Superabsorbent magnetic Fe3O4-based starch-poly (acrylic acid) nanocomposite hydrogel for efficient removal of dyes and heavy metal ions from water

Abstract

Aimed to removal of toxic dyes and heavy metal ions, the magnetic Fe3O4-based starch- poly (acrylic acid) nanocomposite hydrogel (Fe3O4@St-AcANCH) is designed and synthesized using free radical method. The main procedure for the synthesis of superabsorbent nanocomposite hydrogel is chemical crosslinking of starch and poly (acrylic acid). The as-prepared nanocomposite hydrogel present high removal percentage toward Cu(II), Pb (II), MV and CR solution through a spontaneous physic-sorption process that have a good consistence with pseudo-second-order and Langmuir isotherm models. It is indicated that nanocomposite hydrogel is an effective adsorbent for removal of dyes and metal ions which would provide a new platform for water and environmental considerations. Finally, the swelling properties and mechanical parameters of the prepared adsorbents were investigated preliminarily.