Biosorption of lead and copper by heavy-metal tolerant Micrococcus luteus DE2008.
Micrococcus luteus DE2008 has the ability to absorb lead and copper. The effect of these metals on biomass and viability of this microorganism were investigated and removal of the metals from culture media was determined. Lead had no effect on the biomass expressed as mg Carbon/cm(3) of M. Iuteus DE2008, but in the case of copper, the minimum metal concentration that affected the biomass was 0.1 mM Cu(II). According to these results this microorganism shows a greater tolerance for lead. The minimum metal concentration that affected viability (expressed as the percentage of live cells) was 0.5 mM for both metals. M. luteus DE2008 exhibited a specific removal capacity of 408 mg/g for copper and 1965 mg/g for lead. This microorganism has a greater ability to absorb Pb(II) than Cu(II). M. luteus DE2008 could be seen as a microorganism capable of restoring environments polluted by lead and copper.
Department of Genetics and Microbiology, Biosciences Faculty, Universitat Autònoma de Barcelona, Edifici C-Campus de UAB, Bellaterra 08193, Barcelona, Spain.
Zully M
ZM
Puyen
Eduard
E
Villagrasa
Juan
J
Maldonado
Elia
E
Diestra
Isabel
I
Esteve
Antoni
A
Solé
D000222:Adaptation, Physiological; D000327:Adsorption; D001673:Biodegradation, Environmental; D018533:Biomass; D001704:Biopolymers / Q000737:chemistry; D003300:Copper / Q000302:isolation & purification* / Q000633:toxicity; D005110:Extracellular Space / Q000737:chemistry; D050296:Microbial Viability; D016982:Micrococcus luteus / Q000166:cytology / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D015032:Zinc / Q000302:isolation & purification* / Q000633:toxicity
D001704:Biopolymers; D003300:Copper; D015032:Zinc