Reports from UNIST Describe Recent Advances in Chemical Engineering (Mechanistic investigation on the green recovery of ionic, nanocrystalline, and metallic gold by two anionic nanocelluloses)
Our news journalists obtained a quote from the research from UNIST, "The derivatives of anionic nanocellulose were used for recovery of the ionic, nanoparticulate, and metallic forms of Au. The ADAC samples were promising sorbing phase (57 and 60 mg/g capacity) even at low pH for the treatment of the gold-polluted waters. Thermodynamically, ADAC hydrogels were remained active at moderate to higher temperature (295-333 K) in an endothermic way. Reduction of Au occurred at different stages of kinetic curves, facilitating the formation of zerovalent gold (48 and 41 nm particle size). The Au recovery minimally altered by the competing heavy metals (Cd, Co, Cr, Ni, and As), either at equivalent or lower concentrations. A significant amount of Au(III) (83-99%) regenerated by a strong complexing eluent (0,5 M thiourea in 1 M HCl), moreover thermal crystallization yielded metallic gold in an excellent amount (94%). The mechanism of adsorptive-reduction of gold-nanocellulose were investigated and characterized by the spectroscopic studies including X-ray photoelectron spectroscopy."
According to the news editors, the research concluded: "Overall, recovery of gold in desired forms from nanocellulose can be viewed as an effective biomaterial management strategy."
For more information on this research see: Mechanistic investigation on the green recovery of ionic, nanocrystalline, and metallic gold by two anionic nanocelluloses.
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