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- Title
Kinetic, isotherm and thermodynamic studies on biosorption of chromium(VI) by using activated carbon from leaves of Ficus nitida.
- Authors
Ali, Ismat; Alrafai, H.
- Abstract
Background: Kinetics, thermodynamics and equilibrium of the removal of chromium(VI) ions from aqueous solutions by using chemically activated leaves of Ficus nitida were investigated. Adsorption runs were performed as a function of pH, mass of biosorbent, contact time, initial concentration of chromium(VI) ions and temperature. Results: The optimum conditions for maximum removal of chromium(VI) ion from aqueous solutions (about 99 %) were found to be 0.80 g of chemically activated leaves of F. nitida, 25 min, 50.0 mg/L of initial concentration of chromium(VI). Values of thermodynamic activation parameters proved that the biosorption process is spontaneous and endothermic. Results were analyzed by using Langmuir, Freundlich and Temkin models. Conclusions: Results of the study showed that the chemically activated leaves of F. nitida can be used as low cost, ecofriendly and effective sorbent for the removal of chromium(VI) from aqueous solutions.[Figure not available: see fulltext.]
- Subjects
ATMOSPHERIC temperature; CHROMIUM; FICUS (Plants); ADSORPTION (Chemistry); LEAVES
- Publication
Chemistry Central Journal, 2016, Vol 10, Issue 1, p1
- ISSN
1752-153X
- Publication type
Article
- DOI
10.1186/s13065-016-0180-1