Sonoelectrochemical treatment of water polluted with trichloroacetic acid: From sonovoltammetry to pre-pilot plant scale

M. D. Esclapez, V. Sáez, D. Milán-Yáñez, I. Tudela, O. Louisnard, J. González-García*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The sonoelectrochemical treatment of aqueous solutions of trichloroacetic acid (TCAA) has been scaled-up from the voltammetric analysis to pre-pilot stage. The degradation in absence of ultrasound field has yield to a poor performance which has been improved in presence of ultrasound. The sonovoltametry study has provided the range of potentials and/or current densities to be used with the lowest current efficiency penalty. Sonoelectrolyses at batch scale (carried out with a horn-transducer 24 kHz positioned at about 3 cm from the surface of the electrode) achieved little improvement in the degradation. However, when a specifically designed sonoelectrochemical reactor (not optimized) was used during the scale-up, the presence of ultrasound field provided better results (fractional conversion 97%, degradation efficiency 26%, selectivity 0.92 and current efficiency 8%) at lower ultrasonic intensities and volumetric flow.

Original languageEnglish
Pages (from-to)1010-1020
Number of pages11
JournalUltrasonics Sonochemistry
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Aug 2010
Externally publishedYes

Keywords

  • Cavitation
  • Current distribution
  • Electrocatalysis
  • Electrochemistry
  • Fluid flow
  • Ultrasound

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