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Decolourisation of dyes and dyehouse effluent in a bubble‐column reactor by ozonation in the presence of H 2 O 2 , KMnO 4 or Ferral
Author(s) -
Hassan Mohammad M,
Hawkyard Christopher J,
Barratt Peter A
Publication year - 2006
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1373
Subject(s) - potassium permanganate , hydrogen peroxide , chemistry , aqueous solution , effluent , bubble column reactor , catalysis , permanganate , ozone , dyeing , nuclear chemistry , bleach , inorganic chemistry , bubble , organic chemistry , environmental engineering , gas bubble , computer science , engineering , parallel computing
The decolourisation of aqueous solutions of dyes by ozonation in the presence of hydrogen peroxide, potassium permanganate or Ferral using a bubble column reactor was investigated. Addition of hydrogen peroxide in the ozonation reaction of dyes did not affect its decolourisation efficiency. The addition of potassium permanganate considerably increased the decolourisation efficiency during ozonation of all of the dyes studied. Ferral showed excellent catalytic activity under acidic conditions but in alkaline conditions its catalytic activity diminished. The effect of the ozonation on COD was also monitored and was found to be highly effective in reducing the COD of aqueous dye solutions. In addition to studying the effect of addition of hydrogen peroxide, potassium permanganate or Ferral on the ozonation of aqueous solutions of individual dyes, tests were carried out on effluent from a commercial dyeing unit. Copyright © 2005 Society of Chemical Industry