SELECTIVE EXCHANGE OF DIVALENT TRANSITION-METAL IONS IN CRYPTOMELANE-TYPE MANGANIC ACID WITH TUNNEL STRUCTURE

被引：44

作者：

TSUJI, M

KOMARNENI, S

机构：

[1] PENN STATE UNIV,DEPT AGRON,UNIV PK,PA 16802

[2] PENN STATE UNIV,MAT RES LAB,UNIV PK,PA 16802

来源：

JOURNAL OF MATERIALS RESEARCH | 1993年 / 8卷 / 03期

基金：

美国能源部;

关键词：

D O I：

10.1557/JMR.1993.0611

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ion-exchange selectivity of divalent transition metal ions on cryptomelane-type manganic acid (CMA) with tunnel structure has been studied using the distribution coefficients (K(d)) at a small fractional exchange in nitrate media. All metal ions studied showed linear relationships with a slope of -2 on the log-log plot of K(d) vs [HNO3] which clearly indicated that the adsorption process is an ''ideal'' ion-exchange. The selectivity increased in the following order: Pb much greater than Mn > Co > Cu > Hg > Cd > Zn > Ni. The high selectivity of the manganic acid was successfully utilized in the removal of Co2+ from seawater and tap water.

引用

页码：611 / 616

页数：6

共 20 条

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