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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. 12, 2015, pp. 3755-3766
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Bioline Code: st15351
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. 12, 2015, pp. 3755-3766
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Optimization and evaluation of CBSOL LE red wool dye adsorption from aqueous solution onto commercial activated carbon
Kaur, P.; Singh, A. P.; Prince, A. K. & Kushwaha, J. P.
Abstract
Adsorptive removal of CBSOL LE red wool
dye form aqueous solution onto commercial activated
carbon (CAC) was investigated in a batch system. Various
process parameters like pH, dosage of CAC (m) and
adsorption time (t) were considered and optimized with full
factorial central composite design under response surface
methodology. At optimized parameters, kinetic and thermodynamic
studies were performed and adsorption equilibrium
data were represented using Freundlich, Langmuir
and Redlich–Peterson (R–P) isotherm models. Also, diffusivity
was calculated for the rate-limiting step in the
adsorption process. Optimum process parameters were
found to be m = 2.92 g/100 ml, t = 6.75 h and
pH = 3.95, and at these optimized parameters, % removal
of CBSOL LE red wool dye (Y) was found to be 86 %.
Pseudo-second-order kinetic was found to best fit the
adsorption kinetic data. Freundlich and R–P isotherms
were found to best represent the equilibrium adsorption
data. Diffusivity for the intra-particle diffusion was found
to be 9.676 × 10-8 and 1.396 × 10-8 m2/s at initial concentration
of CBSOL LE red wool dye (C0) of 50 and
100 mg/l, respectively.
Keywords
CBSOL LE red wool dye; Commercial activated carbon; Adsorption kinetics; Isotherms; Diffusivity; Response surface methodology
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