Abstract
Abstract Being polymers and electrolytes, polyelectrolytes are widely used in many applications. In perspective of dye removal from textile effluents, they have been used in coagulation–flocculation and to a lesser extent in polyelectrolyte enhanced ultrafiltration. To optimize the abovementioned process we need to study in detail the interaction of dye with polyelectrolyte in conditions near the industry reality. In this context we investigate herein the effect of chemicals additives, NaCl, surfactant, pH on the behavior of two model cationic dyes, methylene blue (MB) and toluidine blue (TB), with polyacrylic acid polymer (PAA). Using spectrophotometric method it was found that the poly(acrylic acid) induced metachromasy in the dyes resulting by the blue shift of the absorbance confirming the formation of dye polymer complexes. The stoichiometry of MB–PAA and TB–PAA complexes determined by the ratio method was found to be 2:1. The stability constant of the complexes at 298 K was found to be 5332 for MB–PAA and 4358 dm3 mol−1 for TB–PAA and the amount of additives inducing total destabilization of the complex were determined.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry and Photobiology A: Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
