Much Ado: How Big Is the Problem of Hydrolysis of Methyl Tertiary Butyl Ether (MtBE) to Form Tertiary Butyl Alcohol (tBA)?

2003 ◽  
Vol 4 (4) ◽  
pp. 239-243 ◽  
Author(s):  
Yue Rong ◽  
Henry B. Kerfoot
Keyword(s):  
Butyl Alcohol ◽  
Methyl Tertiary Butyl Ether ◽  
Tertiary Butyl Alcohol ◽  
Butyl Ether ◽  
Tertiary Butyl ◽  
Hydrolysis Of

scholarly journals Modelling methyl tertiary butyl ether and tertiary butyl alcohol biodegradation by a bacterial consortium

2011 ◽  
Vol 17 (5) ◽  
pp. 491-500
Author(s):  
Astrid M. Cappuyns ◽  
Linde J. Debor ◽  
Ilse Y. Smets ◽  
Dirk Springael ◽  
Leen Bastiaens ◽  
...  
Keyword(s):  
Bacterial Consortium ◽  
Butyl Alcohol ◽  
Methyl Tertiary Butyl Ether ◽  
Tertiary Butyl Alcohol ◽  
Butyl Ether ◽  
Tertiary Butyl

Bioremediation of methyl tertiary-butyl ether (MTBE) by an innovative biofilter

2004 ◽  
Vol 49 (1) ◽  
pp. 87-94 ◽  
Author(s):  
C. Hu ◽  
K. Acuna-Askar ◽  
A.J. Englande
Keyword(s):  
Hydraulic Retention Time ◽  
Natural Fiber ◽  
Butyl Alcohol ◽  
Methyl Tertiary Butyl Ether ◽  
Tertiary Butyl Alcohol ◽  
Operational Parameters ◽  
Butyl Ether ◽  
Unleaded Gasoline ◽  
Tertiary Butyl ◽  
Treated Effluent

Methyl tertiary-butyl ether (MTBE) is a synthetic chemical used in unleaded gasoline as an additive to reduce levels of ozone and carbon monoxide from auto exhaust. Due to its chemical and recalcitrant properties, MTBE has caused groundwater contamination worldwide. A laboratory-scale biofilter made of a natural fiber (kenaf) mat and inoculated with MTBE-degrading microorganisms, was evaluated for MTBE removal efficiency. Operational parameters of oxygen flow rate, hydraulic retention time (HRT), yeast extract and initial MTBE concentration were varied and MTBE removal efficiencies determined. Four kinetic models were evaluated to describe the MTBE removal in the reactor. Formaldehyde and tertiary butyl alcohol (the most two reported MTBE biodegradation byproducts) were not found in the effluent; instead, carbon dioxide was monitored as the end product based on the results of a metabolic mass balance evaluation. Toxicity of treated effluent was evaluated by employing the Microtox acute toxicity test and comparing that to the influent.

scholarly journals Cometabolism of Methyl tertiary Butyl Ether and Gaseous n-Alkanes by Pseudomonas mendocina KR-1 Grown on C5 to C8n-Alkanes

2003 ◽  
Vol 69 (12) ◽  
pp. 7385-7394 ◽  
Author(s):  
Christy A. Smith ◽  
Kirk T. O'Reilly ◽  
Michael R. Hyman
Keyword(s):  
Growth Stimulation ◽  
Butyl Alcohol ◽  
Lag Phase ◽  
Methyl Tertiary Butyl Ether ◽  
Pseudomonas Mendocina ◽  
Butyl Ether ◽  
Tertiary Butyl ◽  
In Cells

ABSTRACT Pseudomonas mendocina KR-1 grew well on toluene, n-alkanes (C5 to C8), and 1° alcohols (C2 to C8) but not on other aromatics, gaseous n-alkanes (C1 to C4), isoalkanes (C4 to C6), 2° alcohols (C3 to C8), methyl tertiary butyl ether (MTBE), or tertiary butyl alcohol (TBA). Cells grown under carbon-limited conditions on n-alkanes in the presence of MTBE (42μ mol) oxidized up to 94% of the added MTBE to TBA. Less than 3% of the added MTBE was oxidized to TBA when cells were grown on either 1° alcohols, toluene, or dextrose in the presence of MTBE. Concentrated n-pentane-grown cells oxidized MTBE to TBA without a lag phase and without generating tertiary butyl formate (TBF) as an intermediate. Neither TBF nor TBA was consumed by n-pentane-grown cells, while formaldehyde, the expected C1 product of MTBE dealkylation, was rapidly consumed. Similar Ks values for MTBE were observed for cells grown on C5 to C8 n-alkanes (12.95 ± 2.04 mM), suggesting that the same enzyme oxidizes MTBE in cells grown on each n-alkane. All growth-supporting n-alkanes (C5 to C8) inhibited MTBE oxidation by resting n-pentane-grown cells. Propane (Ki = 53 μM) and n-butane (Ki = 16 μM) also inhibited MTBE oxidation, and both gases were also consumed by cells during growth on n-pentane. Cultures grown on C5 to C8 n-alkanes also exhibited up to twofold-higher levels of growth in the presence of propane or n-butane, whereas no growth stimulation was observed with methane, ethane, MTBE, TBA, or formaldehyde. The results are discussed in terms of their impacts on our understanding of MTBE biodegradation and cometabolism.

APPLICATION OF IR SPECTROSCOPY IN THE STUDY OF MINERAL OIL

2017 ◽  
pp. 91-95
Author(s):  
E. I. Grushova ◽  
A. .. Al Razuqi ◽  
E. S. Chaiko ◽  
O. A. Miloserdova
Keyword(s):  
Ir Spectroscopy ◽  
Group Composition ◽  
Mineral Oil ◽  
Vacuum Distillate ◽  
Methyl Tertiary Butyl Ether ◽  
Butyl Ether ◽  
Tertiary Butyl ◽  
Mineral Oils ◽  
Modifying Additive

IR spectroscopy investigated structural and group composition of base mineral oils isolated from the vacuum distillate by selective purification of N-methylpyrrolidone and the low temperature dewaxing in the presence of a solvent. The role of the latter was carried out by the systems acetone - toluene, acetone - methyl tertiary butyl ether, methyl ethyl ketone - toluene, acetone - toluene - modifying additive. It was shown that the chemical composition of the group of base oils and slack waxes is defined as the nature of the solvent to the dewaxing, and oils sequence of purification steps.

Sign in / Sign up

Export Citation Format

Share Document