Removal of malachite green by nanocomposite hydrogels based on arabic gum and cobalt phosphate from aqueous solution

In this work, nanocomposite hydrogels containing cobalt phosphate nanoparticles were prepared by co-precipitation process. The hydrogel was prepared based on arabic gum, acryl amide (Am), and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) by free radical polymerization using methylene bisacrylamide (MBA) as a crosslinker agent and ammonium persulfate (APS) as an initiator. The nanocomposite hydrogel was applied for removal of malachite green from aqueous solution. The structure of the hydrogel and nanocomposite hydrogel were characterized by FT-IR spectroscopy, thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The experimental results indicate that the nanocomposite hydrogels have high adsorption capacity for effective removal of malachite green. The adsorption isotherm of the nanocomposite hydrogels could be described very well by the Langmuir equation.

Keywords:

Nanocomposite hydrogel , Malachite green , Arabic gum , Acryl amide