCl3。　　(3)、Fenton,。[1]　,.[J].,1999,17(1):16-19.[2]　,,,.、Fenton[J].,2004,24(2):44.[3]　,,,.Fenton-[J].,2000,25(1):26-28.[4]　,.-Fenton[J].,1994,13(4):303.[5]　.[M].:,1982:79.[6]　LinJG,MaYS.Oxidationof2-chlorophenolinwaterbyul-trasound/Fentonmethod[J].J.Environ.Environ.Eng.,2000,126(2):130-137.[7]　,,,.[J].,2004,18(3):349.[8]　.[M].:,1983:52.[9]　,,,.Fenton[J].,2000,21(3):93-96.[10]　,HuangCP.Fenton[J].,2002,18(3):14-17.[11]　ZhangHui,HuangCP.TreatmentoflandfillleachatebyFentonoxidationprocess[J].Chin.J.Chem.Eng.,2002,10(1):128-131.[12]　SanY,PignatelloJ.Photochemicalreactionsinvolvedinthetotalmineralizationof2,4-DbyFe3+/H2O2/UV[J].Envi-ron.Sci.Technol.,1993,27(2):304-310.责任编辑:陈泽军　(:2005-12-26)511　、Fenton