globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2018.05.015
Scopus ID: 2-s2.0-85048484512
Title:
New insights into the formation of silver-based nanoparticles under natural and semi-natural conditions
Author: Wimmer A.; Kalinnik A.; Schuster M.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2018
Volume: 141
pages begin: 227
pages end: 234
Language: 英语
Keyword: Cloud point extraction ; Electrothermal atomic absorption spectroscopy ; Environmental analysis ; Nanoparticle formation ; Silver nanoparticles ; Single particle inductively coupled plasma mass spectrometry
Scopus Keyword: Absorption spectroscopy ; Biological materials ; Lakes ; Mass spectrometry ; Organic carbon ; Ostwald ripening ; Particle size ; Silver nanoparticles ; Sulfur compounds ; Cloud point extractions ; Electrothermal atomic absorption spectroscopy ; Environmental analysis ; Nanoparticle formation ; Single particle ; Silver compounds ; natural organic matter ; silver nanoparticle ; sulfide ; metal nanoparticle ; silver ; alpine environment ; bioaccumulation ; concentration (composition) ; eutrophic environment ; experimental study ; geogenic source ; lake water ; mass spectrometry ; nanoparticle ; organic carbon ; particle size ; silver ; Article ; darkness ; Germany ; incubation temperature ; lake ; particle size ; priority journal ; reaction time ; sunlight ; total organic carbon ; chemistry ; lake ; water pollutant ; Germany ; Germany ; Lakes ; Metal Nanoparticles ; Particle Size ; Silver ; Water Pollutants, Chemical
English Abstract: For the first time, the natural formation of silver-based nanoparticles (Ag-b-NPs) was studied in field investigations of two pre-alpine lakes in Germany that contain geogenic silver traces in the sub-ng L−1 range. Light-sensitive microorganisms most likely accumulate and transport these silver traces from deeper water layers to the surface. At the surface of the eutrophic lake, approximately 40% of total silver (5.7 ng L−1) consisted of Ag-b-NPs, whereas in the oligotrophic lake with similar enrichment of silver species, no Ag-b-NPs were detected. Additional lab experiments with nature-related Ag(I) concentrations in the lower-ng L−1 range and natural organic matter with total organic carbon values of ≤5 mg L−1 revealed that, contrary to common interpretation in the literature, Ag-b-NPs are also or even preferably formed in the dark. Particle size increases gradually with increasing reaction time, showing that Ostwald ripening occurs even at such low particle concentrations. When sulfide ions are present, smaller Ag-b-NPs with a narrower size distribution are formed. © 2018 Elsevier Ltd
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被引频次[WOS]:7   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/112687
Appears in Collections:气候减缓与适应

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Affiliation: Division of Analytical Chemistry, Department of Chemistry, Technical University of Munich, Garching, 85748, Germany

Recommended Citation:
Wimmer A.,Kalinnik A.,Schuster M.. New insights into the formation of silver-based nanoparticles under natural and semi-natural conditions[J]. Water Research,2018-01-01,141
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