Untitled

Zakharova, K. P.; Masanov, O. L.

doi:10.1023/a:1011399408845

Cited by 13 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Radioactive waste is embedded in molten bitumen under the temperature (softening point) of up to 132 ๐ C [ 40 ]. The technique is normally used for conditioning LLW and intermediate-level radioactive waste (ILW) [ 41 , 42 ], and particularly suitable for water-soluble radioactive waste [ 40 ]. Cementation is also extensively used for immobilizing LLW and ILW [ 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Ordinary-Portland-cement solidification of Cs-137 contaminated electric arc furnace dust from steel production industry in Thailand

Yubonmhat,

Gunhakoon,

Sopapan

et al. 2024

Heliyon

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Ordinary-Portland-cement solidification of Cs-137 contaminated electric arc furnace dust from steel production industry in Thailand

Yubonmhat,

Gunhakoon,

Sopapan

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…Each of these is characterized by downsides which are too critical to be ignored. For instance, direct encapsulation in Portland cements (PC) may show low loading factors and unsatisfactory durability, while bituminization involves the use of flammable materials (Zakharova and Masanov, 2000;Pan et al, 2009). Furthermore, waste-related issues, namely swelling and flammability, related to the organic content of the waste, dispersivity and potential radionuclides leachability, have hindered, so far, the development of a proper matrix for direct confinement (Wang and Wan, 2015).…”

Section: Introductionmentioning

confidence: 99%

Design of sustainable geopolymeric matrices for encapsulation of treated radioactive solid organic waste

et al. 2022

View full text Add to dashboard Cite

Among radioactive by-products generated by nuclear technologies, solid organic waste is drawing attention because of difficult management and incompatibility with the disposal strategies traditionally adopted. Recently, geopolymers have been proposed as valid and green alternatives to cement-based matrices. In this work, novel geopolymeric formulations have been studied at laboratory scale to encapsulate ashes from incineration of surrogate solid organic waste and to further pursue sustainability and circular economy goals. Indeed, the most widely used precursor of literature geopolymers, calcined kaolin, has been totally replaced by natural raw materials and recycled industrial by-products. In addition, a highly zeolitized volcanic tuff has been chosen to further improve the intrinsic cation-exchange capacity of the geopolymer, hence enhancing waste-matrix interaction. The alkaline activation of the precursors, achieved without silicates of any metal, resulted in a promisingly durable geopolymeric matrix, whose chemical composition has been optimised to provide compressive strength above 10 MPa after 28 days of curing. A water-saturated sealed chamber provided the optimal curing condition to limit the efflorescence and improve the mechanical properties. At least 20 wt% loading of treated surrogate waste was achieved, without compromising workability, setting time, and compressive strength, the latter remaining within acceptable values. In order to demonstrate matrix durability, leaching behaviour and thermal stability were preliminarily assessed by immersion tests and thermogravimetric analyses, respectively. The leachability indices of constituent elements resulted far above 6, which is the generally agreed requirement for cement-based matrices. Moreover, the mechanical resistance was not worsened by the water immersion. The preliminarily obtained results confirm the promising properties of the new matrix for the immobilization of nuclear waste.

show abstract

Determination of alkali and alkaline earth elements in radioactive waste generated from reprocessing plant by liquid electrode plasma optical emission spectrometry

Yamamoto

Khoai

Taguchi

et al. 2020

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Untitled

Cited by 13 publications

References 4 publications

Ordinary-Portland-cement solidification of Cs-137 contaminated electric arc furnace dust from steel production industry in Thailand

Ordinary-Portland-cement solidification of Cs-137 contaminated electric arc furnace dust from steel production industry in Thailand

Design of sustainable geopolymeric matrices for encapsulation of treated radioactive solid organic waste

Determination of alkali and alkaline earth elements in radioactive waste generated from reprocessing plant by liquid electrode plasma optical emission spectrometry

Contact Info

Product

Resources

About