20 kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media: influence of the operational variables in batch mode.
A preliminary study of the 20 kHz 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 20 kHz 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.
Sáez
Verónica
V
Grupo de Nuevos Desarrollos Tecnológicos en Electroquímica: Sonoelectroquímica y Bioelectroquímica, Ap. Correos 99, 03080 Alicante, Spain.
Esclapez
María Deseada
MD
Tudela
Ignacio
I
Bonete
Pedro
P
Louisnard
Olivier
O
González-García
José
J
D002273:Carcinogens; D004572:Electrolysis / Q000379:methods*; D004785:Environmental Pollutants / Q000737:chemistry; D012996:Solutions; D013431:Sulfates; D013750:Tetrachloroethylene / Q000737:chemistry*; D014465:Ultrasonics / Q000379:methods*; D014867:Water
D002273:Carcinogens; D004785:Environmental Pollutants; D012996:Solutions; D013431:Sulfates; D014867:Water; C012036:sodium sulfate; D013750:Tetrachloroethylene