G. V. Novikov, O. Yu. Bogdanova, N. V. Lobus, A. O. Rumayntseva
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引用次数: 0
Abstract
The article presents the results of experimental studies of the sorption and desorption of rare-earth metal (REM) cations by the Co-bearing ferromanganese crusts of the Govorov Guyot. It has been established that the REM cations are sorbed on the CFC ore minerals (Fe-vernadite, vernadite, Mn-feroxyhite, and goethite. The crusts are characterized by high exchange capacity (1.78–3.57 mg-equiv/g, which increases in the following series: (Dy < Gd < Lu < Sm < Nd < Y, La < Eu) \( \ll \) Ce. The REM cation sorption proceeds by the irreversible ion-exchange equivalent mechanism. The exchange complex of ore minerals consists of Na+, K+, Ca2+, and Mg2+ cations, which contribute 97‒98% to their total capacity. The crusts are characterized by the group sorption of REM cations from multicomponent water solutions of metal salts. The selectivity of manganese and ferruginous minerals of crusts to REM cations is significantly higher than to the main cations of ocean water. Experimental data on the desorption of sorbed REM cations with the NaCl solution suggest their irreversible sorption by ore minerals and strengthening of the chemical bond of sorbed REM cations with the main structural elements of these minerals over time. An important property of ore minerals, primarily manganese minerals, is their chemical and structural stability in aqueous electrolyte solutions, suggesting the repeated use of FMC as sorbents of REM cations.
摘要 本文介绍了戈沃罗夫-古约特的含钴铁锰结壳对稀土金属阳离子吸附和解吸的实验研究结果。研究证实，稀土金属阳离子被吸附在氟氯化碳矿石矿物（铁钒锰矿、钒钛铁矿、锰铁氧体矿和鹅铁矿）上。结壳的特点是高交换容量（1.78-3.57 mg-equiv/g，按以下系列递增：（Dy < Gd < Lu < Sm < Nd < Y, La < Eu）\( \ll \) Ce。REM 阳离子吸附是通过不可逆的离子交换等价机制进行的。矿石矿物的交换复合物由 Na+、K+、Ca2+ 和 Mg2+ 阳离子组成，它们占总容量的 97-98%。结壳的特点是从金属盐的多组分水溶液中群体吸附 REM 阳离子。结壳中的锰和铁锈色矿物对 REM 阳离子的选择性明显高于对海水中主要阳离子的选择性。用氯化钠溶液解吸被吸附的 REM 阳离子的实验数据表明，矿石矿物对这些阳离子的吸附是不可逆的，而且随着时间的推移，被吸附的 REM 阳离子与这些矿物的主要结构元素之间的化学键会加强。矿石矿物（主要是锰矿物）的一个重要特性是它们在水性电解质溶液中的化学和结构稳定性，这表明可以重复使用 FMC 作为 REM 阳离子的吸附剂。
期刊介绍：
Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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