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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Jan 2012, 33 (1)                                     Back


nstantaneous and historical temperature effects on a-pinene

Removal of heavy metals by biosorption using freshwater

alga Spirogyra hyalina

 

Author Details

 

J.I. Nirmal Kumar

(Corresponding author)

P.G. Department of Environmental Science and Technology, Institute of Science and Technology

for Advanced Studies and Research (ISTAR), Vallabh Vidya Nagar - 388 120, India

e-mail: istares2005@yahoo.com

 

Cini Oommen

P.G. Department of Environmental Science and Technology, Institute of Science and Technology

for Advanced Studies and Research (ISTAR), Vallabh Vidya Nagar - 388 120, India

 

 

 

Publication Data

Paper received:

11 March 2010

 

Revised received:

25 February 2011

 

Accepted:

07 March 2011

 

Abstract

The use of biosorbents for heavy metal removal has revealed enormous potential of algae for biosorption. The dried biomass of Spirogyra hyalina was used as biosorbent for removal of cadmium (Cd), mercury (Hg), lead (Pb), arsenic (As) and cobalt (Co) from aqueous solutions at different initial concentrations of the heavy metals and contact time of the biomass. The results showed that highest amount of Cd, Hg and As was adsorbed when the initial heavy metal concentration was 40 mg l-1 whereas Pb and Co exhibited greatest removal at 80 mg l-1. The value of Freundlich model constant (1/n) for different metals ranged from 0.342 to 0.693 and the values of Langmuir separation factor values (RL) varied between 0.114 and 0.719 that indicated favorable biosorption by the biomass. The order of metal uptake for the dried biomass was found to be Hg>Pb>Cd>As>Co. The finding of the study revealed that dried biomass of S. hyalina has much potential as a biosorbent for the sorption of Cd, Hg, Pb, As and Co.

 

Key words

Biosorption, Heavy metals, Isotherms, Spirogyra hyalina

 

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