Degradation of 1-butyl-3-methylimidazolium chloride ionic liquid in a Fenton-like system.
The study examined the usefulness of a Fenton-like system for the degradation of ionic liquid residues in water. The ionic liquid was oxidized in a dilute aqueous solution of 1-butyl-3-methylimidazolium chloride (bmimCl). The ionic liquid decomposes readily and rapidly in aqueous solution by chemical degradation in a Fenton-like system. Under chosen conditions the initial bmimCl solution was reduced by a factor of 0.973 within 90 min. Additional results showed that bmimCl degradations in a Fenton-like system in excess H2O2 could be interpreted as a combined oxidation-reduction mechanism. Preliminary investigations of the mechanism of such degradations have indicated that initial OH* radicals can attack any one of the three carbon atoms on the imidazolium ring. The intermediates of this reaction may be mono- di- or amino- carboxylic acids.
Siedlecka
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EM
Faculty of Chemistry, University of Gdańsk, ul. Sobieskiego 18, PL-80-952 Gdańsk, Poland.
Mrozik
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W
Kaczyński
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Z
Stepnowski
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P
D002264:Carboxylic Acids / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D002264:Carboxylic Acids; D007093:Imidazoles; D016877:Oxidants; D014874:Water Pollutants, Chemical; C502841:1-butyl-3-methylimidazolium chloride; D006861:Hydrogen Peroxide; D007501:Iron