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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(5) [September 2011] >
| Title: | Removal of Ni (II) from aqueous solutions by adsorption onto Cajanus cajan L Milsp seed shell activated carbons |
| Authors: | Thamilarasu, P
Sivakumar, P
Karunakaran, K |
| Keywords: | Activated carbon
Adsorption
Cajanus cajan L
Isotherm
Kinetics
Nickel(II) |
| Issue Date: | Sep-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The
adsorptive removal of Ni(II) from aqueous solution using Cajanus cajan L Milsp
seed shells activated carbon (CCC) and polypyrrole coated Cajanus cajan L Milsp
seed shells activated carbon (PPy/CCC) has been carried out under various
experimental conditions. Quantity of Ni(II) uptake at
50 mg of activated carbon is 25.75 mg/g for CCC and 29.60 mg/g for PPy/CCC.
Adsorption data are modeled with Freundlich, Langmuir and Temkin adsorption
isotherms. Thermodynamics parameters, such as  Ho, So,
and Go have been calculated and the findings indicate that the
adsorption is spontaneous and endothermic. Enthalpy change values range from
8.90 kJ/mol to 23.04 kJ/mol, and based on these values the adsorption of Ni(II)
by CCC could be a physisorption. A mechanism involving intra particle diffusion
and surface adsorption has been proposed for the adsorption of Ni(II) onto the
adsorbent. Adsorbent used in this study is also characterized by FT-IR and SEM
before and after the adsorption of metal ions. |
| Page(s): | 414-420 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.18(5) [September 2011]
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