Monovalent selective electrodialysis (MSED) is a variant of conventional electrodialysis (ED) that employs selective ion exchange membranes to preferentially remove monovalent ions relative to divalent ions. This process can be beneficial when the divalent rich stream has potential applications. In agriculture, for example, a stream rich in calcium and magnesium is deemed beneficial for crops and can decrease the use of fertilizers that would otherwise need to be re-introduced to the source water prior to irrigation. MSED has been used for salt production, brine concentration, and irrigation. An experimentally validated computational model to predict its performance, however, is not available in the literature. The present work uses concepts from conventional ED modelling to build a high-resolution predictive model for the performance of MSED. The model was validated with over 32 experiments at different operating conditions and observed to fit the data to within 6% and 8% for two different types of membranes. All voltage predictions were within 10% of experiments conducted. The model was then used to predict permselectivity across different salinities and compositions. These values were extended to investigate the economic benefits of using MSED to save fertilizers for greenhouses across the U.S. Results showed an average of $4991 saved per hectare when employing MSED technology. These values aligned with predictions from two previous techno-economic studies conducted investigating MSED for agriculture.

单价选择性电渗析（MSED）是常规电渗析（ED）的一种变体，它采用选择性离子交换膜相对于二价离子优先去除一价离子。当二价浓流具有潜在应用时，该过程可能是有益的。例如，在农业中，富含钙和镁的水流被认为对农作物有益，并且可以减少肥料的使用，否则在灌溉之前需要将肥料重新引入到原水中。MSED已用于制盐，浓盐水和灌溉。但是，在文献中没有经过实验验证的预测其性能的计算模型。本工作使用常规ED建模中的概念来构建MSED性能的高分辨率预测模型。通过在不同操作条件下进行的32多次实验验证了该模型，并观察到两种不同类型的膜的数据拟合度在6％和8％之内。所有电压预测均在进行的实验的10％以内。然后，该模型用于预测不同盐度和组成下的渗透选择性。扩展了这些值，以研究在整个美国使用MSED节省化肥的经济效益。结果表明，采用MSED技术平均每公顷可节省$ 4991。这些值与之前对农业进行MSED调查的两项技术经济研究的预测一致。所有电压预测均在进行的实验的10％以内。然后，该模型用于预测不同盐度和组成下的渗透选择性。扩展了这些值，以研究在整个美国使用MSED节省化肥的经济效益。结果表明，采用MSED技术平均每公顷可节省$ 4991。这些值与之前对农业进行MSED调查的两项技术经济研究的预测一致。所有电压预测均在进行的实验的10％以内。然后，该模型用于预测不同盐度和组成下的渗透选择性。扩展了这些值，以研究在整个美国使用MSED节省化肥的经济效益。结果表明，采用MSED技术平均每公顷可节省$ 4991。这些值与之前对农业进行MSED调查的两项技术经济研究的预测一致。结果表明，采用MSED技术每公顷平均节省$ 4991。这些值与之前对农业进行MSED调查的两项技术经济研究的预测一致。结果表明，采用MSED技术每公顷平均节省$ 4991。这些值与之前对农业进行MSED调查的两项技术经济研究的预测一致。