H_2O_2_UV流化床氧化焦化废水尾水中惰性成分的可行性考察_夏芳
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2020-02-21 21:09:30
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2011年第30卷第5期CHEMICALINDUSTRYANDENGINEERINGPROGRESS·1135·化工进展H2O2/UV流化床氧化焦化废水尾水中惰性成分的可行性考察夏芳,韦朝海,吴超飞,胡芸,罗汉金(华南理工大学环境科学与工程学院,工业聚集区污染控制与生态修复教育部重点实验室,污染控制与生态修复广东省高等学校重点实验室,广东广州510006)摘要:焦化废水尾水中残留的多种惰性成分仍然构成环境风险,制约了其安全排放或安全回用,有必要研究可行的深度处理技术。本文以实际废水作为研究对象,采用自行研制的H2O2/UV流化床反应器,考察在不同的H2O2投加量、pH值、曝气量及光照条件下对COD去除与UV254转化的影响。以TOC为指标评价其矿化程度,并通过UV扫描、HPLC、GC/MS、IC等方法分析惰性成分的氧化效果。结果表明:当初始H2O2与COD的摩尔比值约为0.22、微酸性与适当曝气、实现光反射时能够得到高效的污染物转化效率,COD和TOC的浓度可分别下降到20mg/L和10mg/L左右,降解过程中,长链烷烃、含氮杂环化合物、苯系物及多环芳烃等组分被有效转化并矿化,部分转化为小分子中间产物如乙酸等,废水毒性大为降低,可以作为回用的水源。关键词:环境工程;焦化废水尾水;H2O2/UV;流化床;惰性成分;氧化中图分类号:X784文献标志码:A文章编号:1000–6613(2011)05–1135–07FeasibilityofoxidationofinertingredientsincokingwastewatertailracebyH2O2/UVfluidizedbedXIAFang,WEIChaohai,WUChaofei,HUYun,LUOHanjin(SchoolofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,KeyLabofPollutionControlandEcosystemRestorationinIndustryClusters,MinistryofEducation,KeyLaboratoryofPollutionControlandEcologicalRestoration,HigherEducationinGuangdongProvince,Guangzhou510006,Guangdong,China)Abstract:Thetailraceofcokingwastewaterstillhaveavarietyofinertingredients,whichisanenvironmentalriskandfurtherlimitsitsdischargeorreusesafety,soitisnecessarytostudythefeasibilityofanadvancedin-depthtreatmenttechnology.TheactualwastewaterwastreatedwithadesignedH2O2/UVfluidizedbedreactor,andCODremovalandUV254conversionwereinvestigatedunderdifferentdosagesofH2O2,pH,aerationandlightconditions,withTOCasanindicatortoevaluatethedegreeofmineralization,andtheoxidationofinertingredientswasanalyzedbyUVscanning,HPLC,GC/MS,IC.TheresultsshowedthatundertheconditionsthattheinitialmolarratioofH2O2totheCODwasabout0.22,withslightlyacidicandproperaeration,andhighlightreflectioneffectiveconversionofpollutantscouldbeachieved,CODandTOCconcentrationcouldbedecreasedtoabout20mg/Land10mg/Lrespectively.Duringtheprocess,thelong-chainhydrocarbons,nitrogen-containingheterocycliccompounds,benzeneandpolycyclicaromatichydrocarbonsandothercomponentswereeffectivelytransformedandmineralized,
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