Remediation and resource utilization of chromium(III)-containing tannery effluent based on chitosan-sodium alginate hydrogel

Efficient removal of Cr(VI) from aqueous solutions using chitosan/Na‐alginate bio‐based nanocomposite hydrogel

“…[14][15][16] More specifically, the hydrogels composed of green polymeric materials like starch, cellulose, alginate and chitosan displayed exceptional abilities to remove heavy metal ions from effluents because of the dense functional groups and high swelling capacity. [17][18][19][20] Sodium alginate Na-Alg is a naturally occurring polymer extracted from brown algae. 21 Na-Alg has high numbers of carboxyl and hydroxyl active groups, thus, it is very suitable for hydrogel formation.…”

Natural polyphenol tannin-immobilized composites: rational design and versatile applications

“…Among the various methods, adsorption is considered one of the preferred methods for the removal of contaminants from water by virtue of its high efficiency, good reversibility, and easy operation. 15,59,311 Tannin, a biomass material with a low cost and variety of sources, is one of the best candidates for capturing contaminants by adsorption technology. Moreover, the immobilization of tannin on water-insoluble substrates results in the formation of tannin composite adsorbents, which have several advantages such as easy separation and convenient regeneration, being widely employed to remediate contaminants, especially heavy metals (Table 1), in water.…”

Chitosan-based oral colon-specific delivery systems for polyphenols: recent advances and emerging trends

“…145 Similarly, ionotropic gelation/PEC is another technique for producing chitosan hydrogels, where cross-linking is usually achieved using polysaccharides, small anionic molecules, and metallic anions. 140 The most widely used anions for cross-linking chitosan are sodium alginate, 146 polyacrylic acid, 147 heparin, 148 and polyglutamic acid. 149 Wu et al 150 prepared hydrogels based on chitosan and sodium alginate via electrostatic interactions for the delivery and protection of lysozyme.…”