Abstract
Layered compounds based on hydrous manganese dioxide (hereafter, Mn-phases) saturated with s-metal (Ba2+), p-metal (Pb2+), and d-metal (Mn2+, Co2+, Ni2+, Cu2+, Zn2+, and Cd2+) cations, analogues of manganese minerals of oceanic ferromanganese formations (vernadite, birnessite, buserite-I, and asbolan), were prepared at 4–6°C. All Mn-phases have poorly ordered structures. The sorption properties of phase compounds were studied in relation to alkali-metal (Na+ and K+) and other s-, p-, and d-metal cations. The exchange capacities of Mn-phases for alkali cations are very low, within 0.02–0.10 mg-equiv/g; for the other cations, the exchange capacities are 0.13–4.20 mg-equiv/g. The sorption of divalent metal cations depends on the phase and chemical composition of the Mn-phase.
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