Polyelectrolytes applied to remove methylene blue and methyl orange dyes from water via polymer-enhanced ultrafiltration

Polyelectrolyte–Dye Interactions: An Overview

“…While azure B bonded more strongly with sodium alginate, a more favorable interaction was observed between toluidine blue and sodium heparin. The interactions between poly(2-acrylamide-2-methyl-1-propanesulfonic acid) (PAMPS) and poly(diallyl dimethyl ammonium) chloride (PDDA) and the highly versatile cationic dyes methylene blue (MB) and methyl orange (MO) have been employed for the purification of colored wastewater by the polymer-enhanced ultrafiltration (PEUF) technique [ 6 ]. The maximum removal efficiency under optimal conditions (pH 6.0, initial MB and MO concentrations of 3.5 mg L −1 and 80 mg L −1 , respectively) was reported to be 98% and 90% for MB and MO, respectively, together with an ultrafiltration membrane (molecular weight cut off value: 10 kDa).…”

“…Recently, dyes encapsulated within polymer nanoparticles have been used for inkjet printing [ 5 ]. Polyelectrolyte membranes have also been widely used for the separation of dyes from wastewater by manipulating polyelectrolyte–dye interactions [ 6 ]. In all these cases, the materials are designed by exploring the molecular interactions between dyes and polyelectrolytes.…”

Enhanced performance of hydroxyl and cyano group functionalized graphitic carbon nitride for efficient removal of crystal violet and methylene blue from wastewater

“…Therefore, many studies focus on the removal of these dyes from wastewater. Membrane separation 6,7 , ultra-ltration 8,9 , chemical precipitation 10 , photo catalytic degradation 5,[11][12][13] and adsorption 4,5,14,15 are some of the techniques that have been studied to remove color from industrial effluents with the aim of reducing their environmental impact. Among these listed methods, adsorption is considered one of the most promising and wellused methods for the removal of dyes from contaminated water due to its high efficiency, simple operating design and low-cost implementation.…”

Efficient Adsorption of Methyl Orange on Nanoporous Carbon from Agricultural Wastes: Characterization, Kinetics, Thermodynamics, Regeneration and Adsorption Mechanism

“…Methyl orange (MeO) is one of the most widely used hazardous anionic azo dyes; its existence in an aquatic environment presents harmful effects to wildlife. Different methods can be used to remove the MeO dye from solutions, for example, advanced oxidation processes [12], photocatalytic degradation [13], polymer-enhanced ultrafiltration [14] and electrochemical degradation [15]. However, the above processes have disadvantages such as complexity, high operating cost and unit footprint.…”