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《毕业论文《ZnO粉体制备、烧结和吸附性能研究》》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、ZnO粉体制备.烧结和吸附性能研究中文摘要H前，重金属水污染问题H益严重。寻求无毒和低成本的重金加离子脱除剂对严重的水污染治理尤为重要。众所周知，氧化锌（ZnO）-•种难溶于水的无机无毒物质，已在塑料、涂料和气敏器件等方面得到了广泛的应用。然而，有关ZnO在污水中重金属离子的脱除方面研究和报道较少。木文首先釆用直接沉淀・燉烧法制备出了ZnO粉体；接着，制备出了ZnO烧结体；最后，对比研究了两种形态和结构的ZnO材料对水屮高浓度的CiF+的吸附特性。取得的主耍结论如下：1、多孔性ZnO粉体能快速吸附水中Cu2+O吸附量Freu
2、ndlich模型，即Cu2+在ZnO粉体上的吸附为多层吸附机理。2、ZnO粉体与Cu?+在水屮的相互作用比较复杂，初步认为是水小的Cu2+与ZnO表而的OH发生化学配位作用。这种配位作用时间短，作用力强。3、ZnO烧结陶瓷对水屮Ci严也有很强的吸附作用，但和ZnO粉体相比，其吸附时间长。饱和吸附量与烧结体的致密度关系不人。4、ZnO烧结体对C0的吸附机理离子扩散机制：即C0通过扩散形式从水中进入到ZnO晶格间隙中。而有关这部分内容还有待进一步深入研究。关键词：ZnO粉体；微结构；烧结；吸附FabricationandAbso
3、rptionPropertiesofPowderyandSinteredZnOAbstractRecently,heavymetalpollutionhasbecomeaseriousproblem.Itisparticularlyimportantforcontrolofseriouswaterpollutionthatsearchingfornon-toxicandlowcostofheavymetalionsremovalagent•Aseveryoneknows,zincoxide,awater-insolublei
4、norganicnon-toxicsubstances,hasbeenwidelyusedintheplastics,coatingsandthegassensingdeviceandotheraspects.However,theZnOintheremovalofheavymetalionsinwastewaterresearchandreportedless.However,theresearchesandreportsaboutZnOremovalofheavymetalionsinthewastewater.Firs
5、tly,VspreparedZnObydirectprecipitation-calcinedpowdenThen,preparationofZnOsinteredbody.Finally,comparativestudyoftwokindsofmorphologyandstructureofZnOmaterialsonhighconcentrationsofCu2+adsorptioncharacteristics.Themainconclusionsareasfollows:1、PorousZnOpowdercanra
6、pidadsorptionofCu2+.AdsorptionquantityFreundlichmodel,thatisZnOpowderonCu"adsorptionismultilayeradsorption.2、ZnOpowderisinteractioncomplexwithCu2+inwater,it9spreliminarythinkthatCu2+inwaterproduceschemicalcomplexationwithOH"onsurfaceofZnO.Thecomplexingreactionissho
7、rtandpowerful3、ZnOsinteredceramicshastheverystrongadsorptiononCu2+inwater.but,comparedtoZnOpowder：thetimeofadsorptionislonger.Relationshipbetweensaturatedadsorptionamountandsintereddensityislittle.4、ThemechanismofZnOsinteringbodyadsorbentsCu2+,iondiffusionmechanism
8、:Cu2“removesfromthewaterintoZnOgapsinthegridbydiffusion.However,thispartofthecontentstobefurtherin-depthstudy.Keywords：ZnOpowder,Microstructure,S
