Highly Efficient Uptake of TcO4– by Imidazolium-Functionalized Wood Sawdust
| Autor: | Yiwei Huang, Fangfei Dong, Xupeng Zhi, Yinglin Shen, Suliang Yang, Xiaomin Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | ACS Omega ACS Omega, Vol 6, Iss 39, Pp 25672-25679 (2021) |
| ISSN: | 2470-1343 |
| Popis: | 99Tc is a radioactive fission product, mainly in the form of TcO4-, with good solubility and mobility in the environment. The development of effective and inexpensive materials to remove TcO4- from nuclear industry wastewater or contaminated water is significant. Wood sawdust is a byproduct of the wood processing industry and is an abundant, low-cost, and sustainable material. The mesostructure of wood consists of numerous hollow cells that are joined endwise to form an interconnected channel matrix capable of rapid transfer of ions. Imidazolium-functionalized wood sawdust (IM-WS) was synthesized using natural wood sawdust by a two-step reaction. It has excellent properties of TcO4-/ReO4- adsorption including rapid adsorption dynamics (30 s to equilibrium), good adsorption stability (pH 3-9), high selectivity (adsorption of 45.4 Re % in 1000 times excess of NO3- ions, 76.6 Re % in 6000 times excess of SO42- ions, and 92.2 Tc % in a simulated mixed solution; after adsorption, the concentration of TcO4- decreased to 0.056 ppb from the initial concentration of 12.09 ppb in 1000 times excess of SO42-), and in particular low production costs. These characteristics give it great prospects for low-level radioactive wastewater treatment and environmental remediation. |
| Databáze: | OpenAIRE |
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