Distribution and forms of phosphorus in tidal flat sediments of the Yangtze Estuary and coast |
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Authors: | Gao Xiaojiang Xu Shiyuan Zhang Nianli |
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Institution: | 1.Department of Environmental Science and Engineering, Fudan University, 200433, Shanghai, China ;2.Department of Geography, East China Normal University, 200062, Shanghai, China ; |
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Abstract: | The distribution and forms of phosphorus (P) were investigated in the tidal flat sediments of the Yangtze Estuary and coast. The total P contents in surface sediments range from 18.0 to 31.4 μmol·g-1 along the southern coast. The spatial and temporal distribution of P in tidal flats is closely related to the location and pollution resources, especially in association with the variation of hydrodynamic conditions. Significant variations in the forms of P in different sites were observed. P bonded with Ca(Ca-P) is the dominant mineral form in all surface sediments, organic P(Org-P) is lower. Most P is of unstable form, suggesting that P has larger potential activity. P accumulation is the main behavior process between water and sediment in the coastal environment of the Yangtze Estuary. |
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