The preparation of dodecyl trimethyl ammonium bromide modified titanium dioxide for the removal of uranium.

Jian Wang, Ran Ma, Zheng Jiang

Environmental science and pollution research international 2023 Mar

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Radioactive contamination, especially the uranium pollution, is threatening the ecological environment. How to efficiently and quickly remove uranium from the environment is a problem to be solved. Herein, the dodecyl trimethyl ammonium bromide embellished titanium dioxide (DTAB/TiO2) was prepared as an adsorbent to adsorb uranium (U) from water. The introduction of dodecyl trimethyl ammonium bromide can improve the adsorption capacity of titanium dioxide for U(VI). Besides, the excellent chemical stability of DTAB/TiO2 would not result in secondary pollution, which was the novelty of this work. The DTAB/TiO2 composite was composed of nanoparticles and presented a spherical morphology with a rough surface. The radius of DTAB/TiO2 was 0.45 μm, and the specific surface area reached 144.0 m2/g. The removal of U(VI) on DTAB/TiO2 was a monolayer adsorption process, and the removal process was dependent on the solution pH. The capture of U(VI) improved with the temperature increase, indicating an endothermic process. The adsorption process can reach equilibrium within 240 min. Based on the Langmuir model, the adsorption capacity of DTAB/TiO2 for U(VI) reached 108.4 mg/g. The surface oxygen-containing functional groups, especially hydroxyl groups, played a crucial role in removing U(VI). This work can provide useful information for the cleanup of uranium and expand the application of surfactants. © 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Citation

Jian Wang, Ran Ma, Zheng Jiang. The preparation of dodecyl trimethyl ammonium bromide modified titanium dioxide for the removal of uranium. Environmental science and pollution research international. 2023 Mar;30(11):30548-30556