论文部分内容阅读
通过实验室动态模拟实验，研究了在不同固／液比例、溶出温度、搅拌强度、沉积物的粒度等条件下，近岸海洋沾污沉积物中石油烃类化合物的释放过程。研究结果表明，石油烃类化合物的溶出浓度与参与溶出过程的固／液相比例成正比：当固液相比例为１／８时，可在３０ｍｉｎ之内确定溶出／吸附过程的动态平衡点。沉积物中石油烃类物质向海水中的释放，在１０ｍｉｎ之内，可基本达到最大初始浓度；未经处理的新鲜沉积物样品较烘干研磨样品，更利于油类的释放。溶出温度的升高及剧烈的反应条件，有利于沉积物中石油烃类物质向海水中的释放。沉积物的组成颗粒愈细，释放的初始浓度愈高。
Through laboratory dynamic simulation experiments, the release process of petroleum hydrocarbons in marine sediment was studied under different conditions of solid / liquid ratio, dissolution temperature, stirring intensity and sediment particle size. The results show that the leaching concentration of petroleum hydrocarbons is proportional to the ratio of solid / liquid phases involved in the leaching process. When the ratio of solid to liquid is 1/8, the dynamic equilibrium point of leaching / adsorption process can be determined within 30 minutes. In the sediments, the release of petroleum hydrocarbons into seawater can reach the maximum initial concentration within 10min. The fresh sediment samples without drying are more conducive to the oil release than the dry samples. The increase of dissolution temperature and violent reaction conditions are favorable for the release of petroleum hydrocarbons in sediments into seawater. Sediment composition of the finer particles, the initial release of the higher the concentration.