TY - JOUR
T1 - 20kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media
T2 - Influence of the operational variables in batch mode
AU - Sáez, Verónica
AU - Esclapez, María Deseada
AU - Tudela, Ignacio
AU - Bonete, Pedro
AU - Louisnard, Olivier
AU - González-García, José
PY - 2010/11/1
Y1 - 2010/11/1
N2 - 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.
AB - 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.
KW - Chlorinated compounds
KW - Dechlorination
KW - Groundwater
KW - Perchloroethylene
KW - Sonoelectrochemistry
UR - http://www.scopus.com/inward/record.url?scp=77956449007&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2010.07.074
DO - 10.1016/j.jhazmat.2010.07.074
M3 - Article
C2 - 20705391
AN - SCOPUS:77956449007
SN - 0304-3894
VL - 183
SP - 648
EP - 654
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-3
ER -