Extraction with emulsion liquid membranes in a hollow‐fiber contactor

Transport of mercury through liquid membranes containing calixarene carriers

“…[34]. Although a number of carriers for the transport of alkali and alkaline metal ions using BLMs have been used so far [34][35][36][37], relatively few carriers have been reported for the selective and efficient transport of heavy metal or mercury ions [13][14][15][16][17][18][19][20][38][39][40].…”

Use of Emulsions, Microemulsions, and Hollow Fiber Contactors as Liquid Membranes

“…Figure 2 is a schematic representation of ELM extraction in a hydrophobic HFC. Studies in our laboratory have shown the merit of ELM extraction in HFC (30). The extraction fluxes are comparable to a traditional stirred contactor (SC) ELM system (overall rates are slower due to smaller area on our lab-scale membrane module) but the separation efficiency is higher due to low swelling and leakage.…”

Emulsion Liquid Membrane Extraction in a Hollow-Fiber Contactor

“…Supported emulsion liquid membranes (SELMs) combine the advantages of emulsion liquid membrane separation and dispersion-free solvent extraction. In this design, an ELM carries out simultaneous extraction and stripping from the feed stream by a liquid-liquid, dispersion-free contacting in an HFC [14,15]. Fig.…”

“…The ELM extraction in a stirred contactor as described above has two main disadvantages [14]: (1) On prolonged contact with the feed stream, the emulsion swells with water, increasing the internal-phase volume. Water uptake (or swell) causes a reduction in the stripping reagent concentration in the internal phase, which in turn reduces the stripping efficiency.…”