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Phosphate-functionalized magnetic calcium alginate for the engineering remediation of uranium-contaminated water and soil.
- Source :
-
Chemical Engineering Journal . Nov2023, Vol. 475, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
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Abstract
- [Display omitted] • A magnetic phosphate-functionalized calcium alginate (MPCA) was synthesized. • The mechanical strength improved after in situ magnetization and phosphorylation. • The adsorption process involves multiple adsorption mechanisms. • The excellent magnetic separation of U(VI) from eluent and soil. • An effectiveness in the engineering linked remediation of uranium contaminated soil. The increasingly hazardous and radioactive environmental issues arising from the uranium-contaminated water and soil make it urgent to develop high-yield and efficient adsorbents and the green engineering remediation technology, as well as the engineering remediation evaluation. In this work, we successfully synthesis a phosphate-functionalized magnetic calcium alginate hydrogel (MPCA) in batches by using a simple in-situ coprecipitation method. MPCA keeps maximum adsorption proportion of uranium (≥60.01 %) in the mixed multi-nuclide solution, and high adsorption capacity in different natural simulated uranium-contaminated water systems. In the engineering remediation of natural uranium-contaminated soil, MPCA removes 83.9 % of uranium and 99.8 % of radium in muddy water, even removes 92.9 % of uranium in the soil leaching wastewater. This work also validates a promising green engineering linked soil remediation technology, which combines soil leaching and adsorption separation. The remediated soil meets international emission standards, 92.9 % of uranium in the leachate is removed, 93.2 % of adsorbed uranium is desorbed and enriched. In addition, the reuse of adsorbed leachate and desorbed MPCA also minimize the consumption of engineering water and the derived radioactive water pollution. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 475
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 173233092
- Full Text :
- https://doi.org/10.1016/j.cej.2023.145910