Back to Search
Start Over
Enhanced mineralization of 2,4‐dichlorophenol by ozone in the presence of trace permanganate: effect of pH
- Source :
- Environmental Technology. 31:1295-1300
- Publication Year :
- 2010
- Publisher :
- Informa UK Limited, 2010.
-
Abstract
- Ozonation of 2,4‐dichlorophenol (DCP) in the presence of permanganate has been investigated at various levels of pH. Compared with only 40% in single ozonation, by catalytic ozonation the total organic carbon removal efficiency reached almost 95%. It has been shown that the addition of 0.5 mg L−1 MnO4 − (based on manganese content) greatly accelerated the mineralization of DCP when the initial pH was below 8.5. Under these conditions MnO4 − was reduced to Mn2+, which enabled homogeneous catalysis to take place. When the initial pH was above 10.1, the MnO4 − was reduced to MnO2, which did not promote mineralization of DCP by ozone under either neutral or alkaline conditions. Under acidic conditions, however, the addition of MnO2 greatly enhanced DCP mineralization, the mechanism being that MnO2 was reduced to Mn2+ which is a highly effective homogeneous catalyst for ozonation.
- Subjects :
- Manganese
Ozone
Permanganate
Inorganic chemistry
2,4-Dichlorophenol
chemistry.chemical_element
Oxides
Homogeneous catalysis
General Medicine
Mineralization (soil science)
Hydrogen-Ion Concentration
Catalysis
chemistry.chemical_compound
Manganese Compounds
chemistry
Environmental Chemistry
Water treatment
Waste Management and Disposal
Chlorophenols
Water Science and Technology
Subjects
Details
- ISSN :
- 1479487X and 09593330
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Environmental Technology
- Accession number :
- edsair.doi.dedup.....cbdb1d5fad11b44961b444c16080fa7b