Radioactive cesium-137 removal from contaminated wastewater using bio-based activated carbon from cassava rhizomes enhanced with copper hexacyanoferrate
Abstract
) groups, which improved electrostatic interactions with positively charged Cs ions. Adsorption isotherm and kinetic analyses revealed that the Freundlich isotherm and pseudo-second-order kinetic models provided the best fit for Cs-137 uptake across all tested adsorbents. The CuHCF/CRAC(5) composite demonstrated excellent reusability, maintaining high Cs ion removal efficiencies (>97%) over five consecutive adsorption-regeneration cycles following acid washing with 0.1 M HCl. Furthermore, adsorption efficiency was notably enhanced under neutral to alkaline pH conditions. These results highlight the strong potential of CuHCF-based activated carbon composites for practical applications in radioactive wastewater treatment.
Fields of Study & Subjects
Chemical Synthesis and Characterization
Radioactive element chemistry and processing
Radioactive contamination and transfer
Publication details
- Journal / source
- RSC Advances
- Publisher
- Royal Society of Chemistry (RSC)
- Volume
- 16
- Issue
- 7
- Pages
- 6217–6232
- Publication date
- 1 January 2026
- Language
- EN