Immobilization of radioactive corrosion products by cold sintering of pure hydroxyapatite

Efficient immobilization of ionic corrosion products by a silica-hydroxyapatite composite via a cold sintering route

“…Based on our previous studies 33,58 and current results, the reported immobilization route may be used for the solidication of radionuclides by capturing them from the liquid and gaseous wastes. The developed matrix might be used to immobilize gaseous waste (radioiodine) captured by fumed silica, silver functionalized silica or bismuth functionalized silica based gas adsorbents/lters.…”

“…1 Recently, Hassan et al reported the cold sintering of pure HAp, and cobalt sorbed HAp with good density, mechanical and chemical properties. 33 Cold sintering is a densication process of a board set of inorganic powders at extremely low temperatures up to $200 C using a uniaxial pressing. 34,35 The initial compaction is achieved by rearrangement of solid particles under mechanical force of the applied pressure.…”

Review on Selection and Experiment Method of Commonly Studied Simulated Radionuclides in Researches of Nuclear Waste Solidification

“…Some researchers studied the immobilization of 60 Co by using hydroxyapatite for 60 Co-containing nuclear waste management. Ul Hassan et al [16] studied the immobilization of Co-containing radioactive corrosion products by the cold sintering of calcium hydroxyapatite (HAp), and Co 2+ was used to simulate 60 Co. According to the previous study [108], the simulated radioactive solutions were prepared by dissolving Co(NO 3 ) 2 •6H 2 O salt in distilled water and adjusting the initial pH values of the solutions to 5.0 ± 0.1.…”

“…e common method for HLW immobilization is to form borosilicate glass or ceramic composites by vitrification or the melt process [8,13]. Many studies [14][15][16][17][18] have been conducted to investigate the immobilization characteristics, mechanism, and effectivity of various solidifying materials on nuclear waste. e main purposes of these studies are summarized as developing new solidifying materials, increasing the loading of radioactive waste, reducing the leaching of radionuclides, enhancing the mechanical strength of solidified bodies, and reducing the disposal difficulty and cost.…”

Low temperature consolidation of hydroxyapatite-reduced graphene oxide nano-structured powders

“…[52][53][54][55][56][57][58] So far, very few reports have been published on the cold sintering of hydroxyapatite containing powders. [59][60][61] In this study, hybrid nanostructured powders were synthesized using a high-pressure hydrothermal method utilizing hydrogen gas injection to increase the reduction rate of GO. To investigate the final composite properties, a cold sintering method has been used.…”