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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. 7, 2016, pp. 1803-1814
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Bioline Code: st16168
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. 7, 2016, pp. 1803-1814
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Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom
Ghorbani-Khosrowshahi, S. & Behnajady, M. A.
Abstract
In this research, the stems of Onopordom
Heteracanthom which is a kind of weed were converted to
biochar particles, and their characteristics were investigated.
The morphology and purity of these particles were
examined by SEM and EDX techniques, respectively.
Specific surface area was obtained as 5.73 m2 g-1 by BET
method. The biochar particles obtained from Onopordom
Heteracanthom were evaluated as an adsorbent to remove
Cr(VI) from aqueous environments. The effect of some
parameters such as initial concentration of Cr(VI), dosage
of adsorbent, and pH were investigated on the adsorption
capacity of Cr(VI) onto the adsorbent. The equilibrium data
were analyzed by various isotherm models. The results
revealed that in this process, the adsorption isotherm and
kinetics have more conformity with Langmuir isotherm
and pseudo-second-order kinetics, respectively. The multilinearity
of the Weber and Morris adsorption kinetic model
indicates that the intra-particle diffusion is not merely the
rate-controlling step for the whole adsorption process.
Keywords
Adsorption; Biochar; Cr(VI); Onopordom Heteracanthom
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