ION-EXCHANGE SELECTIVITIES OF PERIDERM AND CUTICULAR MEMBRANES TOWARD ALKALI CATIONS

被引：5

作者：

ERSOZ, M ^{[1
]}

DUNCAN, HJ ^{[1
]}

机构：

[1] UNIV GLASGOW, DEPT CHEM, AGR FOODS & ENVIRONM CHEM SECT, GLASGOW G12 8QQ, SCOTLAND

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1994年 / 29卷 / 13期

关键词：

D O I：

10.1080/01496399408002167

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The ion-exchange selectivities of lithium, sodium, potassium, and cesium on isolated potato periderm (Solanum tuberosum) and pear fruit cuticular membranes were investigated; the general order of preference both for cation selectivities and ion-exchange capacities was lithium > sodium > potassium > cesium. The potato periderm and pear fruit cuticular membranes exhibited a behavior typical of ion-exchange resins of the weak acid type. At constant pH 7, the ion-exchange capacities of periderm and cuticular membranes increased with hydrated ionic radius, and also with increasing pH and neutral salt concentration, and decreased with crystal ionic radius. Counterion selectivities also exhibited the same behavior. The ion-exchange properties are discussed in terms of the structure and function of potato periderm and pear fruit cuticular membranes.

引用

页码：1719 / 1731

页数：13

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