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. 2021 Sep 30;118(40):e2108240118. doi: 10.1073/pnas.2108240118

Fig. 1.

Fig. 1.

Schematic demonstrating boron removal by a CDI cell. (A) Boron is pH-dependent in water and plotted is the molar fraction of the various boron-containing species as a function of water pH. (B) A CDI cell with an anode placed upstream and a snapshot of the developed pH profile within the electrodes. (C) A snapshot of ion and charge distributions near the anode/separator interface, showing boric acid dissociation and electrosorption.