Adsorption of heavy metal cations by organic ligands grafted on porous materials

Functionalized SBA-15 mesoporous silica by melamine-based dendrimer amines for adsorptive characteristics of Pb(II), Cu(II) and Cd(II) heavy metal ions in batch and fixed bed column

“…It is generally accepted in the literature that metal cations seek out O-, N-or S-containing organic ligands [5,[18][19][20]. Pb(II), Cu(II) and Cd(II) are the borderline metals with ambivalent properties [17] that show a good affinity with aminopropyl-containing ligands [10,21]. Researchers have used ligands containing multi-amine groups in a chain [5,21,22] or ligands involving dendrimer-amines [20] to increase removal efficiency of these cations into the NPS pores.…”

“…Pb(II), Cu(II) and Cd(II) are the borderline metals with ambivalent properties [17] that show a good affinity with aminopropyl-containing ligands [10,21]. Researchers have used ligands containing multi-amine groups in a chain [5,21,22] or ligands involving dendrimer-amines [20] to increase removal efficiency of these cations into the NPS pores. Melamine-based dendrimer amines (MDAs) are such ideal dendrimer ligands due to intensively binding amine sites and also to their enhanced hydrophilic silica surface compared to analogous adsorbents.…”

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

“…In addition, the presence of free electron pairs on amine group within mesopores of MCM-48 materials should lead to sorptive properties for weak acidic organic compounds in water [22]. Researchers have used ligands containing multi-amine groups in a chain [23,24] or ligands involving dendrimer-amines [25] to increase removal efficiency of these compounds into the mesoporous structure. Melamine-based dendrimer amines (MDAs) are such ideal dendrimer ligands due to intensively binding amine sites and also to their enhanced hydrophilic silica surface compared to analogous adsorbents.…”

Sorption of toxic metal ions in aqueous environment using electrospun polystyrene fibres incorporating diazole ligands

“…The ability of resins Vasiliev et al, 2009), porous materials (Heidari et al, 2009;Aguado et al, 2009), bentonite (Mishra and Patel, 2009), alumina (Ezoddin et al, 2010, biomass (Gundogdu et al, 2009;Hamissa et al, 2010;Mapolelo et al, 2005;Miretzky et al, 2010;Sari and Tuzen 2009;Tang et al, 2010), sediments (Oh et al, 2009), substituted naphthalene (Rezaei et al, 2009), metal hydroxides (Bologo et al, 2012) and natural clinoptilolites (Mamba et al, 2009) to adsorb heavy metal ions from aqueous solutions has been reported. Most of the reported sorbents exhibited low loading capacities as well as sensitivities.…”