近岸海洋沾污沉积物中石油烃类化合物释放过程的实验室研究──Ⅱ.实验室静态模拟研究

Preliminary study on the release of total hydrocarbon from the marine contaminated sediment in marine water──Ⅱ. Static imitation test

本文通过使用在较为接近自然环境条件的实验室模拟技术，探讨了近岸沾污沉积物中石油烃类物质在沉积物／海水界面的溶出／吸附过程。静态模拟实验研究结果显示：所选沾污沉积物在本实验条件下，其最大溶出浓度出现在固液混合后17～26d，反应接触面积与该值的出现时间关系密切；沉积物中石油烃类物质的溶出／吸附达到溶出平衡点的时间，一般出现在反应物混合后50d左右；在其他反应条件确定的前提下，油类物质的溶出强度，取决于沉积物与水相接触面积，而与滞留在表层沉积物以下的沉积物数量关系甚微；溶出石油浓度的垂直分布显示，其实验水体中石油的溶出浓度为：底部≥表层＞中间。

In the series papers, the release of total hydrocarbon from the marine contaminatedsediment in marine water at the near natural condition were studied. The test results show the release concentration reached the maximum point after the mix 17 -26 days depended on the interface surface area. The time to reach the static equilibrium point is around 50 days, which is depended on the interface and the relationship between the volume of sediment and release concentration has been not found if the other conditions were definite. The vertical distribution of the release hydrocarbon concentration indicates the concentration gradient of the release hydrocarbon atinterested water column is bottom≥surface ＞ middle.