Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9451895 | Chemosphere | 2005 | 7 Pages |
Abstract
The investigation presented here focussed on the electrochemical decolourisation of a commercial, textile indigo dye, in an undivided electrochemical cell using graphite electrodes. The decolourisation values obtained employing halide salts-sodium chloride, potassium bromide and potassium iodide-and a reductive agent-sodium meta-bisulphite-as electrolytes are higher than those attained when no electrolyte was used. The highest decolourisation value at a low level of electric power consumption was obtained with sodium chloride. Besides, this electrolyte is usually found in the coloured wastewaters of textile industry. Thus, a detailed study was carried out to determine the influence of electrolyte-sodium chloride-and dye concentration on the efficiency of the process expressed in terms of energy consumption and extension of the decolourisation reaction. The scale-up of the treatment with sodium chloride was satisfactorily tested in a 20Â l cell.
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Authors
C. Cameselle, M. Pazos, M.A. Sanromán,