Adsorption and bonding strength of chromium species by ferrihydrite from acidic aqueous solutions.

ABSTRACT: The adsorption behavior of Cr(III) and Cr(VI) ions onto laboratory-synthesized 2-line ferrihydrite was investigated under a batch method as a function of initial chromium concentration (0.1-1000 mg L^-1) and pH (3.0 and 5.0). Moreover, the effect of the type of anion (chloride and sulfate) on Cr(III) adsorption was studied. The affinity of Cr(III) ions for the ferrihydrite surface depended on both the type of anion and pH of the solution and the maximum adsorption capacities decreased as follows: q (SO₄ ^2-, pH 5.0) > q (SO₄ ^2-, pH 3.0) > q (Cl^-, pH 5.0) > q (Cl^-, pH 3.0), and were found to be 86.06 mg g^-1, 83.59 mg g^-1, 61.51 mg g^-1 and 40.67 mg g^-1<

SUBMITTER: Dzieniszewska A 

PROVIDER: S-EPMC7293855 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature