Bioremediation potential of spirulina: toxicity and biosorption studies of lead

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.

作 者： CHEN Hong PAN Shan-shan   作者單位： Department of Environmental Engineering, Zhejiang University, Hangzhou 310013, China  刊 名： 浙江大學學報B（英文版）  SCI 英文刊名： JOURNAL OF ZHEJIANG UNIVERSITY(SCIENCE)  年，卷(期)： 2005 6B(3)  分類號： X172  關鍵詞： Bioadsorption   Bioremediation   Spirulina   Lead