Adsorption of Divalent Transition Metal Ions with a Chelating Agent on Octadecyl Silica Gel
Adsorption of Divalent Transition Metal Ions with a Chelating Agent on Octadecyl Silica Gel
复制标题
十八烷基硅胶上螯合剂对二价过渡金属离子的吸附
DOI：
10.2116/analsci.20.1463
复制
发表时间：
2004
影响因子：
1.6
通讯作者：
Y. Komatsu
中科院分区：
文献类型：
--
作者：
Masamitsu Iiyama;S. Oshima;H. Kokusen;M. Sekita;S. Tsurubou;Y. Komatsu
本研究考察了十八烷基硅胶 (C18g) 与 4,4-三氟-1-(2-噻吩基)-1,3-丁二酮 (TTA) 螯合剂对二价过渡金属离子的萃取能力。为了吸附金属离子，开发了一种将 TTA 保留在 C18g 上的方法（TTA-C18g）。发现该体系中过渡金属Ni^2+-Co^2+之间的半吸附和半萃取pH值差异为0.7。这比之前发表的使用 TTA 硝基苯的传统萃取方法的结果 0.3 更好。 TTA-C18g可以吸附水溶液中96%以上的金属离子。我们的系统没有有机相，与在甲苯或硝基苯中使用 TTA 的传统溶剂萃取方法相比，可以更好地去除或分离过渡金属离子。
This investigation looked at the extraction ability of divalent transition metal ions onto an octadecyl silica gel (C18g) with a 4,4-trifluoro-1-(2-thienyl)-1,3-butadione (TTA) chelating agent. A method of retaining TTA onto C18g (TTA-C18g) was developed in order to adsorb the metal ions. The difference in the half-adsorption and half-extraction pH values between transition metals Ni^2+-Co^2+ was found to be 0.7 in this system. This is better than previously published results of 0.3 for the conventional extraction method using TTA in nitrobenzene. More than 96% of the metal ions in aqueous solution could be adsorbed onto TTA-C18g. Our system, which has no organic phase, can achieve a better removal or separation of transition metal ions than the conventional solvent-extraction methods using TTA in toluene or nitrobenzene.