Characteristics of Organic Phosphorus in a Shallow Lake Gehu investigated by Sequential Fractionation and 31P-NMR Technicals

Abstract:

Organic phosphorus in sediments of lake Gehu in China was investigated and researched via two methods: chemical fractionation and phosphorus-31 nuclear magnetic resonance spectroscopy. Results of chemical fractionation suggested that concentration of each organic phosphorus species in different sediments may varied highly since different condition, but showed a rank trend : residual Po> HCl-Po> Fulvic-Po> Humic-Po>NaHCO3-Po. Labile and moderately labile Po , regarded as potential P , contributed to 33.6% to 64.6% relative to total Po, which can be degraded for phytoplankton. 31P-NMR results suggested that the rank order of P species presented in NaOH-EDTA extractants of sediments: orthophosphate> monoester-P> DNA-P> pyrophosphate-P, and polyphosphate and phosphonate were almost not detected.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 3529-3539
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.3529
• Online since: June 2014
• Authors: Yi Min Zhang*, Jing Chen, Yue Xiang Gao, Long Mian Wang, Fei Yang
• Keywords: 31P-NMR, Fractionation, Lake Gehu, NaOH-EDTA, Sediment

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