饮用水源突发性锑+铊复合型污染应急处理研究
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2020-02-27 11:54:53
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第30卷第17期2014年9月中国给水排水CHINAWATER&WASTEWATERVo1.30No.17Sep.2014饮用水源突发性锑+铊复合型污染应急处理研究李丽娟,周勤,靳小虎,蔡展航(1.华南理工大学环境与能源学院工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006;2.广州市番禺水务股份有限公司,广东广州511400)摘要:为应对可能出现的突发性铊+锑复合型污染事件,模拟自来水厂现有工艺对含有锑(Sb)和铊(11)的原水进行处理,分别考察了常规混凝沉淀工艺、KFeO预氧化/混凝沉淀工艺以及分段处理工艺对Tl和sb的去除效果。结果表明,常规工艺对sb和Tl的去除效果均有限;K:FeO预氧化/混凝沉淀工艺对11l的去除效果有明显提高,但对Sb的去除率反而降低;分段处理工艺对sb和11都有明显的去除效果,当第1段聚合氯化铁(PFC)的投加量为10.0mg/L,第2段K2FeO4、聚合氯化铝铁(PAFC)的投加量分别为10、1.5mg/L时,滤后水中剩余Sb、Tl的浓度分别为2.26、0.012g/L,去除率分别达到了83.67%和96.32%。因此,分段处理可作为水厂应对突发性铊+锑复合型污染的有效应急处理措施。关键词:突发性污染;铊;锑;强化混凝;高铁酸钾中图分类号:TU991文献标识码:C文章编号:1000—4602(2014)17—0054—04EmergencyTreatmentofAccidentalAntimonyandThalliumCompoundPollutionatWaterSourceLILi-juan,ZHOUQin,JINXiao—hu,CAIZhan—hang(1.KeyLabofPollutionControlandEcosystemRestorationinIndustryClusters.SchoolofEnvironmentandEnergy,SouthChinaUniversityofTechnology,Guangzhou510006,China;2.PanyuWaterCo.Ltd.,Guangzhou511400,China)Abstract:Torespondtoaccidentalantimonyandthalliumcompoundpollutionincidents,simula—tedwatertreatmentprocesses,conventionalcoagulation—sedimentation,potassiumferratepre—oxidation/coagulation—sedimentationandsegmentationprocess,wereusedtoinvestigatetheirremovaleficienciesofantimonyandthalliumfrompollutedwater.Theresultsshowedthattheremovaleficiencyofantimonyandthalliumbyconventionalcoagulation—sedimentationwaspoor.Potassiumferratepre—oxidation/coagu—lation—sedimentationcouldimprovetheremovalrateofthallium,butreducetheremovalrateofantimony.Segmentationprocesscouldenhanceboththeremovalratesofantimonyandthalliumeffectively.WhenthedosageofPFCinthefirstsectionwas10.0mg/L,andthedosagesofpotassiumferrateandPAFCinthesecondsectionwere1.0mg/Land1.5mg/Lrespectively.theresidualconcentrationsofantimonyandthalliumintheefluentwere2.26g/Land0.012g/L,andtheirremovalrateswere83.67%and96.32%respectively.Therefore,segmentationtreatmentprocesscouldbetheeffectiveemergencyre-sponsetoantimonyandthalliumcompoundpollution.基金项目:广东省科技计划项目(2011B010100013、2012A032300018)·54·李丽娟,等:饮用水源
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