APTES改性介孔硅的制备及对重金属离子的吸附性能研究  

Preparation of APTES modified mesoporous silica and its adsorption property for heavy metal ions

作　　者：朱晓强 祝建中[1] 丁莹[1] 洪陵成[1] 吉栋梁[1] 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室河海大学环境学院,南京210098

出　　处：《化工新型材料》2017年第3期144-146,共3页New Chemical Materials

基　　金：国家自然科学基金(51438006);国家重大仪器设备开发专项经费(2014YQ060773);水利部"948"项目(30155045912);江苏高校优秀学科建设工程资助项目(RAPD);江苏省普通高校研究生科研创新计划项目(KYZZ15-0147)

摘　　要：以介孔二氧化硅为原材料,将3-氨基丙基三乙氧基硅烷(APTES)改性接枝到介孔硅表面,对改性介孔二氧化硅进行表征分析。介孔硅具有较高的比表面积,而APTES中的氨基具吸附重金属功能,使得氨基改性介孔硅吸附重金属离子的功能更强。探讨了介孔硅对重金属的吸附性能,考察氨基功能化介孔硅吸附剂对重金属镉离子(Cd^(2+))、铅离子(Pb^(2+))、铜离子(Cu^(2+))的选择吸附作用。实验结果表明,吸附时间8h以上,介孔硅和改性介孔硅对Cd^(2+)的吸附量分别为0.14、0.15mg/g,对Pb^(2+)的吸附量分别为0.14、0.15mg/g,对Cu^(2+)的吸附量分别为0.13、0.15mg/g;在温度为25℃,震荡时间为24h的条件下,改性介孔硅对Pb^(2+)吸附性能最好,吸附量为0.13mg/g,其次是Cu^(2+)为0.02mg/g,最后是Cd^(2+)为0.01mg/g,说明在3种金属的混合溶液中,改性介孔硅对Pb^(2+)有良好选择吸附性。The mesoporous silica as raw material,the surface was grafted with 3-aminopropyl triethoxy silane（APTES）.The modified mesoporous silica were characterized and analyzed.The modified silica had a high specific surface area,while the amino group of APTES had the function of adsorbing heavy metal ions,which made the function of modified silica to adsorb heavy metals.The adsorption properties of silica for heavy metals Pb2＋,Cd2＋and Cu2＋were investigated.The results showed that the adsorption time more than 8h,mesoporous silica and modified mesoporous silica adsorption of Cd2＋were 0.14mg/g,0.15mg/g,for Pb2＋were 0.14mg/g,0.15mg/g,and for Cu2＋were 0.13 mg/g,0.15mg/g,respectively.Under the conditions of temperature 25℃ and shaking time 24 h,the adsorption performance of modified silica to Pb2＋was best,adsorption capacity was 0.13mg/g,the second was the Cu2＋0.02mg/g,and at last the Cd2＋0.01mg/g.It showed that in the mixed solution of three kinds of metal,modified silica for Pb2＋had a good selection.

关 键 词：介孔二氧化硅 氨基改性 重金属离子 吸附 

分 类 号：O647.33[理学—物理化学]