十二烷基苯磺酸钠──石英砂体系吸附等温线的研究

The Adsorption Isotherms of Sodium Dodecylbenzene Sulfonate on Arenaceous Quartz

用静态法和动态法（阶跃法）测定不同温度下十二烷基苯磺酸钠在石英砂上的吸附等温线。等温线属无饱和吸附量的Ｓ形，可以用作者提出的非均匀表面两阶段吸附模型描述。阶跃法测定的吸附量明显低于静态法的结果，但和脉冲－应答法的结果相一致。说明不能用静态法的测定结果代表流动状态下的吸附特性，阶跃法测定结果可作为动态吸附特性的表征。

The adsorption isotherms of NaDDBS on arenaceous quartz at several temperaratures were measured by state method and dynamic method (step-respanse technique ). The adsorption isotherms are part of S-type without maximum adsorption, and are fitted by nonuniform surface-two steps adsorption model. The adsrptions that obtained bystep-response technique are less than those obtained by state method, but agreement with the results by inpluse-responce technique. So that, the adsorption character at flow should be described by the results with dynamic technique.