Adsorption of Cu(II), Hg(II), and Ni(II) ions by modified natural wool chelating fibers

Adsorption of Cu(II), Co(II), and Ni(II) ions by modified magnetic chitosan chelating resin

“…The buffer solutions used for adjusting the pH of the medium were KCl/HCl (pH 1, 2, and 3) which was not a buffer system, but it was successfully used to adjust the pH in many of the previous reports [5,6]; acetic acid/sodium acetate (pH 4 and 5); and Na 2 HPO 4 /KH 2 PO 4 (pH 6 and 7).…”

“…However, these methods are limited by high operational cost and/or may also be inefficient in the removal of some toxic metal ions, mainly at trace level concentrations [1,6].…”

Adsorption of Cr(VI) and As(V) ions by modified magnetic chitosan chelating resin

“…2) which was not a buffer system, but it was successfully used to adjust the pH in many of the previous reports [21,22], 0.1 M HCl and 0.1 M potassium hydrogen phthalate (KHPh) for pH range (3,4), 0.1 M potassium hydrogen phthalate (KHPh) and 0.1 M NaOH for pH range (5.0-7.0).…”

Preparation and characterization of chelating fibers based on natural wool for removal of Hg(II), Cu(II) and Co(II) metal ions from aqueous solutions

“…The pH values selected in the experiments were prior to the precipitation limit of the metal ions (pH 6) as reported in previous reports [25,26]. As shown in Fig.…”