The significance of chemico-osmosis on solute transport through clay barriers exhibiting membrane behaviour was investigated by conducting coupled solute transport model simulations in which the effect of chemico-osmosis was either included or omitted. Results show that percentage reductions in solute flux (P _RF) through a clay barrier increase with increasing membrane efficiency coefficient, ω; decreasing Péclet number, P _e (representing the relative importance of advection to diffusion); and increasing osmotic number, N _π (representing the relative importance of chemico-osmosis to diffusion). Predicted P _RF values under diffusion-dominated conditions (P _e = 0·01) based on experimental data reported for bentonite barriers in contact with monovalent salt solutions (0·015 ≤ ω ≤ 0·73; 0·049 ≤ N _π ≤ 0·30) ranged from 3·8 to 74% when the effect of chemico-osmosis was omitted (i.e. by setting N _π = 0). When the effect of chemico-osmosis was included, P _RF increased by 0·5–10%, indicating that chemico-osmosis has only a minor influence on solute transport in bentonite barriers exhibiting N _π ≤ 0·30.

中文翻译：

---

化学渗透对黏土屏障中溶质运移的影响

通过进行耦合溶质输运模型模拟，研究了化学渗透对溶质通过黏土屏障表现出膜行为的溶质运移的重要性，模拟了化学渗透作用是否包括在内。结果表明，通过黏土屏障的溶质通量（P _RF）减少百分比随膜效率系数ω的增加而增加。减小佩克利数P _e（代表对流对扩散的相对重要性）；和增加渗透数，Ñ _π（表示化学-渗透到扩散的相对重要性）。在扩散主导条件下的预测P _RF值（ P _Ë = 0基于实验数据报道了在接触0膨润土障碍与单价盐溶液（·01）·015≤ ω ≤0·73 0·049≤ Ñ _π ≤0·30）从3不等·8至74 ％时省略化学-渗透的效果（即，由设置ñ _π = 0）。当包括化学-渗透的效果，P _RF增加0·5-10％，这表明化学-反渗透仅在显示出膨润土障碍溶质运输影响较小Ñ _π ≤0·30。