焙烧水滑石去除水中硝酸盐的实验研究
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2019-03-24 18:24:41
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焙烧水滑石去除水中硝酸盐的实验研究焙烧水滑石去除水中硝酸盐的实验研究马明海,钱丽萍,曹凤磊,曹殿荣(黄山学院生命与环境科学学院,安徽黄山245041)摘要:利用层状双氢氧化物的结构记忆效应,探讨了焙烧水滑石处理模拟含硝酸盐废水的可行性,考察了pH值、温度、反应时间、振荡速度等因素对硝酸盐去除率的影响。结果表明,当pH为9、反应温度298K、吸附时间120rain、I.DO投加量0.as/100ml时,硝酸盐氮初始浓度为lOOmg/L;震荡速度为150r/min时,总氮的去除率高达96.73%。焙烧水滑石对硝酸盐的吸附符合Freudlich等温方程。关键词:焙烧水滑石;总氮;吸附;富营养化;硝酸盐中图分类号:TQ110.7文献标志码:A文章编号:1005—8141(2010)11—0963—03StudyOilRemovalofNitrateinAqueousSolutionbyCalcinedHydrotaldteMAMing—hal,QIANLi—ping,CAOFeng—lei,CAODian—rong(SchoolofLifeandEnvimmnentScience,Hum~hanUniversity,H~han245041,China)Abstract:Thefeasibilityanalysisofnitrate—containingsimtdatedwastewatertreatingbycalcinedhydrotaleite(HTC),usinglayereddoublehy-droxidesmemoryefectofstructurewasstudied,thepHvalue,temperature,reactiontime,theoscillationspeedandoferfactorsontheLmpactofnitrateremovalratewerealsoinvestigated.Theresultsindicatedthatnitrateremovalratereachedto96.73%whenpH=9,T=298K,t=120min,r(s0lid/liquor)=0.1g/10Oral,pN=100mg/L,andshockspeedwas150r/min.Adsorptionisothermcorrelatedwellwith
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