scholarly journals Aging reduces the toxicity of pristine but not sulphidised silver nanoparticles to soil bacteria

2018 ◽  
Vol 5 (11) ◽  
pp. 2618-2630 ◽  
Author(s):  
Carolin L. Schultz ◽  
Joanna Gray ◽  
Rudo A. Verweij ◽  
Martí Busquets-Fité ◽  
Victor Puntes ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Soil Bacteria

Aging of silver nanoparticles shows soluble silver driving toxicity in ISO medium, but not in media containing natural organic matter.

scholarly journals Colloidal stability of capped silver nanoparticles in natural organic matter-containing electrolyte solutions

NanoImpact ◽  
2020 ◽  
Vol 19 ◽  
pp. 100242
Author(s):  
Leonardo Gutierrez ◽  
Andreas Schmid ◽  
Noor Zaouri ◽  
Daniel Garces ◽  
Jean-Philippe Croue
Keyword(s):  
Silver Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Electrolyte Solutions

Natural Organic Matter Alters Biofilm Tolerance to Silver Nanoparticles and Dissolved Silver

2012 ◽  
Vol 46 (22) ◽  
pp. 12687-12696 ◽  
Author(s):  
Stacy M. Wirth ◽  
Gregory V. Lowry ◽  
Robert D. Tilton
Keyword(s):  
Silver Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter

scholarly journals Facile synthesis of graphene wool doped with oleylamine-capped silver nanoparticles (GW-αAgNPs) for water treatment applications

2021 ◽  
Vol 11 (11) ◽  
Author(s):  
Adedapo O. Adeola ◽  
Gugu Kubheka ◽  
Evans M. N. Chirwa ◽  
Patricia B. C. Forbes
Keyword(s):  
Silver Nanoparticles ◽  
Organic Matter ◽  
Adsorption Capacity ◽  
Natural Organic Matter ◽  
Elevated Temperatures ◽  
Maximum Adsorption Capacity ◽  
Facile Synthesis ◽  
Gram Positive ◽  
Gram Negative ◽  
Process Economics

AbstractThe facile synthesis of graphene wool doped with oleylamine-capped silver nanoparticles (GW-αAgNP) was achieved in this study. The effect of concentration, pH, temperature and natural organic matter (NOM) on the adsorption of a human carcinogen (benzo(a)pyrene, BaP) was evaluated using the doped graphene wool adsorbent. Furthermore, the antibacterial potential of GW-αAgNP against selected drug-resistant Gram-negative and Gram-positive bacteria strains was evaluated. Isotherm data revealed that adsorption of BaP by GW-αAgNP was best described by a multilayer adsorption mechanism predicted by Freundlich model with least ERRSQ < 0.79. The doping of graphene wool with hydrophobic AgNPs coated with functional moieties significantly increased the maximum adsorption capacity of GW-αAgNP over GW based on the qmax and qm predicted by Langmuir and Sips models. π-π interactions contributed to sorbent-sorbate interaction, due to the presence of delocalized electrons. GW-αAgNP-BaP interaction is a spontaneous exothermic process (negative $$\Delta H^\circ$$ Δ H ∘ and $$\Delta G)$$ Δ G ) , with better removal efficiency in the absence of natural organic matter (NOM). While GW is more feasible with higher maximum adsorption capacity (qm) at elevated temperatures, GW-αAgNP adsorption capacity and efficiency is best at ambient temperature, in the absence of natural organic matter (NOM), and preferable in terms of energy demands and process economics. GW-αAgNP significantly inhibited the growth of Gram-negative Pseudomonas aeruginosa and Gram-positive Bacillus subtilis strains, at 1000 mg/L dosage in preliminary tests, which provides the rationale for future evaluation of this hybrid material as a smart solution to chemical and microbiological water pollution.

scholarly journals Effects of natural organic matter and sulfidation on the flocculation and filtration of silver nanoparticles

2016 ◽  
Vol 3 (6) ◽  
pp. 1436-1446 ◽  
Author(s):  
Tongren Zhu ◽  
Desmond F. Lawler ◽  
Yunqi Chen ◽  
Boris L. T. Lau
Keyword(s):  
Silver Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Granular Media ◽  
Traditional Theory ◽  
Initial Deposition ◽  
Self Aggregation

Environmental transformations had different effects on self-aggregation and initial deposition in granular media filtration, contrary to traditional theory.

Effects of molecular weight-fractionated natural organic matter on the phytoavailability of silver nanoparticles

2018 ◽  
Vol 5 (4) ◽  
pp. 969-979 ◽  
Author(s):  
Min Li ◽  
Fei Dang ◽  
Qing-Long Fu ◽  
Dong-Mei Zhou ◽  
Bin Yin
Keyword(s):  
Molecular Weight ◽  
Silver Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter

The key role of NOM heterogeneity in inhibiting the dissolution and consequently the uptake of total Ag.

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