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dc.contributor.authorVähätalo, Anssi V.
dc.contributor.authorXiao, Yihua
dc.contributor.authorSalonen, Kalevi
dc.date.accessioned2021-10-21T06:32:40Z
dc.date.available2021-10-21T06:32:40Z
dc.date.issued2021
dc.identifier.citationVähätalo, A. V., Xiao, Y., & Salonen, K. (2021). Biogenic Fenton process : A possible mechanism for the mineralization of organic carbon in fresh waters. <i>Water Research</i>, <i>188</i>, Article 116483. <a href="https://doi.org/10.1016/j.watres.2020.116483" target="_blank">https://doi.org/10.1016/j.watres.2020.116483</a>
dc.identifier.otherCONVID_43405902
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/78290
dc.description.abstractTo explore the mechanisms that mineralize poorly bioavailable natural organic carbon (OC), we measured the mineralization of OC in two lake waters over long-term experiments (up to 623 days) at different pH and iron (Fe) levels. Both the microbial and photochemical mineralization of OC was higher at pH acidified to 4 than at the ambient pH 5 or an elevated pH 6. During 244 days, microbes mineralized up to 60% of OC in the 10-µm filtrates of lake water and more than 27% in the 1-µm filtrates indicating that large-sized microbes/grazers enhance the mineralization of OC. A reactivity continuum model indicated that the acidification stimulated the microbial mineralization of OC especially in the later (>weeks) phases of experiment when the bioavailability of OC was poor. The reactive oxygen species produced by light or microbial metabolism could have contributed to the mineralization of poorly bioavailable OC through photochemical and biogenic Fenton processes catalyzed by the indigenous Fe in lake water. When Fe was introduced to artificial lake water to the concentration found in the study lakes, it increased the densities of bacteria growing on solid phase extracted dissolved organic matter and in a larger extent at low pH 4 than at pH 5. Our results suggest that in addition to the photochemical Fenton process (photo-Fenton), microbes can transfer poorly bioavailable OC into labile forms and CO2 through extracellular Fe-catalyzed reactions (i.e., biogenic Fenton process).en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofseriesWater Research
dc.rightsCC BY-NC-ND 4.0
dc.subject.otherbiogenic Fenton
dc.subject.otheriron
dc.subject.othermicrobes
dc.subject.otherorganic carbon
dc.subject.otherreactive oxygen species
dc.subject.otherreactivity continuum.
dc.titleBiogenic Fenton process : A possible mechanism for the mineralization of organic carbon in fresh waters
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202110215322
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.volume188
dc.type.versionacceptedVersion
dc.rights.copyright© 2020 Elsevier Ltd. All rights reserved.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber295709
dc.subject.ysokemialliset reaktiot
dc.subject.ysomikrobit
dc.subject.ysohiilen kierto
dc.subject.ysomineralisaatio
dc.subject.ysorauta
dc.subject.ysojärvet
dc.subject.ysoliuennut orgaaninen hiili
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p3658
jyx.subject.urihttp://www.yso.fi/onto/yso/p5424
jyx.subject.urihttp://www.yso.fi/onto/yso/p28986
jyx.subject.urihttp://www.yso.fi/onto/yso/p27691
jyx.subject.urihttp://www.yso.fi/onto/yso/p11738
jyx.subject.urihttp://www.yso.fi/onto/yso/p9374
jyx.subject.urihttp://www.yso.fi/onto/yso/p29461
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1016/j.watres.2020.116483
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramTutkijatohtori, SAfi
jyx.fundingprogramPostdoctoral Researcher, AoFen
jyx.fundinginformationThis study was supported by the Academy of Finland Grant (No. 295709), the Taishan Scholar Foundation of Shandong Province (No. tsqn201909126), the Commission of European Communities (No. STEP-CT90-0112) and the CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, YICCAS (No. 2020KFJJ12).


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