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Influence of Multiple Environmental Factors on Organic Matter Chlorination in Podsol Soil
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.ORCID iD: 0000-0002-6471-143X
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
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2017 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 51, no 24, p. 14114-14123Article in journal (Refereed) Published
Abstract [en]

Natural chlorination of organic matter is common in soils. The abundance of chlorinated organic compounds frequently exceeds chloride in surface soils, and the ability to chlorinate soil organic matter (SOM) appears widespread among microorganisms. Yet, the environmental control of chlorination is unclear. Laboratory incubations with Cl-36 as a Cl tracer were performed to test how combinations of environmental factors, including levels of soil moisture, nitrate, chloride, and labile organic carbon, influenced chlorination of SOM from a boreal forest. Total chlorination was hampered by addition of nitrate or by nitrate in combination with water but enhanced by addition of chloride or most additions including labile organic matter (glucose and maltose). The greatest chlorination was observed after 15 days when nitrate and water were added together with labile organic matter. The effect that labile organic matter strongly stimulated the chlorination rates was confirmed by a second independent experiment showing higher stimulation at increased availability of labile organic matter. Our results highlight cause-effect links between chlorination and the studied environmental variables in podsol soil-with consistent stimulation by labile organic matter that did overrule the negative effects of nitrate.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 51, no 24, p. 14114-14123
National Category
Soil Science
Identifiers
URN: urn:nbn:se:liu:diva-144266DOI: 10.1021/acs.est.7b03196ISI: 000418625900013PubMedID: 29172517Scopus ID: 2-s2.0-85037569039OAI: oai:DiVA.org:liu-144266DiVA, id: diva2:1173485
Note

Funding Agencies|Swedish Research Council (VR); Swedish Nuclear Fuel and Waste Management Company (SKB)

Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-02-05Bibliographically approved

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The full text will be freely available from 2018-11-27 13:56
Available from 2018-11-27 13:56

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