A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Wavelength trends of photoproduction of reactive transient species by chromophoric dissolved organic matter (CDOM), under steady-state polychromatic irradiation (2022)

Bacilieri, F., Vähätalo, A. V., Carena, L., Wang, M., Gao, P., Minella, M., & Vione, D. (2022). Wavelength trends of photoproduction of reactive transient species by chromophoric dissolved organic matter (CDOM), under steady-state polychromatic irradiation. Chemosphere, 306, Article 135502. https://doi.org/10.1016/j.chemosphere.2022.135502

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Bacilieri, Federico; Vähätalo, Anssi V.; Carena, Luca; Wang, Mingjie; Gao, Pin; Minella, Marco; Vione, Davide

Lehti tai sarja: Chemosphere

ISSN: 0045-6535

eISSN: 1879-1298

Julkaisuvuosi: 2022

Volyymi: 306

Artikkelinumero: 135502

Kustantaja: Elsevier BV

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.chemosphere.2022.135502

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus: 

Rinnakkaistallenteen verkko-osoite (pre-print): https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4096064

Tiivistelmä

The formation quantum yields of photochemically produced reactive intermediates (PPRIs) by irradiated CDOM (in this study, Suwannee River Natural Organic Matter and Upper Mississippi River Natural Organic Matter) decrease with increasing irradiation wavelength. In particular, the formation quantum yields of the excited triplet states of CDOM (3CDOM*) and of singlet oxygen (1O2) have an exponentially decreasing trend with wavelength. The •OH wavelength trend is different, because more effective •OH production occurs under UVB irradiation than foreseen by a purely exponential function. We show that the parameter-adjustable Weibull function (which adapts to both exponential and some non-exponential trends) is suitable to fit the mentioned quantum yield data, and it is very useful when CDOM irradiation is carried out under polychromatic lamps as done here. Model calculations suggest that, thanks to the ability of CDOM to also absorb visible radiation, and despite its decreasing quantum yield of •OH generation with increasing wavelength, CDOM would be able to trigger •OH photogeneration in deep waters, to a higher extent than UVB-absorbing nitrate or UVB + UVA-absorbing nitrite.

YSO-asiasanat: orgaaninen aines; säteilytys

Vapaat asiasanat: chromophoric dissolved organic matter; hydroxyl radical; triplet states; weibull function; polychromatic irradiation; singlet oxygen

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2022

JUFO-taso: 1