Exploring Periphytic Biofilms as Nature's Cleanup Crew for Contaminated Surface Waters.
Modkovski TA, Haminiuk CWI, Nawate BAL, Chaves JRD, Azevedo JCR
Summary
7.7/10Natural biofilms made of microorganisms and algae can effectively clean polluted water by breaking down and absorbing contaminants, offering an inexpensive, nature-based solution for restoring contaminated rivers and water systems.
Key Findings
Periphytic biofilms can remove contaminants even at very low concentrations due to their extensive adhesion to solid surfaces in water systems
Biofilms employ multiple contaminant removal mechanisms including sorption, bioaccumulation, biodegradation, and biotransformation
These biofilms simultaneously support river ecosystem health through carbon and nutrient cycling while performing self-purification functions
Original Abstract
Periphytic biofilms, formed by fungi, bacteria, algae, and protozoa within an extracellular matrix, colonize various surfaces in river water and play a key role in carbon and nutrient cycling and river self-purification. Given their ecological importance, understanding the mechanisms these biofilms employ in contaminant bioremediation is essential for optimizing their application in environmental management. To achieve this, it is crucial to differentiate processes such as sorption, bioaccumulation, biodegradation, and biotransformation, which are key to evaluating bioremediation strategies using biofilms. This review highlights the effectiveness of biofilms in contaminant removal, even at low concentrations, due to their extensive adherence to solid surfaces in river systems. Furthermore, it explores the potential mechanisms of biofilm action in bioremediation. The review also addresses current challenges and prospects for enhancing the self-purification of aquatic ecosystems, alongside applying green bioremediation technologies utilizing periphytic biofilms. Such advancements aim to contribute to the sustainable management of water resources and restore aquatic ecosystem health.