Synthesis and characterization of polyacrylonitrile-thiosemicarbazide resin and its sorption behavior for Rh(III) Ru(IV) Pd(II) and Ir(IV) ions

✍ Scribed by Yi-Yong Chen; Chao Liang; Yan Chao

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 619 KB
• Volume: 36
• Category: Article
• ISSN: 1381-5148
• DOI: 10.1016/s1381-5148(97)00111-9

✦ Synopsis

Polyacrylonitrile-thiosemicarbazide resin (PAN-TSC) bearing a triazolthione functional group was synthesized from crosslinked polyacrylonitrile and thiosemicarbazide. The functional group capacity and percentage conversion of the functional group of PAN-TSC prepared under optimum conditions were 4.39 mm01 FG/g and 39.04%. respectively. The structure of PAN-TSC was confirmed by IR, elemental analysis, and X-ray photoelectron spectroscopy (XPS). The sorption capacities of PAN-TSC for Rh(III), Ru(IV), Pd(II), and Ir(IV) were 82.7, 239.7, 430.8, and 417.0 mg/g resin, respectively. The distribution coefficients were 1.30 x 104-4.07 x lo5 (ml/g). PAN-TSC resin has excellent sorption selectivity for Rh(III), Ru(IV) and Ir(IV) in the presence of common metal ions over a wide acidity range. The apparent activation energy (E,) of sorption of PAN-TSC for Ru(IV) is 43 f 4 kJ/mol. The sorption mechanism of PAN-TSC resin for Ru(IV) was confirmed by XPS.