Synthesis and sorption properties of layered hydrous manganese dioxide saturated with s-, p-, and d-metal cations |
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| Authors: | G. V. Novikov L. N. Kulikova O. Yu. Bogdanova G. I. Sychkova O. M. Dara I. G. Lugovskaya |
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| Affiliation: | (1) Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskii pr. 36, Moscow, 117851, Russia;(2) Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 117571, Russia;(3) Fedorovskii All-Russia Institute of Mineral Resources (VIMS), Staromonetnyi per. 31, Moscow, 109017, Russia |
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| 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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