Department of Process Engineering, Memorial University of Newfoundland, St. John's, A1B 3X5, Canada.
Department of Process Engineering, Memorial University of Newfoundland, St. John's, A1B 3X5, Canada.
Carbohydr Polym. 2018 Nov 15;200:297-304. doi: 10.1016/j.carbpol.2018.07.097. Epub 2018 Aug 4.
In this study, a novel porous alginate adsorbent was prepared by zinc oxide templating to selectively adsorb Au (III) ions from multi-metallic solutions under acidic condition. Due to the porous structure of the prepared sorbent, high uptake capacity and fast adsorption kinetics of Au (ІІІ) were achieved, which renders the prepared adsorbent great potential for practical applications in fixed-bed columns for large-scale applications. The adsorption of Au (III) by the prepared adsorbent led to the reduction of Au (III) to metallic gold. Adsorption and reduction of Au (III) in the process are mediated by the ionic and covalent interaction between Au (III) ions and the protonated functional groups on the modified alginate.
在这项研究中，通过氧化锌模板法制备了一种新型多孔海藻酸钠吸附剂，可在酸性条件下从多金属溶液中选择性吸附 Au(III)离子。由于制备的吸附剂具有多孔结构，实现了对 Au(III)的高吸附容量和快速吸附动力学，这使得制备的吸附剂在用于大规模应用的固定床柱中具有很大的实际应用潜力。制备的吸附剂对 Au(III)的吸附导致 Au(III)被还原为金属金。Au(III)的吸附和还原过程是通过 Au(III)离子与改性海藻酸钠上质子化官能团之间的离子和共价相互作用来介导的。
