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中文摘要：
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pH8.0，振荡5min，静置12h条件下，0.1000g改性纳米TiO2能定量吸附Ni（Ⅱ）；10mL 4mol／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。
英文摘要：
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.
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