腐殖酸对高铁酸钾预氧化除藻效果的影响

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马 军, 刘 伟, 盛 力, 李圭白(哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090)   : 利用人工培养的绿藻进行了高铁酸钾预氧化除藻的静态试验,并与单纯硫酸铝混凝除藻效果进行了对比。结果表明,腐殖酸的存在使单纯硫酸铝除藻效率降低,高铁酸钾预氧化可以大幅度降低腐殖酸对混凝除藻的影响,这也是高铁酸钾具有良好除藻作用的主要原因之一。为达到同样的除藻效果,预投高铁酸钾可以节省混凝剂用量。另外,适当地降低pH值、延长预氧化时间将大大提高高铁酸钾预氧化除藻效率。  : 除藻; 预氧化; 腐殖酸; pH; 高铁酸钾; 混凝:TU991.25  :A  :1000-4602(2000)09-0005-04EffectofHumicAcidonAlgaeRemovalbyPre-OxidationwithPotassiumFerrate(Ⅵ)MAJun, LIUWei, SHENGLi, LIGui-bai(SchoolofMunic.andEnviron.Eng.,HarbinInstituteofTech.,Harbin150090,China)  Abstract: Jartestofpre-oxidationwithpotassiumferrate(Ⅵ)uponalgaeremovalwerecon-ductedusinglaboratoryculturedgreen-algae.Acomparisonoftheeffectivenessofalgaeremovalwasal-somadebetweenpre-oxidationwithpotassiumferrate(Ⅵ)andcoagulation-sedimentationwithalu-minumsulphatealone.Resultsshowedthathumicacidinthewatercausedthereductionofalgaere-movalefficiencycoagulatedwithaluminumsulphatealone.Pre-oxidationwithpotassiumferrate(Ⅵ)couldreducesignificantlytheinfluenceofhumicacidonalgaeremovalbycoagulation,whichwasoneofprimaryreasonfortheexcellenteffectivenessonalgaeremovalbypotassiumferrate(Ⅵ).Toachievecertainalgaeremoval,pretreatmentwithpotassiumferrate(Ⅵ)couldreducethedosageofaluminumsulphate.Inaddition,undertheconditionoflowpHvalueandaprolongpre-oxidationtime,algaere-movalefficiencyofpre-oxidationwithpotassiumferrate(Ⅵ)wasfurtherenhanced.  Keywords: algaeremoval; pre-oxidation; humicacid; pH; potassiumferrate(Ⅵ); co-agulation  :(59825106)1 试验方法,。280L,12h,,,15~18℃,pH7.3,[1]。25d,(3.5~4.2)×108/L,pH9.1,20~40NTU。,(Chlorococoum)、(Scenedesmus)。·5·   2000Vol.16          CHINAWATER&WASTEWATER          No.9,,,50℃12h,0.45μm,,,。pH。DBJ—621,5500mL,。,200r/min,[Al2(SO4)3·18H2O],1min,40r/min10min,20min1cm。2 试验结果与讨论1。1 1,,3.4mg/L(DOC)、,(2)。2 ,,,,。,,;,,。3。3 3,,,,,(3a)。,。·6·2000Vol.16                              No.99.2mg/L(Al2O3),(66%)12.3mg/L(Al2O3)(70%)。,。4(DOC=0.56~5.6mg/L),。4 ,、,9.2mg/L(Al2O3),(DOC0.56mg/L),,;(0.28、0.85mg/L),1.4mg/L(Fe),,。,(4b、c)。,,。:①,,;②。,,。,,pH。,[(0.007~4.2)×108/L],pH7.39.1。pH(5)。5 pH5,pH,pH,pH7.05pH9.112%;,pH(6)。,,pH,;,。pH7.1、7.7mg/L(Al2O3)pH9.1、12.3mg/L(Al2O3)。,,pH。·7·2000Vol.16                              No.9pH:①pH,(2.2V,0.7V),;②ξpH7~8,;③pH5,pH。6 pH7。,,。pH,。,,pH(7c)。,,,,。7 pH3 结论,。,。,。,pH,pH、。:[1] .[M].:,1986.[2] ,,,.[J].,1998,14(5):9-11.:(1962- ), , , , , , :。:(0451)6282292(H)E-mail:majun@mail.hrbucea.edu.cn:2000-05-09·8·2000Vol.16                              No.9

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