Effects of phosphate and Cr3+ on the sorption and transport of Th(IV) on a silica column

Zhang Hongxia; Yuan Jieqiong; Tao Zuyi

doi:10.1007/s10967-007-6873-0

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 273: Issue 2

Effects of phosphate and Cr³⁺ on the sorption and transport of Th(IV) on a silica column

Authors:

Zhang Hongxia

Zhang Hongxia Lanzhou University Radiochemistry Laboratory, College of Chemistry and Chemical Engineering Lanzhou 730000 P.R. China

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Yuan Jieqiong

Yuan Jieqiong Lanzhou University Radiochemistry Laboratory, College of Chemistry and Chemical Engineering Lanzhou 730000 P.R. China

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Tao Zuyi

Tao Zuyi Lanzhou University Radiochemistry Laboratory, College of Chemistry and Chemical Engineering Lanzhou 730000 P.R. China

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Pages:: 465–471

Online Publication Date:: 30 Jun 2007

Publication Date:: 01 Aug 2007

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-007-6873-0

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Abstract

Six column experiments were performed, and six breakthrough curves (BTCs) and six displacement (desorption) curves (DPCs) were obtained, which demonstrate the effects of phosphate and Cr³⁺ on the sorption and transport of Th(IV) on a silica column at pH 3.0 and Th(IV) concentration 8·10⁻⁶ mol/l of the influent. It was found that in the presence of phosphate sorbed preliminarily on the silica column, the amount of Th(IV) sorbed on the silica column is significantly increased. The breakthrough is significantly delayed relative to those in the absence of phosphate; the effect of simultaneous injection of Cr³⁺ on Th(IV) breakthrough is not significant and while the maximum concentration of Th(IV) of BTC is significantly decreased and reached about 70% of the input concentration; a minor proportion of Th(IV) sorbed on the silica column in the presence or absence of phosphate is not readily displaced with 0.01 mol/l KNO₃ aqueous solution at pH 3. Transport and sorption studies of Th(IV) are important, since all thorium isotopes are radioactive, and Th(IV) is an analogue of tetravalent actinides. There is a need to understand the potential for migration from radioactive waste storage and mill tilling sites.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)