Síntese e sulfonação de resinas poliméricas macroporosas e avaliação na remoção de petróleo e de anilina em água

Abstract

Resumo:Resinas poliméricas porosas têm sido amplamente empregadas nos processos de tratamento de água devido a vantagens como elevada seletividade e possibilidade de regeneração e modificação química, permitindo a obtenção de um material com maior seletividade/especificidade. No presente estudo, resinas poliméricas porosas de metacrilato de metila-divinilbenzeno (MMA-DVB), estireno-divinilbenzeno (Sty-DVB) e estireno-divinilbenzeno sulfonada (S-Sty-DVB) foram sintetizadas, caracterizadas e avaliadas quanto à eficiência de remoção de petróleo e de anilina contidos na água. Nos testes empregando-se água oleosa, foram avaliadas colunas contendo somente um tipo de resina (Sty-DVB e S-Sty-DVB) e colunas contendo recheios mistos (MMA-DVB/S-Sty-DVB e Sty-DVB/S-Sty-DVB), frente à remoção de óleo e dos cátions sódio e cálcio presentes na água oleosa. As colunas com recheio misto apresentaram melhor desempenho, devido à diversidade de hidrofilicidade do sistema adsorvente, tendo sido possível remover uma gama mais extensa de contaminantes. A remoção de anilina presente na água foi possível com o uso da resina de estireno-divinilbenzeno sulfonada, em razão da reação ácido-base entre a anilina e os sítios ácidos da resina. Uma redução gradual, e não abrupta, da eficiência desta resina na remoção de anilina deve-se à interação de moléculas de anilina com o sal de anilínio formado após a saturação dos sitos ácidos da resina. Palavras-chave: Resinas poliméricas, sulfonação, água oleosa produzida, TOG, anilina, tratamento de água. Synthesis and Sulfonation of Macroporous Polymeric Resins and their Assessment for Removal of Oil and Aniline from WaterAbstract: Polymeric resins have been widely used in water treatment processes due to their advantages, such as high selectivity and possibility of regeneration and chemical modification, allowing obtaining a material with greater selectivity/specificity. In the present study, porous polymeric resins of methyl methacrylate-divinylbenzene (MMA-DVB), styrene-divinylbenzene (Sty-DVB) and sulfonated styrene-divinylbenzene (S-Sty-DVB) were synthesized, characterized and evaluated for their efficiency in removing oil and aniline contained in water. In the tests with oily water, the efficiency in removing oil and cations of sodium and calcium was assessed with columns containing only one type of resin (Sty-DVB or S-Sty-DVB) and columns containing blended filling (MMA-DVB/S-Sty-DVB and Sty-DVB/S-Sty-DVB). The columns containing the mixture performed better, due to the diverse hydrophilicity of the adsorbent system, allowing removal of a wider range of contaminants. The removal of aniline from the water was possible with the use of the sulfonated styrene-divinylbenzene because of the reaction between the aniline and acidic sites of the resin. The efficiency of this resin in removing aniline declined gradually rather than abruptly, due to the interaction of the aniline molecules with the aniline salt formed after saturation of the resin's acidic sites. Keywords: Polymeric resins, sulfonation, p...

Solubility behavior of amphiphilic sulfonated copolymers based on styrene–stearyl methacrylate and styrene–stearyl cinnamate

“…Another vibration, indicating the presence of sulfonic groups in the copolymer after the reaction, is found in the region between 2900 and 3600 cm −1 . This wide band is characteristic of the stretching of the OH bond related to the SO 3 H acid group …”

Smectite Clay Modified with Quaternary Ammonium as Oil Remover

“…6 Adsorption has been widely studied and used to treat effluents contaminated by various toxic substances. [13][14][15][16][17][18][19][20][21][22] Natural adsorbents such as clays can be chemically modified to adjust their physical-chemical properties, adding functionalities for use in various types of applications. 10,23,4 Specifically in the treatment of effluents produced by the petroleum industry, it is important to develop new materials and improve existing ones that have good cost-benefit ratios, especially those that are abundant in nature.…”

Removal of Petroleum from Aqueous Systems by Poly(divinylbenzene) and Poly(methyl methacrylate-divinylbenzene) Resins: Isothermal and Kinetic Studies

“…Firstly, synthetic saline water was prepared containing NaCl and CaCl 2 in the ratio of 10:1, respectively, with the total salt concentration of 55 kg/m 3 . The salts were dissolved in half the total volume of water, by magnetic stirring, and after their total dissolution the rest of the water was added to the system [31,35]. This concentration of salts was chosen because it is near the salinity of the water typically found in oil fields [36].…”

“…Several studies of the use of STY-DVB resins to treat produced water have been published [27][28][29]. Since crude oil is a complex mixture of compounds with different characteristics, some studies have been published investigating the efficiency of resins made from methyl methacrylate (MMA) and DVB [30][31][32]. These resins show as advantages the lower toxicity of MMA in relation to STY and slightly more polar character of MMA [33], inducing more effective adsorption of other types of molecules that compose crude oil.…”