Akieh Marceline N, Lahtinen Manu, Väisänen Ari, Sillanpää Mika
Laboratory of Applied Environmental Chemistry, Department of Environmental Sciences, University of Kuopio, Patteristonkatu 1, FIN-50100 Mikkeli, Finland.
J Hazard Mater. 2008 Apr 1;152(2):640-7. doi: 10.1016/j.jhazmat.2007.07.049. Epub 2007 Jul 20.
The ion exchange properties of sodium iron titanates, namely, NaFeTiO(4), Na(2)Fe(2)Ti(6)O(16) and iron-doped sodium nonatitanate were investigated. Conventional solid state and sol-gel methods were used in the synthesis of the sodium iron titanates. Structural characterization of the materials was performed with powder X-ray diffraction (XRD), thermogravimetry (TG), scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) and with inductively coupled plasma optical emission spectrometry (ICP-OES). Based on TG analyses, the novel iron-doped sodium nonatitanate was proven to be a member of the layered titanate family. The different sodium iron titanates were compared based on the efficiency in separating Ni from aqueous streams by conducting batch experiments with a batch factor of 1000 ml/g. Iron-doped sodium nonatitanate exhibited the best ion exchange performance compared to the other sodium iron titanates studied. It was found to be selective for nickel over potassium and showed 99% removal efficiency for Ni.
研究了钠铁钛酸盐（即NaFeTiO(4)、Na(2)Fe(2)Ti(6)O(16)）以及铁掺杂的钠九钛酸盐的离子交换性能。采用传统的固态法和溶胶 - 凝胶法合成钠铁钛酸盐。通过粉末X射线衍射（XRD）、热重分析（TG）、配备能量色散光谱仪（EDS）的扫描电子显微镜（SEM）以及电感耦合等离子体发射光谱法（ICP - OES）对材料进行结构表征。基于热重分析，新型铁掺杂钠九钛酸盐被证明是层状钛酸盐家族的一员。通过进行批量因子为1000 ml/g的批量实验，比较了不同钠铁钛酸盐从水流中分离镍的效率。与所研究的其他钠铁钛酸盐相比，铁掺杂钠九钛酸盐表现出最佳的离子交换性能。发现它对镍具有选择性，对钾则不然，并且对镍的去除效率达到99%。
