Removal of heavy metals from model wastewater by using carboxymehyl cellulose/2‐acrylamido‐2‐methyl propane sulfonic acid hydrogels

Abstract

A series of functional copolymer hydrogels composed of carboxymethyl cellulose (CMC) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) were synthesized using c-radiations-induced copolymerization and crosslinking. Preparation conditions were optimized, and the swelling characteristics were investigated. The ability of the prepared hydrogels to recover some toxic metal ions from their aqueous solutions was studied. The prepared hydrogel showed a great capability to recover metal ions such as: Mn þ2 , Co þ2 , Cu þ2 , and Fe þ3 from their solutions. The data revealed that the chelating ability of the prepared hydrogels is mainly dependent on their internal composi-tion, in addition to the physical properties of the metal ion solution such as pH and metal ion concentration. The data show that the chelating ability of the prepared hydrogels increases by increasing the AMPS content in the hydrogel as well as the increment in the pH of the solution and the metal ion concentration. The prepared CMC/AMPS copolymer hydrogels are chemically stable enough to be reused for at least five times with the same efficiency.

Chitosan/Xanthan Gum Based Hydrogels as Potential Carrier for an Antiviral Drug: Fabrication, Characterization, and Safety Evaluation

“…Sulfonate groups of monomer AMPS undergo ionization or deprotonation at pH value of 7.4, which is higher than the pKa value of AMPS. Presence of ionized sulphonate groups increases charge density on polymeric network, thus creating strong electrostatic repulsion among its ionized -SO3-groups and producing greater expansion of the polymeric network (El-Hag Ali, 2012). This leads toward reduction or loss of intermolecular hydrogen bonding and consequently increasing the swelling dynamics of synthesized hydrogel structure (Bao et al, 2011).…”

Cellulose-Based Hydrogels for Wastewater Treatment: A Concise Review

“…The pH at the point of zero charge (pH PZC ) is a critical parameter for the adsorption process that can change the chelating ability of adsorbents by affecting their swelling ability and interactions between adsorbents and ions [ 156 ]. When the pH < pH PZC, the adsorbent surface is positively charged because of an increase of H + concentration in the aqueous solution (protonation).…”

“…The typical pH used for optimum metal adsorption on CBH materials is about 5.0–6.0 [ 160 , 178 , 179 ]. Recently, Amr El-Hag Ali [ 156 ] investigated the adsorptive nature of CMC as a function of solution pH for the removal of heavy metals such as Co 2+ , Cu 2+ , Fe 3+ , and Mn 2+ from wastewater. Results showed that the adsorption capacity of CMC HGs increases at higher pH values.…”

4‐Phenyl‐3‐thiosemicarbazide Modified Magnetic Nanoparticles: Synthesis, Characterization and Application for Heavy Metal Removal

“…Frequent applications of heavy metals in different areas of industry together with their toxic effects on human life have spurred the demand for development of novel techniques for effective removal of heavy metal ions from industrial wastes. Various types of materials such as ion exchange resins , hydrogels , biomimetic compounds , biopolymers , activated carbon , and nano‐sized materials have been employed for the removal of these toxic metal ions.…”