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Extraction of Phenol and Citric acid from aqueous Effluent using supported Liquid Membrane

Amit Kumar, Kulkarni (2010) Extraction of Phenol and Citric acid from aqueous Effluent using supported Liquid Membrane. [Student Project Report]

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Abstract

This Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page.

Item Type: Student Project Report
Additional Information: In the present work, the extraction of citric acid from aqueous solutions through a SLM with aliquat 336 dissolved in toluene as a mobile carrier was studied with a simplified model. The overall mass transfer coefficients with and without carrier were measured by the time dependence of citric acid concentration in the feed side and used to get the mass transfer coefficient of citric acid transport, which was compared to a factor obtained from the simplified model? Liquid membrane (LM) processes are regarded as the most efficient method for the treatment of wastewater to extract phenol, o-nitro phenol and p-nitro phenol. The work on the LM was initiated by Li and further investigated by many researchers for the recovery of metal ions as well as organic compounds. Emulsion liquid membrane system (ELM), supported liquid membrane system (SLM), bulk liquid membrane system (BLM) are the most commonly used types of liquid membrane systems. In the present work, the SLM technique has been used, because it is having advantages than other two in respect to (i) active transport (ii) low energy consumption, (iii) high selectivity (iv) minimal loss of extract ant, (v) low LM requirement, and thus less amount of expensive extract ants and (vi) simple to operate and easy to scale up. Major advantage of LM over conventional separation technique is the simultaneous extraction and separation. In case of BLM extraction, it has its own set of demerits and thus it is rather difficult to upgrade the lab scale BLM to a pilot/ commercial scale BLM and in ELM extraction, many a time instability of the emulsion is observed due to swelling or change in the minute concentration of chemicals. In case of SLM, organic liquid is imbedded in the small pores of a polymer support and is retained by the capillary forces. The organic liquid separates aqueous feed and strip stream. The component can move through this liquid membrane from one phase to other by diffusion process due to the concentration gradient. Most of the time solvent used for the separation is toxic, hazardous and expensive. Instead, non-hazardous, cheap and easily available vegetable oils can be used in case of SLM. It has been demonstrated for the extraction of textile dye and rhodamine. A good amount of literature is available in the area of SLM, which speaks about its importance and continuous interest in the area among the research community. A few major works include extraction of metal ions, Citric and lactic acids, natural organic molecules such as drugs, phenol, sugars, and hydrocarbons. SLM was also used for the separation of citric and lactic acids in aqueous solutions.
Uncontrolled Keywords: aqueous effluent; Liquid membrane, wastewater treatment; extraction, citric acid; slm
Subjects: 600 Technology > 08 Food technology > 07 Food Engineering
600 Technology > 08 Food technology > 01 Analysis
Divisions: Food Engineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 10 Aug 2010 04:19
Last Modified: 28 Dec 2011 10:16
URI: http://ir.cftri.com/id/eprint/9593

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