Academic Journal
Study on the irradiation control of urease activity and its solidification of red clay to enhance radon reduction.
| Τίτλος: | Study on the irradiation control of urease activity and its solidification of red clay to enhance radon reduction. |
|---|---|
| Συγγραφείς: | Tang Y; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Liang R; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Wei J; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Sun Y; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Peng W; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Li F; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Zhang C; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China., Hong C; School of Resources, Environmental and Safety Engineering, University of South China, Hengyang 421001, China. Electronic address: hongchangshou@163.com. |
| Πηγή: | Journal of environmental radioactivity [J Environ Radioact] 2026 Feb; Vol. 293, pp. 107879. Date of Electronic Publication: 2026 Jan 06. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Elsevier Applied Science Publishers Country of Publication: England NLM ID: 8508119 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1700 (Electronic) Linking ISSN: 0265931X NLM ISO Abbreviation: J Environ Radioact Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Barking, Essex : Elsevier Applied Science Publishers |
| Ιατρικοί όροι (MeSH): | Radon*/analysis , Radon*/chemistry , Urease*/metabolism , Urease*/chemistry , Soil Pollutants, Radioactive*/analysis, Clay/chemistry ; Glycine max/enzymology ; Calcium Carbonate/chemistry |
| Περίληψη: | To address the issue of radon contamination in uranium tailings ponds, this study aimed to enhance the radon reduction performance of the enzyme-induced calcium carbonate precipitation (EICP) coating layer. This study employed uranium tailings irradiation to regulate soybean urease activity. By analyzing the irradiation effects of tailings at different burial depths and combining X-ray diffraction (XRD) with scanning electron microscopy (SEM) for multi-scale characterization, the study systematically reveals the microscopic radon reduction mechanisms. Experimental results show that the treatment with soybean urease from tailings irradiated at a depth of 3-4 m, for three days, achieved a radon reduction rate of 97 % after 28 days of curing, representing 17.1 % higher than that of traditional red clay. Microscopic structural analysis confirmed the formation of stable calcite and flocculent cementation within the material, reducing porosity and enhancing densification to effectively block radon migration pathways. The above experimental results validated the effectiveness of the irradiation-urease activity synergistic enhancement mechanism for radon reduction, providing theoretical guidance for efficient radon reduction engineering in radioactive solid waste landfills. (Copyright © 2025 Elsevier Ltd. All rights reserved.) |
| Competing Interests: | Declaration of competing interest The authors declare no competing financial interest. |
| Contributed Indexing: | Keywords: EICP; Low-dose irradiation; Microstructural mechanism; Soil-cover for radon reduction; Urease activity |
| Substance Nomenclature: | Q74S4N8N1G (Radon) EC 3.5.1.5 (Urease) T1FAD4SS2M (Clay) 0 (Soil Pollutants, Radioactive) H0G9379FGK (Calcium Carbonate) |
| Entry Date(s): | Date Created: 20260107 Date Completed: 20260625 Latest Revision: 20260625 |
| Update Code: | 20260626 |
| DOI: | 10.1016/j.jenvrad.2025.107879 |
| PMID: | 41500181 |
| Βάση Δεδομένων: | MEDLINE |
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