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1994年5月—1995年6月，利用黄河口悬浮颗粒物，在实验室内于不同温度、盐度、磷酸盐浓度、pH值及悬浮物粒度条件下进行了悬浮物对磷酸盐的吸附和解吸模拟实验，通过水体中几种磷—钙矿物的离子平衡计算，对黄河口磷酸盐的缓冲机制进行了探讨。结果表明，黄河口现场条件下水体中钙与磷之间存在某些离子平衡，黄河口水体中磷—钙矿物的离子积受温度、悬浮物种类及粒度影响较小，而与水体盐度、磷酸盐及钙含量有关，但不足以形成磷—钙矿物沉淀；磷—钙矿物的沉淀和溶解在黄河口磷酸盐浓度的控制机制上所起的作用较小，而悬浮颗粒物表面对磷酸盐的吸附和解吸起了较大的作用。
From May 1994 to June 1995, the suspended particles in the Yellow River Estuary were used to adsorb and desorb the phosphate from the suspended solids in the laboratory under different temperature, salinity, phosphate concentration, pH value and particle size. In the simulation experiment, the buffer mechanism of phosphate in Huanghekou was discussed through the ionic balance calculation of several phosphorus-calcium minerals in water. The results showed that there was some ion balance between calcium and phosphorus in the water of the Yellow River Estuary. The ion volume of the phosphorus-calcium mineral in the Yellow River Estuary was less affected by the temperature and the type of suspended solids and the particle size, Phosphate and calcium content, but not enough to form a precipitate of phosphorus-calcium minerals. Phosphate-calcium mineral sedimentation and dissolution in the Yellow River mouth phosphate concentration control mechanism plays a smaller role, while the suspended particles on the surface of the phosphate Adsorption and desorption play a greater role.