长江口滨岸潮滩沉积物中磷的存在形态和分布特征

Phosphorous Species in Sediments and their Distribution in the Yangtze Estuary and Coastal Areas

通过对长江口滨岸潮滩表层及孔样沉积物中磷形态分析,揭示了潮滩沉积物中磷的存在形态及其 分布特征。分析结果表明,潮滩沉积物中磷主要有可溶性磷(、铁结合磷(、铝结合磷( DP ) Fe-P ) Al-、钙结合磷(和有机磷(种,其中以钙结合磷(和有机磷(为主。研究发现各P ) Ca-P ) OP ) 5 Ca-P ) OP ) 形态磷的含量分布与水体沉积环境和沉积物粒度关系密切,并受沿岸污水排放及近岸养殖排污等人为活动的影响。

Based on analyses of surface and core sediments in the tidal flats of the Yangtze ,Estuary and coastal areasthe present study reveals phosphorous species existing in sediments and their distributions. The results show that phosphorus in tidal flat sediments in the study area mainly ,,,,consists of inorganic phosphorous speciesinvolving DPFe-PAl-Pand Ca-P and organic phosphorous species, in which Ca-P and OP are dominant compositions. This findings indicate that the spatial distributions of various phosphorous forms are related to sedimentary environments in water and grain sizes of sediments, and are influenced by sewage discharges and effluents from cultivation ponds in the coastal areas.