Abstract
Abstract In this work, a novel mixed matrix membrane (MMM) was fabricated by Non-solvent induced phase inversion of the blend of polysulfone (PSF) with a boron selective resin (BSR) and used for boron removal. The membrane surface chemical composition was characterized by ATR-FTIR and XPS. The membrane morphology was observed by FESEM, AFM and BET measurements. The effects of BSR content on boron adsorption properties were studied in detail. Addition of BSR leads to rougher and more hydrophilic membrane surface and higher permeation flux. The boron uptake increases obviously with the BSR content and has the maximum over 2.0 mmol/g. The membrane shows S-type isotherm and the adsorption kinetics can be well described by the pseudo-first-order model. Compared with the polymeric resin, the PSF/BSR membrane shows similar boron uptake but much higher adsorption rate. With a membrane of 1.76 cm2, a boron removal efficiency as high as 97.6% can be obtained for 10 mL of 5 mg/L boron solution in the flow-through experiment at flux rate of 25 L/m2·h. It is concluded that the MMM can combine the advantage of the resin on high uptake and that of the membrane on convective transport.
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