污水颗粒磷在海水中的释放作用

本文模拟研究了污水颗粒物－海水体系中磷的转移过程。污水颗粒物与海水混合之后先是快速吸附磷，之后即以约０．３ｄ＾－１的速率进行释放。总过程仍表现为磷的释放。磷的吸附－释放属于离子交换性质，可用交换平衡动力学模式表示。溶解磷含量的增加速率符合一级动力学方程。

Release of phosphorus in wastewater particle-seawater system

The transfer processes of phosphorus between wastewater particles and seawater during the effluents discharge into the Xiamen Harbour where simulated. The results indicate that the particulate phosphorus can be released in seawater and reduces the envir0nment capacity of phosphorus. The factor sh0uld be taken into account in the environment capacity assessment of phosphorus.Phosphorus is adsorped initially and then released continully from particulate form. Theadsorption-release of phosphorus follows its ion-exchang property and can be expressed bythe exchange-adsorption kinetic equation t/x (t) =t/x(eq) B'. The equilibrium release xa(eq) calculated from the equation agrees well with the measured.The increase rate of diss0lved phosphorus is c0ntrolled by the first-order kinetic model:InC=kt B. The increase rate constant k is protimately the value of 0. 3 d-1 under the experimental conditions.