SUMMARY: Bioremediation of Lead
Chen, H. Pan, S. (2005). Bioremediation potential of spirulina: toxicity and biosorption studies of lead. Journal of Zhejiang University SCIENCE, 6B(3):171-174
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 mm. The 72 h-EC50 (72 h medium effective concnetration) was estimated to be 111.46 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.