Nowadays, underground water is the main source of drinking water that contamination to organic pollutants such as MTBE is an important issue. One of the suitable methods for these types of pollutants is the advanced oxidation methods. Advanced oxidation processes (AOPs) are involved in the production of highly reactive hydroxyl radicals that oxidize organic matter such as MTBE and even le...

Abstract The peracetalization of a β-hydroxy hydroperoxide derived from methyl oleate was studied using benzaldehyde as model substrate to give the corresponding fatty 1,2,4-trioxane. desired product obtained mixture regioisomers but only one diastereoisomer each formed. nature acid catalyst and both p-toluene sulfonic (PTSA) Amberlyst A35 (A35) were found be efficient homogeneous heterogeneous...

Degradation of methyl tert-butyl ether (MTBE) vapors by cometabolism with pentane using a culture of pentane-oxidizing bacteria (Pseudomonas aeruginosa) was studied in a 2.4-L biofilter packed with vermiculite, an inert mineral support. Experimental pentane elimination capacity (EC) of approximately 12 g m(-3) h(-1) was obtained for an empty bed residence time (EBRT) of 1.1 h and inlet concentr...

two pure bacterial strains capable of rapid degrading methyl tert–butyl ether (mtbe) were isolated from an industrial wastewater treatment plant, identified and characterized. these strains are able to grow on mtbe as the sole carbon and energy sources and completely mineralize it to the biomass and carbon dioxide. the strains were identified as bacillus cereus and klebsiella terrigena. both st...

We have isolated a mixed bacterial culture (BC-1) which is capable of degrading the gasoline oxygenate methyl t-butyl ether (MTBE). BC-1 was developed from seed microorganisms present in a chemical plant biotreater sludge. This enrichment culture has been maintained in continuous culture treating high concentrations of MTBE (120 to 200 mg/liter) as the sole carbon source in a simple feed contai...

A Concise Background on Fuel Oxygenates Fuel oxygenates are oxygencontaining compounds (e.g., ethers and alcohols) that are added to gasoline either to boost the octane rating, to make the fuel burn cleaner by increasing the oxygen content, or to achieve a combination of both. The most commonly used oxygenates are methyl tertiary-butyl ether (MTBE) and ethanol. Other oxygenates include tertiary...

Vapor condensates of baseline gasoline (BGVC), or gasoline-blended with methyl tertiary butyl ether (G/MTBE), ethyl t-butyl ether (G/ETBE), t-amyl methyl ether (G/TAME), diisopropyl ether (G/DIPE), ethanol (G/EtOH), or t-butyl alcohol (G/TBA) were evaluated for reproductive toxicity in rats at target concentrations of 2000, 10,000, or 20,000mg/m(3), 6h/day, 7days/week. BGVC and G/MTBE were asse...

New pseudopolymorphs of ivermectin (IVM), a potential anti-COVID-19 drug, were prepared. The crystal structure for three pseudopolymorphic crystalline forms IVM has been determined using single-crystal X-ray crystallographic analysis. molecular conformation in crystals compared with the isolated molecules modeled by DFT calculations. In solvent relatively small (ethanol), monoclinic (space grou...

A membrane bioreactor (MBR) was operated for the removal of methyl tert-butyl ether (MTBE) from water. Although the reactor was seeded with several cultures acclimated to MTBE degradation, a long start-up time was observed. Monitoring of the reactor with denaturing gradient gel electrophoresis (DGGE) revealed a dramatic shift in the MBR culture from the original seed culture, indicating that th...

A stable water-in-oil-in-water (W1/O/W2) double emulsion containing in its inner aqueous phase a microbial consortium (60mgprotein L 1 double emulsion) known to degrade methyl tert-butyl ether (MTBE) was prepared. The primary emulsion (W1/O) had a volume disperse phase (f1) of 0.3 and was stabilized with 8% Span 80. The double emulsion had a volume disperse phase (f2) of 0.3 and was stabilized ...