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AWWA ACE58193
- Inactivation of Microcystin-LR by Free Chlorine in Drinking Water Treatment
- Conference Proceeding by American Water Works Association, 06/15/2003
- Publisher: AWWA
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Microcystin-LR (MLR) has been identified in source and treated drinking waters in the U.S. andCanada. Chlorine is used by more than 95% of the medium and large water utilities and as aresult would be easily accessible if CT values were developed for chlorination of MLR. Sevenbatch experiments were conducted to determine the interaction of MLR and free chlorine at 10Cat pH values from 6 to 9 over 100 minutes of contact time. Samples were analyzed by enzyme-linkedimmunosorbent assay (ELISA). Inactivation of MLR increased as pH decreased and asthe free chlorine concentration increased. Complete inactivation of MLR was not found, butconcentrations near the detection limit of ELISA were observed in several cases. Includes 40 references, tables, figures.
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