Adsorption of cationic dyes on poly(acrylic acid‐co‐sodium acrylate‐co‐acrylamide) superabsorbents

Abstract

Inverse suspension polymerization was carried out to synthesize poly(acrylic acid-co-sodium acrylateco-acrylamide) superabsorbent polymers (SAPs) crosslinked with ethylene glycol dimethacrylate (EGDMA). The equilibrium swelling capacities of the SAPs, determined by swelling them in DI water, were found to vary with the acrylamide (AM) content. The SAPs were used to adsorb four cationic dyes (Acriflavine, Auramine-O, Azure-I and Pyronin-Y). The effect of AM content in the SAPs on the adsorption of the cationic dyes was investigated. Different initial concentrations of Azure-I were used with the same amount of the SAP to explore the effect of initial dye concentration on the adsorption. The effect of the adsorbent amount was investigated by taking different amounts of SAP with a fixed initial concentration of Acriflavine. The kinetics of the dye adsorption was modeled by a first order model and the equilibrium amount of the dye adsorbed, adsorption rate coefficients, removal efficiency and partition coefficients were determined.

Adsorption of anionic dyes on a reversibly swelling cationic superabsorbent polymer

“…The adsorption of ACG, CR, IC, and OG also followed the first‐order kinetics. Similar first‐order adsorption kinetics has been observed for the adsorption of cationic dyes on acrylic acid/acrylamide based SAPs 8. The plots of amount of dye adsorbed and dye concentration with time for the adsorption of IC on the SAP are shown in Figure 6(a) and (b), respectively.…”

“…Although most of the commercially used SAPs are anionic based on acrylic acid monomer,8 cationic SAPs may be useful in the field of water purification for the removal of anionic impurities. Cationic hydrogels of poly( N , N ‐diethylamino ethyl methacrylate) (PDEAEMA) crosslinked with ethylene glycol dimethacrylate,9 epichlorohydrin crosslinked hydroxyl propyl cellulose hydrogel,10 and poly(vinyl alcohol) and carboxymethyl cellulose copolymer hydrogels synthesized by electron beam irradiation11 have been used for the adsorption of anionic dyes.…”

Photophysics of Auramine O adsorbed on solid clays

“…Fluorescent probes can be used to investigate the adsorption behavior of clays and evaluate the properties of various microheterogeneous systems [7][8][9][10][11].…”

Modeling of Competitive Ultrasonic Assisted Removal of The Crystal Violet and Aura Mineo using Mwcnts Functionalized by N-(3-Nitrobenzylidene)-Nˊ-Trimethoxysilylpropyl-Ethane-1,2-Diamine:Equilibrium, Kinetics and Thermodynamic Study

“…... (12) Where k dif is the intraparticle diffusion rate constant (mg/(g. min 1/2 )) and C shows the boundary layer thickness. The linear form of Elovich model is generally expressed as 60 :…”

“…AO, and its hydrochloride salts are used for coloring paper, textiles and leather 10 . International Agency for Research on Cancer (IARC) expressed more evidence of carcinogenicity ability of AO among chemicals related to its bio-transformation to reactive species in target organs of rats and humans 11,12 .…”