Synthesis and Characterization of Poly (Acryl Amide - Maleic Acid) Hydrogel: Adsorption Kinetics of a Malachite Green from Aqueous Solutions

Abstract

Poly (acrylamide-maleic acid) hydrogel synthesized via free radical polymerization of
acrylic acid and maleic acid as monomers, using N,N-methylene bis acryl amide as
cross-linker and potassium persulfate as initiator. The synthesized hydrogel was
described by Fourier transform infrared spectroscopy (FTIR), field emission scanning
electron microscopy (FE-SEM), Thermogravimetric analysis (TGA) and UV-visible
spectroscopy. The synthesis hydrogel was used as adsorbents for removal of a cationic
dye, malachite green (MG) from aqueous solution. The synthesized adsorbents showed
high efficiency in removal of malachite green and a very high adsorption capacity. The
results showed the adsorption equilibrium time was reached in 60 min and the
adsorption method is found the direct pseudo second order kinetics.