Optimization of carboxyl-functionalized mesoporous silica for the selective adsorption of dysprosium
作者： Takamasa Kaneko , Fukue Nagata , Shinichi Kugimiya , Katsuya Kato
DOI: 10.1016/J.JECE.2018.09.018
关键词: Adsorption 、 Chemical engineering 、 Materials science 、 Ion 、 Thermogravimetric analysis 、 Dysprosium 、 Mesoporous silica 、 Selective adsorption 、 Inductively coupled plasma 、 Transmission electron microscopy
摘要: Abstract Dysprosium (Dy), one of the rare-earth elements, was adsorbed on four types mesoporous silica, having pore size 3–22 nm and functionalized with amino carboxyl groups surface. The influence selective Dy ion adsorption capacity examined using a metal mixture. synthesized materials characterized by field emission scanning electron microscopy, transmission Brunauer-Emmett-Teller analyzer. In addition, were thermogravimetric analyzer, Fourier transform infrared, zeta-potential. amount ions particles evaluated inductively coupled plasma optical spectrometry. material large (22 nm) as well chains manifested an excellent for (32.9 μg/mg). recycling efficiency adsorption-desorption process retained approximately 100% capability at least five cycles. These results suggested that 22 nm can be used adsorbent efficient removal from mixtures.
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