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Contamination of groundwater by volatile organic compounds has been featured in recent decades. This type of contamination is due primarily to small and continuous leaks at gas stations, causing serious problems to public health and the environment. The pollution potential gasoline is directly linked to the aromatic hydrocarbon higher solubility in water, benzene, toluene, ethylbenzene and xylenes (BTEX). Based on these antecedents, the search for new alternatives for treating contaminated water is shown to be absolutely essential. Therefore, this study aimed to evaluate the efficiency of removal of benzene by adsorption processes employing alumina (Al2O3) as heterogeneous catalyst. It was prepared by a standard solution, 0.1% gasoline and distilled water to simulate an actual sample. Several trials, where he was placed 1 liter of this standard solution to react in the presence of Al2O3 in a closed, mechanical stirring system were performed. Every 10, 20, 40 and 60 minutes, aliquots of this sample were taken and brought to analysis by gas chromatography coupled to mass spectrometry (GC-MS) with headspace extraction. The adopted procedure allows the detection of concentrations of the order of ppb (ug/L) benzene. The results showed good benzene retention efficiency for the Al2O3 adsorption, the largest benzene holding capacity in the test where the concentration of the adsorbent was 12 g/L and the 60 minutes reaction time, resulting in an efficiency of 40.51 % benzene removal

Avaliação da capacidade de adsorção do Al2O3 na remoção de benzeno