Fig. 5.

Nitrate and chloride concentration increment in the regeneration reservoir as a function of number of a completed cycle. Each cycle has an (1) open circuit adsorption, (2) air flush, (3) close loop reservoir desorption, and (4) air flush. Air flush between steps was performed to reduce cross-contamination. Red squares and blue circles are nitrate and chloride concentration, respectively. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)