The effective recovery of praseodymium from mixed rare earths via a hollow fiber supported liquid membrane and its mass transfer related

Separation of Cd(II) from industrial wastewater via HFSLM: Equilibrium, kinetic and thermodynamic investigation

“…This led to an increase in the formation of cadmium complex species and increased flux [12]. When the pH value was greater than 5.5, extraction and stripping decreased slightly because some of the Cd(II) ion was precipitated and blocked the pores of the hollow fiber modules [23].…”

Roles of Facilitated Transport Through HFSLM in Engineering Applications

“…For environmental-related applications, membrane separation has developed into an important technology for separating volatile organic compounds (VOCs), e.g., acetaldehyde, BTXs, ethylene oxide, trichloroethylene, etc and other gaseous air pollutants from gas streams (Schnelle and Brown, 2002;Simmon et al, 1994). The following works show the applications of using HFSLM and the role of facilitated transport in separation of praseodymium from nitrate solution of mixed rare earths RE(NO 3 ) 3 (Wannachod et al, 2011), separation of uranium from trisodium phosphate from monazite ores processing (Lothongkum et al, 2009) supplied by the Rare Earth Research and Development Center, Office of Atoms for Peace, Bangkok, Thailand, and separation of Cu(II) by LIX84I.…”

“…This chapter describes transport mechanisms in HFSLM and shows some applications with reference to our up-to-date publications, for example -the effective extraction and recovery of praseodymium from nitrate solutions of mixed rare earths, RE(NO 3 ) 3 . Mass transfer phenomena in the system, the extraction equilibrium constant (K ex ), distribution ratio (D), permeability coefficient (P), aqueousphase mass-transfer coefficient (k i ) and organic-phase mass-transfer coefficient (k m ) were reported (Wannachod et al, 2011). -the enhancement of uranium separation from trisodium phosphate (a by-product from monazite processing) by consecutive extraction with synergistic extractant via HFSLM (Lothongkum et al, 2009).…”

Solvent extraction performance of Pr (III) from chloride acidic solution with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (EHEHPA) by using membrane dispersion micro-extractor

“…With an advantage of combining extraction and stripping in a single operation, liquid membrane separation technique, especially hollow fiber supported liquid membrane, was studied for the rare earth element solvent extraction process (Wannachod et al, 2011;Pei et al, 2011;Ramakul et al, 2012;Belova et al, 2014). By impregnating the extractant into the polymer beads and resin, the polymer beads and resin have been used to recover or separate rare earths (Sun et al, 2008;Sun et al, 2009;Lee et al, 2010;Yadav et al, 2013).…”