Integration of ion exchange and electrodeionization as a new approach for the continuous treatment of hexavalent chromium wastewater

Current–voltage characteristics in a hybrid electrodialysis–ion exchange system for the recovery of cesium ions from ammonium molybdophosphate-polyacrylonitrile

“…When the voltage was increased, current density was observed to be zero up to 1.8 V. The voltage applied up to 1.8 V was utilized in charging the electrodes and the membranes. Similar phenomenon was observed by Avardo et al [30] in their experiments for removal of chromium from wastewater. In the first region, current density increased linearly with applied voltage; this is termed as ohmic region in conventional electrodialysis.…”

Synthesis of perfluorinated ionomers and their anion exchange membranes

“…Over the past decades, anion exchange membranes (AEMs) have been widely used on a large industrial scale in processes such as ion-exchangers [1,2], water purification [3,4], electrodialysis, chlorine-alkaline production and for seawater desalination [5][6][7]. More recently, there has been increasing interest in the use of AEMs in research of anion-exchange membrane fuel cells (AEMFCs) [8][9][10], which own many advantages over proton exchange membrane fuel cells (PEMFCs) such as, facile oxidation of fuels, faster reduction kinetics of oxygen and relatively simple water management (water generated at the anode and consumed at the cathode) [11][12][13].…”

Membrane-free electrodeionization using strong-type resins for high purity water production

“…Three main regions appeared in the V-I curve, and the corresponding turning points of current density were 50 A/m 2 and 130 A/m 2 , respectively. The low current density region (Region I) contained a high resistance represented the electrical transport region of salt ions; whereas the high current density region (Region III) had a low resistance represented the water dissociation region in MFEDI [2,25,26]. A curvature region (Region II) existed between those two linear regions (Region I and Region III), which demonstrated the water dissociation in MFEDI took place and became dominant gradually due to the insufficient migration number of salt ions [10,25].…”