Keywords: gasoline vapour, ethanol, BTEX evaporation, benzene, toluene, ethylbenzene, xylene, petrol vapour, soil contamination, environmental pollution
The environmental aspects of the evaporation of BTEX from gasoline with and without ethanol
In this work the vapours from two columns simulating gasoline–contaminated soils (with and without ethanol) were monitored. Standards mixtures of BTEX, containing different ethanol contents were also analysed. The instrumental analysis was performed by Gas Chromatography with a Flame Ionisation Detector. Among BTEX, except benzene, in both columns the evaporation rate increases with time. In the gasoline/ethanol column this effect is higher particularly for the xylenes. Although the benzene concentrations were reduced in both columns, this reduction was less marked in the gasoline/ethanol column. The toluene concentrations were higher in the pure gasoline column.