模拟扰动情况下海洋表层沉积物中P的行为

Behavior of resuspended phosphorus in sea surface sediment in the simulate condition

2004年1月,采集汇泉湾低潮滩沉积物和水样,模拟沉积物和上层水体之间的P交换。通过实验,我们发现在静止条件下溶解态有机磷(DOP)和溶解态无机磷(DIP)具有相同的变化趋势。在较低的震荡速率(60次/min)下,DOP和DIP表现出和静止情况下类似的变化趋势。而在较高的震荡速率(120次/min、150次/min)下,沉积物和海水间的DOP和DIP交换表现出相反的变化趋势。DIP随震荡速率的增加,释放量也在逐渐增加。然而DOP的浓度却随震荡速率的增加而逐渐减小。通过对不同比例混合物的再悬浮实验发现海水中P的浓度和混合比例呈正相关。

The simulation of exchange of phosphorus between the sediment and water was made using sampling sediment and surface water from the tide nat of the Huiquan Bay. Through the experiment, the varieties of dissolved inorganic and dissolved organic phosphate＇s concentration have same trend under the static conditions, In the lower disturbance frequency（60times/min）, DOP and DIP have the similar variable trend with that in quiescence. However, In the higher disturbance frequency（ 120 times/min, 150 times/min）, the variety of DOP＇s concentration has an opposite trend with that of DIP＇s concentration. The concentration of DIP was increased with the increase of the disturbance frequency, but the concentration of DOP was reduced with the increase of the disturbance frequency, The concentration of phosphorus in water has a positive relation with the increasing ratios between the mass of sediment and the volume of sea water through the experiment.