Sequential ultrasonic leaching of strontium from sediments

Authors
Citation
A. Elik et M. Akcay, Sequential ultrasonic leaching of strontium from sediments, INT J ENV A, 80(4), 2001, pp. 257-267
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
ISSN journal
0306-7319 → ACNP
Volume
80
Issue
4
Year of publication
2001
Pages
257 - 267
Database
ISI
SICI code
0306-7319(2001)80:4<257:SULOSF>2.0.ZU;2-V
Abstract
The effects of ultrasonic excitation on the sequential leaching of Sr from sediments have been investigated. The sequential leaching scheme of Tessier partitions metals in sediments into exchangeable, carbonate bound, oxide b ound, organic bound, and residual binding fractions. The Sr in the leachate s was determined by flame atomic absorption spectrometry. Leaching rate exp eriments using conventional and ultrasonic leaching showed that the ultraso nic leaching method (ULM) produces comparable results to the conventional p rocedure. In addition, this method reduces the time required for Tessier fr actionation from 21 h to 1.7 h. Sequential ultrasonic leaching procedures w ere established as a result of the extraction rate experiments. The precision obtained from 21 replicate ULM yielded an average relative st andard deviation % of 9.2, 10.3, 11.7, 8.6, and 12.8 for exchangeable, carb onate, oxide, organic, and residual fractions, respectively. The precision variance between the means of the two leaching methods was not significant at 0.05 probability for Sr. The recoveries of total Sr using NIES CRM-2 ran ged from 75 % to 101 % for the conventional procedure and 84 % to 109 % for the ULM.