Adsorption and immobilization of radioactive ionic-corrosion-products using magnetic hydroxyapatite and cold-sintering for nuclear waste management applications

A simple and efficient method for the adsorption and immobilization of the radioactive ionic-corrosion-products Co2+, Cr3+, Mn2+, Fe2+, Ni2+, Cu2+ and Zn2+ generated in nuclear reactor coolant has been developed using a magnetic hydroxyapatite nanocomposite (MA-HAP) and a cold-sintering technique. T...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2019-02, Vol.514, p.40-49
Main Authors: Venkatesan, Suriya, Hassan, Muhmood ul, Ryu, Ho Jin
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Carbon dioxide
Ceramic nanocomposite
Cobalt
Cold pressing
Cold sintering
Consistency tests
Copper
Corrosion
Corrosion products
Densification
Hydroxyapatite
Immobilization
Iron
Leaching
Magnetic hydroxyapatite
Magnetic properties
Manganese
Morphology
Nanocomposites
Nanoparticles
Nuclear reactors
Radioactive metal ions
Radioactive waste disposal
Radioactive wastes
Sintering
Waste immobilization
Waste management
Zeta potential
Zinc
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A simple and efficient method for the adsorption and immobilization of the radioactive ionic-corrosion-products Co2+, Cr3+, Mn2+, Fe2+, Ni2+, Cu2+ and Zn2+ generated in nuclear reactor coolant has been developed using a magnetic hydroxyapatite nanocomposite (MA-HAP) and a cold-sintering technique. The structure, morphology, magnetic properties and zeta potential of synthesized MA-HAP adsorbent were studied to evaluate its suitability for cationic uptake. The incorporated magnetic nanoparticles significantly improved the Co2+ adsorption capacity of MA-HAP to 68.95 mg/g under optimized conditions such as a pH of 6, a contact time of 120 min and an adsorbent dosage of 4 g/L. More than 92% of Co2+ was removed from the simulated aqueous solution in the presence of other ionic-corrosion-products. Densification of the nanocomposite loaded with the corrosion product was carried out using a pressure-assisted cold-sintering technique at 200 °C for 10 min. The sintered waste form showed high relative density (>95%) and hardness (>2.5 GPa). The results of a product consistency test indicated a low normalized leaching rate in the range 10−6 to 10−7 g/m2/day for all ions adsorbed by the MA-HAP. Thus, the material and methods introduced here are highly capable of adsorbing and immobilizing radioactive waste. A sustainable way to manage radioactive waste using magnetic hydroxyapatite and cold-sintering technique.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2018.11.026