UVM GEOL 135 - Davis and Erickson 2004 EP - Bioremediation MTBE (10 pages)

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Davis and Erickson 2004 EP - Bioremediation MTBE



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Davis and Erickson 2004 EP - Bioremediation MTBE

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Pages:
10
School:
The University of Vermont
Course:
Geol 135 - Geochemistry

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A Review of Bioremediation and Natural Attenuation of MTBE Lawrence C Davis and Larry E Erickson Departments of Biochemistry and Chemical Engineering Kansas State University Manhattan KS 66506 ldavis ksu edu for correspondence Published online in Wiley InterScience www interscience wiley com DOI 10 1002 ep 10028 Methyl tert butyl ether MTBE has been the focus of much attention because it is used in large amounts and was reportedly relatively recalcitrant to bioremediation or natural attenuation Beginning with a few papers a decade ago evidence has been presented that in fact under suitable conditions it is amenable to bioremediation Many species from widely disparate microbial genera are able to consume it either as a sole carbon source or as a cometabolite Optimal conditions differ from site to site Both aerobic and anaerobic conditions may permit MTBE degradation with a range of electron acceptors from oxygen through Fe III Mn IV sulfate nitrate and methanogenesis MTBE metabolism in the vadose zone can be highly active The published literature suggests that natural populations are adapting to MTBE and reported rates of biodegradation appear to be larger in the more recent literature Plants may serve as ef cient conduits to withdraw MTBE from the wet subsurface releasing it to the atmosphere or the vadose zone where it may be metabolized or diffuse into the atmosphere where it is quickly photodegraded The major remaining issues are the time required to attain speci ed criteria of cleanup or whether augmentation is necessary for effective remediation 2004 American Institute of Chemical Engineers Environ Prog 23 243 252 2004 Keywords tion MTBE bioremediation phytoremedia INTRODUCTION MTBE more formally methyl tert butyl ether has been extensively used as an octane booster and oxygenate additive in reformulated gasoline in the United States With MTBE being distributed nationwide the potential for contamination of soil and groundwater is substantial Efforts to develop



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