Separation properties of surface modified silica supported liquid membranes for divalent metal removal/recovery

Exploration of heavy metal ions transmembrane flux enhancement across a supported liquid membrane by appropriate carrier selection

“…The supported liquid membranes (SLMs) technique has received considerable attention over the past few decades because they offer a lot of advantages over conventional separation technologies, such as easy operation, low capital and operating costs, low energy consumption, continuous operation, high selectivity, relatively high fluxes, combination of extraction, stripping and regeneration processes into a single stage, uphill transport against concentration gradients and small amounts of extractants (Sirkar, 1997;Gumi et al, 2003;Di Luccio et al, 2000;Cooper et al, 2004). SLM has been demonstrated as an effective tool for the selective separation and recovery of resources from dilute solutions, particularly for the removal and recovery of toxic metals, e.g.…”

Nanomagnetite-loaded poly (acrylamide-co-itaconic acid) hydrogel as adsorbent for effective removal of Mn2+ from contaminated water

“…Different techniques used for the removal of toxic metal ions from contaminated wastewater are filtration [20], chemical precipitation [21], chemical coagulation [22], flocculation [23], reverse osmosis [24], solvent extraction [25], membrane separation [26][27][28], ion exchange [29], and adsorption. The efficiency of most of these methods was found to be less due to less removal of heavy metals at very low concentrations, high operational cost, and contamination of recipient environment by their secondary effluent impact [30][31][32][33].…”

Increasing lithium extraction performance by adding sulfonated poly (ether ether ketone) into block‐copolymer ethylene vinyl alcohol membrane

“…Attempts to stabilize liquid membranes have failed mainly as a consequence of the weak solvent stability of porous organic materials . Inorganic membranes have been reported as substrates owing to their excellent solvent resistance, but acid/base resistance and high mass transfer resistance have hindered further commercial interest …”

“…[10][11][12][13][14][15] Inorganic membranes have been reported as substrates owing to their excellent solvent resistance, but acid/base resistance and high mass transfer resistance have hindered further commercial interest. 16 We have identified a new configuration, termed 'membrane extraction', in which water and organic phases flow on both sides of a membrane that allows ions to diffuse freely, but blocks the direct contact between organic and aqueous phases. By contrast with a conventional liquid membrane, the membrane is intrinsically hydrophilic, and thus water-swollen and ion-permeable.…”