An Assessment of Chromium (VI) Removal from Aqueous Solution Using Gelatin/PAAm-based IPN Hydrogels

In this work, gelatin (G)-polyacrylamide (PAAm)-based interpenetrating polymer network (IPN) hydrogels involving maleic acid (MA) was prepared using by radical polymerization. Full-IPN and semi-IPN were synthesized glutaraldehyde ethylene glycol dimethacrylate (EGDMA) as a crosslinker. The water absorbency of investigated, the values increased with MA G. chemical structures full-IPN tested Fourier Transform Infrared Spectroscopy (FTIR). Morphological test done Scanning Electron Microscope/ Energy Dispersive X-ray (SEM/EDX). Thermal properties examined Differential scanning calorimeter (DSC) analyzer Thermogravimetric analysis (TGA). mechanical performed Zwick Universal Testing Machine. stabilities hydrogel higher than semi-IPN. efficiency adsorption parameters (contact time, initial feed concentration, pH) on Chromium (VI) ion adsorbing property also determined. Isotherms explained Langmuir or Freundlich equations. According to results both isotherms, it can be said that surface homogeneous, occurred in monolayer.