Do natural biofilm impact nZVI mobility and interactions with porous media? A column study

Crampon, Marc; Hellal, Jennifer; Mouvet, Christophe; Michel, Caroline; Wiener, Anke; Braun, J.; Ollivier, Patrick

doi:10.1016/j.scitotenv.2017.08.106

Cited by 20 publications

(14 citation statements)

References 77 publications

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“…Based on electrostatic considerations, interactions with positively charged ENPs are thus expected to be favored, while ENPs of negative charge should only poorly interact with the biofilm. This general trend is globally observed in many ENPs-biofilms systems (Peulen and Wilkinson, 2011;Lerner et al, 2012;Ikuma et al, 2014Ikuma et al, , 2015Dzumedzey et al, 2017;Crampon et al, 2018;Wang et al, 2019). Interestingly, electrostatic repulsion energy is also size dependent and is reported to be roughly proportional to the particle's surface area.…”

Section: Effect Of Surface Properties Of Enps On Enps-biofilm Interacmentioning

confidence: 60%

“…Similarly, a large variety of ENPs are trapped in significant amounts by biofilms (Battin et al, 2009;Burns et al, 2013;Avellan et al, 2018). It was also observed in column transport experiments where retention of ENPs increases in presence of these microbial structures: latex NPs and CdSe/ZnS quantum dots (QDs) (Tripathi et al, 2012), zerovalent Fe-NPs (Lerner et al, 2012;Crampon et al, 2018), nano-ZnO (Jiang et al, 2013), biogenic nano-Se (Wang et al, 2019), nano-Ag (Xiao and Wiesner, 2013). This increased retention in column experiments is generally explained by changes in roughness, surface charge and hydrophobicity at the surface of aquifer grains (Donlan, 2002;Kurlanda-Witek et al, 2015) in addition to the intrinsic accumulation properties of these microbial structures.…”

Section: Biofilms: Important Environmental Accumulatorsmentioning

confidence: 77%

See 1 more Smart Citation

How Microbial Biofilms Control the Environmental Fate of Engineered Nanoparticles?

Desmau

Carboni

Bars

et al. 2020

Front. Environ. Sci.

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Section: Effect Of Surface Properties Of Enps On Enps-biofilm Interacmentioning

confidence: 60%

Section: Biofilms: Important Environmental Accumulatorsmentioning

confidence: 77%

How Microbial Biofilms Control the Environmental Fate of Engineered Nanoparticles?

Desmau

Carboni

Bars

et al. 2020

Front. Environ. Sci.

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“…The synthetic water used in these experiments is FIm water corresponding to moderately hard water as described in US EPA Report EPA-821-R-02-012, Section 7.2.3.1 (US EPA, 2002). This water was prepared as previously described in Crampon et al (2018), and was composed of 96 mg L -1 NaHCO 3 , 60 mg L -1 CaSO 4 .2H 2 O, 60 mg L -1 MgSO 4 , and 4 mg L -1 KCl. The pH ranged from 7.4 to 7.8, the hardness ranged from 80 to 100 mg CaCO 3 .L -1 and the alkalinity from 57 to 64 mg CaCO 3 .L -1 as described by US EPA.…”

Section: Methodsmentioning

confidence: 99%

“…The bacterial community structure in cultures during the experiment was determined by 16S rRNA gene CE-SSCP fingerprints. About 200 bp of the V3 region of bacterial 16S rRNA genes were amplified from DNA and cDNA with the forward primer w49 (5′-ACGGTCCAGACTCCTACGGG-3′; Escherichia coli position, 331) and the reverse primer w34 (5′-TTACCGCGGCTGCTGGCAC-3′; E. coli position, 533), as previously described in Crampon et al (2018). The 5′ end was then labeled with the fluorescent dye FAM.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, the release of ferrous iron from nZVI followed by the Fenton reaction can also affect organisms (Xie and Cwiertny, 2012). Furthermore, although the mechanism of nZVI toxicity at the cellular level has not been fully determined, recent studies support the combined effect of biophysical nanoparticle/cell interactions and oxidative stress (Li et al, 2010; Wille et al, 2017; Crampon et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Shift in Natural Groundwater Bacterial Community Structure Due to Zero-Valent Iron Nanoparticles (nZVI)

et al. 2019

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Toxic and persistent contaminants in groundwater are technologically difficult to remediate. Remediation techniques using nanoparticles (NPs) such as nZVI (Zero-Valent Iron) are applicable as in situ reduction or oxidation agents and give promising results for groundwater treatment. However, these NP may also represent an additional contamination in groundwater. The aims of this study are to assess the impact of nZVI on the nitrate-reducing potential, the abundance and the structure of a planktonic nitrate-reducing bacterial community sampled in groundwater from a multicontaminated site. An active nitrate-reducing bacterial community was obtained from groundwater samples, and inoculated into batch reactors containing a carbon substrate, nitrate and a range of nZVI concentrations (from 0 to 70.1 mg Fe.L -1 ). Physical (pH, redox potential), chemical ( concentrations) and biological (DNA, RNA) parameters were monitored during 1 week, as well as nZVI size distribution and mortality of bacteria. Nitrate-reducing activity was temporally stopped in the presence of nZVI at concentrations higher than 30 mg L -1 , and bacterial molecular parameters all decreased before resuming to initial values 48 h after nZVI addition. Bacterial community composition was also modified in all cultures exposed to nZVI as shown by CE-SSCP fingerprints. Surprisingly, it appeared overall that bacteria viability was lower for lower nZVI concentrations. This is possibly due to the presence of larger, less reactive NP aggregates for higher nZVI concentrations, which inhibit bacterial activity but could limit cell mortality. After 1 week, the bacterial cultures were transplanted into fresh media without nZVI, to assess their resilience in terms of activity. A lag-phase, corresponding to an adaptation phase of the community, was observed during this step before nitrate reduction reiterated, demonstrating the community’s resilience. The induction by nZVI of modifications in the bacterial community composition and thus in its metabolic potentials, if also occurring on site, could affect groundwater functioning on the long term following nZVI application. Further work dedicated to the study of nZVI impact on bacterial community directly on site is needed to assess a potential impact on groundwater functioning following nZVI application.

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Impact of phosphate adsorption on the mobility of PANI‐supported nano zero‐valent iron

Lin

Bradford

et al. 2021

Vadose Zone Journal

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Nano zero-valent iron (nZVI) has been used for in situ groundwater remediation due to its strong adsorption and reaction characteristics. However, oxyanion contaminants in groundwater can ready adsorbed onto the surface of nZVI. This can potentially alter the mobility of nZVI and create a secondary pollution source, but these issues have not yet been systematically investigated. In this study, polyaniline-supported nZVI (PnZVI) and phosphate-sorbed PnZVI (PS-PnZVI) were synthesized in the laboratory. The sedimentation and transport behavior of these two nZVI particles were investigated, compared, and mathematically modeled to better understand the impact of phosphate adsorption on these processes. Results showed that phosphate adsorption can enhance the stability and mobility of PnZVI. Interaction energy calculations that considered van der Waals and magnetic attraction, electrostatic double layer and Born repulsion, and the influence of nanoscale roughness and binary charge heterogeneity were conducted to better infer mechanisms causing nZVI particle sedimentation and retention. Nanoscale roughness and binary charge heterogeneity were found to significantly decrease the energy barrier, but not to low enough levels to explain the observed behavior. The rapid settling of PnZVI was attributed to strong magnetic attraction between particles, which produced rapid aggregation and retention due to straining and/or hydrodynamic bridging. Phosphate adsorption enhanced the mobility of PS-PnZVI in comparison with PnZVI due to a decrease in particle size and aggregation, and an increase in the energy barrier with the porous media. A potential risk of nZVI particles to facilitate oxyanion contaminant transport was demonstrated for phosphate.

show abstract

Do natural biofilm impact nZVI mobility and interactions with porous media? A column study

Cited by 20 publications

References 77 publications

How Microbial Biofilms Control the Environmental Fate of Engineered Nanoparticles?

How Microbial Biofilms Control the Environmental Fate of Engineered Nanoparticles?

Shift in Natural Groundwater Bacterial Community Structure Due to Zero-Valent Iron Nanoparticles (nZVI)

Impact of phosphate adsorption on the mobility of PANI‐supported nano zero‐valent iron

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