A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Superoxide-driven autocatalytic dark production of hydroxyl radicals in the presence of complexes of natural dissolved organic matter and iron (2020)


Xiao, Y., Carena, L., Näsi, M.-T., & Vähätalo, A. V. (2020). Superoxide-driven autocatalytic dark production of hydroxyl radicals in the presence of complexes of natural dissolved organic matter and iron. Water Research, 177, Article 115782. https://doi.org/10.1016/j.watres.2020.115782


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajatXiao, Yihua; Carena, Luca; Näsi, Marja-Terttu; Vähätalo, Anssi V.

Lehti tai sarjaWater Research

ISSN0043-1354

eISSN1879-2448

Julkaisuvuosi2020

Volyymi177

Artikkelinumero115782

KustantajaElsevier

JulkaisumaaBritannia

Julkaisun kielienglanti

DOIhttps://doi.org/10.1016/j.watres.2020.115782

Julkaisun avoin saatavuusEi avoin

Julkaisukanavan avoin saatavuus

Julkaisu on rinnakkaistallennettu (JYX)https://jyx.jyu.fi/handle/123456789/68569


Tiivistelmä

We introduced superoxide as potassium superoxide (KO2) to artificial lake water containing dissolved organic matter (DOM) without or with introduced ferric iron complexes (DOM-Fe), and monitored the production rate of hydroxyl radicals as well as changes in the absorption and fluorescence properties of DOM. The introduction of KO2 decreased the absorption by DOM but increased the spectral slope coefficient of DOM more with complexed ferric Fe than without it. The introduction of KO2 increased the fluorescence of humic-like components in DOM without introduced ferric Fe but resulted in the loss of fluorescence in DOM with introduced ferric Fe. A single introduction of 13 μmol L−1 KO2 produced 10 μmol L−1 and 104 μmol L−1 hydroxyl radicals during a week-long experiment without and with the introduced DOM-Fe complexes, respectively. The production rate of hydroxyl radicals decreased exponentially with time but levelled off and continued several days in DOM with introduced ferric Fe. These findings suggest that in the presence of DOM-Fe complexes, superoxide can trigger an autocatalytic Fenton reaction that produces hydroxyl radicals and breaks down DOM.


YSO-asiasanatorgaaninen aineshajoaminen (kemia)rautaoksiditkatalyysivapaat radikaalitimeytyminen

Vapaat asiasanatdissolved organic matter; iron; superoxide; hydroxyl radicals; production rate; absorption


Liittyvät organisaatiot


Hankkeet, joissa julkaisu on tehty


OKM-raportointiKyllä

Raportointivuosi2020

JUFO-taso3


Viimeisin päivitys 2024-03-04 klo 21:26