36133-35-4Relevant articles and documents
MTBE oxidation by conventional ozonation and the combination ozone/hydrogen peroxide: Efficiency of the processes and bromate formation
Von Gunten,Haderlein,Acero,Schmidt,Suter,Von Gunten
, p. 4252 - 4259 (2007/10/03)
The conventional ozonation and the advanced oxidation process (AOP) O3/H2O2 was used to study the behavior of MTBE and its primary degradation products during ozonation and the AOP O3/H2O2 for various raw waters. The major degradation products identified were tert-butyl formate (TBF), tert-butyl alcohol, 2-methoxy-2-methyl propionaldehyde (MMP), acetone, methyl acetate (MA), hydroxyisobutyraldehyde (HiBA), and formaldehyde. The rate constants of the reaction of O3 and OH radicals with MTBE were 0.14 and 1.9 × 109/M-sec, respectively. The rate constants for the same oxidation processes were also measured for the degradation products, TBF, MMP, MA, and HiBA. Since all compounds reacted slowly with molecular ozone, only the degradation pathway of MTBE with OH radicals was determined, including the formation of primary degradation products. In experiments conducted with several natural waters, the efficiency of MTBE elimination and bromate formation as disinfection byproduct were measured. With a bromide level of 50 μg/L, only 35-50% of MTBE could be eliminated by the AOP O3/H2O2 without exceeding the current drinking water standard of bromate (10 μg/L). The transient concentrations of MTBE and its primary degradation products were modeled using a combination of kinetic parameters (degradation product distribution and rate constants) together with the ozone and OH radical concentration and were in good agreement with the experimental results.
