Avaliação de HPA e BTEX no solo e água subterrânea, em postos de revenda de combustíveis: estudo de caso na cidade de Natal -RN
The retail fuel stations are partially or potentially polluters and generators of environmental accidents, potentially causing contamination of underground and surface water bodies, soil and air. Leaks in fuel retail stations´ underground storage systems are often detected in Brazil and around th...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/12978 |
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| Resumo: | The retail fuel stations are partially or potentially polluters and generators of
environmental accidents, potentially causing contamination of underground and
surface water bodies, soil and air. Leaks in fuel retail stations´ underground storage
systems are often detected in Brazil and around the world. Monoaromatic
hydrocarbons, BTEX (benzene, toluene, ethylbenzene and xylenes) and polycyclic
aromatic hydrocarbons (PAHs) are an indication of the presence of contamination due
to its high toxicity. This paper presents a case study of contamination in a Fuel Retail
Station by petroleum derivative products in the city of Natal. For identification and
quantification of the hydrocarbons, EPA analytical methods were used. The values of
benzene quantified by EPA method 8021b CG-PID/FID, ranged from 1.164 to 4.503
mg.Kg-1 in soil samples, and from 12.10 to 27,639 μg.L-1 in underground water
samples. Among the PAHs, naphthalene and anthracene showed the most significant
results in soil samples, 0.420 to 15.46 mg.Kg-1 and 0.110 to 0,970 mg.Kg-1,
respectively. In underground water samples, the results for Naphthalene varied
between 0.759 and 614.7 μg.L-1. PAHs were quantified by EPA Method 8270 for GCMS.
All of the results for the chemical analysis were compared with the values for the
CONAMA 420/2009 resolution. The results for benzene (27,639 μg.L-1) showed levels
highly above the recommended by the CONAMA 420 resolution, wherein the
maximum permissible for underground water is 5 μg.L-1. This is a worrying factor,
since underground water makes up 70% of the city of Natal´s water supply |
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