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dc.contributor.authorXiao, Yihua
dc.contributor.authorCarena, Luca
dc.contributor.authorNäsi, Marja-Terttu
dc.contributor.authorVähätalo, Anssi V.
dc.date.accessioned2020-04-17T04:56:47Z
dc.date.available2020-04-17T04:56:47Z
dc.date.issued2020
dc.identifier.citationXiao, 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. <i>Water Research</i>, <i>177</i>, Article 115782. <a href="https://doi.org/10.1016/j.watres.2020.115782" target="_blank">https://doi.org/10.1016/j.watres.2020.115782</a>
dc.identifier.otherCONVID_35193994
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/68569
dc.description.abstractWe 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.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofseriesWater Research
dc.rightsCC BY-NC-ND 4.0
dc.subject.otherdissolved organic matter
dc.subject.otheriron
dc.subject.othersuperoxide
dc.subject.otherhydroxyl radicals
dc.subject.otherproduction rate
dc.subject.otherabsorption
dc.titleSuperoxide-driven autocatalytic dark production of hydroxyl radicals in the presence of complexes of natural dissolved organic matter and iron
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202004172792
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineYmpäristötiedefi
dc.contributor.oppiaineEnvironmental Scienceen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0043-1354
dc.relation.volume177
dc.type.versionacceptedVersion
dc.rights.copyright© 2020 Elsevier Ltd.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber295709
dc.subject.ysorauta
dc.subject.ysoorgaaninen aines
dc.subject.ysohajoaminen (kemia)
dc.subject.ysovapaat radikaalit
dc.subject.ysooksidit
dc.subject.ysokatalyysi
dc.subject.ysoimeytyminen
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p11738
jyx.subject.urihttp://www.yso.fi/onto/yso/p14873
jyx.subject.urihttp://www.yso.fi/onto/yso/p38425
jyx.subject.urihttp://www.yso.fi/onto/yso/p2983
jyx.subject.urihttp://www.yso.fi/onto/yso/p2803
jyx.subject.urihttp://www.yso.fi/onto/yso/p8704
jyx.subject.urihttp://www.yso.fi/onto/yso/p3657
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1016/j.watres.2020.115782
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramTutkijatohtori, SAfi
jyx.fundingprogramPostdoctoral Researcher, AoFen
jyx.fundinginformationThis study was financially supported by the Academy of Finland Grant (No. 295709) and Taishan Scholar Foundation of Shandong Province (No. tsqn201909126). The stay of L.C. in Jyväskylä was financially supported by the Erasmus + Traineeship programme. L.C. acknowledges Compagnia di San Paolo (Torino, Italy) for financially supporting his Ph.D. fellowship.


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