Removal of phenolic compounds from aqueous solutions by emulsion liquid membrane containing Ionic Liquid [BMIM]+[PF6]− in Tributyl phosphate

Balasubramanian, A.S.; Venkatesan, S.

doi:10.1016/j.desal.2011.12.027

Cited by 110 publications

(24 citation statements)

References 39 publications

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“…By carrying out parameter optimization based on the built mathematical models; the obtained experimental conditions for phenol removal were: surfactant concentration – 4.95% (v/v), internal agent concentration – 0.298 N, emulsification time – 4.07 min, I/M ratio – 0.93, stirring speed – 247 rpm, and external phase pH – 5.91, respectively. From the model prediction, 99.89% of phenol removal is possibly achieved and the comparison of model results with experimentally optimized results (based on the previous study ) is shown in Tab. Table .…”

Section: Resultsmentioning

confidence: 96%

“…For ELM system preparation, Span 80 as a surfactant, kerosene as a diluent and ionic liquid mixed carrier (0.02% of ionic liquid [BMIM] + [PF 6 ] − , 0.2% tributyl phosphate concentration) were used . Water in oil (W/O) mixture was prepared by mixing the surfactant and diluent in a desired ratio with NaOH solution as an internal stripping agent.…”

Section: Methodsmentioning

confidence: 99%

“…In this present work, the interactions among the following six operating variables: surfactant concentration, internal phase (NaOH) concentration, emulsification time, internal to membrane phase (I/M) ratio, stirring speed and pH was studied using MinRes V. Statistically optimized condition for maximum removal of phenol from aqueous solution using MinRes V was found out and the results were compared with the optimized conditions from experimental studies of our earlier work .…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Removal of Phenol from Aqueous Solution by Ionic Liquid‐Based Emulsion Liquid Membrane Using Response Surface Methodology

Balasubramanian

Venkatesan

2013

CLEAN Soil Air Water

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Response surface methodology was employed to optimize the removal of phenol from aqueous solution by ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate dissolved in tributyl phosphate) based emulsion liquid membrane. A ''minimum run resolution V'' central composite design with six variables (surfactant concentration, internal phase concentration, emulsification time, internal to membrane phase ratio, stirring speed and external phase pH) was applied to optimize the process. The optimized conditions for maximum removal of phenol were a surfactant concentration -4.95% (v/v), internal agent concentration -0.298 N, emulsification time -4.07 min, internal to membrane phase ratio -0.93, stirring speed -247 rpm and external phase pH -5.91 respectively. The results showed good fits with the proposed statistical model for removal of phenol (R 2 ¼ 0.9833).Abbreviations: ANOVA, analysis of variance; CCD, central composite design; ELM, emulsion liquid membrane; I/M, internal to membrane phase; RSM, response surface methodology 64

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Section: Resultsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of Removal of Phenol from Aqueous Solution by Ionic Liquid‐Based Emulsion Liquid Membrane Using Response Surface Methodology

Balasubramanian

Venkatesan

2013

CLEAN Soil Air Water

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“…Thus, detection and determination of the concentration of phenolic compounds in wastewater and their subsequent removal in all steps of production, treatment and evacuation of wastewater into the sources appears to be necessary. Regulations of World Health Organization limits the phenol concentration to below 0.1 μg L −1 (ppb) and according to the regulations of MOEF (Ministry of Environment and Forests) its maximum allowed amount in the output of the industries and surface water is considered 1 mg L −1 (10, 14). When releasing wastewater into the surface water and for agricultural and drinking uses, the maximum allowed amount of phenol concentration is determined as 1 mg L −1 and 0.5 μg L −1 by Environmental Protection Agency Standard and Standard Institute of Iran, respectively (15, 16).…”

Section: Introductionmentioning

confidence: 99%

Phenol Removal from Aqueous Environment by Adsorption onto Pomegranate Peel Carbon

Afsharnia¹,

Saeidi²,

Zarei³

et al. 2016

Electron physician

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IntroductionPhenol and its derivatives are the most common poisonous compounds which are stable in aqueous media and lead to many health issues. In this study, application of the carbon resulted from pomegranate peel is investigated in removal of phenol by adsorption method.Methodsto perform this cross-sectional study, first, samples of phenol with concentrations of 10 to 100 mg/L were prepared for six months in 2016. Then, the impacts of parameters such as pH, adsorbent dosage, contact time, and initial concentration of phenol in adsorption process were investigated independently in Gonabad Chemistry Lab using a spectrophotometer at 505 nm as the wavelength. Furthermore, adherence of the samples to the isotherm models of Langmuir and Freundlich was determined by Excel 2016 and descriptive statistical methods were then reported.ResultsThe obtained results demonstrated a maximum adsorption capacity (ash) of 148.38 mgg-1 at pH 7, initial concentration of 100 mg L−1, and temperature of 23 ± 2 °C. The phenol removal rate was found to correlate directly to the adsorbent dosage and contact time, and inversely to the initial concentration of phenol. In addition, the investigations showed that the adsorption of phenol on the pomegranate peel ash follows the Freundlich model well with a correlation coefficient of R2 0.9056.ConclusionPomegranate peel ash could be used as an efficient and low-cost adsorbent for phenol removal from aqueous media.

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“…Various treatment methods for removal of phenolic compounds include biosorption, enzymatic treatment, and oxidation. Among the various physico‐chemical processes, the biosorption technology has been widely considered in recent years . Although, biosorption onto activated carbon is a successful means of eliminating pollutants from wastewater, restoration of used activated carbon is costly and results in loss of the adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Abstraction of Phenol Onto Micrococcus lylae and Cetyl Trimethyl Ammonium Bromide

Saravani

Senthilkumar

Kugarajah

2016

CLEAN Soil Air Water

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Experimental Investigation on Abstraction of Phenol Onto Micrococcus lylae and Cetyl Trimethyl Ammonium BromideAir floatation, an efficient solid-liquid separation process, was tested as a post treatment technique for phenol removal. The results consider about the practical solutions for certain operations such as efficient solid-liquid separation, attainment of maximized percentage removal, phenol rich solution with Micrococcus lylae cells, and pure water without M. lylae cells. The two processes, biosorption and flotation, can effectively operate in combination and both the sorbent and treated water can be recycled. The effect of various operating parameters, such as initial feed concentration, equilibrium time, biosorbent dose, pH, liquid pool height, surfactant concentration, and air flow rate, was experimentally investigated. The maximum sorption capacity was found to be 303 mg/g at pH 7 and an initial phenol concentration of 500 mg/L. The higher floatability of M. lylae was obtained in a maximum time of 10 min. In addition, the adsorption isotherm and kinetic studies revealed that the biosorption process followed the Dubinin-Radushkevich model (R 2 ¼ 0.982) and pseudo-first order kinetics with a kinetic constant of 2.6537/day. The adsorbed chemical species was identified by Fourier transform infrared (FTIR) spectroscopy. Electrokinetic measurements were carried out to determine the isoelectric point of the bacteria. The zeta potential profile of the bacteria was affected by the presence of phenol at different pH values. The recovery of phenol loaded biomass and final traces of phenol by flotation were found to be 99.91%.Abbreviations: 4-AAP, 4-amino anti pyrine; BET, Brunauer-Emmett-Teller; CTAB, cetyl trimethyl ammonium bromide; FTIR, Fourier transform infrared.

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Removal of phenolic compounds from aqueous solutions by emulsion liquid membrane containing Ionic Liquid [BMIM]+[PF6]− in Tributyl phosphate

Cited by 110 publications

References 39 publications

Optimization of Removal of Phenol from Aqueous Solution by Ionic Liquid‐Based Emulsion Liquid Membrane Using Response Surface Methodology

Optimization of Removal of Phenol from Aqueous Solution by Ionic Liquid‐Based Emulsion Liquid Membrane Using Response Surface Methodology

Phenol Removal from Aqueous Environment by Adsorption onto Pomegranate Peel Carbon

Experimental Investigation on Abstraction of Phenol Onto Micrococcus lylae and Cetyl Trimethyl Ammonium Bromide

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