SAMARIUM PERTRACTION BY EMULSION LIQUID MEMBRANE CONTAINING D2EHPA AND CYANEX 272 AS CARRIER

سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 395

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شناسه ملی سند علمی:

ICOGPP04_159

تاریخ نمایه سازی: 13 شهریور 1396

چکیده مقاله:

Samarium as a rare earth element is playing a growing important role in different industries. Traditional methods for extraction of rare earth metals such as ion exchange and solvent extraction have disadvantages of high investment and high energy consumption. Emulsion liquid membrane (ELM) as an improved solvent extraction technique is an effective transport method for separation of various compounds from aqueous solutions by using lower amounts of solvent which make it beneficial from economic and environmental prospective. This method can be used for the separation of olefin/paraffin and wastewater treatment in petrochemical industry. In this work, the pertraction of samarium from nitric acid medium across ELM using D2EHPA and Cyanex272 as the carrier extractants and Span 80 as the surfactant in kerosene as the diluent and nitric acid as the internal phase has been systematically investigated. The effect of three different process parameters including carrier concentration, feed phase pH, and surfactant concentration on samarium pertraction has been investigated and optimum conditions has been determined. It was found that mixture of carriers is more effective than D2EHPA and Cyanex272 alone and the synergistic effect of the carriers improves samarium pertraction in the ELM. Maximum extraction of samarium was achieved with 0.75 M of an equimolar mixture of D2EHPA and Cyanex272, feed phase pH of 4, and 2.5% Span 80 (v/v) liquid membrane at a phase ratio of 10 for a feed containing 50 mg/L samarium. It was also found that the extraction efficiency improves with time and maximum extraction of 98.6% was achieved at pertraction time of 10 min.

کلیدواژه ها:

Cyanex 272 ، D2EHPA ، Emulsion Liquid Membrane (ELM) ، Pertraction ، Samarium

نویسندگان

M Raji

Center for Separation Processes Modeling and Nano-Computations, School of Chemical Engineering, University of Tehran, Tehran, Iran,

H Abolghasemi

Center for Separation Processes Modeling and Nano-Computations, School of Chemical Engineering, University of Tehran, Tehran, Iran,

J Safdari

Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran

A Kargari

Membrane Processes Research Laboratory, Department of Petrochemical Engineering, Amirkabir University of Technology, Tehran, Iran