Interaction of lead(II) with β-cyclodextrin in alkaline solutions

β-Cyclodextrin stabilized magnetic Fe3S4 nanoparticles for efficient removal of Pb(ii)

“…The surface β-CD with hydroxyl groups may partially be responsible for the enhanced adsorption performance. 38 The as-prepared nanoparticles showed a considerably higher adsorption capacity for Pb (II), in comparison to previous reported adsorbents, such as Fe 3 S 4 hollow spheres (92.1 mg g -1 ), 26 Fe 3 O 4 /cyclodextrin polymer nanocomposites (64.5 mg g -1 ), 39 MWCNTs/Fe 3 O 4 nanocomposites (41.77 mg g -1 ), 40 and MWCNTs/ iron oxides/CD nanostructures (12.29 mg g -1 ). 8 These results indicated that the β-CD stabilized Fe 3 S 4 could be a prospective adsorbent for Pb (II) removal in contaminated water due to its easyseparation and efficient-adsorption.…”

Interaction of pyridine-2,5-dicarboxylic acid with heavy metal ions in aqueous solutions

“…In the acidic to neutral pH range, the precipitating compound could be a Pb(II) complex with Hpdca − . In alkaline solutions the precipitation of insoluble Pb(OH) 2 [20]. This system was not investigated further.…”

Interaction of pyridine‐ and 4‐hydroxypyridine‐2,6‐dicarboxylic acids with heavy metal ions in aqueous solutions

“…The spectral characteristics of the complexes mentioned vary. The molar extinction coefficient value of Cudipic 2− 2 (ε = 60) is higher than that of Cu(II)-pyridine-2,5-dicarboxylate complex (ε = 47 [42]), absorption maximum being 775 and 650 nm [46], respectively.…”