Preparation of novel porous Al 2 O 3 –SiO 2 nanocomposites via solution-freeze-drying-calcination method for the efficient removal of uranium in solution
Source abstract
Abstract
Abstract In this work, the efficient extraction of uranium in solution using Al 2 O 3 –SiO 2 -T was reported. Kinetics and isotherm models indicated that the removal process of uranium on Al 2 O 3 –SiO 2 -T accorded with pseudo-second-order kinetic model and Langmuir isotherm model, which showed that the adsorption process was a uniform mono-layer chemical behavior. The maximum adsorption capacity of Al 2 O 3 –SiO 2 -T reached 738.7 mg g −1 , which was higher than AlNaO 6 Si 2 (349.8 mg g −1 ) and Al 2 O 3 –SiO 2 -NT (453.1 mg g −1 ), indicating that the addition of template could effectively improve the adsorption performance of Al 2 O 3 –SiO 2 to uranium. Even after five cycles of adsorption–desorption, the removal percentage of uranium on Al 2 O 3 –SiO 2 -T remained 96%. Besides, the extraction efficiency of uranium on Al 2 O 3 –SiO 2 -T was 72.5% in simulated seawater, which suggested that the Al 2 O 3 –SiO 2 -T was expected to be used for uranium extraction from seawater. Further, the interaction mechanism between Al 2 O 3 –SiO 2 -T and uranium species was studied. The results showed that the electrostatic interaction and complexation played key roles in the adsorption process of Al 2 O 3 –SiO 2 -T to uranium.
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Research context
OpenAlex topics: Radioactive element chemistry and processing · Nuclear materials and radiation effects · Radioactive contamination and transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (71)
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