Potential application of bacterial biofilm for bioremediation of toxic heavy metals and dye-contaminated environments

Trace Metal Contamination Impacts Predicted Functions More Than Structure of Marine Prokaryotic Biofilm Communities in an Anthropized Coastal Area

“…While we observed a significant impact of the site of immersion on prokaryotic biofilm structure, and despite the uncontaminated site 41p appeared as a separate cluster, surprisingly this was not related to TM contamination gradients or to other measured environmental variables in this study. Conversely to bacterioplankton communities (Coclet et al, 2018(Coclet et al, , 2019, biofilm communities could exhibit better adaptation and survival skills, as they are protected within a matrix of EPS and show ability to immobilize the pollutants (Mohapatra et al, 2020). Indeed, complex natural biofilms include a diversity of organisms with different metabolic capacities and physiologies which generates opportunities for cooperation (Dang and Lovell, 2016;Flemming et al, 2016;Kirstein et al, 2018) and promote tolerance (Königs et al, 2015) or resistance to metallic stress (Harrison et al, 2007).…”

“…The established inherent capacity of biofilms to survive in contaminated environments is also explained by their ability to play a role in bioremediation processes (Singh et al, 2006;Mohapatra et al, 2020). Biofilms are more suitable for the remediation of TM compounds because of their high microbial cell densities, structural stability, signaling process, metabolic diversification, immobilization ability, and the presence of surface active molecules (Singh et al, 2006).…”

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

“…Biofilms are sticky, viscous, slimy, negatively charged layers of specially structured microbial conglomerations of a single or multiple species that are attached to biotic or abiotic surfaces through embedding in a self-synthesized matrix of extracellular polymeric substances (EPSs) [ 226 ]. Bacterial biofilms have many advantages over the free planktonic bacterial species, such as protection from the adverse effects of a changing environment, the ability to exchange nutrient and genetic materials, survival in different metabolic states, and increased tolerance against various toxic compounds, e.g., chemicals, organic pollutants, heavy metals, and antibiotics [ 227 ]. The mechanism of dye adsorption by biofilms is complex and results from intraparticle diffusion as well as surface adsorption.…”

Biodegradasi Pewarna Tekstil Rhodamin B oleh Bakteri Pembentuk Biofilm

“…Biofilm yang dibentuk oleh ketiga isolat bakteri lokal asal perairan Tanjung Tiram sangat membantu dalam mendegradasi senyawa Rhodamin B yang merupakan senyawa toksik. Menurut Mohapatra et al (2019) pewarna bermuatan positif. Kehadiran senyawa yang bersifat toksik akan menginduksi gen resistensi pada biofilm sehingga mengaktifkan enzim yang akan mereduksi senyawa toksik (Mohapatra et al, 2019).…”

“…Menurut Mohapatra et al (2019) pewarna bermuatan positif. Kehadiran senyawa yang bersifat toksik akan menginduksi gen resistensi pada biofilm sehingga mengaktifkan enzim yang akan mereduksi senyawa toksik (Mohapatra et al, 2019).…”