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Ultrasonic decolorization of bromocresol green

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Summary

Ultrasonic radiations from aMullard generator with barium titanate crystal as transducer having a frequency 1 Mc/sec, have been used to study the decolorization of an aqueous solution of bromocresol green. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. The presence of small amount of ethyl alcohol, n-propyl alcohol, n-butyl alcohol, diacetone alcohol and acetone separately inhibit the fading. Cavitation seems to be the cause of decolorization.

Zusammenfassung

Ultraschallbestrahlung mit einemMullard-Generator und Bariumtitanatkristall als Übertrager (1 MHz) diente zur Beobachtung der Entfärbung wäßriger Bromkresolgrünlösungen. Die mikroskopischen Adsorptionskurven zeigen das Verschwinden der Farbe mit der Zeit an. Gegenwart geringer Beträge von Äthylalkohol, n-Propylalkohol, n-Butylalkohol, Diaceton, Alkohol und Aceton stoppen die Verfärbung. Ursache scheint Kavitation zu sein.

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Author notes

  1. Sheo Prakash &  Satya Prakash

    Present address: Chemical Laboratories, University of Allahabad, Allahabad, India

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    1. Sheo Prakash
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    2. Satya Prakash
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    Prakash, S., Prakash, S. Ultrasonic decolorization of bromocresol green. Kolloid-Z.u.Z.Polymere 188, 59–61 (1963). https://doi.org/10.1007/BF01499606

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    • DOI: https://doi.org/10.1007/BF01499606

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