Biofilm (Eco-Corona) Formation from Microplastics in Freshwater

Eco-corona formation, commonly referred to as biofilm formation from microplastics, has become a major worry in freshwater environments. Freshwater habitats are rife with microplastics, which pose major threats to the environment and public health. Microplastics, which are tiny plastic particles less than 5 mm, offer a good substrate for the development of biofilms because of their substantial surface area and hydrophobic nature. Microplastics undergo physical, chemical, and biological changes when they enter freshwater systems, which causes a biofilm layer to grow. Extracellular polymeric substances (EPS), other organic materials, and microbial communities are all assembled into a complex matrix during the biofilm development process by the adsorption of organic and inorganic components onto the microplastic surface. Depending on the environmental factors, the biofilm growth on microplastics can happen quickly, in only a few hours to a few days. Their destiny and transportation in freshwater ecosystems are impacted by biofilm formation on microplastics. Microplastics’ physical and chemical characteristics, including their buoyancy, aggregation patterns, and capacity for sorption of other contaminants, are altered by the eco-corona. Additionally, biofilms have the ability to influence the entire ecosystem by facilitating the ingestion and transport of microplastics within aquatic food webs. The production of biofilms from microplastics has severe ecological repercussions. Biofilms encourage the development and survival of microorganisms, which could result in the spread of dangerous germs and the modification of microbial communities. Antibiotic resistance in aquatic environments may be made worse by the increased colonization of microplastics by biofilms, which may also make it easier for antibiotic resistance genes to spread. The risk of waterborne diseases may also be increased by the formation of biofilms on microplastics, which may encourage the growth and persistence of pathogenic bacteria. Interdisciplinary research efforts and comprehensive management techniques are necessary to create successful strategies to limit the effects of microplastics on freshwater ecosystems, and this requires an understanding of the dynamics and ecological effects of the eco-corona.