Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10150294 | Comptes Rendus Chimie | 2018 | 14 Pages |
Abstract
In this research, the performance of a new biosorbent prepared using low-cost oak shell waste materials for consecutive removal of particular cations and chromate anions from aqueous solutions was studied. The adsorbent impregnated with Pb2+, Ag+, Ba2+, and Sr2+ was used to remove chromate anions by the formation of an appropriate insoluble precipitate. The biosorbent was characterized by FTIR, XRD, SEM, TG-DTG, and VSM techniques. The adsorption capacities of 133.84, 53.12, 50.12, and 40.39Â mg gâ1 were obtained for chromate for the samples containing Pb2+, Ag+, Ba2+, and Sr2+ cations, respectively. The chromate uptake was inversely proportional to the ksp of the chromate precipitate and increased with the cation content of the adsorbent. The adsorption process was kinetically fast and the equilibrium was established within 10 min. The experimental data were analyzed by the Langmuir, Freundlich, Sips, and Redlich-Peterson isotherm models. The data were fitted to the Langmuir isotherm, indicating that chromate was adsorbed homogeneously on the adsorbent surface.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Maryam Adibmehr, Hossein Faghihian,