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AWWA ACE61599
- Degradation Dynamics of Microcystins by UV-microO3 Reactor
- Conference Proceeding by American Water Works Association, 06/17/2005
- Publisher: AWWA
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Microcystins (MC) are strongly linked to liver tumors. The degradation dynamics andcharacteristics of MC in an UV-microO<sub>3</sub> reactor with low concentration ozone generated from dry airby UV-radiation are discussed. The results showed that the photochemical degradationof MC was characterized by pseudo-first order reaction kinetics. The reaction half lives (t<sub>1/2</sub>) for MCRR,MC-YR and MC-LR were 74.5 min, 32.2 min and 24.2 min respectively. The MC degradationwasn't affected by original concentration of MC in the water; however, it was decelerated by natural organic matter (NOM) inthe water. In the UV-microO<sub>3</sub> process, the decrease in MC concentration was due to the destruction ofthe conjugated double bond on the Adda side chain by hydroxyl radicals. The UV-microO<sub>3</sub> process canbe used for the decomposition of MC in potable water. Includes 10 references, table, figures.
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