Adsorption of Hg2+, Cu2+ and Zn2+ ions from aqueous solution using formaldehyde cross-linked modified chitosan–thioglyceraldehyde Schiff's base

Synthesis of silica gel supported salicylaldehyde modified PAMAM dendrimers for the effective removal of Hg(II) from aqueous solution

“…The functionalization of amine group with salicylaldehyde have deserved particular attention as the resulting schiff base ligands are known to form stable complexes with metal ions readily, and may give rise to particularly potential adsorbent for Hg(II) [26,27]. So far, no work has been published on the synthesis and application of silica gel supported salicylaldehyde modified PAMAM dendrimers for the removal of Hg(II) from aqueous solution.…”

Facile fabrication of chitosan/poly(vinyl amine) composite beads with enhanced sorption of Cu2+. Equilibrium, kinetics, and thermodynamics

“…The main disadvantage of CS is its solubility in acidic pH, which makes impossible its reuse in adsorption processes. To solve this problem, chemical cross-linking is adopted [10][11][12][13]. Usually, the sorption capacity (SC) decreases by covalent cross-linking of CS compared with pristine CS, the main reason being that many amine groups are involved in the cross-linking reaction.…”

ChiBio: An Integrated Bio-refinery for Processing Chitin-Rich Bio-waste to Specialty Chemicals

“…Due to its polycationic nature, it has excellent flocculation properties and can also be used as chelating agent. It binds a variety of metal ions like Hg 2+ , Cu 2+ , or Zn 2+ [38], dyes [39], hydrocarbons [40], and organic residues in wastewater and effluent sludge [41]. Organic-as well as mineral-contaminated water can be cleared, and in combination with its biodegradability, chitosan is often the method of choice.…”