Decolorization of dye solutions by continuous ultrafiltration

✍ Scribed by Katarzyna Majewska-Nowak; Tomasz Winnicki

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 493 KB
• Volume: 60
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(86)80005-4

✦ Synopsis

A method of decolorizing and concentrating aqueous solutions of organic dyes in an ultrafiltration process is described. The process involved polysulfone membranes prepared from 15% (wt.%) polysulfone solution in dimethylformamide and formed on a glass support. The experiments were carried out under static and dynamic conditions for five organic dyes of a molecular weight ranging from 327 to 1048.2. The pressure applied was 1.5 MPa. Membranes exhibiting the best properties are capable of retaining 90 to 100% of organic dyes of a molecular weight above 700 during their work under dynamic conditions. The measured volume fluxes through these membranes ranged from 0.08 to 0.18 m3 /m2 day.