Nature of Co-bearing ferromanganese crusts of the Magellan Seamounts (Pacific Ocean): Communication 2. Ion exchange properties of ore minerals

Abstract The results of experimental studies of ion exchange properties of Co-bearing ferromanganese crusts in the Magellan Seamounts (Pacific Ocean) are discussed. Maximum reactivity in reactions with the participation of manganese minerals (Fe-vernadite, vernadite) is typical of $ Na^{+} $, $ K^{+...
Ausführliche Beschreibung

Abstract The results of experimental studies of ion exchange properties of Co-bearing ferromanganese crusts in the Magellan Seamounts (Pacific Ocean) are discussed. Maximum reactivity in reactions with the participation of manganese minerals (Fe-vernadite, vernadite) is typical of $ Na^{+} $, $ K^{+} $, and $ Ca^{2+} $ cations, whereas minimum activity is recorded for cations $ Pb^{2+} $ and $ Co^{2+} $. The exchange complex of ore minerals in crusts is composed of $ Na^{+} $, $ K^{+} $, $ Ca^{2+} $, $ Mg^{2+} $, and $ Mn^{2+} $ cations. The exchange capacity of manganese minerals increases from the alkali metal cations to rare and heavy metal cations. Peculiarities of the affiliation of $ Co^{2+} $, $ Mn^{2+} $, and $ Mg^{2+} $ cations in manganese minerals of crusts are discussed. In manganese minerals, Co occurs as $ Co^{2+} $ and $ Co^{3+} $ cations. Metal cations in manganese minerals occur in different chemical forms: sorbed ($ Na^{+} $, $ K^{+} $, $ Ca^{2+} $, $ Mn^{2+} $, $ Co^{2+} $, $ Cu^{2+} $, $ Zn^{2+} $, $ Cd^{2+} $, and $ Pb^{2+} $); sorbed and chemically bound ($ Mg^{2+} $, $ Ni^{2+} $, $ Y^{3+} $, $ La^{3+} $, and $ Mo^{6+} $); and only chemically bound ($ Co^{3+} $). It is shown that the age of crust, its preservation time in the air-dry state, and type of host substrate do not affect the ion exchange indicators of manganese minerals. It has been established that alkali metal cations are characterized by completely reversible equivalent sorption, whereas heavy metal cations are sorbed by a complex mechanism: equivalent ion exchange for all metal cations; superequivalent, partly reversible sorption for $ Ba^{2+} $, $ Pb^{2+} $, $ Co^{2+} $, and $ Cu^{2+} $ cations, relative to exchange cations of manganese minerals. The obtained results refine the role of ion exchange processes during the hydrogenic formation of Co-bearing ferromanganese crusts. Ausführliche Beschreibung

Autor*in:	Novikov, G. V. [verfasserIn] Yashina, S. V. [verfasserIn] Mel’nikov, M. E. [verfasserIn] Vikent’ev, I. V. [verfasserIn] Bogdanova, O. Yu. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2014

Schlagwörter:	Metal Cation Alkali Metal Cation Crustal Layer Heavy Metal Cation Ferromanganese Crust

Übergeordnetes Werk:	Enthalten in: Lithology and mineral resources - Moscow : MAIK Nauka/Interperiodica Publ., 2000, 49(2014), 2 vom: März, Seite 138-164
Übergeordnetes Werk:	volume:49 ; year:2014 ; number:2 ; month:03 ; pages:138-164

Links:	Volltext

DOI / URN:	10.1134/S0024490214020072

Katalog-ID:	SPR01537890X