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

Reduction of chromium(VI) ions from aqueous solutions by using the solvent impregnated resin
File Size:
91.92 kB
Author:
Grzegorz Wójcik, Zbigniew Hubicki
Email:
grzegorzwojcikumcs[at]wp[dot]pl
Date:
13 August 2013
Downloads:
3 x

 

Abstract: The solvent impregnated resins enables eff ective 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. Th e values of recovery factors of chromium(VI) are higher at low pH than in neutral solution. Th e 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. Th e prepared SIR is a new sorbent used for recovery of chromium ions from wastewaters.

Keywords: sorption of chromium(VI) ions, reduction

Area: Natural Science

BibTeX:

@article{Wojcik2011a,
  author = {Grzegorz Wójcik and Zbigniew Hubicki},
  title = {Reduction of chromium(VI) ions from aqueous solutions by using the solvent impregnated resin},
  journal = {Challenges of Modern Technology},
  year = {2011},
  volume = {2},
  number = {3},
  pages = {41--43},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/51-reduction-of-chromium-vi-ions-from-aqueous-solutions-by-using-the-solvent-impregnated-resin}
}
 
 

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