2,6二-氨基吡啶修饰Fe_3O_4纳米粒子对Cu^(2+)和Zn^(2+)的吸附性能  

Adsorption Property of 2,6-Diminopyridine Modified Fe_3O_4 Nanoparticles on Copper(Ⅱ) and Zinc(Ⅱ)

作　　者：翟云会[1] 阮晓芳[2] 王振[1] 翁姣[1] 

机构地区：[1]西安文理学院化学与化工系,西安市太白南路168号710065 [2]西安文理学院教务处,西安市太白南路168号710065

出　　处：《光谱实验室》2011年第4期2042-2046,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：西安文理学院重大科研基金项目(ZD200902)

摘　　要：制备了表面修饰2,6-二氨基吡啶试剂的新型复合磁性Fe3O4纳米粒子,采用红外光谱对其进行了表征,并以火焰原子吸收光谱法(FAAS)测定其对水中Cu2+和Zn2+等重金属离子的静态吸附性能,考察了溶液pH值、平衡时间、吸附物初始浓度、洗脱条件等对复合材料吸附性能的影响。结果表明,复合材料在pH6—7时可对水中Cu2+和Zn2+产生有效吸附,5min内即可达到吸附平衡,等温吸附数据符合Langmuir单分子层吸附模型,T=298K,pH=7,V=50mL时对两种离子的饱和吸附量分别为45mg.g-1和32mg.g-1,重复使用6次其饱和吸附能力未见明显下降。A new magnetic composite sorbent,Fe3O4 nanoparticles,modified by 2,6-diminopyridine was prepared,and characterized by FTIR.The adsorption property of this sorbent for Cu^2＋ and Zn^2＋ from aqueous solution was determined by flame atomic absorption spectrometry（FAAS）.The effects of pH value in aqueous solution,adsorption time,initial concentration and elution condition on adsorption were investigated.The results showed that Cu^2＋ and Zn^2＋ could be effectively adsorbed on the composite particles at pH 6—7.And only 5 min was needed for the equilibration.The adsorption data followed Langmuir lay molecule adsorption model.Under optimal conditions（T=298K,pH=7,V=50mL）,the maximal adsorption capacity for Cu^2＋ and Zn^2＋ was 45mg·g^-1 and 32mg·g^-1,respectively.The adsorption performance did not decreased obviously after six reuses.

关 键 词：磁性FE3O4纳米粒子 2 6二-氨基吡啶 修饰 火焰原子吸收光谱法 

分 类 号：O657.31[理学—分析化学]