上海滨岸潮滩不同粒径沉积物中无机形态磷的分布特征

Distribution feature of inorganic phosphorous in tidal sediments at different grain sizes taken from Shanghai coastal zone

以地理环境独特的上海滨岸带为研究对象 ,根据对冬季潮滩悬浮层、表层沉积物的研究 ,初步探讨了潮滩不同粒径沉积物中各无机形态磷的地球化学特征 :DP、(Fe +Al) P在靠近排污口的采样点含量高 ,同时随粒径变化复杂 ;沉积物中 (Fe +Al) P含量随粒径变大而升高 ,悬浮层沉积物中 (Fe +Al) P更能指示环境的污染状况 ;一般细粉砂质沉积物中Ca

Based on the analysis of tidal suspended and surface sediments taken from Shanghai coastal zone in winter, where there is characteristic by the special natural geographical environment as a study subject, this paper presents the geochemical feature of inorganic phosphorous species in tidal sediments of different grain sizes. It shows that the content of DP with (Fe+Al) P is higher in some sampling sites near sewage discharge outlets, and its range is complex with grain size variation. The content of (Fe+Al)-P increases with grain size increasing, while (Fe+Al) P concentration levels in suspended sediments can be used as one of indications for coastal environmental contamination. Generally the content of Ca P is higher in fine silt sediments.