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Previous issue date: 2015-06-30 / Ag?ncia Nacional do Petr?leo - ANP / A ?gua produzida ? um dos principais res?duos gerados durante a explora??o e produ??o de petr?leo, devido ao grande volume e a sua composi??o qu?mica complexa surge ? preocupa??o para que as concentra??es dos contaminantes atendam as legisla??es vigentes, com a finalidade de reduzir os efeitos nocivos ao meio ambiente provocado pelo seu descarte sem tratamento pr?vio. Assim, o objetivo deste trabalho ? caracterizar a ?gua produzida no Campo de Periquito, do Estado do RN e avaliar o potencial adsortivo do carv?o vegetal de coco baba?u para remo??o dos metais Ca e Sr da ?gua produzida, visando a sua adequa??o para descarte. Atrav?s da caracteriza??o f?sico-qu?mica da ?gua produzida, p?de-se observar que as concentra??es dos metais c?lcio e estr?ncio foram: 322 mg/L e 69 mg/L, respectivamente. O material a ser utilizado como adsorvente foi caracterizado por diferentes t?cnicas f?sico-qu?micas, tais como: granulometria, densidade aparente, an?lise elementar, an?lise t?rmica, FRX, MEV, DRX e pHPZC. De posse das an?lises das caracteriza??es foram realizados ensaios de adsor??o, pelo m?todo de banho finito em solu??es sint?ticas dos metais Ca e Sr. Os resultados demonstraram que o carv?o baba?u possui remo??o m?xima em baixas concentra??es. Paralelamente ao estudo de adsor??o em solu??es sint?ticas, foi realizado ensaios de adsor??o com a ?gua produzida e o resultado mostrou que o carv?o baba?u possui bom potencial de adsor??o, removendo acima de 50 % do c?lcio e acima 45 % do estr?ncio, e apresentando valores para a capacidade de adsor??o de 17,31 mg/g para o c?lcio e 3,15 mg/g para o estr?ncio. Para otimizar os ensaios de adsor??o foi aplicado o planejamento fatorial completo de dois n?veis com o intuito de verificar a influ?ncia da concentra??o dos metais Ca e Sr e a massa do adsorvente em solu??o sint?tica sobre a % remo??o e a capacidade de adsor??o dos metais. Atrav?s dos resultados das an?lises das superf?cies de respostas p?de-se observar que as regi?es ?timas para a remo??o dos metais foram no n?vel superior da concentra??o dos metais e no n?vel superior da massa de adsorvente (+1,+1) obtendo uma remo??o m?xima de 58 % do c?lcio e 63 % do estr?ncio. / Produced water is a major waste generated during oil exploration and production. Due to its large volume and complex chemical composition an effort arises so that the contaminant concentrations meet the current legislation, in order to reduce harmful effects on the environment caused by its disposal without prior treatment. The objective of this paper is to characterize produced water from the Periquito field, RN, Brazil, and assess the adsorptive potential of babassu nut charcoal for removal of calcium and strontium from produced water, focusing on its suitability for disposal. Through the physicochemical characterization of the produced water, it was possible to observe that the concentrations of calcium and strontium were: 322 mg/L and 69 mg/L, respectively. The material to be used as an adsorbent was characterized through different physicochemical techniques, such as laser particle size, density, elemental analysis, thermal analysis, XRF, SEM, XRD and pHPZC. Provided the characterization analysis, adsorption experiments were carried out using the method of finite bath in synthetic solutions of both calcium and strontium. The results showed that babassu nut charcoal has maximum adsorption removal at low concentrations. In parallel with the study on adsorption in synthetic solutions, adsorption experiments were performed with produced water, whose results showed that babassu nut charcoal has good adsorption potential, removing over 50% of calcium and above 45% strontium, and having values of 17.31 mg/g for the adsorption capacity for calcium and 3.15 mg/g for strontium. In order to optimize the experiments, the full factorial design of two levels was applied in order to verify the influence of the concentration of calcium, strontium and the mass of the adsorbent in synthetic solution on the percentage of removal (%) and the adsorption capacity of adsorption of these metals. From the analysis results, it was possible to observe that the optimal regions for the removal of these metals was in the upper level of the metal concentration and in the upper level of the adsorbent mass (+1, +1) obtaining a maximum removal of 58 % for calcium and 63 % for strontium.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20491 |
| Date | 30 June 2015 |
| Creators | Medeiros, Hena Lissa de Sousa |
| Contributors | 13893734449, http://lattes.cnpq.br/2791074318745945, Melo, Dulce Maria de Ara?jo, 06117988320, http://lattes.cnpq.br/3318871716111536, Braga, Renata Martins, 05165674460, http://lattes.cnpq.br/4603529162393328, Santiago, Rodrigo C?sar, 05345915407, http://lattes.cnpq.br/6823966481089536, Silva, Djalma Ribeiro da |
| 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/masterThesis |
| 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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