Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/45424
標題: Oxidative Degradation of MTBE by Pyrite-Activated Persulfate: Proposed Reaction Pathways
作者: Liang, C.J.
梁振儒
Guo, Y.Y.
Chien, Y.C.
Wu, Y.J.
關鍵字: tert-butyl ether
in-situ remediation
aqueous-solution
ferrous ion
iron
tce
trichloroethylene
chemistry
mechanism
ozonation
期刊/報告no:: Industrial & Engineering Chemistry Research, Volume 49, Issue 18, Page(s) 8858-8864.
摘要: This bench-scale study investigated the feasibility of activated persulfate (S(2)O(8)(2-)) oxidation of methyl tertbutyl ether (MTBE), using pyrite (FeS(2)) as the source of ferrous ion activators. Under the FeS(2)-activated S(2)O(8)(2-) condition, the sulfate free radical (SO(4)) is the predominant reactive species generated. The oxidation reactions were able to completely degrade MTBE when given sufficient doses of FeS(2) and S(2)O(8)(2-) and sufficient reaction time (e.g., 3 g FeS(2)/L and 5 g Na(2)S(2)O(8)/L within 4 h) and exhibited generation and subsequent degradation of the primary MTBE degradation intermediate products including tert-butyl formate, tert-butyl alcohol, methyl acetate, and acetone. The detailed reaction mechanism proposed for a SO(4)(-)driven oxidation process in this paper indicates that the destruction of MTBE most likely happens through alpha-hydrogen abstraction via attack of the SO(4)(-) at the intermediate methoxy group.
URI: http://hdl.handle.net/11455/45424
ISSN: 0888-5885
文章連結: http://dx.doi.org/10.1021/ie100740d
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