Abstract
The first innovative model is developed in electro-dialysis reversal (EDR) desalination. First, theoretical limiting current density (LCD) determination is fitted and validated with four test-runs literature lab data. The goodness of fit and validation of LCD is statistically high with overall r 2 0.966 at p < 0.001. Second, a sensitivity analysis is done to study the most sensitive parameter in EDR with the LCD to its six modeling parameters; it was found that transport numbers of ions in membrane (t im) and in solution (t is) are rate limiting. Third, the model is constructed with emphases on LCD, concentration potential (CP), and total area of resistances of both membrane and solution to highlighting these two limiting parameters. Fourth, the model is fitted, verified, and validated with six different sets of both desalting energy and TDS in concentrate data from five literatures including 59 measured data points with five different feedwater characteristics. The values of five parameters (t Ca++, m′, ...
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