Kinetic modeling of trichloroethylene and carbon tetrachloride removal from water by electron-beam irradiation
1994
Rosocha, L.A. | Secker, D.A. | Smith, Jonathan D.
High energy electron-beam irradiation is a promising technology for removing hazardous organic contaminants in water. To explore the effectiveness of particular accelerator systems, we have formulated a simple chemical kinetics model for removing TCE (trichloroethylene) and CCl4 in aqueous solutions. The production, recombination, and reaction of free radicals has been examined for various parameters (dose rate, pulse duration, and pulse repetition rate). Simulations show that low pulse intensities are more efficient than higher intensities in producing radicals because radical-radical recombination is dominant at higher dose rates. However, a train of short, high-dose, repetitive pulses (e.g., 100 ns, 10 kHz) can approach the removal efficiency of a continuous dose profile. Consequently, repetitively pulsed accelerators should be considered for future applications because of other specific machine advantages.
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