Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-09T23:10:27Z No. of bitstreams: 1 MarcusViniciusGomesPaixao_DISSERT.pdf: 2020456 bytes, checksum: a95b5913fa8087068a71357d5448df6c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-11T20:04:25Z (GMT) No. of bitstreams: 1 MarcusViniciusGomesPaixao_DISSERT.pdf: 2020456 bytes, checksum: a95b5913fa8087068a71357d5448df6c (MD5) / Made available in DSpace on 2016-03-11T20:04:27Z (GMT). No. of bitstreams: 1 MarcusViniciusGomesPaixao_DISSERT.pdf: 2020456 bytes, checksum: a95b5913fa8087068a71357d5448df6c (MD5) Previous issue date: 2015-01-20 / A ?gua produzida ? considerada o principal efluente da ind?stria do petr?leo, em fun??o do seu volume crescente nos campos maduros e de sua composi??o variada. O teor de ?leos e graxas (TOG) ? considerado o principal par?metro para o descarte final da ?gua produzida. Diante desse contexto, ? de grande relev?ncia o desenvolvimento de um m?todo alternativo ? base de g?is de goma guar para o tratamento de ?guas produzidas sint?ticas, tendo como diferencial a utiliza??o de um pol?mero com elevada hidrofilicidade para a clarifica??o de ?guas contaminadas com petr?leo. Dessa forma, este trabalho tem como objetivo avaliar a efici?ncia de g?is de goma guar na remo??o do ?leo presente em ?guas produzidas. A goma guar ? um pol?mero natural que, em condi??es espec?ficas, forma estruturas tridimensionais, com importantes propriedades f?sico-qu?micas. Atrav?s da reticula??o das cadeias polim?ricas por ?ons borato, na presen?a de sais, ocorre o efeito salting out, reduzindo a solubilidade do gel polim?rico em ?gua. Como resultado, tem-se a separa??o das fases com o ?leo aprisionado no gel colapsado. O TOG foi quantificado a partir da espectroscopia na regi?o do ultravioleta e vis?vel. O sistema desenvolvido mostrou-se altamente eficiente na remo??o de petr?leo disperso em ?gua produzida sint?tica, atingindo porcentagens de remo??o superiores a 90%. / Produced water is considered the main effluent of the oil industry, due to their increased volume in mature fields and its varied composition. The oil and grease content (TOG) is the main parameter for the final disposal of produced water. In this context, it is of great significance to develop an alternative method based on guar gum gel for the treatment of synthetic produced water, and using as the differential a polymer having high hydrophilicity for clarifying waters contaminated with oil. Thus, this study aims to evaluate the efficiency of guar gum gels in the remotion of oil from produced water. Guar gum is a natural polymer that, under specific conditions, forms three-dimensional structures, with important physical and chemical properties. By crosslinking the polymer chains by borate ions in the presence of salts, the effect salting out occurs, reducing the solubility of the polymer gel in water. As a result, there is phase separation with the oil trapped in the collapsed gel. The TOG was quantified from the spectroscopy in the ultraviolet and visible region. The system was proven to be highly efficient in the removal of dispersed oil from water produced synthetically, reaching removal percentages above 90%.