Membrane efficiency model of clay under multiionic conditions

The membrane efficiency coefficient is a critical theoretical indicator used to assess the performance of clay barriers in landfills. At present, the membrane efficiency coefficient is determined in response to a single ion, which cannot be used to accurately evaluate the performance of clay barriers under multiionic leachates. Therefore, a membrane efficiency model must be developed considering multiionic conditions. In this study, a membrane efficiency model of clay under multiionic conditions is established based on the mineral-pore fluid interactions and triple-layer model. The proposed model is validated by comparing the predicted and measured results of the variation in membrane efficiency coefficients with mixing ratios under multiionic conditions. Results indicate the proposed model accurately determines the membrane efficiency of clay under multiionic conditions. The predicted membrane efficiency coefficient decreases with increasing solution concentration and void ratio due to the weakened mineral-pore fluid interaction. The proposed membrane efficiency model can provide a more accurate theoretical tool to assess the performance of clay barriers.

Automated summary

In this study, a membrane efficiency model of clay under multiionic conditions is proposed, which is based on the mineral-pore fluid interactions and triple-layer model. The model is validated by comparing the predicted and measured results, showing accurate determination of membrane efficiency. The proposed model can provide a more accurate theoretical tool to assess the performance of clay barriers.