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采用批量定时取样法和批量平衡振荡法研究了人工海水介质中阴离子表面活性剂十二烷基苯磺酸钠(SDBS)存在时,重油在胶州湾沉积物上的吸附行为.结果表明,重油在胶州湾沉积物上的吸附速率和吸附量均随SDBS初始浓度的增加而增大,吸附速率方程可以用伪二级动力学模型进行较好地描述,吸附等温线较好地符合Freundlich吸附模型,KF值随SDBS浓度增大而升高,较高的介质盐度和较低的温度有利于重油在沉积物上的吸附.热力学函数计算表明在283～308K范围,SDBS的存在使重油在吸附过程中的ΔGθ、ΔHθ、ΔSθ值更负,该过程是一个自发的、放热的、熵减小的物理吸附过程.
The adsorption behavior of heavy oil on sediments of Jiaozhou Bay in the presence of an anionic surfactant sodium dodecyl benzene sulfonate (SDBS) in artificial seawater was studied by batch timed sampling method and batch equilibrium oscillation method. The results showed that heavy oil The adsorption rate and adsorption capacity of sediment in Jiaozhou Bay increased with the increase of initial concentration of SDBS. The adsorption rate equation could be well described by the pseudo-second-order kinetic model. The adsorption isotherms fit the Freundlich adsorption model well, KF value increased with increasing concentration of SDBS, higher medium salinity and lower temperature were favorable for the adsorption of heavy oil on the sediments.The calculation of thermodynamic function showed that the presence of SDBS in the range of 283 ~ 308K allowed the heavy oil to adsorb on the sediments In the ΔGθ, ΔHθ, ΔSθ values more negative, the process is a spontaneous, exothermic, entropy reduction of the physical adsorption process.