Full Text:
<2821>
CLC number: TQ150.9; O646.5; X783
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 0000-00-00
Cited: 7
Clicked: 5296
Degradation of chlorophenol by in-situ electrochemically generated oxidant
| |||||||||||||
CONG Yan-qing, WU Zu-cheng, YE Qian, TAN Tian-en. Degradation of chlorophenol by in-situ electrochemically generated oxidant[J]. Journal of Zhejiang University Science A, 2004, 5(2): 180-185.
@article{title="Degradation of chlorophenol by in-situ electrochemically generated oxidant",
author="CONG Yan-qing, WU Zu-cheng, YE Qian, TAN Tian-en",
journal="Journal of Zhejiang University Science A",
volume="5",
number="2",
pages="180-185",
year="2004",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2004.0180"
}
%0 Journal Article
%T Degradation of chlorophenol by in-situ electrochemically generated oxidant
%A CONG Yan-qing
%A WU Zu-cheng
%A YE Qian
%A TAN Tian-en
%J Journal of Zhejiang University SCIENCE A
%V 5
%N 2
%P 180-185
%@ 1869-1951
%D 2004
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2004.0180
TY - JOUR
T1 - Degradation of chlorophenol by in-situ electrochemically generated oxidant
A1 - CONG Yan-qing
A1 - WU Zu-cheng
A1 - YE Qian
A1 - TAN Tian-en
J0 - Journal of Zhejiang University Science A
VL - 5
IS - 2
SP - 180
EP - 185
%@ 1869-1951
Y1 - 2004
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2004.0180
Abstract: A novel in-situ electrochemical oxidation method was applied to the degradation of wastewater containing chlorophenol. Under oxygen sparging, the strong oxidant, hydrogen dioxide, could be in-situ generated through the reduction of oxygen on the surface of the cathode. The removal rate of chlorophenol could be increased 149% when oxygen was induced in the electrochemical cell. The promotion factor was estimated to be about 82.63% according to the pseudo-first-order reaction rate constant (min-1). Important operating parameters such as current density, sparged oxygen rate were investigated. Higher sparged oxygen rate could improve the degradation of chlorophenol. To make full use of oxygen, however, sparged oxygen rate of 0.05 m3/h was adopted in this work. Oxidation-reduction potential could remarkably affect the generation of hydrogen peroxide. It was found that the removal rate of chlorophenol was not in direct proportion to the applied current density. The optimum current density was 3.5 mA/cm2 when initial chlorophenol concentration was 100 mg/L and sparged oxygen rate was 0.05 m3/h.
[1] APHA, AWWA, WEF, 1995. Standard Methods for Water and Wastewater Examination. Washington DC, p.515-516.
[2] Casero, I., Sicilia, D., Rubio, S., Perez-Bendito, D., 1997. Chemical degradation of aromatic amines by Fenton's reagent.Wat. Res.,31:1985-1995.
[3] Comninellis, C., Nerini, A., 1995. Anodic oxidation of phenol in the presence of NaCl for wastewater treatment.J. Appl. Electrochem.,25(1):23-28.
[4] Gau, S.H., Chang, F.S., 1996. Improved fenton method to remove recalcitrant organics in landfill leachate.Wat. Sci. Technol.,34:455-462.
[5] Juttner, K., Galla, U., Schmieder, H., 2000. Electrochemical approaches to environmental problems in the process industry.Electrochimi. Acta,45:2575-2594.
[6] Tahar, N.B., Savall, A.J., 1998. Mechanistic aspects of phenol electorchemical degradation by oxidation by oxidation on a Ta/PbO2anode.J. Electrochem. Soc.,145:3427-3434.
[7] Wu, Z.C., Zhou, M.H., 2001. Partial degradation of phenol by advanced electrochemical oxidation process.Environ. Sci. Technol.,35:2698-2703.
[8] Wu, Z.C., Cong, Y.Q., Zhou, M.H., Ye, Q., Tan, T.E., 2002a. Removal of phenolic compounds by electro-assisted advanced process for wastewater purification.Korean J. Chem. Eng.,19:866-870.
[9] Wu, Z.C., Zhou, M.H., Huang, Z.W., Wang, D.H., 2002b. Electrocatalysis method for wastewater treatment using a novel beta-lead dioxide anode.J. Zhejiang University SCIENCE,3:194-198.
Open peer comments: Debate/Discuss/Question/Opinion
<1>