Title: Release of phosphorus in sediments from a tributary of the Three Gorges Reservoir (China) with phosphate-solubilising bacteria

Authors: Ying Wang, Zhenyao Shen

Addresses: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. ' State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China

Abstract: Inorganic Phosphate-solubilising Bacteria (IPB) and Organic Phosphate-mineralising Bacteria (OPB) was isolated from DaNing River which was an important tributary of the Three-Gorges Reservoir (China), and their abilities for P release from sediment were evaluated in batch experiments. The results showed that IPB and OPB may not only enhance P release, but also reserve P as organic P and inorganic P forms inside the cells. Higher temperature promoted P release and reserve inside the bacteria. Lower dissolved oxygen debased P reserved inside the bacteria, but made more Fe-bound P released, which enhanced the concentration of phosphate in water.

Keywords: phosphorus release; sediments; PSB; phosphate-solubilising bacteria; Three Gorges Reservoir; China; phosphorus-existing forms; AKP; alkaline phosphatase; temperature; dissolved oxygen; eutrophication; water pollution; water quality.

DOI: 10.1504/IJEP.2011.039091

International Journal of Environment and Pollution, 2011 Vol.45 No.1/2/3, pp.145 - 156

Available online: 16 Mar 2011 *

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