Abstract
Degradation of methyl tert-butyl ether (MTBE) with Fe 2+/H 2O 2 was studied by purge-and-trap gas chromatography-mass spectrometry. MTBE was degraded 99% within 120 min under optimum conditions. MTBE was firstly degraded rapidly based on a Fe 2+/H 2O 2 reaction and then relatively slower based on a Fe 3+/H 2O 2 reaction. The dissolved oxygen decreased rapidly in the Fe 2+/H 2O 2 reaction stage, but showed a slow increase in the Fe 3+/H 2O 2 reaction stage. tert-Butyl formate, tert-butyl alcohol, methyl acetate and acetone were identified as primary degradation products by mass spectrometry. A preliminary reaction mechanism involving two different pathways for the degradation of MTBE with Fe 2+/H 2O 2 was proposed. This study suggests that degradation of MTBE can be achieved using the Fe 2+/H 2O 2 process.
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