第３９卷第１期２０２３年３月金陵科技学院学报JOURNALOFJINLINGINSTITUTEOFTECHNOLOGYVol．３９,No．１Mar．,２０２３DOI:１０．１６５１５/j．cnki．３２Ｇ１７２２/n．２０２３．０１．００９Fe３O４/CS/EDTA对水溶液中Cu２＋和Ni２＋的吸附研究秦润华,周洋,赵雲胤(金陵科技学院材料工程学院,江苏南京２１１１６９)摘要:分析了自制的Fe３O４/CS/EDTA纳米粒对水溶液中的重金属离子Cu２＋和Ni２＋的吸附性能和吸附机理.研究了pH值、溶液初始浓度、反应时间等对吸附性能的影响,结合红外、XPS和比表面分析结果确定了参与吸附配位的功能基团及可能发生的络合反应.结果表明:Fe３O４/CS/EDTA对Cu２＋和Ni２＋的吸附等温线均符合Langmuir模型,对Cu２＋的吸附效果要优于Ni２＋,这可能与Ni２＋的离子半径较Cu２＋小以及Ni２＋与吸附剂形成的金属螯合物的稳定性较Cu２＋低有关;Fe３O４/CS/EDTA对Cu２＋和Ni２＋的吸附机理类似于NO型螯合剂,并非一般的物理吸附,而是一种以金属离子为中心的吸附螯合.关键词:Fe３O４/CS/EDTA;吸附性能;吸附机理;Cu２＋;Ni２＋中图分类号:TB３４文献标识码:A文章编号:１６７２７５５X(２０２３)０１００５８０６收稿日期:２０２３０３１３基金项目:江苏省产学研合作项目(BY２０２２６８６)作者简介:秦润华(１９７８—),女,河北唐山人,副教授,博士,主要从事材料的修饰改性研究.StudyontheAdsorptionofCu２＋andNi２＋inAqueousSolutionbyFe３O４/CS/EDTAQINRunＧhua,ZHOUYang,ZHAOYunＧyin(JinlingInstituteofTechnology,Nanjing２１１１６９,China)Abstract:HeavymetalionsCu２＋andNi２＋inaqueoussolutionweretakenastheobject,andtheadsorptionpropertiesandadsorptionmechanismofselfＧmadeFe３O４/CS/EDTAnanoparticleswerestudied．TheeffectsofpHvalue,solutioninitialconcentration,reactiontimeandotherfactorsonadsorptionpropertieswerestudied．Combinedwithinfrared,XPSandspecificsurＧfaceanalysisresults,thefunctionalgroupsinvolvedintheadsorptioncoordinationandtheposＧsiblecomplexationreactionweredetermined．TheresultsshowthattheadsorptionisothermsofFe３O４/CS/EDTAforCu２＋andNi２＋conformtotheLangmuirmodel,theadsorptioneffectofCu２＋isbetterthanthatofNi２＋．ThismayberelatedtothefactthationicradiusofNi２＋issmallerthanthatofCu２＋,thestabilityofmetalchelatesformedbyNi２＋...
