Water decolorization using UV radiation and hydrogen peroxide: a kinetic study.
Sometimes, provision of water for domiciliary consumption faces the problem of natural contamination originated by the presence of organic substances such as humic or fulvic acids. Very often, after conventional sanitary treatments this water exhibits a persistent yellowish coloration that affects its use. Moreover, these substances may act as precursors of tri-halomethanes formation during pre-disinfection with chlorine. This paper presents, with a simplified mechanistic approach, the intrinsic reaction kinetics of natural water decolorization employing UV radiation and hydrogen peroxide. The main variables for the model are: contaminant concentration expressed as TOC, hydrogen peroxide concentration and the photon absorption rate.
Martin
C A
CA
INTEC, Univ Nac del Litoral, CONICET, Santa Fe, Argentina.
Alfano
O M
OM
Cassano
A E
AE
D004396:Coloring Agents / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D016877:Oxidants / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical; D014876:Water Pollution / Q000517:prevention & control
D004396:Coloring Agents; D016877:Oxidants; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide