Toxic metal biosorption by macrocolonies of cyanobacterium Nostoc sphaeroides Kützing

Copper removal efficacy and stress tolerance potential of Leptolyngbya sp. GUEco1015

“…Similar result was found in Anabaena cylindrica, Anabaena spiroides, Microcystis aeroginosa [ 75 ], Aulosira fertilissima [ 76 ], Nostoc sp. [ 7 ], Nostoc sphaeroides [ 77 ] etc., where maximum removal and absorption of copper was observed at 25 °C. Further, other cyanobacterial members like Anabaena sphaerica [ 78 ], Anabaena variabilis [ 79 ] , Calothrix paritiana [ 80 ] , Gloeocapsa calcarea HH-1 [ 81 ], Hapalosiphon schmidlei [ 80 ] could also remove some other heavy metals at 25 °C.…”

Degradation and remediation of environmental pollutants by algae

“…Biosorption is an energy-independent process that keeps pollutants on the cell surface [22] through various mechanisms, such as chelation /complexation, ion exchange, surface precipitation and adsorption [23]. Biosorption can occur either in living algae cells or in dead organisms because cell receptors remain active after cell death [24]. In addition, removal efficiency can be improved by chemical treatment, for example, base-modified algae biomass increases the functional groups of major actors in the biosorption mechanism [25].…”

Cyanoremediation of heavy metals (As(v), Cd(ii), Cr(vi), Pb(ii)) by live cyanobacteria (Anabaena variabilis, and Synechocystis sp.): an eco-sustainable technology

“…The presence of negative charges on the exopolysaccharide (EPS) producing cyanobacteria is also considered promising for the removal of positively charged HMs from aqueous solution. 18,19 Polysaccharides, proteins, lipids, and other polyelectrolytes are the primary components of the cyanobacterial cell wall, and the presence of different functional groups forms negative charges on the cell wall to form coordination complexes with metal ions. 20 Cyanobacteria can remove HMs by active and passive processes.…”