Radiation synthesis of superabsorbent hydrogels based on carboxymethyl cellulose/sodium alginate for absorbent of heavy metal ions from waste water

Abstract

Superabsorbent hydrogels based on natural polymer, carboxymethyl cellulose (CMC)/ sodium alginate (SA) were prepared by 60 Co radiation as a source of initiation of crosslinking. The effect of different ratios of SA (20, 30, 40, and 50%) on the physical properties of the CMC/SA hydrogel such as gel fraction percentage (GF%), and swelling percentage (SW%) were investigated. It was found that the GF % decreases with increasing SA content in the hydrogel. While the SW% of CMC/SA hydrogel tends to increase with increasing SA content in the hydrogel at constant irradiation dose (2.5 kGy). Morphology of the hydrogels was examined using scanning electron microscopy, which indicates compatibility between CMC and SA. Thermal properties were also investigated using thermogravimetric analysis. It was found that the thermal properties of the hydrogel having different composition were almost the same. The results obtained from ultraviolet-visible spectrophotometric analysis show that the prepared hydrogels can be used in the removal of heavy metals from waste water. The ability to absorb these heavy metals is of great importance from the point of view of environmental pollution.

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

“…30) [319]. Gamma radiation proved to be very efficient for the crosslinking of polysaccharides, such as carboxymethyl cellulose (CMC) [321], CMC combined with starch [322], acrylic acid and starch [323], CMC and sodium alginate [324], hyaluronic acid and chondroitin sulfate [325] carboxymethylchitosan [326]. The chemical structure and size of the polysaccharide chains, the polysaccharide concentration, radiation dose and atmosphere can affect the crosslinking process.…”

Radiation synthesis of polyvinyl alcohol/acrylic acid/magnesium oxide composite hydrogel for removal of boron from its aqueous solution

“…The use of gamma radiation for preparing of different types of adsorbent polymers and hydrogels is considered as wide field of important applications of radiation technology that can be used in environmental applications. [14][15][16][17][18][19][20][21][22] hydrolysed) was provided by Lobachemie Pvt. Ltd, Mumbai, Maharashtra, India.…”

“…The use of gamma radiation for preparing of different types of adsorbent polymers and hydrogels is considered as wide field of important applications of radiation technology that can be used in environmental applications. 14–22…”

Development of β-Cyclodextrin-Cellulose/Hemicellulose-Based Hydrogels for the Removal of Cd(II) and Ni(II): Synthesis, Kinetics, and Adsorption Aspects

“…27 Microcrystalline cellulose (MCC)-based hydrogel loaded with MnO 2 is used to remove lead from wastewater. 28 Carboxymethyl cellulosebased hydrogels like poly(vinyl alcohol)−CMC 25 and CMC− sodium alginate 24 are used to remove Ni(II). Godiya et al reported CMC/polyacrylamide-based hydrogel for the removal of Cd(II) and other metal ions.…”