Accumulation of lead by free and immobilized cyanobacteria with special reference to accumulation factor and recovery.

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Chakraborty N, Banerjee A, Pal R

Accumulation of lead by free and immobilized cyanobacteria with special reference to accumulation factor and recovery.

Bioresour Technol. 2011 Mar;102(5):4191-5. doi: 10.1016/j.biortech.2010.12.028. Epub 2010 Dec 13.

PubMed ID

21195608 [ View in PubMed

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Abstract

Lead accumulation by free and immobilized cyanobacteria, Lyngbya majuscula and Spirulina subsalsa was studied. Exponentially growing biomass was exposed to 1-20mg L(-1) of Pb(II) solution at pH 6, 7 and 8 for time periods ranging from 10 min to 48 h. L. majuscula accumulated 10 times more Pb (13.5 mg g(-1)) than S. subsalsa (1.32 mg g(-1)) at pH 6 within 3h of exposure to 20mg L(-1) Pb(II) solution and 76% of the Pb could be recovered using 0.1M EDTA. This chelator (2 muM) did not influence Pb accumulation whereas 100 muM citrate increased that of S. subsalsa 6- to 8-fold. L. majuscula filaments enmeshed in a glass wool packed in a column removed 95.8% of the Pb from a 5mg L(-1) Pb solution compared to free and dead biomass which removed 64 and 33.6% Pb respectively. A 92.5% recovery of accumulated Pb from the immobilized biomass suggests that repeated absorption-desorption is possible.

DrugBank Data that Cites this Article

Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
Edetate calcium disodium anhydrous	Lead	Small molecule	Humans	Unknown	Chelator	Details
Edetate disodium anhydrous	Lead	Small molecule	Humans	Yes	Chelator	Details
Edetic acid	Lead	Small molecule	Humans	Yes	Chelator	Details