Magnetic separation of metal ions
Magnetic separation of metal ions
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DOI：
10.1021/jp030688c
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发表时间：
2003-12-25
影响因子：
3.3
通讯作者：
Tanimoto, Y
中科院分区：
文献类型：
--
作者：
Chie, K;Fujiwara, M;Tanimoto, Y
研究了Co ~（2+）（9500 × 10 ~（-6）cm ~（3）mol ~（-1））和Fe ~（2+）（14600 × 10 ~（-6）cm ~（3）mol ~（-1））离子以及Cr ~（3+）（6200 × 10 ~（-6）cm ~（3）mol ~（-1））和Al ~（3+）（-2 × 10 ~（-6）cm ~（3）mol ~（-1））离子的磁分离。将金属离子溶液点在硅胶载体上，并暴露于410 kOe（2）cm（-1）强度x梯度的磁场中。Co ~（2+）离子比Fe ~（3+）离子向最大电场方向移动得更远。这一结果被解释的事实，即Fe 3+离子更强烈地吸附在硅胶表面上比Co 2+离子。Cr ~（3+）离子比Al ~（3+）离子向场中心移动得更远。这是因为Cr 3+离子比Al 3+离子更强地被磁力吸引。结果表明，该分离方法有效地利用了吸附活性和磁性。
The magnetic separation was investigated for Co2+ (9500 x 10(-6) cm(3) mol(-1)) and Fell (14600 x 10(-6) cm(3) mol(-1)) ions and for Cr3+ (6200 x 10(-6) cm(3) mol(-1)) and Al3+ (-2 x 10(-6) cm(3) mol(-1)) ions. The metal ion solutions were spotted on a silica gel support, and exposed to a magnetic field of 410 kOe(2) cm(-1) intensity x gradient. The Co2+ ions move farther toward the maximum field than the Fe3+ ions. The result is explained by the fact that the Fe3+ ions are adsorbed more strongly on the silica gel surface than the Co2+ ions. The Cr3+ ions move farther toward the field center than the Al3+ ions. This occurs because the Cr3+ ions are attracted more strongly by the magnetic force than the Al3+ ions. It is demonstrated that the separation makes effective use of the adsorption activities as well as the magnetic susceptibilities.