TY - JOUR
T1 - Synergistic sonoelectrochemical removal of substituted phenols
T2 - Implications of ultrasonic parameters and physicochemical properties
AU - Kim, Kyungho
AU - Cho, Eunju
AU - Thokchom, Binota
AU - Cui, Mingcan
AU - Jang, Min
AU - Khim, Jeehyeong
N1 - Funding Information:
This work was supported by the Mid-Career Researcher Program (2009-0092799) through an NRF grant funded by the Ministry of Education, Science and Technology (MEST).
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/5
Y1 - 2015/5
N2 - The effects of ultrasonic conditions and physicochemical properties on the synergistic degradation in synthetic solution were investigated. A wide range of ultrasound frequencies, including 35, 170, 300, 500 and 700 kHz, and ultrasonic power densities, including 11.3, 22.5 and 31.5 W/L were used. It was revealed that the physical effect of ultrasound plays a major role in synergistic mechanism and 35 kHz was found to be the most effective frequency due to its more vigorous physical effect induced by high implosive energy released from collapse of cavitation bubbles. The highest ultrasonic power density (31.5 W/L) showed the highest synergy index as it increases the number of cavitation bubbles and the energy released when they collapse. The synergy indexes of various substituted phenols under identical condition were investigated. These results were correlated with physicochemical properties, namely octanol-water partition coefficient (Log KOW), water solubility (SW), Henry's law constant (KH) and water diffusivity (DW). Among these parameters, Log KOW and DW were found to have substantial effects on synergy indexes.
AB - The effects of ultrasonic conditions and physicochemical properties on the synergistic degradation in synthetic solution were investigated. A wide range of ultrasound frequencies, including 35, 170, 300, 500 and 700 kHz, and ultrasonic power densities, including 11.3, 22.5 and 31.5 W/L were used. It was revealed that the physical effect of ultrasound plays a major role in synergistic mechanism and 35 kHz was found to be the most effective frequency due to its more vigorous physical effect induced by high implosive energy released from collapse of cavitation bubbles. The highest ultrasonic power density (31.5 W/L) showed the highest synergy index as it increases the number of cavitation bubbles and the energy released when they collapse. The synergy indexes of various substituted phenols under identical condition were investigated. These results were correlated with physicochemical properties, namely octanol-water partition coefficient (Log KOW), water solubility (SW), Henry's law constant (KH) and water diffusivity (DW). Among these parameters, Log KOW and DW were found to have substantial effects on synergy indexes.
KW - Frequency
KW - Physicochemical properties
KW - Power density
KW - Sonoelectrochemical treatment
KW - Synergistic effect
UR - http://www.scopus.com/inward/record.url?scp=84922422363&partnerID=8YFLogxK
U2 - 10.1016/j.ultsonch.2014.11.004
DO - 10.1016/j.ultsonch.2014.11.004
M3 - Article
AN - SCOPUS:84922422363
SN - 1350-4177
VL - 24
SP - 172
EP - 177
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
ER -