Effects of silver nanoparticles on bacterial activity in natural waters

2011 ◽  
Vol 31 (1) ◽  
pp. 122-130 ◽  
Author(s):  
Pranab Das ◽  
Marguerite A. Xenopoulos ◽  
Clayton J. Williams ◽  
Md Ehsanul Hoque ◽  
Chris D. Metcalfe
Keyword(s):  
Silver Nanoparticles ◽  
Natural Waters ◽  
Bacterial Activity

scholarly journals Green synthesis of silk sericin-capped silver nanoparticles and their potent anti-bacterial activity

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Pornanong Aramwit ◽  
Nipaporn Bang ◽  
Juthamas Ratanavaraporn ◽  
Sanong Ekgasit
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Bacterial Activity ◽  
Silk Sericin

scholarly journals Heteroagglomeration of nanosilver with colloidal SiO2 and clay

2017 ◽  
Vol 14 (1) ◽  
pp. 1 ◽  
Author(s):  
Sébastien Maillette ◽  
Caroline Peyrot ◽  
Tapas Purkait ◽  
Muhammad Iqbal ◽  
Jonathan G. C. Veinot ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Polyacrylic Acid ◽  
Natural Waters ◽  
Colloidal Particles ◽  
Colloidal Stability ◽  
Analytical Techniques ◽  
Dark Field ◽  
Correlation Spectroscopy ◽  
Colloidal Clay ◽  
High Concentrations

Environmental contextThe fate of nanomaterials in the environment is related to their colloidal stability. Although numerous studies have examined their homoagglomeration, their low concentration and the presence of high concentrations of natural particles implies that heteroagglomeration rather than homoagglomeration is likely to occur under natural conditions. In this paper, two state-of-the art analytical techniques were used to identify the conditions under which nanosilver was most likely to form heteroagglomerates in natural waters. AbstractThe environmental risk of nanomaterials will depend on their persistence, mobility, toxicity and bioaccumulation. Each of these parameters is related to their fate (especially dissolution, agglomeration). The goal of this paper was to understand the heteroagglomeration of silver nanoparticles in natural waters. Two small silver nanoparticles (nAg, ~3nm; polyacrylic acid- and citrate-stabilised) were covalently labelled with a fluorescent dye and then mixed with colloidal silicon oxides (SiO2, ~18.5nm) or clays (~550nm SWy-2 montmorillonite). Homo- and heteroagglomeration of the nAg were first studied in controlled synthetic waters that were representative of natural fresh waters (50μg Ag L–1; pH 7.0; ionic strength 10–7 to 10–1 M Ca) by following the sizes of the nAg by fluorescence correlation spectroscopy. The polyacrylic acid-coated nanosilver was extremely stable under all conditions, including in the presence of other colloids and at high ionic strengths. However, the citrate-coated nanosilver formed heteroaggregates in presence of both colloidal SiO2 and clay particles. Nanoparticle surface properties appeared to play a key role in controlling the physicochemical stability of the nAg. For example, the polyacrylic acid stabilized nAg-remained extremely stable in the water column, even under conditions for which surrounding colloidal particles were agglomerating. Finally, enhanced dark-field microscopy was then used to further characterise the heteroagglomeration of a citrate-coated nAg with suspensions of colloidal clay, colloidal SiO2 or natural (river) water.

scholarly journals Enhanced Anti-Bacterial Activity Of Biogenic Silver Nanoparticles Synthesized From Terminalia mantaly Extracts

2019 ◽  
Vol Volume 14 ◽  
pp. 9031-9046 ◽  
Author(s):  
Michele Stella Majoumouo ◽  
Nicole Remaliah Samantha Sibuyi ◽  
Marius Belmondo Tincho ◽  
Michele Mbekou ◽  
Fabrice Fekam Boyom ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Bacterial Activity ◽  
Biogenic Silver Nanoparticles

Monitoring the Fate and Transformation of Silver Nanoparticles in Natural Waters

2016 ◽  
Vol 97 (4) ◽  
pp. 449-455 ◽  
Author(s):  
Lindsay M. Furtado ◽  
Mirco Bundschuh ◽  
Chris D. Metcalfe
Keyword(s):  
Silver Nanoparticles ◽  
Natural Waters

scholarly journals Green synthesis of silver nanoparticles using Ocimum canum and their anti-bacterial activity

2020 ◽  
Vol 24 ◽  
pp. 100848
Author(s):  
Giriraj Tailor ◽  
B.L. Yadav ◽  
Jyoti Chaudhary ◽  
Manoj Joshi ◽  
Chetana Suvalka
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Bacterial Activity

scholarly journals Erratum to: green synthesis of silk sericin-capped silver nanoparticles and their potent anti-bacterial activity

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Pornanong Aramwit ◽  
Nipaporn Bang ◽  
Juthamas Ratanavaraporn ◽  
Thanasorn Thanavibul ◽  
Sanong Ekgasit
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Bacterial Activity ◽  
Silk Sericin
Sign in / Sign up

Export Citation Format

Share Document