Separation of rare metals using silica gel modified with a surfactant micelle containing an extractant
作者： Kazuo Kondo , Masaya Takeda , Michiaki Matsumoto
DOI: 10.1016/J.HYDROMET.2015.09.030
关键词:
摘要: Abstract Solvent extraction is widely used as a universal method to extract and separate metals in industry. However solvent has some disadvantages, for example, the use of large amount organic which could be an environmental hazard. Therefore solid-phase proposed this research. First all, silica gel modified with nonionic surfactant (TritonX-100) micelle including 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (EHPNA) metal extractant been prepared. The contained was measured evaluate characteristics gel. Then stability examined. Next, adsorption equilibrium rate (aluminum, gallium indium) were estimate mechanism metals. Finally, mutual separation aluminum, indium using packed column investigated. EHPNA impregnated 0.205 mmol/g-silica can stable adsorbent below pH 2.0 without leaking EHPNA. results showed that higher pH, extent adsorbed. And among indium, only recovered three-metal mixture solution ranging pH 1.0 pH 1.5. In contrast, result examination each column, achieved by repeating desorption processes.
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