20kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media: Influence of the operational variables in batch mode

A preliminary study of the 20kHz sonoelectrochemical degradation of perchloroethylene in aqueous sodium sulfate has been carried out using controlled current density degradation sonoelectrolyses in batch mode. An important improvement in the viability of the sonochemical process is achieved when the...

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Veröffentlicht in:	Journal of hazardous materials 2010-11, Vol.183 (1-3), p.648-654
Hauptverfasser:	Saez, Veronica, Esclapez, Maria Deseada, Tudela, Ignacio, Bonete, Pedro, Louisnard, Olivier, Gonzalez-Garcia, Jose
Format:	Artikel
Sprache:	eng
Schlagworte:	Conversion Current efficiency Degradation Perchloroethylene Sodium sulfates Speciation Trichloroethylene Ultrasound Volatile compounds
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creator	Saez, Veronica Esclapez, Maria Deseada Tudela, Ignacio Bonete, Pedro Louisnard, Olivier Gonzalez-Garcia, Jose
description	A preliminary study of the 20kHz sonoelectrochemical degradation of perchloroethylene in aqueous sodium sulfate has been carried out using controlled current density degradation sonoelectrolyses in batch mode. An important improvement in the viability of the sonochemical process is achieved when the electrochemistry is implemented, but the improvement of the electrochemical treatment is lower when the 20kHz ultrasound field is simultaneously used. A fractional conversion of 100% and degradation efficiency around 55% are obtained independently of the ultrasound power used. The current efficiency is also enhanced compared to the electrochemical treatment and a higher speciation is also detected; the main volatile compounds produced in the electrochemical and sonochemical treatment, trichloroethylene and dichloroethylene, are not only totally degraded, but also at shorter times than in the sonochemical or electrochemical treatments.
doi_str_mv	10.1016/j.jhazmat.2010.07.074
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subjects	Conversion Current efficiency Degradation Perchloroethylene Sodium sulfates Speciation Trichloroethylene Ultrasound Volatile compounds
title	20kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media: Influence of the operational variables in batch mode
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