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

doi:10.1016/j.ultsonch.2009.11.009

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 journal › Article › peer-review

Abstract / Description of output

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 language	English
Pages (from-to)	1010-1020
Number of pages	11
Journal	Ultrasonics Sonochemistry
Volume	17
Issue number	6
DOIs	https://doi.org/10.1016/j.ultsonch.2009.11.009
Publication status	Published - 1 Aug 2010
Externally published	Yes

Keywords / Materials (for Non-textual outputs)

Cavitation
Current distribution
Electrocatalysis
Electrochemistry
Fluid flow
Ultrasound

Access to Document

10.1016/j.ultsonch.2009.11.009

Cite this

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

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.",

keywords = "Cavitation, Current distribution, Electrocatalysis, Electrochemistry, Fluid flow, Ultrasound",

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T2 - From sonovoltammetry to pre-pilot plant scale

AU - Esclapez, M. D.

AU - Sáez, V.

AU - Milán-Yáñez, D.

AU - Tudela, I.

AU - Louisnard, O.

AU - González-García, J.

PY - 2010/8/1

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N2 - 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.

AB - 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.

KW - Cavitation

KW - Current distribution

KW - Electrocatalysis

KW - Electrochemistry

KW - Fluid flow

KW - Ultrasound

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JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

IS - 6

ER -

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

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

Access to Document

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