Accumulation of uranium by immobilized persimmon tannin

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399408002478· OSTI ID:5156317

Sakaguchi, Takashi; Nakajima, Akira ^[1]

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1. Miyazaki Medical College (Japan)

We have discovered that the extracted juice of unripe astringent persimmon fruit, designated as kakishibu or shibuol, has an extremely high affinity for uranium. To develop efficient adsorbents for uranium, we tried to immobilize kakishibu (persimmon tannin) with various aldehydes and mineral acids. Persimmon tannin immobilized with glutaraldehyde can accumulate 1.71 g (14 mEq U) of uranium per gram of the adsorbent. The uranium accumulating capacity of this adsorbent is several times greater than that of commercially available chelating resins (2-3 mEq/g). Immobilized persimmon tannin has the most favorable features for uranium recovery; high selective adsorption ability, rapid adsorption rate, and applicability in both column and batch systems. The uranium retained on immobilized persimmon tannin can be quantitatively and easily eluted with a very dilute acid, and the adsorbent can thus be easily recycled in the adsorption-desorption process. Immobilized persimmon tannin also has a high affinity for thorium. 23 refs., 13 figs., 7 tabs.

• OSTI ID: 5156317
• Journal Information: Separation Science and Technology; (United States), Vol. 29:2; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
THORIUM IONS
ADSORPTION
URANIUM IONS
ALDEHYDES
COMPILED DATA
TANNIC ACID
AROMATICS
CARBOXYLIC ACIDS
CHARGED PARTICLES
DATA
HYDROXY COMPOUNDS
INFORMATION
IONS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHENOLS
POLYPHENOLS
SORPTION
400105* - Separation Procedures
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials