Chemical behavior of lithium ions in reexpanded Li-montmorillonites

被引：27

作者：

Alba, MD ^{[1
]}

Alvero, R ^{[1
]}

Becerro, AI ^{[1
]}

Castro, MA ^{[1
]}

Trillo, JM ^{[1
]}

机构：

[1] Univ Seville, CSIC, Inst Ciencia Mat, Dept Quim Inorgan, E-41080 Seville, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1998年 / 102卷 / 12期

关键词：

D O I：

10.1021/jp9715641

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Chemical behavior of lithium ions in reexpanded lithium-montmorillonites has been investigated, their hydration capacity, interlamellar availability, and thermal reactivity being examined. Two experiments have been carried out: a thermal treatment to evaluate the possible recollapse of the sample, and an ionic exchange with sodium ions followed by a further thermal treatment to analyze its exchange capacity. Samples obtained have been characterized by means of XRD, FTIR, DTA/TG, and Si-29, Al-27, and Li-7 MAS NMR. A complete recollapse of the sample after the thermal treatment and an extensive ionic exchange in NaCl solution were attained. The total reversibility of the process for lithium ions has been concluded, although irreversible damage in the silicate lattice is observed.

引用

页码：2207 / 2213

页数：7

共 28 条

[1] REVERSIBLE MIGRATION OF LITHIUM IN MONTMORILLONITES [J].

ALVERO, R ;

ALBA, MD ;

CASTRO, MA ;

TRILLO, JM .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (32) :7848-7853

[2]

Brevard C., 1981, Handbook of High Resolution Multinuclear NMR

[3]

BRINDLEY GW, 1956, AM MINERAL, V41, P169

[4]

Engelhardt G., 1987, HIGH RESOLUTION SOLI

[5]

GONZALEZGARCIA F, 1949, ANAL R SOC ESP FIS B, V45, P1183

[6]

Greene-Kelly R., 1955, Mineral Mag, V30, P604, DOI [DOI 10.1180/MINMAG.1955.030.228.06, 10.1180/minmag.1955.030.228.06]

[7]

Greene-Kelly R., 1953, CLAY MIN B, V1, P52

[8] A TEST FOR MONTMORILLONITE [J].

GREENEKELLY, R .

NATURE, 1952, 170 (4339) :1130-1131

[9] Hydration mechanism of the clay mineral montmorillonite saturated with various cations [J].

Hendricks, SB ;

Nelson, RA ;

Alexander, LT .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1940, 62 :1457-1464

[10]

Hoffman U., 1950, Zeitschrift fur anorganische und allegemeine Chemie, V262, P95, DOI DOI 10.1002/ZAAC.19502620114

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