Author, as appears in the article.: Marques, Montse; Mari, Montse; Audi-Miro, Carme; Sierra, Jordi; Soler, Albert; Nadal, Marti; Domingo, Jose L
Department: Enginyeria Química Ciències Mèdiques Bàsiques
URV's Author/s: Domingo Roig, José Luis / Mari Marcos, Montserrat / Marquès Bueno, Montserrat / Nadal Lomas, Martí
Keywords: Transport Time factors Temperature Soil pollutants Soil Services Products Polycyclic aromatic-hydrocarbons Polycyclic aromatic hydrocarbons (pahs) Polycyclic aromatic hydrocarbons Photolysis Photodegradation Persistent organic pollutants Models, theoretical Metabolites Mediterranean basin Light Isotope fractionation Hydrogen isotopes Humans Degradation Climate change Catalysis photodegradation metabolites hydrogen isotopes climate change
Abstract: Polycyclic aromatic hydrocarbons (PAHs) are airborne pollutants that are deposited on soils. As climate change is already altering temperature and solar radiation, the global warming is suggested to impact the environmental fate of PAHs. This study was aimed at evaluating the effect of climate change on the PAH photodegradation in soils. Samples of Mediterranean soils were subjected to different temperature and light radiation conditions in a climate chamber. Two climate scenarios were considered according to IPCC projections: 1) a base (B) scenario, being temperature and light intensity 20°C and 9.6W/m(2), respectively, and 2) a climate change (CC) scenario, working at 24°C and 24W/m(2), respectively. As expected, low molecular weight PAHs were rapidly volatilized when increasing both temperature and light intensity. In contrast, medium and high molecular weight PAHs presented different photodegradation rates in soils with different texture, which was likely related to the amount of photocatalysts contained in both soils. In turn, the hydrogen isotopic composition of some of the PAHs under study was also investigated to verify any degradation process. Hydrogen isotopes confirmed that benzo(a)pyrene is degraded in both B and CC scenarios, not only under light but also in the darkness, revealing unknown degradation processes occurring when light is lacking. Potential generation pathways of PAH photodegradation by-products were also suggested, being a higher number of metabolites formed in the CC scenario. Consequently, in a more or less near future, although humans might be less exposed to PAHs, they could be exposed to new metabolites of these pollutants, which might be even more toxic. Copyright © 2016. Published by Elsevier Ltd.
Thematic Areas: Zootecnia / recursos pesqueiros Saúde coletiva Química Medicina iii Medicina ii Medicina i Interdisciplinar Geociências General medicine General environmental science Farmacia Environmental sciences Environmental science (miscellaneous) Environmental science (all) Engenharias iv Engenharias ii Engenharias i Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Biotecnología Biodiversidade Astronomia / física Administração pública e de empresas, ciências contábeis e turismo
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 01604120
Author's mail: montserrat.marques@urv.cat joseluis.domingo@urv.cat marti.nadal@urv.cat montserrat.mari@urv.cat
Author identifier: 0000-0001-6302-8578 0000-0001-6647-9470 0000-0002-0217-4827 0000-0001-8971-3856
Record's date: 2025-03-15
Paper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Paper original source: Environment International. 89-90 (): 155-165
APA: Marques, Montse; Mari, Montse; Audi-Miro, Carme; Sierra, Jordi; Soler, Albert; Nadal, Marti; Domingo, Jose L (2016). Climate change impact on the PAH photodegradation in soils: Characterization and metabolites identification. Environment International, 89-90(), 155-165. DOI: 10.1016/j.envint.2016.01.019
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
Publication Type: Journal Publications
Repositori URV