TY - JOUR
T1 - Towards the complete dechlorination of chloroacetic acids in water by sonoelectrochemical methods
T2 - Effect of the anodic material on the degradation of trichloroacetic acid and its by-products
AU - Esclapez, María Deseada
AU - Tudela, Ignacio
AU - Díez-García, María Isabel
AU - Sáez, Verónica
AU - Rehorek, Astrid
AU - Bonete, Pedro
AU - González-García, José
PY - 2012/7/15
Y1 - 2012/7/15
N2 - The total dechlorination of chloroacetic acids in aqueous solutions has been achieved using high-frequency sonoelectrochemical methods. Compared to previous studies, the sonoelectrochemical degradation efficiency was found to be dependent on the ultrasonic frequency and electrodes used. Fractional conversions for trichloroacetic acid and its chlorinated by-products higher than 95% and degradation efficiencies higher than 50% were achieved in all cases where high-frequency sonoelectrochemical experiments were conducted in absence of a background electrolyte. The best results were obtained using lead dioxide as anode and steel as cathode, where both the fractional conversion and degradation efficiency resulted higher than 99.5%. The use of the electricity as unique reactant and the appearing mineralization of the trichloroacetic acids and its by-products make the sonoelectrochemical technology a serious alternative to current technologies.
AB - The total dechlorination of chloroacetic acids in aqueous solutions has been achieved using high-frequency sonoelectrochemical methods. Compared to previous studies, the sonoelectrochemical degradation efficiency was found to be dependent on the ultrasonic frequency and electrodes used. Fractional conversions for trichloroacetic acid and its chlorinated by-products higher than 95% and degradation efficiencies higher than 50% were achieved in all cases where high-frequency sonoelectrochemical experiments were conducted in absence of a background electrolyte. The best results were obtained using lead dioxide as anode and steel as cathode, where both the fractional conversion and degradation efficiency resulted higher than 99.5%. The use of the electricity as unique reactant and the appearing mineralization of the trichloroacetic acids and its by-products make the sonoelectrochemical technology a serious alternative to current technologies.
KW - Chloroacetic acids
KW - Dechlorination
KW - Lead dioxide
KW - Mineralization
KW - Sonoelectrochemistry
UR - http://www.scopus.com/inward/record.url?scp=84863228820&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2012.05.031
DO - 10.1016/j.cej.2012.05.031
M3 - Article
AN - SCOPUS:84863228820
SN - 1385-8947
VL - 197
SP - 231
EP - 241
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -