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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(3) [May 2011] >
| Title: | Non-conventional low-cost adsorbent from Euphorbia antiquorum L for the removal of Direct Blue 53 from its aqueous solution |
| Authors: | Sivakumar, P
Palanisamy, P N |
| Keywords: | Euphorbia antiquorum L
Activated carbon
Adsorption
Surface area
Desorption |
| Issue Date: | May-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | This paper reports the adsorption potential
of activated carbon prepared from Euphorbia
antiquorum L wood by H3PO4 impregnation in batch mode
experiments. The effects of various process controlling parameters such as
solution pH, adsorbate concentration and temperature are analyzed. Maximum of
58.40 mg/g of dye adsorbed at a pH of 2.0 and the adsorption decreases with
increase in pH. Various kinetic and isotherm models are employed to analyze the
feasibility and mechanism of adsorption. The prepared adsorbent removed 145.45
mg/g of dye at an initial dye concentration of 100 mg/L and the kinetics obeys
pseudo second order. Freundlich isotherm fits exceptionally well with good r2 value. Thermodynamic
parameters like  G°, H° and S° are evaluated. The positive enthalpy proves that the adsorption
process is endothermic in nature. Experiments are also performed for recovery
of dye loaded carbon through regeneration as a function of pH, the maximum
desorption occurs at a pH of 10 is only 19.29%. The prepared sorbent can be
conveniently employed for the colour removal as its adsorptive capacity is
comparable with commercial adsorbents. |
| Page(s): | 188-196 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.18(3) [May 2011]
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