Natural water chemistry (dissolved organic carbon, pH, and hardness) modulates colloidal stability, dissolution, and antimicrobial activity of citrate functionalized silver nanoparticles

Pokhrel, Lok R.; Dubey, Brajesh; Scheuerman, Phillip R.

doi:10.1039/c3en00017f

Cited by 49 publications

(55 citation statements)

References 54 publications

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“…[39][40][41] Current knowledge suggests that ENPs entering aquatic systems will exhibit transport and fate behavior that will be highly dependent both on their released form and on the physicochemical characteristics of the receiving water. [42][43][44][45][46] There is thus a great need to evaluate the effects of water chemistry, changing conditions, and stability of the complexes they form with surfactants under environmental conditions.…”

Section: Environmental Significancementioning

confidence: 99%

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO₂ nanoparticles

Loosli

Stoll

2017

Environ. Sci.: Nano

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Section: Environmental Significancementioning

confidence: 99%

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO₂ nanoparticles

Loosli

Stoll

2017

Environ. Sci.: Nano

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“…Several studies have considered the impact on AgNP behavior and the interaction with NOM of fundamental environmental parameters including pH and hardness 17 , or ionic strength and electrolyte composition 15,18 . Redox conditions are also likely to play an important role.…”

Section: Introductionmentioning

confidence: 99%

Role of Humic Acid in the Stability of Ag Nanoparticles in Suboxic Conditions

Milne

Lapworth

Gooddy

et al. 2017

Environ. Sci. Technol.

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Stability and temporal changes in size distributions have been observed for citrate- (cit) and polyvinylpyrrolidone- (PVP) capped silver nanoparticles (AgNPs), in the presence or absence of sulfide and natural organic matter (NOM, as humic acid), while under suboxic conditions. There were substantial differences in the influence of the two capping agents, with PVP-AgNPs showing few or no significant changes in apparent stability or particle size distribution under the conditions examined, while the apparent size distributions of citrate-capped AgNPs changed rapidly. Sulfide and humic acid each individually caused immediate increases in cit-AgNP size distributions, which were then relatively stable over 60-145 days. This may be due to sulfide bridging and cation bridging, respectively. However, in competition, it was the influence of the humic acid that dominated that of the sulfide. These observations have implications for environmental fate and toxicity of AgNP. The increased stability in the presence of even low concentrations of NOM may limit the rapidity of Ag dispersal but may also concentrate the dose received by organisms, which subsequently ingest the stabilized particles.

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“…This research simply addresses pH level as a water chemistry parameter. We acknowledge that nanoparticle durability on membranes can be affected by other water chemistry variables, such as buffering capacity, hardness, salinity, and natural organic matter . Further research is needed to investigate the effect of other water variables on unintended NP release from nanomembranes.…”

Section: Resultsmentioning

confidence: 99%

A comparative study on electrosprayed, layer‐by‐layer, and chemically grafted nanomembranes loaded with iron oxide nanoparticles

Trejo

Frey

2015

J of Applied Polymer Sci

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In this study, carboxylic acid coated iron oxide nanoparticles (CA‐Fe3O4 NPs) were applied to Nylon 6 nanomembranes by three different techniques: (1) simultaneous electrospinning/electrospraying, (2) layer‐by‐layer (LbL) assembly, and (3) chemical grafting. These membranes have potential use toward clean‐up of polluted rivers due to the multi‐functional properties of the NPs. However, it is critical to evaluate particle retention and stability on fibers to reduce human health and environmental concerns. This study evaluates the NP treatment uniformity, and particle retention of the membranes based on knowledge of the preparation process. Electron microscopy and CIELAB spectrophotometry revealed that the NPs were uniformly dispersed via the electrospun/electrosprayed and grafted methods while non‐uniformity was observed on LbL treated membranes. The membranes were washed in solutions of various pH levels (pH = 4, 7, 10) to investigate NP release and retention. Inductively coupled plasma‐atomic emission spectroscopy results indicate particle release is driven by pH‐dependent, bonding interactions between the NPs and the Nylon 6 fibers. Over 97% of NPs were retained on all treated membranes after washing for 60 min. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42657.

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Natural water chemistry (dissolved organic carbon, pH, and hardness) modulates colloidal stability, dissolution, and antimicrobial activity of citrate functionalized silver nanoparticles

Cited by 49 publications

References 54 publications

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO₂ nanoparticles

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO₂ nanoparticles

Role of Humic Acid in the Stability of Ag Nanoparticles in Suboxic Conditions

A comparative study on electrosprayed, layer‐by‐layer, and chemically grafted nanomembranes loaded with iron oxide nanoparticles

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Natural water chemistry (dissolved organic carbon, pH, and hardness) modulates colloidal stability, dissolution, and antimicrobial activity of citrate functionalized silver nanoparticles

Cited by 49 publications

References 54 publications

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO2 nanoparticles

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO2 nanoparticles

Role of Humic Acid in the Stability of Ag Nanoparticles in Suboxic Conditions

A comparative study on electrosprayed, layer‐by‐layer, and chemically grafted nanomembranes loaded with iron oxide nanoparticles

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Product

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About

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO₂ nanoparticles

Effect of surfactants, pH and water hardness on the surface properties and agglomeration behavior of engineered TiO₂ nanoparticles