Artículos de revistas
Prospects in cadmium-contaminated water : Management using free-living Cyanobacteria (Oscillatoria sp.)
Fecha
2021Registro en:
2073-4441
10.3390/w13040542
Autor
Carralero Bon, Iván
Salvatierra, Lucas Matías
Lario, Luciana Daniela
Morató Farreras, Jordi
Pérez, Leonardo Martín
Institución
Resumen
Abstract: In this study, the removal of cadmium (Cd) by free-living Oscillatoria sp. was studied. Our
results showed that maximal Cd removal efficiency (~60%) by the cyanobacterial culture was
achieved within 12–24 h in the presence of 5.0 or 25.0 mg/L of Cd. The mechanisms underlying this
phenomenon were explored by elemental analysis and FTIR-ATR spectroscopy. It was found that
metal adsorption by negatively charged functional groups in the cyanobacterial biomass was the
main mechanism used by Oscillatoria sp. to remove metal from the aqueous medium, followed by
Cd bioaccumulation into living cells. Additionally, Cd-exposed microalgae showed increased oxidative
stress (MDA formation), a decreased dehydrogenase activity, a higher amount of soluble
carbohydrates and a decreased total carotenoid concentration, as compared to the control cells.