KAGAKU KOGAKU RONBUNSHU
Online ISSN : 1349-9203
Print ISSN : 0386-216X
ISSN-L : 0386-216X
Separation Engineering
Gold Ion Adsorption on Chitosan Membrane and Separation and Recovery from the Membrane as Gold Nanoparticles
Kyohei KanoyaYoshinari Baba
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2019 Volume 45 Issue 3 Pages 123-126

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Abstract

Chitosan film was prepared by the casting method using chitosan dissolved in acetic acid solution, then immersed in an alkaline solution, washed well with distilled water and dried. To adsorb gold ions, the dried film was immersed in 0.1 M NaCl solution containing 1,000 ppm of gold. The film with adsorbed gold ions was then dried, and gold was desorbed using various aqueous solutions containing a reductant. The gold ions were desorbed from the chitosan film as solid nanoparticles of gold. The morphology of the particles depended on the kind of reductant and reduction time but was independent of the concentration of reductant.

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© 2019 The Society of Chemical Engineers, Japan
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