International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
Vol. 11, No. 4, 2014, pp. 1027-1034
Bioline Code: st14101
Full paper language: English
Document type: Research Article
Document available free of charge
International Journal of Environment Science and Technology, Vol. 11, No. 4, 2014, pp. 1027-1034
© International Journal of Environment Science and Technology
Uptake of Indosol Dark-blue GL dye from aqueous solution by water hyacinth roots powder: adsorption and desorption study|
Khan, Md. M. R.; Mukhlish, M. Z. B.; Mazumder, M. S. I.; Ferdous, K.; Prasad, D. M. R. & Hassan, Z.
Adsorption characteristics of water hyacinth
roots powder for the removal of Indosol Dark-blue GL dye
were investigated in batch mode. Operating variables, such
as initial solution pH, presence of detergent, adsorbent
dosage, initial concentration and contact time, were studied.
The results showed that the adsorption of dye increased
with increasing the initial concentration and contact time.
The adsorption is highly pH dependent and adsorption
capacity increased with decrease in pH. Kinetic study
revealed that the uptake of Indosol Dark-blue GL was very
rapid within the first 15 min and equilibrium time was
independent of initial concentration. Batch equilibrium
experiments were carried out at different pH and found that
equilibrium data fitted well to Langmuir isotherm model.
The maximum sorption capacity of the adsorbent was
found as 86 mg g-1 at pH 3 which reduced to 64 mg g-1
at pH 5. The presence of detergent reduced the sorption
capacity of the adsorbent significantly. Using equilibrium
and kinetic data, the forward and backward rate constants
were determined from the unified approach model.
Desorption study revealed that the dye can be recovered by
swing the pH from low to high.
Water hyacinth roots powder; Langmuir model; Unified approach model; Detergent; Indosol Dark-blue GL
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