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Removing THMs From Drinking Water Using High-Energy Electron-Beam Irradiation

William J. Cooper, EvaMaria Cadavid, Michael G. Nickelsen, Kaijun Lin, Charles N. Kurucz and Thomas D. Waite
Journal (American Water Works Association)
Vol. 85, No. 9, Water Treatment Laboratories (SEPTEMBER 1993), pp. 106-112
Stable URL: http://www.jstor.org/stable/41294372
Page Count: 7
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Removing THMs From Drinking Water Using High-Energy Electron-Beam Irradiation
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Abstract

High-energy electron-beam irradiation was shown to be efficient for removing trihalomethanes (THMs) from drinking water. The process was demonstrated on a 1.5-MeV variable-current (0-50 mA) electron-beam system at a flow rate of 120 gpm and on a ⁶⁰Co gamma source. Of the four THMs, chloroform was the most difficult, i.e., energy-intensive, to remove. The brominated THMs were much more efficiently destroyed by the process. Organically bound halogens were converted to halide anions, and no organic halogen or oxyhalogen reaction by-products were observed. Se demuestra que la irradiación con un rayo de electrones de alta energía es un proceso de tratamiento eficiente para remover los trihalometanos (THMs) del agua potable. El proceso fué demostrado en un sistema de rayos de electrones con una corriente variable de 1.5 MeV (0-50 mA) con una velocidad de flujo de 120 gpm y con una fuente de ⁶⁰Co gamas. De los cuatro trihalometanos, el cloroformo fue el más difícil de remover—por ej., en intensidad de energía—de todos los THMs. Los THMs brominados fueron destruídos más eficientemente con este proceso. Halógenos ligados orgánicamente fueron convertidos en aniones salinos, y no se observaron halógenos orgánicos o subproductos de la reacción oxihalogénica.

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