Influence of biofilm on the transport of fullerene (C60) nanoparticles in porous media

Tong, Meiping; Ding, Jingjin; Shen, Yun; Zhu, Pingting

doi:10.1016/j.watres.2009.09.040

Cited by 78 publications

(57 citation statements)

References 26 publications

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“…7b to d). Previous studies have shown that the number of nanoparticles attached to surfaces increases with the presence of biofilm EPS, in a way that cannot be well predicted by the traditional Derjaguin-Landau-Verwey-Overbeek (DLVO) theory (50)(51)(52). The results of this study suggest that the interactions between bacteria and nanoparticles may be governed largely by the AB (hydrophobic) interaction, which coincides well with the XDLVO theory, in which a hydrophobic interaction energy is added to the DLVO theory.…”

Section: Fig 2 Comparison Of Photocatalytic Inactivation Efficienciesmentioning

confidence: 97%

Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants

Huang

Xia

et al. 2015

Appl Environ Microbiol

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The dual roles of capsular extracellular polymeric substances (EPS) in the photocatalytic inactivation of bacteria were demonstrated in a TiO2-UVA system, by comparing wild-typeEscherichia colistrain BW25113 and isogenic mutants with upregulated and downregulated production of capsular EPS. In a partition system in which direct contact between bacterial cells and TiO2particles was inhibited, an increase in the amount of EPS was associated with increased bacterial resistance to photocatalytic inactivation. In contrast, when bacterial cells were in direct contact with TiO2particles, an increase in the amount of capsular EPS decreased cell viability during photocatalytic treatment. Taken together, these results suggest that although capsular EPS can protect bacterial cells by consuming photogenerated reactive species, it also facilitates photocatalytic inactivation of bacteria by promoting the adhesion of TiO2particles to the cell surface. Fluorescence microscopy and scanning electron microscopy analyses further confirmed that high capsular EPS density led to more TiO2particles attaching to cells and forming bacterium-TiO2aggregates. Calculations of interaction energy, represented by extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) potential, suggested that the presence of capsular EPS enhances the attachment of TiO2particles to bacterial cells via acid-base interactions. Consideration of these mechanisms is critical for understanding bacterium-nanoparticle interactions and the photocatalytic inactivation of bacteria.

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Section: Fig 2 Comparison Of Photocatalytic Inactivation Efficienciesmentioning

confidence: 97%

Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants

Huang

Xia

et al. 2015

Appl Environ Microbiol

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“…1, and hence a higher nanoparticle deposition rate. Lower breakthrough curves were also observed by Tong et al (2010) with fullerene (C 60 ) nanoparticle transport in sand columns with an E. coli biofilm, by Tripathi et al (2012) with sulphonated polystyrene latex bead transport in sand columns, to which a P. aeruginosa biofilm was introduced, by Li et al (2013) with several nanoparticles in biofilm coated sand filters, as well as by Jiang et al (2013) in ZnO nanoparticle transport in sand columns with an E. coli biofilm. All nanoparticles were negatively charged.…”

Section: Influence Of Biofilms On Nanoparticle Transportmentioning

confidence: 97%

“…Zerovalent iron nanoparticles capped with polyacrylic acid were used in the transport experiments, and NaCl electrolyte ionic strength was 1 mM. A higher retention rate of nanoparticles was observed in higher ionic strength electrolyte of 25 mM, an effect also demonstrated by Tong et al (2010). This was explained by lower compression of the electrical double layer (EDL) of nanoparticles at low ionic strength, resulting in increased electrostatic repulsion between negatively charged polymer-coated nZVI and the negatively charged biofilm (Lerner et al, 2012).…”

Section: Influence Of Biofilms On Nanoparticle Transportmentioning

confidence: 99%

“…In previous studies, most transport experiments in biofilmcoated porous media were conducted with negatively-charged nanoparticles, in order to observe nanoparticle transport under unfavourable attachment conditions, i.e., repulsive interactions between negatively charged nanoparticles and negatively charged bacteria (Jiang et al, 2013;Lerner et al, 2012;Tong et al, 2010;Tripathi et al, 2012;Xiao and Wiesner, 2013). Studies of capped nanoparticles have also been conducted on batch tests of bacteria in order to explain the mechanisms of nanoparticle attachment and accumulation in bacterial cells.…”

Section: Influence Of Biofilms On Nanoparticle Transportmentioning

confidence: 99%

“…Consequently, our knowledge of the behaviour of nanoparticles under natural conditions found in the subsurface is limited. In a study on fullerene (C 60 ) nanoparticle transport in sand coated with an Escherichia coli (E. coli) biofilm, Tong et al (2010) found that biofilm promoted higher nanoparticle deposition. Tripathi et al (2012) demonstrated similar findings in transport experiments conducted with sulphate and carboxyl-modified latex nanoparticles and carboxyl-modified CdSe/ZnS quantum dots in sand columns with a Pseudomonas aeruginosa biofilm, as shown by larger attachment efficiencies and lower breakthrough curves.…”

Section: Introductionmentioning

confidence: 99%

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The influence of biofilms on the mobility of bare and capped zinc oxide nanoparticles in saturated sand and glass beads

Kurlanda-Witek¹,

Ngwenya

Butler

2015

Journal of Contaminant Hydrology

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Biofilms are a common constituent of the subsurface and are known to influence contaminant transport; however only a few studies to date have addressed microbial controls on nanoparticle mobility in porous media. The impact of a 3-day Pantoea agglomerans biofilm on the mobility of zinc oxide (ZnO) nanoparticles was studied in column experiments containing sand and glass beads at near-neutral pH and constant ionic strength. Bare ZnO nanoparticles (bZnO-NPs) and ZnO nanoparticles capped with tri-aminopropyltriethoxysilane (cZnO-NPs) were used in the experiments. Breakthrough curves demonstrate that the biofilm particularly slowed nanoparticle migration of bZnO-NPs in glass bead columns and cZnO-NPs in sand columns. With the exception of bZnO-NPs in sand columns, biofilm-coated porous media retained more nanoparticles than those of controls without biofilm. The biofilm may bear an impact on the surface charge of the porous medium, nullifying porous medium-specific effects. Although viable cell counts (VCCs) decreased after the introduction of electrolyte and before nanoparticle transport experiments, SEM and CLSM imaging of porous medium samples taken from columns after nanoparticle transport experiments, as well as total organic carbon (TOC) measurements reveal that biofilm was present in the columns throughout the experiments. Hence, it can be concluded that even a thin amount of biofilm can hinder nanoparticle migration in small-scale porous medium experiments. Moreover, nanoparticle mobility is dependent on the binding capacity of biofilms, rather than the type of porous media.

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Nanoparticle Aggregation and Deposition in Porous Media

Xiao¹,

Wiesner²,

Xing³

et al. 2016

Engineered Nanoparticles and the Environment: Biophysicochemical Processes and Toxicity

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Influence of biofilm on the transport of fullerene (C60) nanoparticles in porous media

Cited by 78 publications

References 26 publications

Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants

Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants

The influence of biofilms on the mobility of bare and capped zinc oxide nanoparticles in saturated sand and glass beads

Nanoparticle Aggregation and Deposition in Porous Media

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