| SDBS对重油在胶州湾沉积物上吸附行为的影响 |
| 摘要点击 2171 全文点击 1445 投稿时间：2010-11-06 修订日期：2011-01-27 |
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| 中文关键词 重油 SDBS 胶州湾 沉积物 吸附 动力学 热力学 |
| 英文关键词 heavy oil sodium dodecylbenzene sulfonate(SDBS) Jiaozhou Bay sediment sorption kinetics thermodynamics |
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| 中文摘要 |
| 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。 |
| 英文摘要 |
| Sorption behavior of heavy oil onto Jiaozhou Bay sediment in the presence of anionic surfactant sodium dodecylbenzene sulfonate (SDBS) in artificial seawater was studied. Batch method was used to investigate the kinetic and thermodynamic behaviors. The results showed that the sorption rate and sorption capacity increased with the increasing initial concentration of SDBS. The sorption rate equations could be described by the pseudo-second-order model. The sorption isotherms were in good agreement with the Freundlich model. Higher salinity and lower temperature of the medium were favorable to the process. In the temperature range of 283-308K, the values of thermodynamic parameters were estimated, such as the ΔGθ, ΔHθ, ΔSθ which had significantly negative values in the presence of SDBS than those without SDBS. The sorption process was a spontaneous and exothermic reaction, and the randomness was decreased during the process. |
