The development of separation processes with reduced energy consumption and minimal environmental impact is critical for sustainable operation. In our studies of solvent resistant membranes, separations results for several model solutes and solvents in silicone type NF membranes show strong dependence of solvents on organic solute separations. Extensive pervaporation studies with zeolite membranes for the recovery of DMF other solvents from water in pharmaceutical streams will also be discussed, and an overview of solvent-based membrane applications and hybrid systems dealing with food and pharmaceutical streams will be presented. The second part of presentation deals with functionalized (such as, with polypeptides and other macromolecules) MF membranes for tunable flux and separations. In contrast with traditional pressure-driven membrane systems (RO, NF), such systems can provide selective ion separations (at very low pressures) from dilute solutions and tunability through pore macromolecule conformation changes and charge.
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