Author, as appears in the article.: Marquès M, Mari M, Sierra J, Nadal M, Domingo JL.

Department: Ciències Mèdiques Bàsiques Enginyeria Química

URV's Author/s: Domingo Roig, José Luis / Mari Marcos, Montserrat / Marquès Bueno, Montserrat / Nadal Lomas, Martí

Keywords: Solar radiation Soil Polycyclic aromatic hydrocarbons (pahs) Photodegradation Pahs By-products soil polycyclic aromatic hydrocarbons (pahs) photodegradation by-products

Abstract: The photodegradation of polycyclic aromatic hydrocarbons (PAHs) may be an important degradation pathway of PAHs in regions with a high solar radiation. The present investigation was aimed at studying the photodegradation of PAHs after their deposition on surface soils with different textures. Photodegradation by-products were also identified and semi-quantified, as well as correlated with the decrease of parent compounds. The experiment was performed by deploying soil samples spiked with a mixture of the 16 US EPA priority PAHs in a methacrylate box, exposed to solar radiation for 7 days, meaning a solar energy of 102.6 MJ m− 2. As hypothesized, the individual PAHs were volatilized, sorbed and/or photodegraded, depending on their physicochemical properties, as well as the soil characteristics. Low and medium molecular weight PAHs were more sorbed and photodegraded in fine-textured Regosol soil, while a higher volatilization was observed in the coarse-textured Arenosol soil. In contrast, high molecular weight PAHs were more photodegraded in Arenosol soil. Specially low half-lives were noted for anthracene and benzo(a)pyrene, agreeing with previous findings at laboratory scale. Nine by-products were identified, including oxy-, nitro- and hydro-PAHs, whose toxic and mutagenic potential might be higher than the 16 priority PAHs.

Thematic Areas: Zootecnia / recursos pesqueiros Waste management and disposal Saúde coletiva Química Pollution Odontología Nutrição Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Historia Geografía Geociências Farmacia Environmental sciences Environmental engineering Environmental chemistry Ensino Engenharias iii Engenharias ii Engenharias i Enfermagem Direito Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Biotecnología Biodiversidade Astronomia / física

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 00489697

Author's mail: montserrat.marques@urv.cat marti.nadal@urv.cat montserrat.mari@urv.cat marti.nadal@urv.cat joseluis.domingo@urv.cat

Author identifier: 0000-0001-6302-8578 0000-0002-0217-4827 0000-0001-8971-3856 0000-0002-0217-4827 0000-0001-6647-9470

Record's date: 2023-02-22

Papper version: info:eu-repo/semantics/submittedVersion

Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0048969716328509

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Science Of The Total Environment. 581-582 530-540

APA: Marquès M, Mari M, Sierra J, Nadal M, Domingo JL. (2017). Solar radiation as a swift pathway for PAH photodegradation: A field study. Science Of The Total Environment, 581-582(), 530-540. DOI: 10.1016/j.scitotenv.2016.12.161

Article's DOI: 10.1016/j.scitotenv.2016.12.161

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

Publication Type: Journal Publications