Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 413, Issue 4, Pages 1107-1116Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-020-03074-w
Keywords
Preconcentration; Magnetic solid-phase extraction; Anoxybacillus flavithermus; Thorium; Uranium
Funding
- Mersin University Research Fund in Turkey [2018-3-AP4-3092]
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This study proposes a novel magnetized biosorbent for the preconcentration of uranium and thorium, utilizing Anoxybacillus flavithermus SO-15 immobilized on iron oxide nanoparticles. The biosorbent was found to have high biosorption capacities and was successfully applied to various water samples for preconcentrations of U(VI) and Th(IV).
This paper proposes the use of Anoxybacillus flavithermus SO-15 immobilized on iron oxide nanoparticles (NPs) as a novel magnetized biosorbent for the preconcentrations of uranium (U) and thorium (Th). The SPE procedure was based on biosorption of U(VI) and Th(IV) on a column of iron oxide NPs loaded with dead and dried thermophilic bacterial biomass prior to U(VI) and Th(IV) measurements by ICP-OES. The biosorbent characteristicswere explored using FT-IR, SEM, and EDX. Significant operational factors such as solution pH, volume and flow rate of the sample solution, amounts of dead bacteria and iron oxide nanoparticles, matrix interference effect, eluent type, and repeating use of the biosorbent on process yield were studied. The biosorption capacities were found as 62.7 and 56.4 mg g(-1) for U(VI) and Th(IV), respectively. The novel extraction process has been successfullyapplied to the tap, river, and lake water samples for preconcentrations of U(VI) and Th(IV).
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