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Membrane Water Treatment
  Volume 9, Number 2, March 2018 , pages 87-94
DOI: https://doi.org/10.12989/mwt.2018.9.2.087
 


Binding of Methylene Blue to two types of water soluble polymer and its removal by polyelectrolyte enhanced ultrafiltration
Nadia Cheickh Mansour, Hedia Ouni and Amor Hafiane

 
Abstract
    The interactions of water soluble polymers with dye are studied by ultrafiltration using a molecular weight cut off of 10 KDa regenerated cellulose ultrafiltration membrane. Two water-soluble polymers, namely Poly (Sodium-4 Styrenesulfonate) (PSS) and Poly (Vinyl Alcohol) (PVA) were selected for this study. The effects of process parameters, such as, polyelectrolyte concentrations, transmembrane pressure, ionic strength and pH of solution on dye retention and permeation flux were examined. PSS enhanced ultrafiltration achieved dye retention as high as 99% as a result of complexation between polyanion containing aromatic groups and cationic dye. This result was confirmed by the red shift. The retention of dye decreases as the salt concentration increases, a high retention was obtained at pH above 4. However, in case of PVA, relatively low retention (50%) was observed. Ionic strength and pH has no significant effect on the removal of MB. The permeate flux depended slightly on polyelectrolytes concentrations, transmembrane pressure, salt concentration and pH.
 
Key Words
    dye; poly(Sodium-4 Styrenesulfonate) (PSS); poly(Vinyl Alcohol) (PVA); dye retention; polymer enhanced ultrafiltration.
 
Address
Nadia Cheickh Mansour and Amor Hafiane: Wastewater Treatment Laboratory, Water Research and Technologies Center, Soliman, Tunisia

Hedia Ouni:1.) Department of Chemistry, Faculty of Science at Yanbu, Taibah University Yanbu, Medina Mounawara, Saudi Arabia
2.) Wastewater Treatment Laboratory, Water Research and Technologies Center, Soliman, Tunisia
 

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