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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.11 [2004] >
IJCT Vol.11(6) [November 2004] >
| Title: | Kinetic and equilibrium characterization of phenols adsorption onto a novel activated carbon in water treatment |
| Authors: | Varghese, Sumol
Vinod, V P
Anirudhan, T S |
| Keywords: | Adsorption
kinetics
activated carbon
phenols
water treatment |
| Issue Date: | Nov-2004 |
| Publisher: | CSIR |
| IPC Code: | B01D 15/02 |
| Abstract: | The present
study envisages the use of an aquatic plant material, water hyacinth to prepare
a novel activated carbon for the removal of phenol, p-chlorophenol and p-nitrophenol
from simulated wastewaters by adsorption process. The effect of pH, contact
time, initial concentration of adsorbate and temperature on removal process was
investigated. The maximum removal of phenols from their aqueous solutions
occurred at pH 6.0. The applicability of the intraparticular mass transfer
diffusion kinetic model in each case of phenol, p-chlorophenol and p-nitrophenol
was studied separately at different concentrations and temperatures. Kinetic
parameters as a function of concentration and temperature were evaluated to
predict the nature of adsorption. The adsorption process was found to be
exothermic and the adsorption of phenols was found to follow the order: p-nitrophenol > p-chlorophenol > phenol. Equilibrium adsorption data were
correlated with Langmuir, Freundlich and Redlich–Peterson adsorption isotherm
models. Freundlich isotherm model was found applicable to represent the adsorption
data for all three adsorbates. The maximum adsorption capacity of activated
carbon was found to be 1.20, 1.28 and 1.35 mmol/g for phenol, p-chlorophenol and p-nitrophenol respectively. Adsorbed phenols on activated carbon
were recovered (91.5– 96.3%) using 0.05 M sodium hydroxide. The petroleum
refinery industry wastewater sample was treated by activated carbon to
demonstrate its efficiency in removing phenols from wastewaters. |
| Page(s): | 825-833 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.11(6) [November 2004]
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