Syntheses and characterization of polystyrene-supported 2,5-dimercapto-1,3,4-thiodiazole and its sorption behavior for Pd(II), Pt(IV), and Au(III)

✍ Scribed by Rongjun Qu; Changmei Sun; Chunnuan Ji; Chunhua Wang; Qiang Xu; Shulai Lu; Changfeng Li; Gang Xu; Guoxiang Cheng

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 118 KB
• Volume: 101
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.23598

✦ Synopsis

Abstract

A type of chelating resin crosslinking polystyrene‐supported 2,5‐dimercapto‐1,3,4‐thiodiazole (also called bismuththiol I, BMT), containing sulfur and nitrogen atoms, was prepared. The structure of PS‐BMT was confirmed by FTIR, elemental analysis, and X‐ray photoelectron spectroscopy (XPS). Adsorption of Pd(II), Pt(IV), and Au(III) was investigated. The capacity of PS‐BMT to adsorb Pd(II) and Pt(IV) was 0.190 and 0.033 mmol/g, respectively. The adsorption dynamics of Pd(II) showed that adsorption was controlled by liquid film diffusion and that the apparent activation energy, E~a~, was 32.67 kJ/mol. The Langmuir model was better than the Freundlich model in describing the isothermal process of Pd(II), and the Δ__G,__ Δ__H,__ and Δ__S__ values calculated were −0.33 kJ/mol, 26.29 kJ/mol, and 87.95 J mol^−1^ K^−1^, respectively. The mechanisms of adsorption of Pd(II), Pt(IV), and Au(III) were confirmed by XPS. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 631–637, 2006