Bergendahl John A, Thies Timothy P
Department of Civil and Environmental Engineering, 100 Institute Road, Worcester Polytechnic Institute, Worcester, MA 01609, USA.
Water Res. 2004 Jan;38(2):327-34. doi: 10.1016/j.watres.2003.10.003.
Methyl tert-butyl ether (MTBE) has become a contaminant of increasing concern in the U.S. Traditional remediation technologies are successful in removing MTBE from contaminated water, but usually transfer the contaminant from the aqueous to another phase. Fenton's oxidation of MTBE provides a promising alternative to traditional remediation techniques in that it may mineralize the contaminant rather than just phase transfer. This bench-scale study investigated the feasibility of Fenton's oxidation of MTBE using zero-valent iron as the source of catalytic ferrous iron. The oxidation reactions were able to degrade over 99% of the MTBE within 10 min, and showed significant generation, and subsequent degradation, of the MTBE oxidation byproduct acetone. Second-order rate constants for MTBE degradation were 1.9 x 10(8) M(-1) s(-1) at pH 7.0 and 4.4 x 10(8) M(-1) s(-1) at pH 4.0. The total organic carbon was reduced by over 86% when a H2O2:MTBE ratio of 220:1 or greater was used.
甲基叔丁基醚（MTBE）已成为美国日益受到关注的一种污染物。传统修复技术能够成功地从受污染水中去除MTBE，但通常会将污染物从水相转移到另一相。MTBE的芬顿氧化法为传统修复技术提供了一种有前景的替代方法，因为它可能使污染物矿化，而不仅仅是进行相转移。这项实验室规模的研究调查了以零价铁作为催化亚铁来源进行MTBE芬顿氧化的可行性。氧化反应能够在10分钟内降解超过99%的MTBE，并显示出MTBE氧化副产物丙酮的大量生成以及随后的降解。MTBE降解的二级反应速率常数在pH 7.0时为1.9×10⁸ M⁻¹ s⁻¹，在pH 4.0时为4.4×10⁸ M⁻¹ s⁻¹。当过氧化氢与MTBE的比例为220:1或更高时，总有机碳减少了超过86%。
