TY - JOUR
T1 - Electro-peroxone treatment of Orange II dye wastewater
AU - Bakheet, Belal
AU - Yuan, Shi
AU - Li, Zhaoxin
AU - Wang, Huijiao
AU - Zuo, Jiane
AU - Komarneni, Sridhar
AU - Wang, Yujue
N1 - Funding Information:
This research is supported by a grant from the special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control ( 13Y01ESPCT ) and the National Special Program of Water Pollution Control and Management (No. 2012ZX07301-005 and No. 2012ZX07205-001 ).
PY - 2013/10/15
Y1 - 2013/10/15
N2 - Degradation of a synthetic azo dye, Orange II, by electro-peroxone (E-peroxone) treatment was investigated. During the E-peroxone process, ozone generator effluent (O2 and O3 gas mixture) was continuously sparged into an electrolysis reactor, which was equipped with a carbon-polytetrafluorethylene (carbon-PTFE) cathode to electrochemically convert the sparged O2 to H2O2. The in-situ generated H2O2 then reacted with the sparged O3 to produce •OH, which can oxidize ozone-refractory organic pollutants effectively. Thus, by simply combining conventional ozonation and electrolysis processes, and using a cathode that can effectively convert O2 to H2O2, the E-peroxone process degraded Orange II much more effectively than the two processes individually. Complete decolorization and 95.7% total organic carbon (TOC) mineralization were obtained after 4 and 45min of the E-peroxone treatment, respectively. In comparison, only 55.6 and 15.3% TOC were mineralized after 90min of the individual ozonation and electrolysis treatments, respectively. In addition to its high efficiency, the E-peroxone process was effective over a wide range of pH (3-10) and did not produce any secondary pollutants. The E-peroxone process can thus provide an effective and environmentally-friendly alternative for wastewater treatment.
AB - Degradation of a synthetic azo dye, Orange II, by electro-peroxone (E-peroxone) treatment was investigated. During the E-peroxone process, ozone generator effluent (O2 and O3 gas mixture) was continuously sparged into an electrolysis reactor, which was equipped with a carbon-polytetrafluorethylene (carbon-PTFE) cathode to electrochemically convert the sparged O2 to H2O2. The in-situ generated H2O2 then reacted with the sparged O3 to produce •OH, which can oxidize ozone-refractory organic pollutants effectively. Thus, by simply combining conventional ozonation and electrolysis processes, and using a cathode that can effectively convert O2 to H2O2, the E-peroxone process degraded Orange II much more effectively than the two processes individually. Complete decolorization and 95.7% total organic carbon (TOC) mineralization were obtained after 4 and 45min of the E-peroxone treatment, respectively. In comparison, only 55.6 and 15.3% TOC were mineralized after 90min of the individual ozonation and electrolysis treatments, respectively. In addition to its high efficiency, the E-peroxone process was effective over a wide range of pH (3-10) and did not produce any secondary pollutants. The E-peroxone process can thus provide an effective and environmentally-friendly alternative for wastewater treatment.
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U2 - 10.1016/j.watres.2013.07.042
DO - 10.1016/j.watres.2013.07.042
M3 - Article
C2 - 23973257
AN - SCOPUS:84885372242
VL - 47
SP - 6234
EP - 6243
JO - Water Research
JF - Water Research
SN - 0043-1354
IS - 16
ER -