Studies on the extraction of phenol in wastewater

Jiang, Hong; Fang, Ying; Fu, Yao; Guo, Qi

doi:10.1016/s0304-3894(03)00176-6

Cited by 147 publications

(91 citation statements)

References 14 publications

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“…Diversas técnicas de tratamento têm sido utilizadas para a redução de TOG da água como, por exemplo, extração por solvente [6] e separação por membrana [7][8][9] . No entanto, a possibilidade de emprego de resinas poliméricas porosas no tratamento da água produzida vem se intensificando em virtude de suas vantagens, como baixo custo, possibilidade de regeneração e reutilização, elevada seletividade e possibilidade de realização de modificações químicas por meio de reações tais como as realizadas para moléculas de baixa massa molar [10][11][12][13].…”

Section: -Síntese E Sulfonação De Resinas Poliméricas Macroporosas E unclassified

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

Aversa¹,

Queirós²,

Lucas³

et al. 2014

Polímeros

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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...

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Section: -Síntese E Sulfonação De Resinas Poliméricas Macroporosas E unclassified

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

Aversa¹,

Queirós²,

Lucas³

et al. 2014

Polímeros

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“…Higher interaction energy between compound to be extracted and liquid membrane phase indicates the stronger hydrogen bonds and the complex formed is more stable and the compound can be easily extracted. Jiang et al [60] demonstrated that extraction efficiency of carboxylic acid with shorter hydrocarbon chains is higher than that with longer ones. Whereas in case of alcohols or amines longer hydrocarbon chains resulted in higher extraction efficiency.…”

Section: Effect Of Different Triglycerides As Liquid Membranementioning

confidence: 99%

Extraction of phenol from aqueous effluent using triglycerides in supported liquid membrane

Badgujar

Rastogi

2011

Desalination and Water Treatment

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A B S T R A C TThis research work focuses on the removal of phenol using a flat sheet supported liquid membrane impregnated with triglycerides (vegetable oils). The mass transfer of phenol was found to be dependent on various factors such as type of vegetable oil, support material, feed phase pH and concentration, stripping phase concentration and stirring speed. The phenol transport was found to be higher when PTFE membrane (pore size 0.45 mm) impregnated with coconut oil was used and mass transfer coefficient was found to be 3.50 Â 10 À6 m/s. The corresponding stirring speed, pH of feed solution, concentration of stripping (NaOH) solution were 350 rpm, 4.0 and 0.2 M, respectively. The 92.5% of phenol was extracted from feed phase to stripping phase in 20 h. The aqueous boundary layer thickness reduced with an increase in stirring speed up to a certain extent (350 rpm), beyond which, it resulted in turbulence leading to displacement of impregnated oil from membrane pores. Phenol can be transported through the membrane, when it is present in molecular or undissociated state in aqueous solution. Since the pKa value of phenol is 10, the phenol will be present in undissociated form when the pH of the feed solution was 4.0, which resulted in the highest membrane mass transfer coefficient. The extraction of phenol was found to be dependent on the composition of fatty acids (chain length and position of double bond) in triglyceride. It may be concluded that PTFE membrane impregnated with triglyceride from coconut can be successfully used for the extraction of phenol from aqueous feed.

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“…Wastewater with high concentration of phenol is usually treated by an extraction process to reuse phenol. [2,3] In addition, some advanced technologies had been adopted to deal with wastewater with a low concentration of phenol, such as chemical processes, [4,5] ozonation, [5][6][7][8] ultrasonic processes, [9,10] fenton reaction, [11] compound oxidation process. [12,13] It is effective for ozone to sterilize, decrease chromaticity and smell, increase the biodegradability of refractory organics and improve the flocculent effect with its strong oxidation characteristics which is due to the high oxidation potential (2.08 V).…”

Section: Introductionmentioning

confidence: 99%

Degradation of Phenol in Wastewater with Ozone Produced by Self-design Ozone Generator

Wang

Zhong

et al. 2016

MATEC Web Conf.

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Abstract. The optimized tube's structure of the self-design ozone generator was made with the double dielectric inner electrode and small metal cones were embedded in the outside electrode. This ozone generator was used for the degradation of phenol in wastewater. The research was studied from ozone gas flow rate, reaction time, the initial pH and concentration of the phenol in wastewater. In addition, the article also discusses the reaction mechanism of ozone degraded the phenol in wastewater. The results illustrate that the ozone concentration of self-design ozone generator under the pure oxygen flux (1.0 L/min) were 7.06 mg/L, compared with the unoptimized ozone, the optimized ozone generator's efficiency was improved 56.89%; the phenol removal rate was increased as the initial pH increased in wastewater, when pH was 12, the phenol removal rate was 80.17%; GC-MS analysis was adopted to analyze and determine the phenol intermediates. The results illustrate that the major oxidation degradation products of phenol may be p-benzoquinone benzenequinone, 4-cyclopentene-1, 3-dione and diacetone alcohol.

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Studies on the extraction of phenol in wastewater

Cited by 147 publications

References 14 publications

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

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

Extraction of phenol from aqueous effluent using triglycerides in supported liquid membrane

Degradation of Phenol in Wastewater with Ozone Produced by Self-design Ozone Generator

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