Publication Type Journal Article
Title Speciation analysis of Pt and Rh in urban road dust leachates
Authors Carlos E. Monteiro Antonio Cobelo-García Miguel Caetano Margarida Correia dos Santos
Groups Chem4Env
Journal SCIENCE OF THE TOTAL ENVIRONMENT
Year 2020
Month June
Volume 722
Number
Pages
Abstract Road dust is a major reservoir of anthropogenic Pt and Rh. However, information about how these elements are released to the aquatic systems under environmentally relevant conditions is scarce. In this work, an innovative combination of analytical strategies is used to provide insight into the speciation analysis of those elements. A composite sample of road dust thoroughly characterized was incubated over 7 days in synthetic rainwater and seawater. In the filtered (<0.45 mu m) solutions, truly dissolved Pt and Rh concentrations were measured by adsorptive cathodic stripping voltammetry, while total concentrations were determined by inductively coupled plasma mass spectrometry. Truly dissolved species corresponded to a small fraction of total Pt and Rh in the road dust; accordingly, values of 0.01\% and 0.1\% were obtained in both media for Pt and Rh, respectively, which remained constant over time. The concentration of total filter-passing species predominates for both elements by a factor of 10 and 2-3 for Pt and Rh, respectively, evidencing that particulate species coexist with truly dissolved forms. Temporal variations were observed for Pt, as opposed to Rh. These findings contribute to the gap in knowledge regarding Pt and Rh mobility in aquatic systems. (C) 2020 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.scitotenv.2020.137954
ISBN
Publisher
Book Title
ISSN 0048-9697
EISSN 1879-1026
Conference Name
Bibtex ID ISI:000535720500019
Observations
Back to Publications List