Sorption and preconcentration of metal ions on silica gel modified with 2,5-dimercapto-1,3,4-thiadiazole
✍ Scribed by Pedro Lessi; Newton L.Dias Filho; JoséC. Moreira; Joaquim T.S. Campos
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 564 KB
- Volume
- 327
- Category
- Article
- ISSN
- 0003-2670
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## Abstract The accumulation voltammetry of mercury(II) was investigated at a carbon paste electrode chemically modified with silica gel functionalized with 2,5‐dimercapto‐1,3,4‐thiadiazole (DTTPSG‐CPE). The repetitive cyclic voltammogram of mercury(II) solution in the potential range −0.2 to +0.8
The isotherms of adsorption of CuX2 (X = Cl-, Br-, ClO-4) by silica gel chemically modified with 5-amino-1,3,4-thiadiazole-2-thiol were studied in acetone and ethanol solutions, at 25 degreesC. The following equilibria constants (in L mol-1) were determined: (a) CuCl2, 3.2 x 10(3) (ac), 2.5 x 10(3)