纳米氧化锌的制备表征及其对Cu(Ⅱ)、Co(Ⅱ)、Fe(Ⅲ)的吸附

Preparation of Nano-Size ZnO and Study on the Adsorption Behavior toward Cu(Ⅱ),Co(Ⅱ),Fe(Ⅲ)

以Zn(Ac)2.2H2O和H2C2O4.2H2O为材料,固相合成氧化锌纳米材料.以原子吸收分光光度法(AAS)为手段检测了纳米氧化锌对Cu(Ⅱ),Co(Ⅱ),Fe(Ⅲ)的吸附洗脱性能.结果表明:在碱性条件下纳米氧化锌的吸附效果较酸性条件下好.因此,选择在酸性条件下对金属离子进行洗脱.实验测得氧化锌对上述金属离子的静态吸附容量分别为:15.3、19.1和19.5mg/g.

A method using Zn(Ac)2·2H2O and H2C2O4·2H2O as the starting material,nano-size ZnO was synthesized in solid-phase.The product was characterized by TEM,XRD.The nano granule particle size is 30~40nm.The adsorbtion behavior of Cu(Ⅱ),Co(Ⅱ) and Fe(Ⅲ) was determinated with AAS.The results indicated in pH9 ~ 10,nano-size ZnO adsorption rate to several kind of metal ions was above 90%.And the static absorption capacities to Cu(Ⅱ),Co(Ⅱ) and Fe(Ⅲ) on nano ZnO were 15.3,19.1 and 19.5 mg/g respectively.