Salt Rejection by a Porous Glass

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Science  14 Jan 1966:
Vol. 151, Issue 3707, pp. 194-195
DOI: 10.1126/science.151.3707.194


Porous glass partly filters dissolved salt from aqueous solutions passed through it under pressure. Rejection of salt can be increased by increase in the pH of the solution or by addition of Th(IV). The filtration seems to accord with a mechanism of salt exclusion characteristic of ion exchangers.