Experimental data obtained show that oceanic and marine ferromanganese nodules and crusts are natural ion-exchangers. Exchange capacity of oceanic ferromanganese aggregates is much higher than that of shallow-water marine ones, whereas reactivities of exchange cations (Na, K, Ca, and Mg) are almost equal in both.

Supplement to: Novikov, Georgy V; Baturin, Gleb N (1997): Sorption ability of oceanic and marine ferromanganese nodules and crusts of different chemical and mineralogical composition. Translated from Okeanologiya, 1997, 37(4), 525-531, Oceanology, 37(4), 472-478