These peaks were in
coincidence with Cd and Zn maxima. Nostoc ri6ulais showed more sensitivity to heavy metals than N. linckia, and accumulated
less amount of metal-binding proteins. Nostoc linckia seems to be tolerant to heavy metals (Zn and Cd) and is able to accumulate
this metal by adsorption on the pellets (cell surface) and/or through sequestration via metal-binding protein. Therefore it can be
recommended it to be employed in the purification of waste contaminated with these heavy metals