摘要
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。
In the series papers,the releases of total hydrocarbon from the marine contaminated sediment in marine water at different mixed ratio,release time,mixed conditions have been studied.The test results show that the release degree depended on the mixed ratio greatly.The time to reach the dynamic equilibrium point is around 30min in the ratio(w/w) sediment and sea water is 1/8 and the time to reach the maximum initial release concentration is 10min after mixture.Wet sample is easier released than dry ones.The higher temperature and stronger string are more favorable for hydrocarbon release.The particulate size is finer and the initial release concentration is higher.
出处
《海洋环境科学》
CAS
CSCD
北大核心
1998年第2期29-34,共6页
Marine Environmental Science
