MWCNTs的不同改性方法对吸附金属离子的影响

IMWCNTs的不同改性法对吸附金属离子的影响摘要近年来，随着社会的工业发展，有毒重金属对环境的污染严重威胁着人类的身体健康，因此，废水处理逐步成为全球性的问题。碳纳米管的特殊结构决定了它特殊的物理化学性质，其性质主要表现为特殊的电学、机械性质和优良的吸附性能。作为一种新型吸附剂，它优异的吸附性能受到人们很大的关注。本论文综合分析整理了MWCNTs的不同改性法对吸附金属离子的影响，同时系统论述了国内外关于金属离子废水处理方法的研究进展，结合多方面因素，运用混酸、浓硝酸两种不同的酸改性方法分别对同一金属离子进行吸附，然后采用单一数实验方法进行实验，再根据正交试验的结果分析，确定吸附的最佳工艺参数，得出结论如下：1、两种不同的酸改性方法相比较，混酸改性MWCNTs对吸附金属离的影响较大，而且吸附率也最高。2、正交试验结果表明，不同因素对Pb2+吸附量的影响也不同，从大到小依次为：吸附剂的投入量，pH，时间，温度，其中吸附剂的投入量影响最为显著。关键词：MWCNTs；重金属；酸改性；吸附IITheInfluenceofDifferentModifiedMethodtoMWCNTsforAdsorptiontheSameKindofMetalAbstractInrecentyears,withthedevelopmentofthesocietyindustrial,TheheavytoxicmetalspollutionoftheenvironmentSeriousthreattothehuman'shealth,Therefore,wastewatertreatmenthasgraduallybecomeaglobalproblem.ThespecialstructureofMWCNTsdecideditspecialphysicalandchemicalproperties,itmainperformanceforspecialelectrical,mechanicalpropertiesandexcellentadsorptionperformance.Asanewtypeofadsorbingmaterial,It'sexcellentadsorptionperformancegetthepeople'slotsofattention.ThispaperComprehensiveanalyzedtheinfluenceofdifferentmodifiedmethodtoMWCNTsforadsorption,Thesamekindofmetal,Andwerediscussedonthemetalionswastewatertreatmentmethodresearchprogressathomeandabroad,combinethevariousfactors,usingmixedacid,Nitricacidtwodifferentacidmodificationmethodstoadsorptionthesamemetalions,Andthenusedasinglenumberexperiment,thenusingtheorthogonalanalysisoftheexperimentresults,todeterminetheoptimumparametersofadsorption,reachaconclusionisasfollows:1、comparedwithTwodifferentmodificationmethodsofacid,mixedacidmodificationofMWCNTshavelargerinfluenceofadsorbingmetalandadsorptionrateisthehighest.2、TheorthogonalexperimentresultsshowthatdifferentfactorsalsohavedifferentinfluencesonthePb2+adsorption,fromlargetosmallasfollows:theAdditionamountofadsorbent,PH,time,temperature,amongwhichtheAdditionamountofadsorbenthasthemostsignificantinfluence.Keywords:MWCNTs;HeavyMetal;AcidModified;Adsorptioni目录引言.....................................................................................................................................1第一章关于国内外废水中金属离子的处理方法.............................................................21.1重金属废水的处理方法和研究现状...........................................................................21.1.1化学沉淀法................................................................................................................21.1.2物理处理法................................................................................................................31.1.3生物处理法................................................................................................................31.2MWCNTs的不同改性方法...........................................................................................41.2.1超声波改性法............................................................................................................41.2.3非共价改性法............................................................................................................51.3金属离子含量的测定方法...........................................................................................51.3.1原子吸收光谱法........................................................................................................51.3.2络合滴定法................................................................................................................51.3.3质谱法........................................................................................................................5第二章实验研究的目的意义及方案设计.........................................................................62.1研究的目的意义...........................................................................................................62.2研究的内容...................................................................................................................62.3研究目标.......................................................................................................................62.4实验仪器与药品...........................................................................................................62.5实验方法及过程...........................................................................................................72.5.3含铅废水的配制........................................................................................................72.5.4浓硝酸改性后的MWCNTs对吸附Pb2+的影响......................................................72.5.5混酸改性后的MWCNTs对吸附Pb2+的影响..........................................................7ii2.5.6单一数实验设计........................................................................................................82.5.7正交实验设计：........................................................................................................82.5.8仪器测定条件............................................................................................................9第三章实验结果与讨论...................................................................................................103.1计算公式.....................................................................................................................103.2标准曲线的绘制...........