conclusions changes of ph could remarkably affect the efficiency and oxidation rate of mtbe. in particular, the amount of kap in terms of oxidation declines substantially by moving away from the optimum ph range. in this study, ph 3.5 was considered as the optimal ph in h2o2/nzvi/ultrasonic oxidation process, with the elimination of about 89.56% of the high mtbe concentration. in general, we ca...

SUMMARY A health outcomes review was conducted for the Village of Liberty because of concerns about health effects from methyl tert-butyl ether (MTBE) in the water supply system. A health outcomes review examines a particular group of people as a whole to see how it compares to a group not living in the area of concern. It cannot link an environmental exposure to a specific health effect and it...

Increasing groundwater contamination with methyl tert-butyl ether (MTBE) requires more efficient remediation technologies. Accurate measurement of MTBE's air-water partitioning coefficient (Henry's law constant, H) is important for the design and optimization of removal efficiency for many treatment systems as well as for predicting its fate and transport. Previously published data for MTBE app...

This paper presents a cost-benefit analysis of the 1990 Clean Air Act Amendments (CAAA) requiring the addition of oxygen content in gasoline, using California as a case study. The valuation and comparison of costs and benefits for several fuel blends (with and without oxygen content) provides a framework to investigate cross-media (air, water, soil) tradeoffs. We use known valuation methods suc...

The primary objective of this study was to evaluate the impact of substrate interactions on the biotransformation rates and mineralization potentials of gasoline monoaromatics and methyl tert-butyl ether (MTBE), compounds that commonly co-exist in groundwater contaminant plumes. A mixed culture was derived from gasoline-contaminated aquifer material using toluene as the enrichment substrate. Tw...

• The performance of a reactive distillation column with cyclic operation is analysed. This the first simulation for an equilibrium reaction. Conventional and are compared production MTBE. In this paper MTBE from isobutene methanol via studied mass energy balance stage model. study shows application model, where reaction assumed. A process design equivalent to conventional has been simulated. o...

Traditionally, the greatest concerns associated with gasoline releases have been non-aqueous phase liquids (NAPL) and dissolved-phase benzene, toluene, ethylbenzene, and xylenes (BTEX). The assessment techniques commonly used by industry (API, 1996) were originally developed to meet regulatory requirements for NAPL and BTEX characterization. However, the chemical properties and subsurface behav...