改性纳米二氧化钛对镍(Ⅱ)吸附行为的研究和分析应用  

Study on the adsorption behavior of modified nanometer-sized TiO_2 to nickel(Ⅱ) and its analytical application

作　　者：毛艳丽[1,2] 王远红[2] 罗世田 张奎[2] 闫永胜[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013 [2]河南城建学院,河南平顶山467001 [3]平顶山市建设工程质量监督站,河南平顶山467001

出　　处：《冶金分析》2009年第11期65-68,共4页Metallurgical Analysis

基　　金：国家自然科学基金(20877036);科技部基金资助项目(05C26213100474)

摘　　要：利用浸渍法对纳米TiO2进行表面改性,制备出改性纳米TiO2,并用扫描电镜(SEM)对其进行了表征。以火焰原子吸收光谱法(FAAS)探讨了改性纳米TiO2在静态吸附条件下对Ni(Ⅱ)的吸附性能,影响吸附和解脱的主要因素及Ni(Ⅱ)的吸附等温线,常见共存离子对Ni(Ⅱ)测定的影响,并做了再生实验。结果表明:在pH 8.0,振荡5 min,静置12 h条件下,0.100 0 g改性纳米TiO2能定量吸附Ni(Ⅱ);10 mL 4 mol/L硝酸作为解脱剂可使Ni(Ⅱ)定量解脱;改性纳米TiO2对Ni(Ⅱ)的吸附性能良好。该吸附剂已用于环境水样中Ni(Ⅱ)的测定。The modified nanometer-sized TiO2 was prepared by using immersion method, and charac-terized by scanning electron microscope （SEM）. Problems including the adsorption properties of mod- ified nanometer-sized TiO2 to Ni （Ⅱ） under static adsorption conditions, main factors influencing adsorption and desorption, adsorption isotherms of Ni （Ⅱ） and the effect of common coexisting ions on the determination of Ni（Ⅱ） were investigated by flame atomic absorption spectrometry （FAAS）. Moreover, regeneration test was conducted. The results showed that when sample solution containing the sorbent was vibrated for 5min and placed for 12 h at pH 8.0, Ni（Ⅱ） could be adsorbed quantitively by 0. 100 0 g of modified nanometer-sized TiO2. Ni（Ⅱ） adsorbed onto the sorbent could be desorbed with 10 mL of 4.0 mol/L HNO3. The modified nanometer-sized TiO2 exhibited excellent adsorption properties to Ni（Ⅱ）,and it has been applied to the determination of Ni（Ⅱ） in environmental water samples.

关 键 词：改性纳米TiO2 火焰原子吸收光谱法(FAAS) 吸附 Ni(Ⅱ) 

分 类 号：O652.6[理学—分析化学] O657.31[理学—化学]