Modeling nanomaterial fate in wastewater treatment: Monte Carlo simulation of silver nanoparticles (nano-Ag)

Hendren, Christine Ogilvie; Badireddy, Appala Raju; Casman, Elizabeth A.; Wiesner, Mark R.

doi:10.1016/j.scitotenv.2013.01.078

Cited by 107 publications

(71 citation statements)

References 23 publications

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“…Among these ENMs, silver nanoparticles (Ag NPs) are one of the most commonly used nanoparticles, finding increasing applications in a wide range of market sectors ranging from textiles to medical devices [4][5][6]. Silver as an anti-bacterial agent has a long historical record of use, but the production of engineered Ag NPs has enabled the use of these materials in diverse applications [7]; the most notable areas of application are cosmetic products, textiles, food packaging, and health supplements [8,9]. As of March 2015, silver nanoparticles were reported to be the most frequently used nanomaterials, as they have been found in at least 435 of a total of 1814 listed nano-enabled products, according to the Nanotechnology Consumer Products Inventory (CPI) [10].…”

Section: List Of Figuresmentioning

confidence: 99%

“…Typically, ENMs released from household and industrial commodities find their way through waste disposal streams and into wastewater treatment plants (WWTPs) [8,19].…”

Section: Wastewater Effluents As An Exposure Pathway For Silver Nanopmentioning

confidence: 99%

“…Although a major fraction of the ENMs entering WWTPs are removed during the primary and secondary treatment processes via the wastewater sludge, a small portion (5-15%) still may end up in surface waters, such as lakes and rivers, through the discharge of liquid effluent [20]. The possibility of increased nanomaterial exposure due to the discharge of wastewater sludge also cannot be disregarded, since the resulting biosolids containing ENMs can end up in landfills and incineration plants and may thus pose an ecological threat [8,21]. Indeed, a recent study has shown that the incineration process can convert the Ag…”

Section: Wastewater Effluents As An Exposure Pathway For Silver Nanopmentioning

confidence: 99%

“…ENMs are released into the environment [8]. Particle size is perhaps the most important feature of the nanoparticles, because at the nano-scale, the particles have an enhanced surface area, reactivity and transport capabilities as well as other associated 'nano-scale' features [29,30].…”

Section: Physicochemical Properties and Behavior Of Silver Nanoparticlesmentioning

confidence: 99%

“…Upon their release into the wastewater systems, Ag NPs will be subject to different environmental forces and may be transformed into various chemical species, such as dissolved Ag species, Ag2O, Ag2S and AgCl [8,19,20]. One of the most important processes that govern Ag NP transformations is sulfidation.…”

Section: Transformation Of Silver Nanoparticles In Wastewatersmentioning

confidence: 99%

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Transformations of silver nanoparticles in wastewater effluents: links to Ag bioavailability

Azimzada

Tufenkji

Wilkinson

2017

Environ. Sci.: Nano

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As a result of the burgeoning nanotechnology industry, the number of uses of engineered silver nanoparticles (Ag NPs) in consumer products has risen significantly in recent years.Despite their utility as anti-bacterial agents, the 'nano-scale' properties of these materials may lead to eco-toxicological problems when they end up in the environment. Wastewater effluents represent one of the main routes through which Ag NPs can reach an aquatic environment, where they may potentially interact with aquatic life. However, in wastewaters, Ag NPs may undergo different chemical and physical transformations, which may alter the potential toxicity of these NPs towards aquatic organisms. The main objectives of this study are to characterize the Ag NPs in wastewater effluents and then to assess their interactions with a model organism, the green alga Chlamydomonas reinhardtii.Experiments were conducted to distinguish the effect(s) of the wastewater matrix on the dissolution of Ag NPs and to determine whether the transformed NPs or the dissolved Ag species would be most bioavailable to C. reinhardtii. It was shown that in environmental matrices such as wastewater, the bioavailability of Ag + could be significantly or completely reduced-a Nous avons étudié l'effet de la matrice des eaux usées sur la dissolution des Ag NPs et la biodisponibilité des différentes formes (particulaire et dissoute) des Ag NPs pour C. reinhardtii.Dans les matrices environnementales telles que les eaux usées la biodisponibilité de Ag + serait réduite de façon significative, si ce n'est complète; une conclusion qui va à l'encontre les résultats des études similaires faites dans des matrices biologiques simples. Cette réduction

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Section: List Of Figuresmentioning

confidence: 99%

“…Typically, ENMs released from household and industrial commodities find their way through waste disposal streams and into wastewater treatment plants (WWTPs) [8,19].…”

Section: Wastewater Effluents As An Exposure Pathway For Silver Nanopmentioning

confidence: 99%