Department of Chemical Engineering and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
J Hazard Mater. 2013 Sep 15;260:1057-63. doi: 10.1016/j.jhazmat.2013.06.059. Epub 2013 Jul 1.
A simple and novel process has been proposed to synthesize alumina using gardenia extract and aluminum salts in an aqueous solution. The alumina sample notated as "bio-Al₂O₃" was characterized by X-ray diffraction (XRD) and nitrogen adsorption-desorption experiment. The results indicated that the existence of the gardenia biomass enlarged the surface area of alumina and reached 256 m(2)/g. The thermo gravimetric (TG), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) results showed that gardenia biomass bound to the surface of the alumina has substantially improved the adsorption capacity of Ni(II) and the adsorption behavior of nickel ion was related to the biomass functional groups. The results of three adsorption-desorption cycles showed that the bio-Al₂O₃ using as the adsorbent for Ni(II) was relatively stable. The kinetic of the Ni(II) adsorption by the bio-Al₂O₃ followed pseudo-second-order equation. Langmuir and Freundlich isotherm models were applied to analyze the experimental data and the result demonstrated that the adsorption isotherms followed Langmuir isotherm model.
一种使用栀子提取物和铝盐在水溶液中合成氧化铝的简单新颖方法已经提出。用 X 射线衍射（XRD）和氮气吸附-脱附实验对标记为“生物-Al₂O₃”的氧化铝样品进行了表征。结果表明，栀子生物质的存在增加了氧化铝的表面积，达到了 256 m²/g。热重（TG）、X 射线光电子能谱（XPS）和傅里叶变换红外（FTIR）的结果表明，栀子生物质结合在氧化铝表面上显著提高了 Ni(II)的吸附能力，镍离子的吸附行为与生物质官能团有关。三次吸附-解吸循环的结果表明，用作 Ni(II)吸附剂的生物-Al₂O₃相对稳定。Ni(II)在生物-Al₂O₃上的吸附动力学符合拟二级方程。Langmuir 和 Freundlich 等温模型被用来分析实验数据，结果表明吸附等温线符合 Langmuir 等温模型。
