PMID- 27993044
OWN - NLM
STAT- MEDLINE
DCOM- 20170608
LR  - 20221207
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 50
IP  - 24
DP  - 2016 Dec 20
TI  - Dissolution Behavior of Silver Nanoparticles and Formation of Secondary Silver 
      Nanoparticles in Municipal Wastewater by Single-Particle ICP-MS.
PG  - 13318-13327
AB  - Ag nanoparticles (nAg) are used in various consumer products and a significant 
      fraction is eventually discharged with municipal wastewater (WW). In this study 
      we assessed the release of Ag from polyvinylpyrrolidone (PVP)- and citrate-coated 
      80 nm nAg in aerobic WW effluent and mixed liquor and the related changes in nAg 
      size, using single particle ICP-MS (spICP-MS). The concentration of dissolved 
      (nonparticulate) Ag in WW effluent was 0.89 +/- 0.05 ppb at 168 h and was 71% lower 
      than in deionized (DI) water, in batch reactors spiked with 5 x 10(6) PVP-nAg 
      particles/mL (10 mug/L), an environmentally relevant concentration. Dissolved Ag 
      in WW was partly reformed into  approximately 22 nm nAg(x)S(y) by inorganic sulfides and 
      organosulfur dissolved organic carbon (DOC) after 120 h, whereas the parent nAg 
      mean diameter decreased to 65.89 +/- 0.9 nm. Reformation of nAg(x)S(y) from Ag(+) 
      also occurred in cysteine solutions but not in DI water, or humic and fulvic acid 
      solutions. Dissolution experiments with nAg in WW mixed liquor showed 
      qualitatively similar dissolution trends. Time-of-flight secondary ion mass 
      spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS) analyses 
      indicated binding of thiol- and amine-containing DOC as well as inorganic 
      sulfides with nAg. Those WW components, as well as limited dissolved oxygen, 
      decreased dissolution in WW.
FAU - Azodi, Mehrnoosh
AU  - Azodi M
AD  - Department of Civil Engineering, McGill University , Montreal, Quebec, Canada.
FAU - Sultan, Yasir
AU  - Sultan Y
AD  - Environment and Climate Change Canada , Gatineau, Quebec, Canada.
FAU - Ghoshal, Subhasis
AU  - Ghoshal S
AD  - Department of Civil Engineering, McGill University , Montreal, Quebec, Canada.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20161206
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Waste Water)
RN  - 0 (Water Pollutants, Chemical)
RN  - 3M4G523W1G (Silver)
SB  - IM
MH  - Metal Nanoparticles/chemistry
MH  - Silver/*chemistry
MH  - Solubility
MH  - Wastewater/*chemistry
MH  - Water Pollutants, Chemical/chemistry
EDAT- 2016/12/21 06:00
MHDA- 2017/06/09 06:00
CRDT- 2016/12/21 06:00
PHST- 2016/12/21 06:00 [entrez]
PHST- 2016/12/21 06:00 [pubmed]
PHST- 2017/06/09 06:00 [medline]
AID - 10.1021/acs.est.6b03957 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2016 Dec 20;50(24):13318-13327. doi: 
      10.1021/acs.est.6b03957. Epub 2016 Dec 6.