Polyacrylamide (Poly (AAm)) and poly(acrylamide-co-methyl methacrylate) (poly
(AAm-co-MMA)) hydrogels were synthesized by solution free radical
polymerization initiated by Potassium persulfate initiator (KPS) at
different feed mol monomer ratios and N,N-methylene bisacrylamide (BIS) as a
crosslinking agent. The obtained hydrogels were characterized by FTIR,
scanning electron microscopy (SEM) and swelling behaviour. The swelling
properties of Poly (AAm) and poly (AAm-co-MMA) hydrogels were studied in
distilled water at different pH. The effect of temperature on swelling
behaviour of these hydrogels has been analysed by variation from 25 to 50?C. Poly(AAm-co-MMA) hydrogels were considered for the removal of Red
Erionyl textile dyes from aqueous solutions. Two kinetics models were
applied; the first and the second order kinetics as well as the Freundlich
and Langmuir isotherms were tested. The result confirms that the adsorption
process of Red Erionyl dye follows second-order kinetics and their
equilibrium data were fitted well to the linear Langmuir model.
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