基于硫酸根自由基的高级氧化技术深度处理造纸废水的研究
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2020-04-07 20:57:13
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研究论文作者简介:郭鑫女士,在读硕士研究生;主要研究方向:造纸废水处理。基于硫酸根自由基的高级氧化技术深度处理造纸废水的研究郭鑫马邕文万金泉王艳黄明智(1.华南理工大学轻工与食品学院,广东广州,510640;2.华南理工大学环境科学与工程学院,广东广州,510006)摘要:采用零价铁(ZVI)活化过硫酸钠(Ps)产生硫酸根自由基的高级氧化技术处理造纸废水二级出水(CODc为160mg/L,色度为200度),考察了常温下pH值、ZVI用量、Ps用量等因素对COD降解率及色度去除率的影响,并对其降解过程动力学进行了探讨,初步确定了硫酸根自由基氧化降解造纸废水的工艺条件,通过采用GC-MS检测分析了废水处理前后的物质变化情况。结果表明,在酸性至中性条件下,硫酸根自由基皆可有效降解有机污染物;在ZVI用量为8g/L、PS用量为4g/L时,室温条件下反应3h后,初始pH值为3和未调节pH值废水的COD降解率分别达到57.5%和34.2%,色度去除率分别达到83%和89%;通过GC—MS检测分析可知二级出水中含35种有机污染物,经过硫酸根自由基氧化降解后废水中苯类物质得到了一定的降解,相对含量有一定的变化,但种类基本没变。关键词:高级氧化;造纸废水;深度处理;硫酸根自由基;ZVI活化中图分类号:X793文献标识码:A文章编号:0254—508x(2012)09-0032.06AdvancedTreatmentofPapermakingWastewaterbySulfateRadical-basedAdvancedOxidationProcessGUOXinMAYong—wen,一WANJin-quan,WANGYanHUANGMing.zhi(1.ColledgeofLightIndustryandFoodScience,SouthChinaUniversityofTechnology,Guangzhou,GuangdongProvince,510640;2.ColledgeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou,GuangdongProvince,510006)(E—mail:ppywma@scut.edu.cn)Abstract:Typically,pulpingandpapermakingwastewatercontainshighlevelsofnon—biodegradableorganics,andthistypeoforganicsstillexistaftersecondarytreatment.Thispaperreportsthefirstscientificstudytoapplysulfateradical(so,-·)-basedadvancedoxidationprocess(SR—AOP)totreatpapermakingwastewater,withanemphasisofremovalofCODandcolorofrefractoryorganics.Usingzero·valentiron(ZVI)activatedpersulfate(PS)fortheoxidationofthewastewateraftersecondarytreatment(CODcof160mg/L,colorof200de—grees)wasstudiedthroughaseriesofbatchexperiments.TheeffectofpHonthedegradationefficiencyofwastewaterwasinvestigatedontheconditionofroomtemperature,alsotheeffectsofZVIdosageandPSdosagewereexamined.Theresultsshowedthat,theefficieneiesofCODcdegradationorcolorremovalareabout57.5%and83%atconditionofpH=3within3h,orabout34.2%and89%atconditionofpH=8.14with3hwhentheZVIdosagewas8g/LandPSdosagewas4g/Lrespectively.Thesecondarytreatmentwastewaterandthead—vancedtreatmentwastewaterwithSR—AOPwerequalitativeanalyzedandquantitativedeterminedusingGC·MSanalyzer,the
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