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ID:38169773
大小:1.49 MB
页数:5页
时间:2019-06-01
《改性纳米零价铁的制备及其去除水中的四环素》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第5卷第4期环境工程学报Vol.5,No.42011年4月ChineseJournalofEnvironmentalEngineeringApr.2011改性纳米零价铁的制备及其去除水中的四环素1,2,311,3*11,2陈华任晓惠罗汉金董婷婷胡冰洁(1.华南理工大学环境科学与工程学院,广州510006;2.工业聚集区污染控制与生态修复教育部重点实验室,广州510006;3.污染控制与生态修复广东省普通高等学校重点实验室,广州510006)摘要对聚乙烯吡咯烷酮(PVP-K30)改性纳米零价铁(NZVI)用于水中四环素(TC)的去除进行研究。通过XRD,TEM和BET对
2、改性后的纳米铁性能进行表征。探讨不同反应条件对PVP-NZVI去除四环素的影响。实验结果表明,在制备过程中添加PVP-K30改性剂可以明显减小纳米铁颗粒粒径,增大比表面积,提高TC的去除率。当初始TC溶液pH为6.5,PVP-NZVI投加量为0.1g/L,反应240min时,TC的去除率达98.4%,表明PVP-NZVI能有效去除水中的TC。初始pH值为酸性、偏中性的条件下TC的去除效果较碱性条件下好。同时,对反应产物进行了LC-MS分析,发现有3种主要的还原产物产生,推测出其可能的化学结构。并且对PVP-NZVI去除TC的机理进行了初步探讨。关键词纳米零价铁四环素机
3、理LC-ESI-MS中图分类号X703文献标识码A文章编号1673-9108(2011)04-0767-05Preparationofmodifiednanoscalezero-valentironparticlesanditsapplicationinremovaloftetracyclinefromwastewater1,2,311,311,2ChenHuaRenXiaohuiLuoHanjinDongTingtingHuBingjie(1.CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversi
4、tyofTechnology,Guangzhou510006,China;2.TheKeyLabofPollutionControlandEcosystemRestorationinIndustryClustersofMinistryofEducation,Guangzhou510006,China;3.TheKeyLaboratoryofEnvironmentalProtectionandEco-RemediationofGuangdongRegularHigherEducationInstitutions,Guangzhou510006,China)Abstrac
5、tNanoscalezerovalentiron(NZVI)modifiedbypolyvinylpyrrolidone(PVP-K30)wasappliedtoremovetetracycline(TC)fromaqueoussolutions.Thesynthesizedpolyvinylpyrrolidonemodifiednanoscaleze-rovalentiron(PVP-NZVI)wascharacterizedbyXRD,TEMandBET.TheremovalefficiencyofTCbyPVP-NZVIunderdifferentreactio
6、nconditionswereinvestigated.ExperimentalresultsshowedthattheaddingofPVP-K30inpreparationcandecreasetheparticlesize,increasethespecificsurfaceareaandimprovetheeffi-ciencyofremovalobviously.Intheexperiment,PVP-NZVIpossessedgoodremovalefficiencyofTC,theTCre-movalefficiencycouldreach98.4%af
7、ter240minatthedosageaddingof0.1g/LPVP-NZVIatpH6.5.TheconcentrationdecreaseofTCismoreeffectiveinacidicandneutralpH.LC-MSspectraexperimentwasper-formedtodeterminateTCfragmentationpatternintheperspectiveofdegradationproductstudyandfoundoutthreemaindegradationproducts.Inaddition,th
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