Abstract
The objective of this work is to develop an anion sorbent that could offer chemically recognizable affinity with orthophosphite (H2PO3-) species from a binary aqueous solution containing hypophosphite (H2PO2-) as another solute. The macroreticular network, poly(calcium acrylate−divinylbenzene) [P(CaAc−DVB)], has been synthesized and identified to possess the desired chemical selectivity in this separation process. The resin takes advantage of the Lewis acid property of calcium ion, which shows different affinity with the two phosphite species. The P(CaAc−DVB) resin has the spherical shape (d = 0.1−0.3 mm); it was synthesized initially from the polymerization of divinylbenzene and methylacrylate (DVB/MA) in a suspension system. The porosity and pore-size distribution of the beads were adjusted primarily through the variation of the molar ratio DVB/MA and the use of a specific porogen system. The porous structure was found to be crucial for the accomplishment of high sorption efficiency and the preferred ch...
Published Version
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