Removal of Cd(II) from Aquatic System Using Oscillatoria sp. Biosorbent

Biosorption of Cd(II) ions from aqueous solutions by native and dried Oscillatoria sp. Cyanobacterium biomass was investigated in the batch mode. The Oscillatoria sp. was prepared from Molecular and Cell Laboratory of University of Mazandaran and grown in BG-11 medium. A comparison of Cd(II) adsorpt...

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Bibliographic Details
Published in:TheScientificWorld 2012-01, Vol.2012 (2012), p.1-7
Main Authors: Azizi, Seyed Naser, Hosseinzadeh Colagar, Abasalt, Hafeziyan, Seyede Maryam
Format: Article
Language:English
Subjects:
Adsorption
Algae
Aquatic environment
Aqueous solutions
Binding sites
Biochemistry
Biodegradation, Environmental
Biomass
Bioremediation
Biosorption
Cadmium
Cadmium - metabolism
Computer simulation
Cyanobacteria
Environmental impact
Hazardous materials
Heavy metals
Ion concentration
Metal concentrations
Metal ions
Metals
Methods
Molecular chains
Oscillatoria
Oscillatoria - metabolism
pH effects
Pretreatment
Properties
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Summary:Biosorption of Cd(II) ions from aqueous solutions by native and dried Oscillatoria sp. Cyanobacterium biomass was investigated in the batch mode. The Oscillatoria sp. was prepared from Molecular and Cell Laboratory of University of Mazandaran and grown in BG-11 medium. A comparison of Cd(II) adsorption properties of dried with native Oscillatoria sp. biomass was made, the dried one showed a higher biosorption capacity and faster kinetic. The influence of solution pH, contact time, biomass concentration, initial metal ion concentration, and presence of coions using dried Oscillatoria sp. biomass as well as pretreatment on the biosorption capacity of the biomass were studied. Various pretreatments of Oscillatoria sp. increased biosorption of Cd(II) at pH 7 in comparison with native biomass. However, heating at 100°C in a water bath showed significant improvement in Cd(II) biosorption capacity. The experimental biosorption data was well fitted to the Freundlich model compared to the Langmuir model, and the amount of Cd(II) removed from solution increased with increasing Cd(II) concentration. In addition, the dried biomass was investigated for Cd(II) removal from the simulated real sample containing about 14 mg/l Cd(II) at pH 7, under the same experimental condition.
ISSN:2356-6140
1537-744X
1537-744X
DOI:10.1100/2012/347053