International Nuclear Information System (INIS) Comparing electrodialysis, electro electrodialysis and diffusion dialysis The use of ion-selective membranes for the recovery of sulphuric acid out of contaminated solutions. The process enables electrodialysis processing options for products that are sensitive to pH changes. This buffer process serves to control the hydrogen ion or hydroxide ion concentration so as to protect the active sites of electrodialysis membranes. The buffer solution is regenerated continuously after depletion. The process entails adding a buffer solution to the stack for subsequent depletion in the stack during electrolysis. ![]() Hryn, John N [Naperville, IL Daniels, Edward J [Orland Park, IL Krumdick, Greg K [Crete, ILĪ new method for improving the efficiency of electrodialysis (ED) cells and stacks, in particular those used in chemical synthesis. The combination of electrodialysis (ED) and brackish water reverse osmosis (BWRO) is presented as an alternative desalination strategy for seawater reverseĮlectrodialysis operation with buffer solution The suitability of ED for seawater desalination was investigated and we quantified the energy losses that play a role in electrodialysis. ![]() Seawater predesalination with electrodialysis It combines the recovery of the plating chemicals from rinse water, the elimination of metallic impurities from the process and rinse water treatment in one step. Wessling, MatthiasĮlectro-electrodialysis is a promising technology for chromic acid recovery and static rinse water purification. Pilot scal process, development, and optimizationįrenzel, I. GustavĬhromic acid recovery by electro-electrodialysis. Short recommendations are derived for the up-scale of the two techniques. In field contaminated soil, electro-osmosis results in 35% PAH removal whereas electrodialysis results in 79%. In spiked soil, electro-osmosis achieves up to 85% while electrodialysis accomplishes 68% PAH removal. Results show a large discrepancy in the removal rates between spiked soil and long-term field contaminated soil, as expected. Two surfactants were used: the non-ionic surfactant Tween 80 and anionic surfactant sodium dodecyl sulphate (SDS) to aid desorption of PAHs from the soil. The efficiency of the techniques is studied using these two soils, having been subjected to different PAH contact times. The latter is applied for the first time for the removal of PAH. The two techniques at focus are electro-osmosis and electrodialysis. The present work aims at studying two electroremediation techniques for the removal of PAHs from a spiked natural silt soil from Saudi Arabia and a silty loam soil from The Netherlands which has been exposed to tar contamination for over 100. ![]() Polycyclic aromatic hydrocarbons (PAH) are persistent and toxic contaminants which are difficult to remove from fine porous material like clayey soils. Assessing PAH removal from clayey soil by means of electro-osmosis and electrodialysis
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