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Retention of chloride in soil and cycling of organic matter-bound chlorine
Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Thematic Studies, Environmental Science.
Linköping University, Faculty of Arts and Sciences. Linköping University, The Tema Institute.
2005 (English)In: Hydrological Processes, ISSN 0885-6087, Vol. 19, no 11, 2123-2136 p.Article in journal (Refereed) Published
Abstract [en]

Chloride (Cl-inorg) is generally considered to be a hydrologically and chemically inert substance. Past research suggests that Cl-inorg participates in a complex biogeochemical cycle involving the formation of organically bound chlorine (Cl-org). The present study examines whether Cl-org cycling is sufficiently extensive as to influence the geochemical cycling Of Cl-inorg- Undisturbed soil cores were collected in a coniferous forest soil in SE Sweden. The cores were stored in climate chambers for three months, irrigated with artificial rain, and the leachate was collected and analysed. The water balance of the lysimeters could be well described, and we found that 20-50% of the chlorine leached from the lysimeters was organically bound and that the amounts lost did not decrease with time. This strongly suggests that a substantial amount of Cl-inorg forms in topsoil, and that subsequent leaching to deeper layers causes a considerable withdrawal of Cl-inorg. The concentration of both organic carbon and Cl-inorg in the leachate was considerably higher than concentrations observed in the runoff in the actual catchment, suggesting that organic matter precipitates or is mineralized on its way through the soil. Copyright (c) 2005 John Wiley & Sons, Ltd.

Place, publisher, year, edition, pages
2005. Vol. 19, no 11, 2123-2136 p.
Keyword [en]
organic chlorine, organochlorine, chlorinated organic matter, chloride, withdrawal, cycling, biogeochemistry
National Category
Social Sciences
URN: urn:nbn:se:liu:diva-46049DOI: 10.1002/hyp.5680OAI: diva2:266945
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-12

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Öberg, GunillaSandén, Per
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