九龙江河口颗粒磷的分布特征

Characteristics of particulatc phosphate at Jiulong River Estuary and Xiamen Harbour

研究了厦门西港,九龙江口春季悬浮颗粒磷和表层沉积物中磷的分布特征,悬浮颗粒磷或表层沉积物中磷的含量都随盐度增大而增大,有机和弱结合磷占总磷的比例也相应增大,颗粒磷和颗粒碳,弱结合态铁、硅含量之间存在正相关关系,表明颗粒物质及Fe、Si参与的絮凝,吸附和自生等物理化学过程,对九龙江口颗粒磷的地球化学行为起重要作用。此外,污水排泄等人为输入,水动力条件,有机质含量和颗粒物类型等都在一定程度上控制着水体中颗粒磷的地球化学行为。

Distributions of phosphate in suspended particles and surface sediments at Jiulong River estuary and Xiamen Harbour were investigated during March and April, 1986. It was found that the concentrations f phosphate, either in suspended particles or surface sediment, increased witbo the salinity gradient, the oxidizable and exchangeable fractions increased as well. And also, the contents of phosphate closely correlated with participate organic carbon and weak acid teachable iron and silicate. These indicated that besides biological processes, the physico-chemical processes of the partidesinvol ving iron and silicate (such as flocculation, adsorption aad au-thigenesisprccesses) are the important controlmechanisms of particiculate phos-phatesat Jiulong River estuary and Xiamen Harbour