Effects of aluminum treatment on phosphorus, carbon, and nitrogen distribution in lake sediment: A P-31 NMR study
2006 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 40, no 4, 647-654 p.Article in journal (Refereed) PublishedText
The effects of aluminum (Al) treatment on sediment composition of carbon (C), nitrogen (N) and phosphorus (P) were investigated in sediment representing pre- and post-treatment years in the Danish Lake Sonderby. P-31 NMR spectroscopy analysis of EDTA-NaOH extracts revealed six functional P groups. Direct effects of the Al treatment were reflected in the orthophosphate profile revealing increased amounts of AI-P in the sediment layers representing the post-treatment period, as well as changes in organic P groups due to precipitation of phytoplankton and bacteria at the time of Al addition. Furthermore, changes in phytoplankton community structure and lowered production due to the Al treatment resulted in decreased concentrations of sediment organic P groups and total C. Exponential regressions were used to describe the diagenesis of C, N, and P in the sediment. From these regressions, half-life degradation times and C, N, and P burial rates were determined. (c) 2006 Elsevier Ltd. All rights reserved.
Place, publisher, year, edition, pages
Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark. Uppsala Univ, Dept Analyt Chem, S-75124 Uppsala, Sweden. Uppsala Univ, Dept Organ Chem, S-75124 Uppsala, Sweden. Uppsala Univ, EBC, Dept Ecol & Evolut, S-75236 Uppsala, Sweden., 2006. Vol. 40, no 4, 647-654 p.
Al-treatment, lake sediment, organic phosphorus, P-31 NMR
Research subject Limnology
IdentifiersURN: urn:nbn:se:umu:diva-113619DOI: 10.1016/j.watres.2005.12.014ISI: 000235949800002PubMedID: 16427681OAI: oai:DiVA.org:umu-113619DiVA: diva2:886054