山东化工收稿日期:2022－11－16作者简介:章贞阳，女，硕士，研究方向为纳米材料的制备及其在废水中的应用。壳聚糖磁性纳米材料的制备及对罗丹明6G吸附研究章贞阳(连云港职业技术学院材料与化工学院，江苏连云港222001)摘要:制备了一种新型的壳聚糖修饰的比表面积大的磁性纳米材料，并成功应用于染料废水中罗丹明6G(Ｒ6G)的吸附。考查了几个重要的影响吸附因素的水平，pH值、吸附时间、吸附剂的用量和Ｒ6G的初始浓度对吸附的影响，进而确定磁性纳米材料对Ｒ6G吸附的最佳吸附条件。用乙醇对吸附剂洗脱进行8次重复吸附，仍具有良好的再生吸附能力。通过动力学吸附模型的考察，壳聚糖修饰的磁性纳米材料对Ｒ6G的吸附模型符合准二级动力学。热力学符合Langmuir曲线模型。在最佳条件下，饱和吸附容量为93．90mg·g－1。壳聚糖修饰磁性纳米材料对染料废水的吸附，对寻找生物基材料作为废水处理吸附剂具有潜在的现实意义。关键词:壳聚糖;磁性纳米;吸附;碱性染料中图分类号:TQ424;X703文献标识码:A文章编号:1008－021X(2023)03－0020－06PreparationofChitosanMagneticNanomaterialsandAdsorptionStudiesonＲhodamine6GZhangZhenyang(SchoolofMaterialsandChemicalEngineering，LianyungangTechnicalCollege，Lianyungang222001，China)Abstract:Anovelchitosan－modifiedmagneticnanomaterialwithalargespecificsurfaceareawaspreparedandsuccessfullyappliedtotheadsorptionofrhodamine6G(Ｒ6G)fromdyewastewater．Severalimportantfactorsaffectingthelevelofadsorption，pH，determinationoftheadsorptionequilibriumtime，theamountofadsorbentandtheinitialconcentrationofＲ6GonadsorptionwereexaminedtodeterminetheoptimumadsorptionconditionsfortheadsorptionofＲ6Gbymagneticnanomaterials．Theadsorbentwaselutedwithethanolforeightreplicateadsorptionandstillhadgoodregenerativeadsorptioncapacity．Byexaminingthekineticadsorptionmodel，theadsorptionofＲ6Gindyewastewaterbychitosan－modifiedmagneticnanomaterialswasconsistentwiththepseudosecond－orderkineticmodel．TheadsorptionthermodynamiccurveswereinaccordancewiththeLangmuirmodel．Thesaturationadsorptioncapacitywas93．90mg·g－1underoptimalconditions．Theadsorptionofchitosan－modifiedmagneticnanomaterialsondyewastewaterispotentiallyrelevanttothesearch...
