简介:摘要:垃圾渗滤液成分复杂,有机污染物浓度极高,一般的生物处理出水很难达标排放。为处理通过NF处理后的垃圾渗滤液浓水,采用铁碳微电解-Fenton氧化处理工艺。本研究表明:PH=2,H2O2的量Q=140mL/h,进水流量为40L/h,持续曝气,COD去除率为55%左右,效果十分显著。
简介:采用混凝-Fentofl氧化法对经生化处理后的垃圾渗滤液进行了深度处理,确定了最佳的试验条件。结果表明,混凝剂聚合硫酸铁(PFS)的最佳投加量为20ml/L。通过正交试验和单因素试验,确定了Fenton反应最佳工艺条件:初始pH值为3,H2O2加入量为3.0mL/L,FeSO4·7H2O加入量为3.5g/L,反应时间为120min。生化处理后的垃圾渗滤液经混凝-Fenton氧化法深度处理后,CODCr由处理前的560mg/L降至处理后的93mg/L,去除率达83.4%,出水水质达到新修订的《生活垃圾填埋场污染控制标准》(GB16889--2008)排放标准。
简介:摘要Fenton法是应用广泛的高级氧化法,本文综述了物化法、生物法与Fenton法联用技术处理垃圾渗滤液的研究进展,并对Fenton法处理垃圾渗滤液的发展进行展望,指出其未来发展方向。
简介:针对实验室废水,采用活性碳联合Fenton试剂氧化处理,探讨主要因素对COD处理效果的影响.实验结果表明,活性碳在添加量为0.45g/mL,反应30min后对废水中COD的去除率达61.32%;Fenton试剂在H2O2添加量为0.07mg/mL,FeSO4·7H2O的添加量为0.02g/mL的条件下反应60min后,对废水中COD的去除率达到59.88%;将活性碳吸附和Fenton试剂联合作用后,活性碳添加量减少了0.05g/mL,FeSO4·7H2O添加量减少了0.005g/mL,去除率可达89.23%,显著提高实验室废水中COD的去除率.
简介:摘要:随着《四川省岷江、沱江流域水污染排放标准》(DB51—2016)的颁布实施,为达到更为严格的地方排放标准,XXX造纸厂在其污水处理系统升级改造过程中,在原有处理工艺的基础上增加芬顿(Fenton)处理工艺,获得了较好的处理效果,实现达标排放。
简介:Fivefluorine-containingvinylethermonomerswerepreparedbythereactionbetween2-vinyloxyethanol,afluorinatedalcoholandhexafluorobenzeneinthepresenceofsodiumhydrideindimethylformamide.Tworepresentativepropertiesofthesemonomers,UV-curingbehaviorinitiatedbyacationicphoto-initiatorPAG201andsurfacefreeenergyofcoatingfilms,wereinvestigated.Photo-polymerizationproceededbothrapidlyandcompletelywithahighdouble-bondconversion(>90%)andafastcuringrate(maximumcuringtime<21s)forthreemonomers.Thesurfaceenergiesofthemonomersandtheresultingpolymerfilmsweretheninvestigated.TheminimumsurfacefreeenergyoftheUV-curedhomopolymerfilmsreaches7.1mJ/m2.X-rayphotoelectronspectroscopydatashowthatthelowsurfacetensionisinfluencedbyfluorinecontentinthesoftsegmentsandfluorinatedchains'migrationtothesurface.Thefivemonomersexhibitlowviscosity,lowsurfaceenergy,goodthermalstabilityandgoodphoto-polymerizationproperties,whichmakethemgreatcandidatesforUVcoatingandphotoresistapplications.
简介:Theexfoliationdegreeofgraphiteoxideintographeneoxideplaysanimportantroleinthemassiveproductionmethodofreducedgrapheneoxide.Itissignificanttofindasimpleandfeasiblemethodtoanalyzetheexfoliationdegreeofgraphiteoxide.Inthepresentwork,graphiteoxidewassynthesizedbyamodifiedHummersmethod,andthengrapheneoxidecolloidswereobtainedbyexfoliationofgraphiteoxidedispersedinde-ionizedwater.UV-visiblespectroscopywasusedtocharacterizetheabsorptionofthegrapheneoxidecolloids,andtheconcentrationofgrapheneoxidecolloidsindicatedbyabsorptionareaofUV-visiblespectrawasstudied.Resultsshowthatthereisarelativelystablerelationshipbetweenthem,indicatingthatUVvisiblespectroscopyisapotentialmethodforanalyzingtheexfoliationdegreeofgraphiteoxideintographeneoxide.
简介:ThecaptureoforthophosphatesandtotalphosphorusfromthePudongCanalriverinthePudongDistrictofShanghaibyTiO2nanoparticlesisstudiedusingarotatingphotoreactorandthenano-TiO2photocatalystDegussaP25.TheeffectsofUVirradiationintensityinarangeof20-74mW/cm2.theloadingoftheTiO2nanoparticlesinarangeof0.05-0.1g/L,irradiationtimeupto4h,andpHvaluesinarangeof2-10.5onthecaptureefficiencyareinvestigated.TheresultsshowthatthecaptureoforthophosphatesandtotalParesignificantlyenhancedbyUVirradiation;ataloadingof0.1g/Landanirradiationintensityabove36mW/cm2,orthophosphatesandtotalphosphorusarerapidlycapturedbyTiO2nanoparticles,causinganobservedreductionfrom0.4mg/Ldownto0.02mg/L.pHvaluesinarangeof2-10.5havelittleeffectonthecaptureefficiencyoforthophosphatesandtotalphosphorus.
简介:TheparametricoptimizationoftheNe-CuBrUVlaserexcitedbylongitudinalpulseddischargeisanalysedbyusingaself-consistentkineticmodel.Consistentcharacteristicsoftheoptimizationprocessareobtainedbycomparingwiththeexperimentalresults.Simulationresultsshowthatneonionscomeintobeingalongwithconsiderabledepletionoftheground-statecopperatoms.Andtheoptimizationofthedischargetubediameteristhetradeoffbetweenthespecificoutputphotondensityandthetotalactivevolume.Boththeoptimalneongaspressureandtheoptimalreservoirtemperatureresultfromthebalancebetweentheneoniondensityandtheground-statecopperatomdensitytoarriveatamaximumoftheirproduct.