Abstract: A membrane-wafer assembly comprises a core resin-wafer (RW) having a first ionexchange surface comprising a thin anionic ionomer layer (AIL) bonded thereto, and a second ion exchange surface comprising a thin cationic ionomer layer (CIL) bonded thereto; wherein the resin-wafer comprises cation exchange resin beads and anion exchange resin beads bound together with a polymeric elastomer. A resin-wafer electrodeionization apparatus comprising a plurality of the membrane-wafer assemblies, and a method of preparing the membrane-wafer assembly also are described.

Abstract: Disclosed herein is a sensor for measuring perfluoroalkyl acids and/or polyfluoroalkyl acids. The sensor includes a working electrode, a counter electrode and optionally a reference electrode. The working electrode includes a film disposed on the surface of the working electrode and the film includes a perfluorinated anion exchange ionomer. A method of using the sensor to detect perfluoroalkyl acids and/or polyfluoroalkyl acids is also described.

Abstract: Devices, systems, methods and/or processes based on or employing a reversible anion exchange polymer electrolyte membrane (AEM). A unitized membrane electrode assembly includes an anion exchange polymer electrolyte membrane disposed between a hydrogen electrode and an oxygen electrode. These electrodes each contain an anion exchange polymer electrolyte binder. The unitized membrane electrode assembly is effective in an alkaline environment for fuel cell operation and water electrolyzer operation.