Synthesis and characterization of polystyrene‐supported glucosamine resin and its adsorption behavior for Au(III)

Abstract

A novel chelating resin, crosslinking polystyrene-supported glucosamine (PS-GA), was prepared and its structure was confirmed by FTIR, elemental analysis, and X-ray photoelectron spectroscopy. The adsorption properties of PS-GA for Au(III) were investigated. PS-GA resin possessed excellent enriching property to Au(III) ions and adsorption proportion E% could reach to about 90 shortly after 3 h. The adsorption dynamics of Au(III) showed that the adsorption was controlled by liquid film diffusion and the apparent activation energy E a was 12.91 kJ mol Ϫ1. BothLangmuir model and Freundlich model could describe the isothermal process of Au(III), and ⌬G, ⌬H, ⌬S values were calculated. The mechanism of adsorption for Au(III) was confirmed by FTIR, SEM, and XPS. The results showed that redox reaction occurred and both coordination and ionexchange existed simultaneously in the adsorption.

Chitosan and Its Derivatives as Highly Efficient Polymer Ligands

“…The ratio between forms in different oxidation state in sorbent phase depends on the type of derivative with the highest content of reduced species—Au(0) and Pt(II) found in chitosan [158]. Taking into account literature data on Au(III) reduction to Au(0) in the process of sorption on polystyrene-supported glucosamine resin [160], chitosan [159] and other N -containing derivatives of biopolymers [161,162], one can suggest that formation of elemental gold was the most probable reason for high sorption capacity of unmodified chitosan for Au(III) ions.…”

Application of chitosan and its N-heterocyclic derivatives for preconcentration of noble metal ions and their determination using atomic absorption spectrometry

“…Bratskaya et al, 2012).The second trend shows that increased number of Lewis base sites due to introduction of electron donor N-atoms of functional fragments does not necessarily leads to higher sorption capacity toward Au(III) ions. Thus other mechanisms different from ion-exchange can contribute to Au(III) sorptionon chitosan and its N-derivatives..Taking into account literature data on Au(III) reduction to Au(0) in the process of sorption on polystyrene-supported glucosamine resin(Sun et al, 2006), chitosan(Alexander Pestov, Nazirov, Modin, Mironenko, & Bratskaya, 2015b) and other Ncontaining derivatives of biopolymers(Gurung, Adhikari, Gao, Alam, & Inoue, 2014)(Parajuli, Kawakita, Inoue, & Funaoka, 2006), one can suggest that formation of elemental gold was the most probable reason for high sorption capacity of unmodified chitosan for Au(III) ions. To elucidate whether the noble metals change oxidation state upon sorption on chitosan, 2-PEC, 4-PEC, and IMC sorbents were analyzed by XPS.…”

Pore structure control factors of polyamine-bridged polysilsesquioxanes by sol–gel method and their structure-adsorption properties for Au(III)

“…The high loading capacity is possibly due to the release of adsorbed Au(III) from the resin body in Au(0) or Au(I) form and use of vacant sites by Au(III) in the solution phase that makes an adsorption [of Au(III)]–reduction [to Au(0) or Au(I)]–release [of Au(0)]–adsorption cycle [17]. Similar phenomena also have been found in other materials containing –OH or –NH [18,19]. …”