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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 8, 2016, pp. 2045-2056
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Bioline Code: st16187
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 8, 2016, pp. 2045-2056
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Adsorption of Cd ions from aqueous solutions by iron modified pomegranate peel carbons: kinetic and thermodynamic studies
Abedi, M.; Salmani, M. H. & Mozaffari, S. A.
Abstract
The experimental conditions for preparation of
pomegranate peel carbon and Fe(III) modified pomegranate peel carbon were studied. The effects of main
experimental parameters on carbon preparation such as
carbonization time, carbonization temperature and Fe(III)
impregnation ratio in pomegranate peel were investigated.
The prepared carbons in various conditions were characterized by consideration of the production yield, ash content, iodine number, pH of zero point charge and their
ability for adsorption of methylene blue. After preparation
of carbons, their efficiency for removal of Cd2+ species
from aqueous solution was investigated. The effect of
experimental parameters such as Cd2+ initial concentration, pH of solution and contact time was studied by batch
adsorption experiments. The fitting of experimental data in
thermodynamic isotherms matched the linear results with
Langmuir and Freundlich isotherms. The adsorption
capacity for Cd2+ species on Fe(III) modified pomegranate
peel carbon was 22.72 mg/g and the adsorption kinetic
presented the pseudo-second-order kinetic model.
Keywords
Pomegranate peel carbon; Iron modified carbon; Cadmium removal; Adsorption isotherm; Cadmium adsorption
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