International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
Vol. 11, No. 6, 2014, pp. 1581-1590
Bioline Code: st14154
Full paper language: English
Document type: Research Article
Document available free of charge
International Journal of Environment Science and Technology, Vol. 11, No. 6, 2014, pp. 1581-1590
© Copyright 2014 - International Journal of Environment Science and Technology
Removal of copper ions from aqueous solution using silica derived from rice straw: comparison with activated charcoal|
Sharaf, G. & Hassan, H.
The batch removal of copper(II) ions from
aqueous solution under different experimental conditions
using alkali-leached silica and activated charcoal was
investigated in this study. The copper(II) uptake was
dependent on varying time, pH, copper concentration and
temperature. Copper sorption was found fast reaching
equilibrium within 1 h with better performance for alkalileached
silica than charcoal. Copper sorption was low at low
pH values and increased with rise in initial pH-value until
6.7. Sorption fits well the Langmuir and Freundlich equations
with higher uptake by increasing temperature.
According to Langmuir equation, the maximum uptake of
Cu(II) ions by alkali-leached SiO2 and charcoal was found to
be 242.5 and 94.4 mmol/g at temperature 60 °C and pH 6.
Thermodynamic studies confirm that the process was spontaneous
and endothermic nature. Kinetic data for Cu(II)
sorption was found to follow pseudo-second-order model.
Removal; Copper; Alkali-leached silica; Activated charcoal
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