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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.19 [2012] >
IJCT Vol.19(6) [November 2012] >
| Title: | Use of gel-type weak acid resin for the adsorption of La(III) from aqueous solution |
| Authors: | Xiong, Chunhua
Rao, Chen |
| Keywords: | Adsorption kinetics
Equilibrium isotherms
Gel-type weak acid resin
Ion exchange
Lanthanum |
| Issue Date: | Nov-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The adsorption properties of a gel-type
weak acid resin (110-H) for La(III) have been studied with chemical methods. The effects of process variables, such as initial pH of solution, initial concentration of La(III), contact time and temperature, on
the adsorption of La(III))
have been studied using batch technique. The results show that the optimal
adsorption condition of GTWAR for La(III) is achieved at pH 5.0 in HAc-NaAc medium. The maximum uptake capacity of La(III) is found to be 263 mg/g resin at 298 K. The adsorption of La(III) follows the Langmuir isotherm better than Freundlich
isotherm, and the correlation coefficients have been evaluated. Even kinetics
on the adsorption of La(III)
has been studied. The thermodynamic parameters ΔS 121 J/(mol·K) and ΔH
16.4kJ/mol indicate the endothermic nature of the adsorption process. A
decrease in Gibb’s free energy with increasing temperature indicates the
spontaneous nature of the adsorption process. Finally, La(III) can be eluted by
using 0.5mol/L HCl solution and the gel-type weak acid resin can be regenerated
and reused. The sample is evaluated by IR
spectroscopy and thermogravimetric analysis.
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| Page(s): | 392-398 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.19(6) [November 2012]
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