Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/13033
Title: Influence of <i>Ficus religiosa</i> leaf powder on bisorption of cobalt
Authors: Krishna, B
Venkateswarlu, P
Keywords: Biosorption
Cobalt
<i>Ficus religiosa</i>
Thermodynamics
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: The batch-wise biosorption of cobalt by <i style="">Ficus religiosa</i> (peepul) leaf powder has been carried out. The optimum biosorbent dosage is 60 g/L for an equilibrium agitation time of 90 min. Percentage removal of cobalt is increased from 70.9 to 97.2 (0.96 to 1.45 mg/g) with decrease in acidity in the <i style="">p</i>H range from 2 to 7. The experimental data are well represented by Freundlich (<i style="">n</i>=0.42, <i style="">K<sub>f</sub></i>=0.83 L/g, <i style="">R<sup>2</sup></i>=0.948), Langmuir (<i style="">R<sub>L</sub></i>=0.566, <i>q</i><sub>m</sub>= 3.60 mg/g, <i style="">R<sup>2</sup></i>=0.991), Redlich-Peterson(<i style="">R<sup>2</sup></i>=0.98) and Temkin (<i style="">R<sup>2</sup></i>=0.98, b<sub>T</sub> =784.52) isotherms, indicating favourable biosorption. The biosorption of Co(II) is described by the pseudo-second order rate equation (<i style="">K</i>=0.418 g/mg-min, <i style="">R<sup>2</sup></i>=0.99) preferably than first order rate equation (<i style="">R<sup>2</sup></i>=0.89). The biosorption is exothermic, irreversible and spontaneous.
Description: 381-390
URI: http://hdl.handle.net/123456789/13033
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.18(5) [September 2011]

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