Reduction of chromium(VI) ions from aqueous solutions by using the solvent impregnated resin

• Autorzy: Wójcik G. , Hubicki Z.
• Języki publikacji: EN

Abstrakty

EN

The solvent impregnated resins enables effective recovery of microquantities of chromium(VI) ions from wastewaters. The solvent impregnated resin (SIR) Amberlite XAD 7 HP as polymer matrix has been prepared by the wet-impregnation technique. Aliquat 336 was employed as the extractant and acetone as the solvents for impregnation. Sorption of chromium(VI) was investigated in the batch process . Sorption of chromium(VI) was studied in the pH range from 1.5 to 7. It was stated that sorption of chromium(VI) ions depends on acidity of solution. The values of recovery factors of chromium(VI) are higher at low pH than in neutral solution. The speciation of chromium was investigated in the studied pH range. Reduction of chromium(VI) to chromium(III) under acidic conditions was observed. Chromium was determined by using the spectrophotometric and atomic absorption spectroscopy methods. Both methods permit to observe changing of valence of chromium(III) and (VI) oxidation states. The prepared SIR is a new sorbent used for recovery of chromium ions from wastewaters.

Słowa kluczowe

EN

sorption of chromium(VI) ions; reduction

• Wydawca: Foundation for Young Scientists
• Czasopismo: Challenges of Modern Technology
• Rocznik: 2011
• Tom: Vol. 2, no. 3
• Strony: 41--43
• Opis fizyczny: Bibliogr. 5 poz., rys., wykr., tab.

Twórcy

autor

Wójcik G.

• University of Maria Curie-Sklodowska Faculty of Chemistry, Department of Inorganic Chemistry, Pl. M. Curie-Sklodowskiej 2, 20-031, Lublin, Poland

autor

Hubicki Z.

Bibliografia

• [1] Senol, A. “Amine extraction of chromium (VI) from aqueous acidic solutions”. Sep. & Pur. Tech. 36 (2004): 63–75.
• [2] Trochimczuk, A.W., et al. “Stabilization of solvent impregnated resins (SIRs) by coating with water soluble polymers and chemical crosslinking”. Reac.& Funct. Polym. 59 (2004): 1–7.
• [3] Kabay, N., et al. “Removal of chromate by solvent impregnated resins (SIRs) stabilized by coating and chemical crosslinking. I. Batch-mode sorption studies”. Reac.& Funct. Polym. 59 (2004): 9–14.
• [4] Kabay, N., et al. “Removal of chromate by solvent impregnated resins (SIRs) stabilized by coating and chemical crosslinking. II. Column-mode sorption/elution studies”. Reac.& Funct. Polym. 59 (2004): 15–22.
• [5] Wójcik, G., Z. Hubicki, and J. Ryczkowski. “Investigations of chromium (III) and (VI) Ions Sorption on SIR by using Photoacoustic and DRS Methods”. Acta Phys. Polon. A 166 (2009): 432–434.