Application of bipolar electrodialysis to the recovery of acids and bases from water solutions

An overview of the recovery of acid from spent acidic solutions from steel and electroplating industries

“…Cifuentes et al [108] used two lab scale electro-dialysis (EH) cells to study the effectiveness of this method in the recovery of sulphuric acid from copper containing electrolytes such as those present in copper electrorefining. Winniewski et al [109] studied the acid and base purification via bipolar electro-dialysis. Tongwen and Weihua [110] studied the simultaneous recovery of sulphuric acid and nickel from electrolysis of spent liquor of relatively low acid concentration by tuning the diffusion dialysis performance by surface cross-linking of poly(2,6-dimethy]-1,4-phenylene oxide) (PPO) anion exchange membrane.…”

“…The results indicated that HCl separation from rare earth strip solution was possible using VMD method (vacuum membrane distillation) with the recovery ratio of 80%. Wisniewski et al [109] studied the acid purification as well as base purification using bipolar electrodialysis. Bipolar electro-dialysis yielded an acid solution having concentration up to 51-fold (in case of hydrochloric acid) and 63-fold (in case of sulphuric acid) as compared to that obtained by conventional electro-dialysis.…”

Sulfuric acid recovery from acid mine drainage by means of electrodialysis

“…bipolar ED, electro-electrodialysis or distinct ED configurations) have been effectively used to recover sulfuric acid from various industrial wastewaters, such as nuclear decontamination effluents or rinsing waters used in metal electrorefining operations [8][9][10]. However, in the particular case of iron-containing AMD solutions, the speciation of iron entails the presence of various ionic species of different charge and mobility [1], thus adding a further complexity in the interpretation of the mechanisms of ionic transport through ion-exchange membranes.…”

Extraction‐Fermentation Hybrid (Extractive Fermentation)

“…There are mainly two types of ED available for separating carboxylic acids from fermentation broth. Conventional ED with cation-and anion-exchange membranes stacked between anode and cathode can concentrate and partially purify carboxylates (Figure 15.3a), whereas a three-compartment bipolar membrane electrodialysis (BMED) with additional bipolar membranes (BM), which split water into H + and OH − , stacked between cation exchange membranes (CAM) and anion exchange membranes (AEM), can produce concentrated free acid and base from salt (Figure 15.3b) (Bailly, 2002;Wiśniewski et al ., 2004). A simple two-compartment BMED with either CAM or AEM can also be used to convert carboxylates to carboxylic acids if the feed is relatively pure.…”