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The acid-base properties of high and low molecular weight organic acids in soil solutions of podzolic soils
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Department of Chemistry, Royal Institute of Technology, .
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
2000 (English)In: Geoderma, ISSN 0016-7061, E-ISSN 1872-6259, Vol. 94, no 2-4, 223-235 p.Article in journal (Refereed) Published
Abstract [en]

The acid properties of the organic acids and identified low molecular weight (LMW) organic acids in soil solutions of podzolic soils were determined using proton affinity spectra, based on EMF titration data, and Gran titrations. The proton affinity spectra showed apparent pKa values of 2.6, 4.1, 5.4 and 6.7 for the dissolved organic material. The LMW organic acids had similar pKa values. The average specific buffer capacity as determined by Gran titrations was 8.8±0.5 μmol H+/mg DOC. The specific buffer capacity for the identified low molecular acids was 40±2 μmol H+/mg DOC.

Place, publisher, year, edition, pages
2000. Vol. 94, no 2-4, 223-235 p.
Keyword [en]
organic acid podzol
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-2386DOI: 10.1016/S0016-7061(99)00037-3ISI: 000085352500009Scopus ID: 2-s2.0-0033952212Local ID: 2043OAI: oai:DiVA.org:miun-2386DiVA: diva2:27418
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2016-10-10Bibliographically approved

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