引用本文:
郝存江, 冯青琴, 元炯亮, 韩玉民. 纳米γ-Al2O3的制备及其对铅(Ⅱ)镉(Ⅱ)铬(Ⅵ)的吸附性能[J]. 应用化学,
2004, 21(9): 958-961.
Citation: HAO Cun-Jiang, FENG Qing-Qin, YUAN Jiong-Liang, HAN Yu-Min. Preparation of Nanometer γ-Al2O3 Powders and Their Adsorption Behaviour to Pb(Ⅱ) Cd (Ⅱ) Cr(Ⅵ) Ions[J]. Chinese Journal of Applied Chemistry, 2004, 21(9): 958-961.
Citation: HAO Cun-Jiang, FENG Qing-Qin, YUAN Jiong-Liang, HAN Yu-Min. Preparation of Nanometer γ-Al2O3 Powders and Their Adsorption Behaviour to Pb(Ⅱ) Cd (Ⅱ) Cr(Ⅵ) Ions[J]. Chinese Journal of Applied Chemistry, 2004, 21(9): 958-961.
纳米γ-Al2O3的制备及其对铅(Ⅱ)镉(Ⅱ)铬(Ⅵ)的吸附性能
摘要:
采用溶胶-凝胶法合成纳米γ-Al2O3,以透射电镜(TEM)、X射线衍射(XRD)、比表面积测定(BET)等技术对所得的纳米γ-Al2O3进行了表征。表明纳米粒子的直径在3070 nm,并利用Zetaplus电位仪测定了其等电点。考察了纳米γ-Al2O3材料在静态吸附条件下对Pb(Ⅱ)、Cd(Ⅱ)、Cr(Ⅵ)金属离子的吸附性能。结果表明,在pH值为67条件下,对金属离子Pb(Ⅱ)、Cd(Ⅱ)、Cr(Ⅵ)有强烈的吸附能力,且符合Freundlich吸附方程。吸附于纳米γ-Al2O3上的金属离子可用0.1 mol/LHCl溶液进行解脱,再生后的纳米γ-Al2O3吸附能力基本不变。
English
Preparation of Nanometer γ-Al2O3 Powders and Their Adsorption Behaviour to Pb(Ⅱ) Cd (Ⅱ) Cr(Ⅵ) Ions
Abstract:
The nanometer γ-Al2O3 powders were prepared by a Sol-Gel method and characterized by TEM, XRD, BET and Zeta potential measurements. The diameters of the powders were ranged in 30 nm to 70 nm. The results showed that the powders have strong adsorption capacity towards Pb(Ⅱ), Cd (Ⅱ) and Cr(Ⅵ) ions at a pH value of medium ranging from 6.0 to 7.0. The adsorption isotherms of metal ions on the powders fit Freundlich adsorption equation. The adsorbed metal ions on the powders could be desorbed in 0.1 mol/L HCl solution and the powder could be regenerated and used without loss of its adsorbability.
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Key words:
- nanometer γ-Al2O3
- / Sol-Gel method
- / adsorption
- / Pb(Ⅱ)
- / Cd(Ⅱ)
- / Cr(Ⅵ)
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