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Global modeling of lake-water indirect photochemistry based on the equivalent monochromatic wavelength approximation: The case of the triplet states of chromophoric dissolved organic matter

Articolo
Data di Pubblicazione:
2023
Abstract:
Chromophoric dissolved organic matter (CDOM) plays key role as photosensitizer in sunlit surface-water environments, and it is deeply involved in the photodegradation of contaminants. It has recently been shown that sunlight absorption by CDOM can be conveniently approximated based on its monochromatic absorption at 560 nm. Here we show that such an approximation allows for the assessment of CDOM photoreactions on a wide global scale and, particularly, in the latitude belt between 60°S and 60°N. Global lake databases are currently incomplete as far as water chemistry is concerned, but estimates of the content of organic matter are available. With such data it is possible to assess global steady-state concentrations of CDOM triplet states (3CDOM*), which are predicted to reach particularly high values at Nordic latitudes during summer, due to a combination of high sunlight irradiance and elevated content of organic matter. For the first time to our knowledge, we are able to model an indirect photochemistry process in inland waters around the globe. Implications are discussed for the phototransformation of a contaminant that is mainly degraded by reaction with 3CDOM* (clofibric acid, lipid regulator metabolite), and for the formation of known products on a wide geographic scale.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Photochemistry, Surface waters, Micropollutants, Decontamination, Ecotoxicological risk assessment
Elenco autori:
Luca Carena, Ángela García-Gil, Javier Marugán, Davide Vione
Autori di Ateneo:
CARENA Luca
VIONE Davide Vittorio
Link alla scheda completa:
https://iris.unito.it/handle/2318/1945322
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1945322/1213312/WR2023_lakes.pdf
Pubblicato in:
WATER RESEARCH
Journal
Progetto:
GRINS - Growing Resilient, INclusive and Sustainable - PNRR M4C2 Investimento 1.3 Avviso 341/2022
  • Dati Generali
  • Aree Di Ricerca

Dati Generali

URL

https://www.sciencedirect.com/science/article/pii/S0043135423005894

Aree Di Ricerca

Settori (8)


PE10_9 - Biogeochemistry, biogeochemical cycles, environmental chemistry - (2022)

PE4_18 - Environment chemistry - (2022)

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Cambiamenti Climatici

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Chimica e Ambiente

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Energia e Fonti Energetiche

PIANETA TERRA, AMBIENTE, CLIMA, ENERGIA e SOSTENIBILITA' - Protezione e prevenzione del territorio dai rischi naturali, ambientali e antropici

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Chimica Organica e Industriale

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Materiali Avanzati
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