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时间:2020-04-23
《稳定态纳米零价铁-厌氧菌联合处理法降解2,4,6-三氯苯酚-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、化工环保·210·ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY2014年第34卷第3期稳定态纳米零价铁一厌氧菌联合处理法降解2,4,6一三氯苯酚舒亚婕,万金泉,关泽宇,马邕文,(1.华南理工大学环境与能源学院,广东广州510006;2.华南理工大学制浆造纸工程国家重点实验室,广东广州510640)[摘要]利用SEM、XRD、FTIR等手段对稳定态纳米零价铁(NH2一SiO@Nzvi)进行表征,并考察NH一SiO:@NZVI一厌氧菌体系对2,4,6一三氯苯酚(2,4,6-TCP)的降解效果。实验结果表明:NH2一SiO:@NZVI具有较强
2、的抗氧化能力及较好的分散性;当2,4,6-TCP质量浓度50mg/L、NH2一SiO2@NZVI~ilA量1g/L、初始pH7.00、反应120h时,2,4,6-TCP的去除率为34.76%,一级降解速率常数为0.0221,均远大于普通纳米零价铁颗粒;在NH:一SiO@NZVI一厌氧菌体系中,2,4,6-TCP的去除率可达82.70%,NH一SiO@Nzv1与厌氧微生物之间表现出明显的协同效应,能有效缓解2,4,6-TCP对厌氧微生物的抑制作用,稳定体系pH,提高微生物的降解活性和产甲烷活性。[关键词]稳定态纳米零价铁;2,4,6-三氯苯酚;表面修饰;厌氧处理[中图分类号]
3、X78[文献标志码]A[文章编号]1006—1878(2014)03~0210—05Degradationof2,4,6一TrichlorophenolbyCombinationProcesswithStableNano.scaleFeoandAnaerobicBacteriaShuYajie,WanJinquan一,GuanZeyu,MaYongwen!’(1.CollegeofEnvironmentandEnergy,SouthChinaUniversityofTechnology,GuangzhouGuangdong510006,China;2.StateKeyLab
4、oratoryofPulpandPaperEngineering,SouthChinaUniversityofTechnology,GuangzhouGuangdong510640,China)Abstract:Theparticlesofstablenano—scaleFe(NH2-SiO2@NZVI)werecharacterizedbySEM,xRDandFTIR.Thedegradationefectsof2,4,6-trich1orophenol(2,4,6-TCP)intheNH2-SiO2@NZVI—anaerobicbacteriasystemwerestu
5、died.Theexperimentalresultsshowthat:Theanti—oxidationcapabilityanddispersityofNH2-SiO2@NZVIaregood;Whenthemassconcentrationof2,4,6一Trichlorophenolis50mg/L,thedosageofNH2-SiO2@NZVIislg/L,theinitialpHis7.00andthereactiontimeis120h,theremoralrateof2.4.6一trichlorophenolis34.76%,thespeedconstan
6、tforthefirstorderreactionis0.0221,whicharebothmuchlargerthanthoseofnormalnano.scaleFe:Theremovalrateof2,4,6-trichlorophenolintheNH,.SiO,@NZVI.anaerobicbacteriasystemcanreach82.70%,whichndicatesthatthereiSasignificantcoordinationefectbetweenNH2-SiO,NZVIandanaerobicbacteria.Kevwords:stablena
7、no—scalezero.valentiron;2,4,6一Trichlorophenol;surfacemodification;anaerobictreatment近年来,壳核型纳米零价铁(NzVI)颗粒在在原位修复中的使用效果变差。目前表面改性技术磁性、光吸收及生物应用u等方面展现了极大已被成功用于合成更稳定、高效的NZVI,已有报的优异性,成为环境污染修复领域研究的热点,道的表面修饰剂包括羧甲基纤维素、壳聚糖、聚合~[INZVI应用于地下水及土壤中原位修复有机氯代[收稿日期]2013—1l一21;[修订日期
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