Effects of aluminum treatment on phosphorus, carbon, and nitrogen distribution in lake sediment: A 31P NMR study
2006 (English)In: Water Research, no 40, 647-654 p.Article in journal (Refereed) Published
The effects of aluminum (A1) 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 Sönderby. 31P NMR spectroscopy analysis of EDTA-NaOH extracts revealed six functional P groups. Direct effects of the A1 treatment were reflected in the othophosphate profile revealing increased amounts of A1-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 A1 additon. Furthermore, changes in phytoplankton community structure and lowered production due to the A1 treatment resulted in decreased concentrations of sediment organic P groups and total C. Exponential regressions were used to describe the diagensisi of C, N, and P in the sediment. From these regressions , half-life degradation times and C, N, and P burial rates were determined.
Place, publisher, year, edition, pages
2006. no 40, 647-654 p.
Analytical Chemistry Organic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-83635DOI: doi:10.1016/j.watres.2005.12.014OAI: oai:DiVA.org:uu-83635DiVA: diva2:111543