Recovery of phenol from aqueous solution by supported liquid membrane using vegetable oils as liquid membrane

Venkateswaran, Prabhakar; Palanivelu, K.

doi:10.1016/j.jhazmat.2005.09.025

Cited by 99 publications

(55 citation statements)

References 36 publications

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“…Vegetable oils are non-hazardous, cheap chemicals that could be used a novel and environmentally-friendly liquid medium (LM) in a supported liquid membrane (SLM) dye removal system. These vegetable oils are naturally-occurring, easily-available and renewable sources [26] . The results shown in Table 3 indicated that the used oil was the best suitable liquid membrane for removal of dye (95.45%) followed by the olive oil (87.00%).…”

Section: Resultsmentioning

confidence: 99%

“…There was also no transport of dye without oil impregnation of the membrane suggesting the need for the hydrophobic oil for the transport of dye. Venkateswaran and Palanivelu [26] suggested that vegetable oils have the ability to dissolve phenolic substances because of their hydrophobic characters. The authors tested nine types of vegetable oils (castor, refined coconut, unrefined coconut, gingerly, groundnut, mustard, olive, palm and sunflower) for their efficiency in transporting phenol through supported liquid membranes (SLM).…”

Section: Resultsmentioning

confidence: 99%

“…These include: adsorption [10] , nanofiltration [11,12] , colloidal gas aphrons [13] , ultrasonic decomposition [14] , electro coagulation [15] , coagulation and precipitation [16] , advanced chemical oxidation [17] , electrochemical oxidation [18][19] , photooxidation [18] , predispersed solvent extraction [20] , ozonation [21][22][23][24] , supported liquid membrane [2,25,26] , liquid-liquid extraction [25,27] and aerobic and anaerobic biological processes [28,29] . The advantages and disadvantages of some methods of dye removal from wastewater are given in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Dye from Textile Wastewater Using Plant Oils Under Different pH and Temperature Conditions

Mahmoud¹,

Ghaly²,

Brooks³

2007

American J. of Environmental Sciences

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Abstract:The effectiveness of five plant oils (cottonseed, olive, canola sunflower and used cooking oil) for the removal of dye from textile wastewater was evaluated. The study revealed that the dye removal efficiency increased as the temperature was increased. Under low pH, both the oil and dye split into two components each. Neither one of the oil components joined with either one of the dye components. However, the observed reduction in the absorbance under acidic conditions can be attributed to the dye components losing some of their original color or producing different colors that were not effectively measured at 475 nm. When the dye solution was shaken with the oil under alkaline conditions, it formed a colloidal solution containing the oil plus the dye, resulting in a significant dye removal from solution. The results also showed that the optimum conditions for the dye removal for various oils were at a pH of 13 and a temperature of 55 °C, except for canola oil that produced the highest dye removal efficiency at pH of 7. The used cooking oil achieved the highest dye removal efficiency (95.45%) followed by olive oil (87.00%). The other oils (cottonseed, canola and sunflower achieved dye removal efficiencies below 58% and are, therefore, not recommended for dye removal.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Dye from Textile Wastewater Using Plant Oils Under Different pH and Temperature Conditions

Mahmoud¹,

Ghaly²,

Brooks³

2007

American J. of Environmental Sciences

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“…The membrane was dipped in vegetable oil for impregnation for 15 h before use [29,33,35,57]. Excess of the oil adhered to the surface of the membrane was removed gently with the help of a tissue paper.…”

Section: Preparation Of Slm and Stock Solutionmentioning

confidence: 99%

“…The important features of supported liquid membrane include: (i) active transport, (ii) low energy consumption, (iii) high selectivity, (iv) minimal loss of extractant, (v) low membrane phase requirement and (vi) simple to operate and easy to scale up [29]. Major advantage of liquid membrane over conventional separation techniques is the simultaneous extraction and separation.…”

Section: Introductionmentioning

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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Separation of Cd(II) from its aqueous solution using environmentally benign vegetable oil as liquid membrane

Bhatluri

Manna

Saha

et al. 2013

Asia-Pacific J Chem Eng

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This work is intended for extraction and recovery of toxic heavy metal components, viz. Cadmium (Cd), from the industrial wastewater using liquid membrane (LM)-based separation technique. Exploring environmental benignity in the solvent (LM) is the main aim of this work. Vegetable oils are potential candidates toward that. Presence of carrier component in solvent often augments the solute transport mechanism. Although N,N-dimethyloctylamine (DMOA) is a very good carrier to show excellent extraction, the recovery is poor possibly because of high stability of complex between Cd(II) and DMOA in the membrane phase. The performance of LM-based separation process is affected by various physical and chemical parameters viz. pH, concentration, stirring rate, temperature, carrier concentration. An optimum operating condition has been identified that would yield the most efficient transport of solute.

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Recovery of phenol from aqueous solution by supported liquid membrane using vegetable oils as liquid membrane

Cited by 99 publications

References 36 publications

Removal of Dye from Textile Wastewater Using Plant Oils Under Different pH and Temperature Conditions

Removal of Dye from Textile Wastewater Using Plant Oils Under Different pH and Temperature Conditions

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

Separation of Cd(II) from its aqueous solution using environmentally benign vegetable oil as liquid membrane

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