LDHs及其纳米复合材料对水中SCN-和酸性大红GR的吸附性能研究.docx

LDHs及其纳米复合材料对水中SCN-和酸性大红GR的吸附性能研究
摘要
本文通过研究LDHs及其纳米复合材料对水中SCN-和酸性大红GR的吸附性能，探讨了LDHs及其纳米复合材料在水资源净化中的应用潜力。结果表明，LDHs及其纳米复合材料能够有效去除水中SCN-和酸性大红GR，并且纳米复合材料比单一LDHs吸附性能更优。进一步研究发现，温度、pH、吸附时间、初始浓度等参数对LDHs及其纳米复合材料的吸附性能有一定影响。本研究对于水资源净化技术的研究具有一定的参考意义。
关键词：LDHs；纳米复合材料；水资源净化；SCN-；酸性大红GR
Introduction
Inrecentyears,withthedevelopmentofscienceandtechnology,people'slivingstandardshavebeensignificantlyimproved.However,theproblemofenvironmentalpollutionhasalsobecomeincreasinglyserious.Amongthem,waterpollutionisoneofthemostseriousenvironmentalproblems.Thequalityofwaterresourcesdirectlyaffectspeople'shealthandthesustainabledevelopmentoftheeconomy.Therefore,howtoeffectivelypurifywaterresourceshasbecomeahotresearchtopic.Inthisstudy,weinvestigatedtheadsorptionperformanceofLDHsandtheirnanocompositesforSCN-andAcidRedGRinwater,whichprovidesafeasiblesolutionforwaterresourcespurification.
MaterialsandMethods
LDHsweresynthesizedusingco-precipitationmethod.Thenanocompositeswerepreparedbyaddingcationicsurfactant(CTAB)tothereactionsystemduringthesynthesisprocess.ThesynthesizedmaterialswerecharacterizedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),andtransmissionelectronmicroscopy(TEM).
TheadsorptionexperimentswerecarriedoutbymixingtheLDHsandnanocompositeswithSCN-andAcidRedGRsolutions,respectively.Theeffectsofvariousparameters,suchastemperature,pH,adsorptiontime,andinitialconcentrationwereinvestigated.TheconcentrationofSCN-andAcidRedGRinthesolutionwasmeasuredbyUV-visspectrophotometer.
ResultsandDiscussion
TheLDHsandnanocompositesshowedgoodadsorptionperformanceforSCN-andAcidRedGRinwater.ThenanocompositeshadhigheradsorptioncapacitythansingleLDHs,whichcanbeattributedtotheimprovedsurfaceareaandtheenhancedadsorptionsites.TheadsorptionprocessofSCN-andAcidRedGRontoLDHsandnanocompositesweremainlygovernedbytheelectrostaticattractionandhydrogenbonding.
TheadsorptionperformanceofLDHsandnanocompositeswasaffectedbyvariousparameters.Theadsorptioncapacityincreasedwithincreasingtemperature,whichindicatedthat