Rapid and efficient disposal of radioactive contaminated soil using microwave sintering method

Mechanical and leaching properties of neodymium‐contaminated soil glass‐ceramics

“…Mix the pretreated soil and Nd 2 O 3 with the weight ratio of 1: 0.03, keeping the total mass of each sample as 3.09 g. To obtain a homogenous pristine sample, the raw materials were sufficiently mixed by grinding with ethyl alcohol (AR‐grade) in a mortar. In our previous work, pure glass matrix was obtained at 1300℃ 1,15 . Thus, to investigate the difference between glass and glass‐ceramic matrix in waste immobilization, the temperatures were selected as 1300, 1250, 1200, 1150, and 1100℃ in this work, that is, adopting a temperature gradient of 50℃.…”

“…The pure soil (200 mesh, the composition of the soil is shown in Table 1) and Nd 2 O 3 powder were chosen as the reactants. 15 AR grade Nd 2 O 3 powder, which was purchased from Shanghai Aladdin Co. Ltd., China, was used to simulate An 3+ radioactive waste. 23,24 The soil was pretreated at 600°C for 6 hours to remove adsorbed water and volatile substances.…”

“…In our previous work, pure glass matrix was obtained at 1300℃. 1,15 Thus, to investigate the difference between glass and glass-ceramic matrix in waste immobilization, the temperatures were selected as 1300, 1250, 1200, 1150, and 1100℃ in this work, that is, adopting a temperature gradient of 50℃. The microwave muffle furnace (HAMiLab-M1500, Syno Therm) was used to sinter the samples.…”

“…In our previous studies, 1,15 microwave has been applied to immobilize contaminated soil to obtain a final glass matrix. Glass was a common matrix in the field of nuclear waste immobilization 16‐19 .…”

Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd2Ti2O7 Pyrochlore Matrix

“…The bioremediation method requires a long period of restoration, and the growth of plants is limited by climate and geology [9]. In addition to the above methods, vitrification is an effective technology for the immobilization of long half-life wastes, especially for soil wastes contaminated by high radioactive nuclides [10,11]. Particularly, borosilicate glass is the most widely studied and utilized vitrified waste form in the world because of its good radiation resistance, corrosion resistance, and chemical stability [12].…”