Department of Process Engineering, Memorial University, St. John's, Canada.
Department of Process Engineering, Memorial University, St. John's, Canada.
Carbohydr Polym. 2017 Mar 1;159:108-115. doi: 10.1016/j.carbpol.2016.11.095. Epub 2016 Dec 8.
In this study, modified alginate biosorbent has shown a remarkably selective adsorption of Au (III) ions from multi-metallic solutions containing equal moles of Au (III), Pd (II), Pt (IV), Co (II), Ni (II) and Cu (II) ions under acidic conditions. The maximum uptake capacity of Au (III) was found to be 8.47mmolg at 323.15K. Adsorption of Au (III) by modified alginate biosorbent was accompanied by chemical reduction of Au (III), leading to the formation of gold nanocrystals and microcrystals. Biosorption and reduction of Au (III) in acidic media are mediated by the electrostatic and covalent interactions between Au (III) and hydroxyl, carboxyl, amino and CS functional groups of modified alginate adsorbent.
在这项研究中，改性海藻酸钠生物吸附剂在酸性条件下，从含有等量的 Au(III)、Pd(II)、Pt(IV)、Co(II)、Ni(II)和 Cu(II)离子的多金属溶液中，对 Au(III)离子表现出显著的选择性吸附。在 323.15K 时，Au(III)的最大吸附容量为 8.47mmol/g。改性海藻酸钠生物吸附剂对 Au(III)的吸附伴随着 Au(III)的化学还原，导致金纳米晶和微晶的形成。在酸性介质中，Au(III)的生物吸附和还原是由 Au(III)与改性海藻酸钠吸附剂的羟基、羧基、氨基和 CS 官能团之间的静电和共价相互作用介导的。
