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Received: 2004-02-09

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.3 P.171-174


Bioremediation potential of spirulina: toxicity and biosorption studies of lead

Author(s):  CHEN Hong, PAN Shan-shan

Affiliation(s):  Department of Environmental Engineering, Zhejiang University, Hangzhou 310013, China

Corresponding email(s):   hchen@tom.com, shan6027@126.com

Key Words:  Bioadsorption, Bioremediation, Spirulina, Lead

CHEN Hong, PAN Shan-shan. Bioremediation potential of spirulina: toxicity and biosorption studies of lead[J]. Journal of Zhejiang University Science B, 2005, 6(3): 171-174.

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This study examines the possibility of using live spirulina to biologically remove aqueous lead of low concentration (below 50 mg/L) from wastewater. The spirulina cells were first immersed for seven days in five wastewater samples containing lead of different concentrations, and the growth rate was determined by light at wavelength of 560 nm. The 72 h-EC50 (72 h medium effective concentration) was estimated to be 11.46 mg/L (lead). Afterwards, the lead adsorption by live spirulina cells was conducted. It was observed that at the initial stage (0–12 min) the adsorption rate was so rapid that 74% of the metal was biologically adsorbed. The maximum biosorption capacity of live spirulina was estimated to be 0.62 mg lead per 105 alga cells.

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