Ion-exchange selectivities of periderm and cuticular membranes toward alkali cations

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399408002167· OSTI ID:35562

Ersoz, M ^[1]; Duncan, H J ^[2]

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1. Univ. of Selcuk, Konya (Turkey)
2. Univ. of Glasgow, Scotland (United Kingdom)

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.

• Sponsoring Organization: USDOE
• OSTI ID: 35562
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 13 Vol. 29; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
ABSORPTION
CESIUM
FOLIAR UPTAKE
ION EXCHANGE
ION EXCHANGE MATERIALS
LITHIUM
MEMBRANES
PERFORMANCE
PESTICIDES
PLANT TISSUES
POTASSIUM
SODIUM