DOI: 10.1016/j.watres.2018.05.015
Scopus记录号: 2-s2.0-85048484512
论文题名: New insights into the formation of silver-based nanoparticles under natural and semi-natural conditions
作者: Wimmer A. ; Kalinnik A. ; Schuster M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 227
结束页码: 234
语种: 英语
英文关键词: Cloud point extraction
; Electrothermal atomic absorption spectroscopy
; Environmental analysis
; Nanoparticle formation
; Silver nanoparticles
; Single particle inductively coupled plasma mass spectrometry
Scopus关键词: 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
英文摘要: 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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112687
Appears in Collections: 气候减缓与适应
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作者单位: 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