花生壳对含铬废水的吸附研究文库VIP专享VIP免费

花生壳对含铬废水的吸附研究姓名缪亚丽指导教师王老师摘要采用花生壳、改性花生壳、花生壳活性炭对含铬废水进行了吸附研究，考察了花生壳投加量、吸附时间、pH值、吸附温度等对吸附效果的影响。花生壳改性是采用甲醛/硫酸改性，花生壳活性炭制备是采用氯化锌活化制得花生壳活性炭。采用的测定方法是二苯碳酰分光光度法。实验结果表明：（1）采用未改性花生壳，在最佳吸附条件下，花生壳对Cr6+去除率达到91.90%。（2）采用甲醛/硫酸改性花生壳，在最佳吸附条件下，改性花生壳对Cr6+的去除率达到95.02%。（3）采用氯化锌作为活化剂，在最佳活化条件下制得的花生壳活性炭，在最佳吸附条件下，花生壳活性炭对Cr6+的去除率达到99.90%。综上所述，改性花生壳、花生壳活性炭可作为处理含铬废水的高效吸附材料。关键词：花生壳；改性；花生壳活性炭；吸附；Cr6+AbstractUsedthepeanutshell,themodifiedpeanutshell,thepeanutshellactivatedcharcoalhasconductedtheadsorptionresearchtothechromicwastewater,inspectedthepeanutshelltothrowtheincrement,theadsorptiontime,thepHvalue,theadsorptiontemperatureandsoontoadsorbstheeffecttheinfluence.Thepeanutshellmodificationisusestheformaldehyde/sulfuricacidmodifiedpeanutshell,whenthepeanutshellactivatedcharcoalpreparationusesthezincchlorideactivationsystemtoresultinthepeanutshellactivatedcharcoal.Usesthedeterminationmethodisthebenzoiccarbonylspectrophotometricmethod.Theexperimentalresultindicatedthat,(1)doesnotusethemodifiedpeanutshell,underthebestadsorptioncondition,thepeanutshellachieves91.90%totheCr6+eliminationrate.(2)usestheformaldehyde/sulfuricacidtothepeanutshellmodifiedconditionunder,themodifiedpeanutshellachieves95.02%underthebestadsorptionconditiontotheCr6+eliminationrate.(3)usesthezincchloridetotaketheactivator,thesystemresultsinthepeanutshellunderthebestactivationcondition,whenbestadsorptioncondition,thepeanutshellactivatedcharcoalachieves99.90%totheCr6+eliminationrate.Insummary,theshell,themodifiedpeanutshell,thepeanutshellactivatedcharcoalmaytaketheprocessingchromicwastewaterthehighlyeffectiveadsorptionmaterial.Keywords:Peanutshell;Modification;Peanutshellactivatedcharcoal;Adsorption;Cr6+目录第一章前言...............................................11.1研究的背景及意义..................................11.2研究现状与分析.....................................21.3研究目的和内容....................................31.3.1研究目的.....................................31.3.2研究内容.....................................31.4研究的技术路线....................................4第二章花生壳吸附六价铬的实验方法与材料..................52.1实验材料...........................................52.1.1实验试剂.....................................52.1.2实验仪器.....................................52.1.3实验试剂的配制...............................52.2实验方法..........................................62.2.1花生壳预处理.................................62.2.2花生壳改性方法...............................62.2.3花生壳活化方法...............................72.3六价铬的测定方法..................................72.4标准曲线的绘制....................................8第三章花生壳对Cr6+最佳吸附条件的探讨.....................93.1概述..............................................93.2花生壳目数对花生壳吸附Cr6+性能的影响...............93.3投加量对花生壳吸附Cr6+性能的影响..................103.4吸附时间对花生壳吸附Cr6+性能的影响................113.5溶液pH对花生壳吸附Cr6+性能的影响.................113.6吸附温度对花生壳吸附Cr6+性能的影响..........