The combination of photocatalysis and ozonolysis as a new approach for cleaning 2,4-dichlorophenoxyaceticacid polluted water.
Treatment of 2,4-D polluted waters with photocatalysis leads to the buildup of high concentrations of the long living intermediate 2,4-DCP. A new approach using a combination of ozonolysis and photocatalysis gave better degradation results with lower intermediate concentrations. The advantages of photocatalysis giving a constant decline in TOC and of ozonolysis giving no buildup of high intermediate concentrations were combined. Degradation data of 2,4-D for photocatalysis, ozonolysis and the combination of both for different pH ranges are given. Data on the main intermediate 2,4-DCP are given for the three different approaches.
Müller
T S
TS
Yokohama National University, Institute of Environmental Science and Technology, Yokohama, Japan.
Sun
Z
Z
Kumar
G
G
Itoh
K
K
Murabayashi
M
M
D015084:2,4-Dichlorophenoxyacetic Acid / Q000737:chemistry*; D002384:Catalysis; D002733:Chlorophenols / Q000032:analysis / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008027:Light; D010126:Ozone / Q000737:chemistry*; D010777:Photochemistry; D014873:Water Pollutants / Q000032:analysis; D014876:Water Pollution / Q000517:prevention & control*
D002733:Chlorophenols; D014873:Water Pollutants; D015084:2,4-Dichlorophenoxyacetic Acid; D010126:Ozone; C004762:2,4-dichlorophenol