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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. 12, No. 6, 2015, pp. 1799-1810
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Bioline Code: st15168
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. 12, No. 6, 2015, pp. 1799-1810
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A low-cost sorbent for removal of copper ions from wastewaters based on sawdust/fly ash mixture
Cretescu, I.; Soreanu, G. & Harja, M.
Abstract
In the present work, a low-cost sorbent prepared
from mixed local conifer sawdust (SW) and fly ash
(FA) provided by a Romanian power plant was developed.
On the basis of the preliminary studies, both materials were
qualified as suitable sorbents for the removal of copper
ions; however, the sorption capacity and material structures
of the SW is influenced by the FA. Therefore, a sorbent
based on SW–FA mixture is proposed in this study for the
removal of copper ions to improve the efficiency of the SW
alone. The sorption capacity of the novel sorbent toward
Cu(II) ion removal from aqueous solution has been
investigated by employing the regression modeling techniques.
In order to describe the sorption equilibrium, the
obtained data were fitted using the classical isotherm
models. In addition, the experimental design and response
surface methodology have been applied for modeling and
optimization of the Cu(II) removal process. The operational
parameters used in the experimental design were as
follows: the initial copper concentration, pH of initial
solution and sorbent dose. The maximum removal efficiency
of Cu(II) was 79.56 %, which was experimentally
validated.
Keywords
Copper ions; Isotherm; Low-cost sorbent; Modeling; Optimization; Response surface methodology
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