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Sediment Depth Attenuation of Biogenic Phosphorus Compounds Measured by 31P NMR
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- Ahlgren, Joakim (författare)
- Uppsala universitet,Avdelningen för analytisk kemi
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- Tranvik, Lars (författare)
- Uppsala universitet,Limnologi
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- Gogoll, Adolf (författare)
- Uppsala universitet,Organisk kemi I
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- Waldebäck, Monica (författare)
- Uppsala universitet,Avdelningen för analytisk kemi
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- Markides, Karin (författare)
- Uppsala universitet,Avdelningen för analytisk kemi
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- Rydin, Emil (författare)
- Uppsala universitet,Limnologi
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(creator_code:org_t)
- 2004-12-22
- 2005
- Engelska.
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Ingår i: Environmental Science and Technology. - Univ Uppsala, Dept Analyt Chem, SE-75124 Uppsala, Sweden. Univ Uppsala, Dept Ecol & Evolut, Uppsala, Sweden. Univ Uppsala, Dept Organ Chem, SE-75124 Uppsala, Sweden. : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 39:3, s. 867-872
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Being a major cause of eutrophication and subsequent loss of water quality, the turnover of phosphorus (P) in lake sediments is in need of deeper understanding. A major part of the flux of P to eutrophic lake sediments is organically bound or of biogenic origin. This P is incorporated in a poorly described mixture of autochthonous and allochthonous sediment and forms the primary storage of P available for recycling to the water column, thus regulating lake trophic status. To identify and quantify biogenic sediment P and assess its lability, we analyzed sediment cores from Lake Erken, Sweden, using traditional P fractionation, and in parallel, NaOH extracts were analyzed using 31P NMR. The surface sediments contain orthophosphates (ortho-P) and pyrophosphates (pyro-P), as well as phosphate mono- and diesters. The first group of compounds to disappear with increased sediment depth is pyrophosphate, followed by a steady decline of the different ester compounds. Estimated half-life times of these compound groups are about 10 yr for pyrophosphate and 2 decades for mono- and diesters. Probably, these compounds will be mineralized to ortho-P and is thus potentially available for recycling to the water column, supporting further growth of phytoplankton. In conclusion, 31P NMR is a useful tool to asses the bioavailability of certain P compound groups, and the combination with traditional fractionation techniques makes quantification possible.
Ämnesord
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- Analytical chemistry
- Analytisk kemi
- Organic chemistry
- Organisk kemi
- Terrestrial, freshwater and marine ecology
- Terrestisk, limnisk och marin ekologi
- limnologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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