Chronic inhalation studies were conducted to compare the toxicity and potential carcinogenicity of evaporative emissions from unleaded gasoline (GVC) and gasoline containing the oxygenate methyl tertiary-butyl ether (MTBE; GMVC). The test materials were manufactured to mimic vapors people would be exposed to during refueling at gas stations. Fifty F344 rats per gender per exposure level per tes...

Methyl-tert-butyl ether (MTBE), a fuel oxygenate that is added to gasoline, commonly contaminates aquatic systems, many of which are already contaminated with pesticides. The toxic effects (EC(50) value) of several pure pesticides (Diuron, Linuron, Dichlofluanid, Sea nine, Irgarol and tributyltin (TBT)) were measured and compared with the EC(50) value of the pesticide mixed with MTBE, using the...

Co-metabolic bioremediation is supposed to be an impressive and promising approach in the elimination technology of methyl tert-butyl ether (MTBE), which was found to be a common pollutant worldwide in the ground or underground water in recent years. In this paper, bacterial strain DZ13 (which can co-metabolically degrade MTBE) was isolated and named as Pseudomonas sp. DZ13 based on the result ...

The current concern over point-source and non-point-source contamination of ground water by methyl tert-butyl ether (MTBE) has increased the need for a better understanding of the processes that control its environmental fate. As part of an ongoing study to characterize the potential for natural attenuation of MTBE, we have prepared a series of model column aquifers to investigate the pathways ...

This study utilized the electrocatalytic characteristics of nickel electrode to perform degradation of methyl tert-butyl ether (MTBE) in aqueous solution. Lab experiments were conducted in a spiltless bath type cell equipped with a nickel electrode as working electrode, a platinum wire as counter electrode, and an Ag/AgCl electrode as reference electrode. Effects of controlled potential, suppor...

The degradation of methyl tert-butyl ether (MTBE) was investigated in the aqueous solution of coated ZnO onto magnetite nanoparticale based on an advanced photocatalytic oxidation process. The photocatalysts were synthesized by coating of ZnO onto magnetite using precipitation method. The sample was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibration samp...

Plant systems can be effective pump-and-treat systems for some contaminants. There is interest in finding inexpensive remediation technologies for sites contaminated by carbon tetrachloride and ethylene dibromide from grain fumigation activities. Experimental investigations have shown that volatile compounds such as trichloroethylene and methyl tertiary butyl ether (MTBE) are released to the at...

In this study, the concentrations of five volatile organic compounds (VOCs), including BTEX and methyl tertiary-butyl ether (MTBE), were investigated in five different traffic tunnels (including Liangshan, Yueguangshan, Zoying, Guogang and Zhongliao tunnels) in southern Taiwan. Results showed that Guogang Tunnel was the most polluted with the highest average levels of both MTBE and BTEX while e...

195 INTRODUCTION In an attempt to reduce the environmental consequences associated with incomplete fuel combustion, the US Clean Air Act Amendments of 1990, required that oxygenates are added to reformulated gasoline. Since 1979, methyl tert butyl ether (MTBE) has been used in the USA as an octane enhancing replacement for lead, primarily in mid and high grade gasoline. It is the most commonly ...