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Previous issue date: 2014-07-25 / Dentre as atividades econ?micas potencialmente poluidoras que comprometem a qualidade do solo e da ?gua subterr?nea est?o os postos revendedores de combust?veis. O vazamento de combust?veis derivados do petr?leo a partir de tanques subterr?neos ou atividades realizadas indevidamente com estes poluentes podem contaminar extensas ?reas, causando s?rios problemas ambientais e toxicol?gicos. O n?mero de postos de combust?veis cresceu desordenadamente, sem nenhum tipo de controle, com isso os impactos ambientais gerados por esses empreendimentos cresceram ocasionando a polui??o do solo e da ?gua subterr?nea. V?rias t?cnicas utilizando tensoativos t?m sido propostas para remedia??o deste tipo de contamina??o. Este estudo apresenta como inova??o a aplica??o de diferentes sistemas contendo tensoativos na fase vapor e compara suas efici?ncias de remo??o de diesel de um solo contendo esse contaminante. Para isso, foi utilizado um sistema que cont?m sete po?os injetores das seguintes solu??es vaporizadas : ?gua, solu??es de tensoativo, microemuls?o e nanoemuls?o, Os tensoativos utilizados foram o ?leo de Coco Saponificado (OCS), em solu??o aquosa e um ?lcool etoxilado UNTL-90: em solu??o aquosa, e em sistemas de microemuls?o e nanoemuls?o. Dentre os sistemas investigados, a nanoemuls?o foi a que apresentou maior efici?ncia de remo??o com 88% do diesel, sendo a mais vi?vel ecol?gica e tecnicamente por ser um sistema com menor teor de mat?ria ativa. / Among the potentially polluting economic activities that compromise the quality of soil and
groundwater stations are fuel dealers. Leakage of oil derived fuels in underground tanks or
activities improperly with these pollutants can contaminate large areas, causing serious
environmental and toxicological problems. The number of gas stations grew haphazardly,
without any kind of control, thus the environmental impacts generated by these enterprises
grew causing pollution of soil and groundwater. Surfactants using various techniques have
been proposed to remedy this kind of contamination. This study presents innovation as the
application of different systems containing surfactant in the vapor phase and compares their
diesel removal efficiencies of soil containing this contaminant. For this, a system that contains
seven injection wells the following vaporized solutions: water, surfactant solution,
microemulsion and nanoemulsion, The surfactants used were saponified coconut oil (OCS), in
aqueous solution and an ethoxylated alcohol UNTL-90: aqueous solution , and nanoemulsion
and microemulsion systems. Among the systems investigated, the nanoemulsion showed the
highest efficiency, achieving 88% removal of residual phase diesel, the most ecologically and
technically feasible by a system with lower content of active matter
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19443 |
| Date | 25 July 2014 |
| Creators | Bezerril, Rayana Hozana |
| Contributors | 07286937391, http://lattes.cnpq.br/0676872399141537, Ramalho, Adriana Margarida Zanbotto, 01082106429, http://lattes.cnpq.br/6174408042782421, Souza, Katia Regina, 65561988468, http://lattes.cnpq.br/5304141450207132, Rodrigues, Marcos Allyson Felipe, 04575614408, http://lattes.cnpq.br/5453593230706116, Leite, Ricardo Henrique de Lima, 00522643434, http://lattes.cnpq.br/3801476460958779, Silva, Djalma Ribeiro da, Dantas, Tereza Neuma de Castro |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE PETR?LEO, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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