Details

Autor(en) / Beteiligte

• Fu, Mengtao
• Ao, Junxuan
• Ma, Lin
• Kong, Dexu
• Qi, Shumao
• Zhang, Peng
• Xu, Gang
• Wu, Minghong
• Ma, Hongjuan

Titel

Uranium removal from waste water of the tailings with functional recycled plastic membrane

Ist Teil von

• Separation and purification technology, 2022-04, Vol.287, p.120572, Article 120572

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •This research can not only reduce plastic pollution but also develop new applications in uranium tailing waste water treatment.•A network of nano-holes and nanostructured particles were fabricated on the surface of the AO-membrane.•AO-membrane exhibited a remarkable uranium removal efficiency in waste water, especially at low uranium concentration.•AO-membrane could reach adsorption equilibrium within 5 h in uranium tailing waste water and present uranium removal ratio of nearly 100%.•AO-membrane exhibited long service life: the removal ratio was close to 100% after ten adsorption and desorption cycle in 100 μg/L uranium solution. Plastic pollution has become one of the most pressing environmental issues. Meanwhile, developing highly efficient adsorbents for uranium removal from the wastewater of its tailings is also of great significance in environmental protection. In this study, wastes of the plastic membrane in daily life were recycled and functionalized to treat uranium pollution in the environment. Membrane adsorbent with amidoxime (AO) group was successfully prepared using recycled plastic membranes through two-step polymerization. A network of nano-holes and nanostructured particles were observed on the surface of the AO modified membrane (AO-membrane) adsorbent. The adsorption performances from uranium solution and uranium tailings wastewater were evaluated in batch and column adsorption experiments. AO-membrane exhibited good removal performance in a wide pH range from 2 to 8. After adsorption in uranium tailings wastewater, the equilibrium concentrations of uranium in solution were lower than 50 μg/L, meeting the national standard of uranium solution discharge (50 μg/L). AO-membrane could reach adsorption equilibrium within 5 h in uranium tailings wastewater and present uranium removal ratio of nearly 100%. These indicated that this AO-membrane could be used for deep purification of wastewater, especially with low uranium concentration. AO-membrane exhibited a remarkable reuse performance and long service life. During the 10 cycles of adsorption and desorption, AO-membrane exhibited almost 100% uranium removal ratio even after ten adsorption and desorption cycles. This work provides new insights into the technology of waste control by waste.