The application of electrodialysis with ion-exchange membranes for treatment of sodium sulfate solutions

✍ Scribed by N.M. Smirnova; B.N. Laskorin; J.S. Mishukova; A.V. Borisov

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 297 KB
• Volume: 46
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(83)87156-2

✦ Synopsis

The pilot plant study was carried out and a two-stage electrodialysis process was developed for treatment of industrial waste waters containing sodium sulfate, which guarantees utilization of acid, alkali and reclaimed water. The dialysates are obtained with a salt concentration 2 /l (9% from feed solution) and. the brines with a salt content 2 E 05320 g/l on the first stage during desalination in a multicompartment electrodialyzer from the solutions, which contained about 20-40 g/l of sodium sulfate. Solutions of sulfuric acid and caustic soda with concentration 17-19% by weight are manufactured at the second stage in three-compartment electrodialysis stack from the brine.The highly selective membranes guarantee the content of sodium sulfate in both products less than 1%.