复合高铁酸盐脱除焦化废水中氨氮的研究张丽霞

0.05mmol/L。,BPR,pH3～9,5.6～7.5,λmax=560。,pH3.2。Fe2+BPR20%～40%,1∶2,50%,。H2O2Fe2+·OH,Fe2+Fe3+,H2O2,1%H2O2,1mL。30min,、Fe2+H2O2,15minEDTA,,。ESRH2O2·OH,DMPO·OH,·OHESR,BPR,,BPR·OH。BPR=C=Oπ-π,,=C=O,·OH=C=O、。:[1]　,.[J].,1992,(6):432-435.[2]　KnightJA.TheProdessandTheoriesofAging[J].AnnChemLabSci,1995,(25):1-12.[3]　,.Fenton[J].,1997,(12):1819-1826.[4]　.[J].,1991,11(6):38-39.[5]　.ESR[M].:.1987.[6]　,,.[J].,1997,7(5):311-313.InvestigationonReactionMechanismofTransitionMetalElementsCatalyzingHydroxylFreeRadicalSUNXue-yun(BeijingReseachInstituteofChemicalEnginneringandMetallurgy,CNNC,Beijing101149,China)Abstract:Indirectdeterminationofthehydroxylfreeradicalindevelopeddyes-transitionmetal-H2O2sys-tembyspectrophotometryisInvestigated.Basedonexperiments,itisdefinedthattriphenylmethanedyesisefficientcolorreagents,TheoptimumconditionsfordeterminationofhydroxylradicalinBPR-Fe2+-H2O2isdefined.ThepossiblereactionmechanismisthatFe2+catalyzesH2O2toproduce·OH,and·OHdestrcturesBPRcolorconjugateconstructionandlettoBPRfadebyoxidizing=C=OinBPR.Keyword:transitionmetal;hydroxylfreeradical;determination郑州大学冉春玲等人研究了复合高铁酸盐对焦化废水中氨氮的去除作用及不同环境因素对氨氮脱除的影响。试验结果表明,当溶液中高铁酸根质量浓度为60.14mg/L,温度为71℃时,焦化废水原始水样中的NH3-N质量浓度可由3493.8mg/L降至1653.9mg/L,氨氮脱除率为56%;对于经生化处理后的氨氮质量浓度为2.706mg/L的焦化废水,当溶液中高铁酸根质量浓度为13.278mg/L时,NH3-N质量浓度可降至0.0345mg/L,N去除率大于98.7%,系统排放水中氨氮指标远低于国家排放标准。[张丽霞摘自《工业水处理》2002,28(6):360-362]·52·　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　20033DOI:10.13355/j.cnki.sfyj.2003.01.016