We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Adsorption of zinc (II) onto MnO<sub>2</sub>/CS composite: equilibrium and kinetic studies.
- Authors
Dinh Van-Phuc; Le Ngoc-Chung; Nguyen Van-Dong; Nguyen Ngoc-Tuan
- Abstract
In this work, manganese dioxide/chitosan (MnO2/CS) was used to remove Zn(II) from an aqueous sample over a concentration range of 30-100 mg/L, adsorption time of 15-180 min, and pH of 2-5. The maximum sorption (>80%) was achieved at pH 4 after 80 min with an initial concentration of 50 mg/l and 0.1 g of MnO2/CS. The experiment data were analyzed using the non-linear Freundlich, Lang-muir, Redlich-Peterson, Sips, Temkin and Dubinin-Radushkevich (D-R) isotherm models. Langmuir isotherm offers maximum sorption capacity (qm) of 24.21 mg/g (RMSE = 1.575 and c = 0.8034), while the Temkin and Dubinin-Radushkevich (D-R) isotherm models indicated that adsorption followed a physical process. Furthermore, kinetic studies showed that the adsorption processes partially followed the pseudo-second-order equation. In addition, intra-particle diffusion model was used to ascertain the sorption process mechanism. MnO2/CS has also been used to remove Zn(II) from the wastewater produced by the galvanized iron manufacturing industry.
- Subjects
CHITOSAN; GALVANIZED iron; ADSORPTION (Chemistry)
- Publication
Desalination & Water Treatment, 2017, Vol 58, Issue 1, p427
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2017.11432