By Surbhi JainAug 31 2022Reviewed by Susha Cheriyedath, M.Sc. In an article recently published in the journal Scientific Reports, researchers discussed the bioremediation of Nb-MXene using green microalgae.
Scientists and engineers worldwide are interested in environmentally friendly ways to degrade organic contaminants and remove heavy metal ions. However, inorganic crystalline contaminants have a low water solubility and little susceptibility to different biotransformations, making bioremediation techniques challenging.
Initial attachment of single and few-layered MXene nanoflakes to microalgal surfaces resulted in a moderate inhibition of algal growth. Over time, however, the microalgae oxidized the Mxene nanoflakes and further broke them down into NbO and Nb2O5. Following 72 hours of water treatment, further microalgal recovery was possible because these oxides, which were not poisonous to microalgal cells, ingested Nb-oxide nanoparticles through an absorption process.
The suggested theory stated that Nb-based MXenes were broken down by microalgae into harmless chemicals due to surface-related physicochemical interactions, allowing for further algal recovery. The degradation of Nb-based MXenes occurred due to physicochemical interactions between microalgae cells and MXene during the bioremediation process by microalgae. Nb-MXene nanoflakes initially appeared to adhere to the surface of the microalgae, significantly slowing their development.
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