Marwani Hadi M, Alsafrani Amjad E, Asiri Abdullah M, Rahman Mohammed M
Chemistry department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
Sensors (Basel). 2016 Jun 29;16(7):1001. doi: 10.3390/s16071001.
A new ionic liquid loaded silica gel amine (SG-APTMS-N,N-EPANTf₂) was developed, as an adsorptive material, for selective adsorption and determination of zirconium, Zr(IV), without the need for a chelating intermediate. Based on a selectivity study, the SG-APTMS-N,N-EPANTf₂ phase showed a perfect selectivity towards Zr(IV) at pH 4 as compared to other metallic ions, including gold [Au(III)], copper [Cu(II)], cobalt [Co(II)], chromium [Cr(III)], lead [Pb(II)], selenium [Se(IV)] and mercury [Hg(II)] ions. The influence of pH, Zr(IV) concentration, contact time and interfering ions on SG-APTMS-N,N-EPANTf₂ uptake for Zr(IV) was evaluated. The presence of incorporated donor atoms in newly synthesized SG-APTMS-N,N-EPANTf₂ phase played a significant role in enhancing its uptake capacity of Zr(IV) by 78.64% in contrast to silica gel (activated). The equilibrium and kinetic information of Zr(IV) adsorption onto SG-APTMS-N,N-EPANTf₂ were best expressed by Langmuir and pseudo second-order kinetic models, respectively. General co-existing cations did not interfere with the extraction and detection of Zr(IV). Finally, the analytical efficiency of the newly developed method was also confirmed by implementing it for the determination of Zr(IV) in several water samples.
开发了一种新型负载离子液体的硅胶胺（SG-APTMS-N，N-EPANTf₂）作为吸附材料，用于选择性吸附和测定锆（Zr(IV)），无需螯合中间体。基于选择性研究，与其他金属离子（包括金[Au(III)]、铜[Cu(II)]、钴[Co(II)]、铬[Cr(III)]、铅[Pb(II)]、硒[Se(IV)]和汞[Hg(II)]离子）相比，SG-APTMS-N，N-EPANTf₂相在pH 4时对Zr(IV)表现出完美的选择性。评估了pH、Zr(IV)浓度、接触时间和干扰离子对SG-APTMS-N，N-EPANTf₂吸附Zr(IV)的影响。新合成的SG-APTMS-N，N-EPANTf₂相中掺入的供体原子的存在，与硅胶（活化的）相比，在提高其对Zr(IV)的吸附能力方面发挥了重要作用，吸附能力提高了78.64%。Zr(IV)在SG-APTMS-N，N-EPANTf₂上的吸附平衡和动力学信息分别用Langmuir模型和伪二级动力学模型来最好地表示。一般共存阳离子不干扰Zr(IV)的萃取和检测。最后，通过将新开发的方法用于测定几种水样中的Zr(IV)，也证实了该方法的分析效率。
