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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(1) [January 2011] >
| Title: | Removal of arsenic (III) ions from aqueous solution using Aspergillus flavus isolated from arsenic contaminated site |
| Authors: | Maheswari, S
Murugesan, A G |
| Keywords: | Aspergillus flavus
As (III) ion
Biosorption
Kinetic models
Sorption performance
Adsorption isotherms |
| Issue Date: | Jan-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The biosorption of As(III) ions onto the dry biomass
of Aspergillus flavus isolated from the arsenic contaminated soil has
been studied. The arsenic resistant fungal mycelia of Aspergillus flavus
is used for the removal of As (III) ions from aqueous solution in the
concentrations range of 50-500 mg/L. The effect of initial As (III) ions
concentration (50-500 mg/L), pH (3, 4, 5) and temperature (25, 30, 35ºC) on
arsenic removal has been investigated. The biosorption of As (III) ions by the
biosorbent at different pH and temperature is increased as the initial
concentration of As (III) ions is increased in the medium. The biosorption
equalization is established in about 240 min and the amount of adsorbed As
(III) ions do not change further with time. The maximum biosorption of As (III)
ions by Aspergillus flavus is
obtained at pH – 5. The maximum biosorption occurred at 35ºC. The As (III) ions
adsorption data were analyzed using the first and the second order kinetic
models. The experimental results fitted that the second-order kinetic model is
the most appropriate equation to predict the biosorption capacity of Aspergillus
flavus. Langmuir and Freundlich isotherms are used to evaluate the data and
the regression constants are derived. Biosorption equilibrium data are best
described by Freundlich isotherm model followed by Langmuir model. |
| Page(s): | 45-52 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.18(1) [January 2011]
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