Silver Release from Silver Nanoparticles in Natural Waters

Dobiáš, J; Bernier‐Latmani, Rizlan

doi:10.1021/es304023p

Cited by 278 publications

(212 citation statements)

References 35 publications

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“…Along with oxidation, another source of Ag + ions in nanoparticulate systems is the release of chemisorbed ions at the surface of the particles [54]. If a relatively mild reducing agent (such as sodium citrate) is used for the reduction, a proportion of the original silver salt will remain in its oxidized state.…”

Section: Role Of Ag + Speciesmentioning

confidence: 99%

Antibacterial activity of silver nanoparticles: A surface science insight

2015

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Summary Silver nanoparticles constitute a very promising approach for the development of new antimicrobial systems. Nanoparticulate objects can bring significant improvements in the antibacterial activity of this element, through specific effect such as an adsorption at bacterial surfaces. However, the mechanism of action is essentially driven by the oxidative dissolution of the nanoparticles, as indicated by recent direct observations. The role of Ag + release in the action mechanism was also indirectly observed in numerous studies, and explains the sensitivity of the antimicrobial activity to the presence of some chemical species, notably halides and sulfides which form insoluble salts with Ag + . As such, surface properties of Ag nanoparticles have a crucial impact on their potency, as they influence both physical (aggregation, affinity for bacterial membrane, etc.) and chemical (dissolution, passivation, etc.) phenomena. Here, we review the main parameters that will affect the surface state of Ag NPs and their influence on antimicrobial efficacy. We also provide an analysis of several works on Ag NPs activity, observed through the scope of an oxidative Ag + release.

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Section: Role Of Ag + Speciesmentioning

confidence: 99%

Antibacterial activity of silver nanoparticles: A surface science insight

2015

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“…Corresponding amount of Ag content was then measured for active surface of the packaging film (50 mm × 20 cm = 100 cm 2 ). Determination of 47 Ag content was carried out by ICP-MS (Inductively Coupled Plasma-Mass Spectroscopy), assembled with NexION ® 350D with dual-channel universal cell and…”

Section: Instrumentation For Migration Testsmentioning

confidence: 99%

“…Nano-sized AgNPs are clearly visible in white color in both the inset images. The elemental analysis of CC-PET 90:10 film after immobilization of AgNPs (Ag-CC-PET 90:10 ) was conducted to know the presence of 47 Ag content (Fig. 9).…”

Section: Analysis Of Immobilization Of Agnps Onto Cc-petmentioning

confidence: 99%

Extrusion and Evaluation of Chitosan Assisted AgNPs Immobilized Film Derived from Waste Polyethylene Terephthalate for Food Packaging Applications

Singh

Kumari

Kundu

2017

J Package Technol Res

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Antimicrobial Polyethylene terephthalate (PET) film was fabricated from PET waste by the process of 2° recycling, and then characterized and demonstrated at various environment conditions to evaluate its potential for for food packaging application. Blown PET film with thickness of 0.03 mm was extruded by simultaneous in situ extrusion of vPET and rPET in the ratio of 90:10. The obtained PET 90:10 film was then impregnated in 3% chitosan solution under controlled pH in order to furnish a thin layer by pre-wetting phenomenon that works as a substrate for AgNPs immobilization. The immobilization of AgNPs over PET 90:10 film was asserted by FESEM and EDX. Bactericidal property of film against Escherichia coli and Staphylococcus aureus are evaluated by disk diffusion assay method. Fabricated Ag-CC-PET 90:10 blown film is proposed for the purpose of food packaging. The controlled migration of Ag from packaging film to food stuff is beneficial as it prevents microbial growth in packaged food stuff. The migration kinetics of Ag from Ag-CC-PET 90:10 packaging film into packaged food stuff (food simulants), in terms of Ag content and the factors influencing the migration are also studied. Two food simulants; 40% EtOH and 4% HAc are used for migration study. Migration kinetics of Ag was studied for three S T ; 10, 30, and 50 °C as well as for four S t ; 1, 24, 72 and 168 h. Results indicate that the maximum migrations of Ag in the alkaline and acidic food simulants are found to be 0.01812 and 0.07272 ppm respectively, at maximum S T and S t . Migration of Ag content was found to be higher in acidic food simulant as compare to alkaline food simulant due to oxidative dissolution. The maximum Ag migrated content (50 °C, 168 h) was found under the permissible range prescribed by USFDA. The application of Ag-CC-PET 90:10 blown film as food packaging material is itself an innovative and ecofriendly approach as post-consumption discarded PET waste can brought be up in utilization by means of 2° recycling.

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“…They are used to protect drinking water from pathogens or prevent microbial derived bad odors [9]. AgNPs were shown to be the most toxic NPs especially to crustaceans and algae [10].…”

Section: Introductionmentioning

confidence: 99%

“…After the development in AgNPs production, the nanoparticles were used instead of the metal ion owing to their powerful toxicity effect [10,13,14]. The increase in the use of AgNPs in different sectors raised a concern due to their occasional release the environment [9]. Studying the toxicity of AgNPs, is an important area of research owing to its potential application in the fight against multi-drug resistant microorganisms.…”

Section: Introductionmentioning

confidence: 99%