Details

Autor(en) / Beteiligte

• Lv, Shao-yan
• Li, Mi
• Wu, Xiao-yan
• Zhang, Xiao-wen
• Hua, Yi-long
• Bi, Lei
• Fang, Qi
• Cai, Tao

Titel

A non-polluting method for rapidly purifying uranium-containing wastewater and efficiently recovering uranium through electrochemical mineralization and oxidative roasting

Ist Teil von

• Journal of hazardous materials, 2021-08, Vol.416, p.125885-125885, Article 125885

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• Iron-based materials have been widely used for treating uranium-containing wastewater. However, the iron-uranium solids originating by treating radioactive water through pollutant transfer methods has become a new uncontrolled source of persistent radioactive pollution. The safe disposal of such hazardous waste is not yet well-resolved. The electrochemical mineralization method was developed to rapidly purify uranium-containing wastewater through lattice doping in magnetite and recover uranium without generating any pollutants. An unexpected isolation of U3O8 from uranium-doped magnetite was discovered through in-situ XRD with a temperature variation from 300 °C to 700 °C. Through HRTEM and DFT calculation, it was confirmed that the destruction of the inverse spinel crystal structure during the gradual transformation of magnetite into γ-Fe2O3 and α-Fe2O3 promoted the migration, aggregation, and isolation of uranium atoms. Uniquely generated U3O8 and Fe2O3 were easily separated and over 80% uranium and 99.5% iron could be recovered. These results demonstrate a new strategy for uranium utilization and the environmentally friendly treatment of uranium-containing wastewater. [Display omitted] •A novel method was devised to treat radioactive wastewater and recover uranium.•The method rapidly extracts uranium via microcurrent mineralization.•Extracted uranium is separated from magnetite through crystal structure conversion.•Iron and uranium are further separated and recovered.•This will help in water purification, green synthesis, and resource regeneration.