Lead, Nickel and Cadmium sequestrant capacity of lactic acid bacteria. A vibrational spectroscopy study

E. GERBINO; P. MOBILI; E.E. TYMCZYSZYN; C. ARAUJO-ANDRADE; RUI FAUSTO; A. GÓMEZ-ZAVAGLIA

Chiang Mai

Congreso; SPEC 2012, Shedding New Light on Disease; 2012

Lactobacillus kefir is a lactic acid bacterium isolated from kefir grains and several probioticproperties have been associated to its surface biomolecules [1-4].Cadmium, nickel and lead are relevant metals from a toxicological point of view. They are notdegradable and tend to accumulate in the exposed organisms causing serious health effects.Biosorption, the passive and energy-independent sorption of molecules onto the surface of anadsorbent such as inactivated microbial biomass, has shown to be an efficient tool to remove them.Several species of microorganisms, including lactic acid bacteria, have been successfully employedas biosorbents [5]. However, the molecular bases involved in this process have not been properlyexplored. For this reason, the aim of this work was to evaluate the bacteria/heavy metal interactionusing vibrational spectroscopic methods and taking into account the role of superficial biomoleculesin this process [4,6,7].