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时间:2017-12-07
《超声灭活饮用水中隐孢子虫研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中国环境科学2014,34(2):431~436ChinaEnvironmentalScience超声灭活饮用水中隐孢子虫研究胡健龙,冉治霖,v,李绍峰,张朝升(1广州大学土木工程学院,广东广州510006;2.深圳信息职业技术学院交通与环境学院,广东深圳518172;3.深圳职业技术学院,深圳市工业节水及城市污水资源化技术重点实验室,广东深圳518055摘要:为研究超声对饮用水中隐孢子虫(Cryptosporidiumparvum)的灭活情况,考察了超声频率、功率、pH值和温度对灭活率的影响,通过形态学观察初步探讨了超声灭活隐孢子虫的机制,并进行了灭活动力学分
2、析.结果表明,低频有利于隐孢子虫灭活,19.8kHz,pH7.2,温度(20a:1)*C条件下超声15min灭活率可达92.5%,频率升高灭活率反而下降.在本实验条件下,超声功率103W对隐孢子虫的灭活效果与151W的相近,pH值对超声灭活隐孢子虫的影响不大,36~C超声灭活15min灭活率为95.6%,而在9~C下超声15min灭活率为88.3%,水温升高有利于灭活.灭活前后的形态学变化表明超声空化作用导致细胞膜破坏,细胞质流出从而起到灭活孢囊的效果.超声灭活隐孢子虫遵循假一级反应动力学,灭活隐孢子虫以低频率高功率的效果最好,可认为隐孢子虫的灭活以超声空化的强
3、度为主.关键词:隐孢子虫:超声:饮用水:灭活中图分类号:X703.1文献标识码:A文章编号:1000—6923(2014)02—043卜06InactivationofCryptosporidiumparvumindrinkingwaterbyultrasonicirradiation.HUJian—long,RANZhi-lin’,LIShao-feng,ZHANGChao-sheng(1.SchoolofCivilEngineering,GuangzhouUniversity,Guangzhou510006,China~2.DepartmentofTrans
4、portationandEnvironment.ShenzhenInstituteofInformationTechnology,Shenzhen518172China;3.ShenzhenKeyLaboratoryofIndustrialWaterSavingandMunicipalSewageReclamationTechnology,ShenzhenPolytechnicInstitute,Shenzhen518055,China).ChinaEnvironmentalScience,2014,34(2):431-436Abstract:Ultrasoni
5、coninactivationofCryptosporidiumparvumwasstudiedunderdiferentoperationalparameters,suchasultrasonicfequenc~ultrasonicpower,pHandtemperature.ThemechanismofinactivationofCryptosporidiumparvumwaspreliminarydiscussedbymorphologicalobservation,andinactivatingkineticanalysiswasalsofocused.
6、TheresultsindicatedthatlowfrequencyfavoredtheinactivationofCryptosporidiumparvum.92.5%ofinactivatingratecouldbeachievedundertheconditionof19.8kHzultrasonic(15min),pH7.2andtemperature20~1℃,whiletheinactivatingratedecreasedifthefrequencyincreased.Furthermore,theinactivatingrateswerealm
7、ostthesameregardlessofultrasonicpowerwas103Wor15lW,andthevalueofpHhadslightefectoninactivating.Theinactivatingratewas95.6%usingultrasonictreatmentfor15minat36℃while88_3%at90C.whichindicatedhighertemperaturewasconducivetotheinactivationofCryptosporidiumparvum.Ultrasoniccavitationcause
8、dcellmembran
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