Identification of platinum nanoparticles in road dust leachate by single particle inductively coupled plasma-mass spectrometry
Artikel i vetenskaplig tidskrift, 2018

Elevated platinum (Pt) concentrations are found in road dust as a result of emissions from catalytic converters in vehicles. This study investigates the occurrence of Pt in road dust collected in Ghent (Belgium) and Gothenburg (Sweden). Total Pt contents, determined by tandem ICP-mass spectrometry (ICP-MS/MS), were in the range of 5 to 79 ng g − 1 , comparable to the Pt content in road dust of other medium-sized cities. Further sample characterization was performed by single particle (sp) ICP-MS following an ultrasonic extraction procedure using stormwater runoff for leaching. The method was found to be suitable for the characterization of Pt nanoparticles in road dust leachates. The extraction was optimized using road dust reference material BCR-723, for which an extraction efficiency of 2.7% was obtained by applying 144 kJ of ultrasonic energy. Using this method, between 0.2% and 18% of the Pt present was extracted from road dust samples. spICP-MS analysis revealed that Pt in the leachate is entirely present as nanoparticles of sizes between 9 and 21 nm. Although representing only a minor fraction of the total content in road dust, the nanoparticulate Pt leachate is most susceptible to biological uptake and hence most relevant in terms of bioavailability.

Nanoparticles

ICP-MS/MS

Platinum

Single particle ICP-MS

Road dust

Catalytic converters

Författare

K. Folens

Universiteit Gent

T. Van Acker

Universiteit Gent

E. Bolea-Fernandez

Universiteit Gent

Geert Cornelis

Sveriges lantbruksuniversitet

F. Vanhaecke

Universiteit Gent

G. Du Laing

Universiteit Gent

Sebastien Rauch

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

Science of the Total Environment

0048-9697 (ISSN)

Vol. 615 849-856

Styrkeområden

Building Futures

Ämneskategorier

Analytisk kemi

Geovetenskap och miljövetenskap

Miljövetenskap

DOI

10.1016/j.scitotenv.2017.09.285

PubMed

252602