How Microbial Biofilms Control the Environmental Fate of Engineered Nanoparticles?

Desmau, Morgane; Carboni, A.; Bars, Maureen Le; Dœlsch, Emmanuel; Benedetti, Marc F.; Levard, Clément; Gélabert, Alexandre

doi:10.3389/fenvs.2020.00082

Cited by 18 publications

(11 citation statements)

References 216 publications

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“…21 AgCl complexes can then act as Ag-NP precursor, but such formation remains low in seawater with high Cl − , 76 especially at low Ag concentrations. 77 Ag-NPs have been found to accumulate in biofilms, 55 in particular in simulated marine environments, 7 but our point measurements of Ag content in sediment suggest such accumulation was limited in the experimental set up deployed. Using environmentally relevant concentrations (25 ng l −1 ) or higher concentrations (25 μg l −1 ), our experiments showed no significant impact of silver (Ag) NPs on marine biofilms or associated ecosystem functions, regardless of the environmental context.…”

Section: Discussionmentioning

confidence: 70%

“…Mesocosm are particularly well suited to understand the impact of NPs on complex systems such as microbial biofilms. 55 Each mesocosm consisted of an experimental tank containing 4 sediment cores, and a reservoir tank. Seawater was pumped in and out of the experimental tanks twice per 24 h, and advancing 1 h per day to match the natural rhythm of tides on the Essex coast.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…Mesocosm approaches allow for controlled experimental manipulation of intact intertidal sediment communities while maintaining as close as possible natural environmental conditions. 54,55,109,110 The impact of grazing fish 111 and wave action on biofilm resuspension 112 were not simulated, but our approach simulated important environmental drivers of sedimentbiofilm ecology: tidal cover, natural daylight quality and periodicities, rainfall, temperature, and nutrient resupply. Microphytobenthic activity (Chl a : phaeophytin ratio, F v /F m ) indicated healthy biofilm functioning was sustained throughout the experimental periods, permitting conclusions about the environmental impacts of addition of NPs on biofilm related ecosystem functions to be drawn.…”

Section: Environmental Impact Of Titanium Oxide Nanoparticlesmentioning

confidence: 99%

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Environmental context determines the impact of titanium oxide and silver nanoparticles on the functioning of intertidal microalgal biofilms

Passarelli

Cui

Valsami-Jones

et al. 2020

Environ. Sci.: Nano

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Section: Discussionmentioning

confidence: 70%

Section: Experimental Set-upmentioning

confidence: 99%

Section: Environmental Impact Of Titanium Oxide Nanoparticlesmentioning

confidence: 99%

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Environmental context determines the impact of titanium oxide and silver nanoparticles on the functioning of intertidal microalgal biofilms

Passarelli

Cui

Valsami-Jones

et al. 2020

Environ. Sci.: Nano

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“…As described previously, maturation of biofilms in the filter can be extended to long periods of time since the water treatment system is provided with a continuous feed of carbon sources and nutrients (Liao et al, 2016). In the biofilters, the advantages of having more mature biofilms for treatment are higher biomass, metabolic activity, and resistance to some toxic contaminants (Cohen et al, 2001; Desmau et al, 2020; Joo & Aggarwal, 2018). During the colonization of biofilms on GAC media, it is possible to obtain high removal of dissolved organic carbon (DOC) since the treatment process is under adsorption before the transition to biofiltration when the adsorption capacity is reached (Basu et al, 2016).…”

Section: Biofilm Formation and Treatment Mechanismsmentioning

confidence: 99%

Biofiltration for treatment of recent emerging contaminants in water: Current and future perspectives

Thuptimdang

Siripattanakul‐Ratpukdi

Ratpukdi

et al. 2020

Water Environment Research

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This review article discusses the current state of knowledge on water treatment and reuse by biofiltration systems focusing on biologically enhanced activated carbon (BAC) process. First, the applications of BAC in water treatment systems are overviewed, and then, the mechanisms for both biofilm formation and contaminant treatment are discussed along with the operational parameters influencing the performance of BAC process. Since contaminant removal by BAC is governed by adsorption and biodegradation, both processes are reviewed in relation to the treatment mechanisms. Information on removal of recent emerging contaminants including nitrogenous and unregulated disinfection by-products (DBPs) and their precursors, poly-and perfluorofluoroalkyl substances, nanoparticles, and plasticizers and microplastics by BAC is given along with suggestions for treatment improvements and future research. The uniqueness of this review includes insights on relevant biofilm aspects and the coverage on the abilities of BAC for treatment of recent and less common emerging contaminants especially unregulated DBPs and their precursors, nanoparticles, and plasticizers and microplastics. For future BAC studies, recommendations are proposed on exploring the biofilm development on media and recent emerging contaminants as co-contaminants, as well as developing novel supporting materials such as biochar. © 2020 Water Environment Federation • Practitioner points• The amount and the physiology and physical structure of biofilm affect the treatment efficiency of biological activated carbon. • Biological activated carbon is capable of removing a majority of nitrogenous and unregulated disinfection by-products. • Whether and how biological activated carbon is impacted by and/or can remove nanoparticles, and plasticizers and microplastics remain largely unknown. • Future work on biological activated carbon should focus on biofilm evolution and control, and novel support materials.

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“…Nanoparticles (NPs) are currently being employed as probes and drug nanocarriers with better performance at penetrating the biofilm matrix [ 4 – 6 ]; the possibility of choosing the chemical composition, surface topography and size of NPs widens the chances of achieving effective antibiofilm strategies [ 7 ]. Nevertheless, the use of NPs containing metals such as zinc, copper, silver, gold and iron has some drawbacks regarding their environmental fate and biocompatibility [ 8 , 9 ]. Within this context, the synthesis of polymeric NPs gains a clear advantage, seeing that their organic nature allied with biodegradability would solve the aforementioned issues [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and self-assembly of curcumin-modified amphiphilic polymeric micelles with antibacterial activity

et al. 2021

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Background The ubiquitous nature of bacterial biofilms combined with the enhanced resistance towards antimicrobials has led to the development of an increasing number of strategies for biofilm eradication. Such strategies must take into account the existence of extracellular polymeric substances, which obstruct the diffusion of antibiofilm agents and assists in the maintenance of a well-defended microbial community. Within this context, nanoparticles have been studied for their drug delivery efficacy and easily customised surface. Nevertheless, there usually is a requirement for nanocarriers to be used in association with an antimicrobial agent; the intrinsically antimicrobial nanoparticles are most often made of metals or metal oxides, which is not ideal from ecological and biomedical perspectives. Based on this, the use of polymeric micelles as nanocarriers is appealing as they can be easily prepared using biodegradable organic materials. Results In the present work, micelles comprised of poly(lactic-co-glycolic acid) and dextran are prepared and then functionalised with curcumin. The effect of the functionalisation in the micelle’s physical properties was elucidated, and the antibacterial and antibiofilm activities were assessed for the prepared polymeric nanoparticles against Pseudomonas spp. cells and biofilms. It was found that the nanoparticles have good penetration into the biofilms, which resulted in enhanced antibacterial activity of the conjugated micelles when compared to free curcumin. Furthermore, the curcumin-functionalised micelles were efficient at disrupting mature biofilms and demonstrated antibacterial activity towards biofilm-embedded cells. Conclusion Curcumin-functionalised poly(lactic-co-glycolic acid)-dextran micelles are novel nanostructures with an intrinsic antibacterial activity tested against two Pseudomonas spp. strains that have the potential to be further exploited to deliver a secondary bioactive molecule within its core. Graphic Abstract

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How Microbial Biofilms Control the Environmental Fate of Engineered Nanoparticles?

Cited by 18 publications

References 216 publications

Environmental context determines the impact of titanium oxide and silver nanoparticles on the functioning of intertidal microalgal biofilms

Environmental context determines the impact of titanium oxide and silver nanoparticles on the functioning of intertidal microalgal biofilms

Biofiltration for treatment of recent emerging contaminants in water: Current and future perspectives

Synthesis and self-assembly of curcumin-modified amphiphilic polymeric micelles with antibacterial activity

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