Home > Publications database > Phosphorus forms in forest soil colloids as revealed by liquid-state 31P-NMR |
Journal Article | FZJ-2016-01739 |
; ; ; ;
2016
Wiley-VCH
Weinheim
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Please use a persistent id in citations: http://hdl.handle.net/2128/10256 doi:10.1002/jpln.201500119
Abstract: Nanoparticles and colloids affect the storage and hence the availability of P in forest ecosystems. We investigated the fine colloids present in forest soils and their association with inorganic and organic P. To differentiate between the different P forms, we performed liquid-state 31P-nucelar magnetic resonance (31P-NMR) measurements on forest bulk soil extracts, on colloid extracts and on the electrolyte phase of their soil suspensions. The 31P-NMR spectra indicated that soil nanoparticles and colloids were more enriched with organic than with inorganic P forms compared to the electrolyte phase. The P concentration was enriched in the colloidal fraction in comparison to the bulk soil and the phosphate diesters were more dominant in the colloidal fraction when compared to the bulk soil. The colloidal P-diester to P-monoester ratios were 2 to 3 times higher in the colloidal fraction than in the bulk soil. In contrast, relatively large percentages of inorganic P were found in the electrolyte phase
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