2023·02精细化工78ModernChemicalResearch当代化工研究2023·02精细化工78ModernChemicalResearch当代化工研究镍钴水滑石负载偕胺肟化竹纤维在铀吸附中的应用研究＊郝武民1张顺孝1朱佳慧2(1.中核四0四有限公司甘肃7351002.哈尔滨工程大学材料科学与化学工程学院黑龙江150080）摘要：为设计一种具有实际应用价值且对U（VI）具有高吸附容量的吸附材料，采用乙烯基三乙氧基硅烷作为偶联剂将丙烯腈接枝在可大面积编织的天然竹纤维上，再利用盐酸羟胺水解制备偕胺肟化竹纤维（AOBS）。以AOBS为基底材料，尿素提供碱性条件，利用水热法直接制备镍钴水滑石负载偕胺肟化竹纤维（NiCoLDH/AOBS）。利用XRD表征可知AOBS表面NiCoLDH主要为CoOOH和Ni(OH)2，而且NiCoLDH/AOBS具有超亲水特性，可在1s达到完全浸润状态。NiCoLDH/AOBS的最佳吸附pH为6.0，拥有259.80mg·g-1的饱和吸附容量，吸附过程符合准二级动力学方程和Freundlich吸附模型。因此，NiCoLDH/AOBS复合吸附材料是一种具有较高吸附容量和实际应用价值的吸附材料。关键词：镍钴水滑石；偕胺肟；竹纤维；铀吸附中图分类号：TB33文献标识码：AResearchontheApplicationofNickel-CobaltHydrotalcite-SupportedAmidoximizedBambooFibersCompositeMaterialinUraniumAdsorptionHaoWumin1,ZhangShunxiao1,ZhuJiahui2(1.The404CompanyLimited,ChinaNationalNuclearCorporation,Gansu,7351002.CollegeofMaterialsScienceandChemicalEngineering,HarbinEngineeringUniversity,Heilongjiang,150080)Abstract：InordertodesignanadsorptionmaterialwithpracticalapplicationvalueandhighadsorptioncapacityforU(VI),vinyltriethoxysilaneisusedasacouplingagenttograftacrylonitrileonthenaturalbamboofiberswithmacrobraidability,andtheamidoximizedbamboofibers(AOBS)arepreparedbyhydrolysisofhydroxylaminehydrochloride.Subsequently,AOBSandureawereusedasthebasematerialandthebasiccondition,respectively,andthenickel-cobalthydrotalcite-supportedamidoximizedbamboofibers(NiCoLDH/AOBS)aredirectlypreparedbyhydrothermalmethod.AccordingtotheresultofXRDcharacterization,theNiCoLDHonAOBSsurfaceismainlyCoOOHandNi(OH)2.Furthermore,theNiCoLDH/AOBShassuper-hydrophilicpropertiesandcanreachafullywettedstatewithin1s.TheoptimumadsorptionpHoftheNiCoLDH/AOBSis6.0,andtheadsorptioncapacity...
