TABLE 2 Experimental Results Capacity Capacity/Initial Example Exchanged (mEq) Mass (mEq/g) 1 436 0.97 2 506 0.97 3 425 0.80 4 478 0.89 This written description sets forth the best mode of the invention, and describes the invention so as to enable a person skilled in the art to make and use the invention, by presenting examples of the elements recited in the claims.