Rapid vitrification of uranium-contaminated soil: Effect and mechanism

Shu, Xiaoyan; Li, Yaping; Huang, Wenxiao; Chen, Shunzhang; Xu, Chen; Zhang, Shuai; Li, Bingsheng; Wang, Xiaoqiang; Qi, Qing; Lu, Xirui

doi:10.1016/j.envpol.2020.114539

Cited by 48 publications

(24 citation statements)

References 30 publications

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“…26 The linear or bending vibration of chemical bonds was assigned to the peaks below 1600 cm −1 . 32 As can be seen in Figure 3, the sample S and N have similar types of absorption peaks. The main absorption peaks were near 474, 789, 1055, and 1630 cm −1 .…”

Section: Microstructure Analysesmentioning

confidence: 71%

“…Small absorption peaks near 1630 cm −1 were attributed to the bending vibration of hydroxyl groups, which might be due to the addition of KBr in the testing preparation process 26 . The linear or bending vibration of chemical bonds was assigned to the peaks below 1600 cm −1 32 . As can be seen in Figure 3, the sample S and N have similar types of absorption peaks.…”

Section: Resultsmentioning

confidence: 88%

“…The main absorption peaks were near 474, 789, 1055, and 1630 cm −1 . Bending vibration of Si–O–Si can be found near 474 cm −1 32 . The symmetric bending vibration of O–Si–O was near 795 cm −1 .…”

Section: Resultsmentioning

confidence: 91%

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

Wei

Shi

et al. 2021

J Am Ceram Soc

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The safe treatment of radioactive‐contaminated soil is of great significance. In this work, neodymium‐contaminated soil was successfully immobilized using microwave sintering to form glass‐ceramics. The microstructure, morphology, elemental distribution, Vickers hardness, and chemical durability of the sintered samples were analyzed. The results showed that the glass‐ceramic is more suitable to immobilize the waste compared with the glass matrix. XRD and SEM‐EDS results proved that the waste form has been totally immobilized in the sintered matrix whether in glass‐ceramics and glass. However, the leaching rate of element Nd in glass‐ceramic was lower than the glass matrix at 28 d. Moreover, the Vickers hardness results of glass‐ceramic were higher than that of glass. Thus, glass‐ceramics can not only reduce sintering temperature and save energy but also achieve a better immobilizing effect. Our investigation reflects that glass‐ceramics are more suitable for neodymium‐contaminated soil immobilization using the microwave sintering method.

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Section: Microstructure Analysesmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 88%

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

Wei

Shi

et al. 2021

J Am Ceram Soc

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“…Numerous remediation techniques are available for remediating soil contaminated with toxic metals. They include surface capping [ 10 ], encapsulation [ 11 , 12 ], landfilling, soil flushing [ 13 ], soil washing [ 14 , 15 ], electrokinetic extraction [ 16 , 17 , 18 ], stabilisation/solidification (S/S) [ 19 , 20 , 21 ], vitrification [ 22 , 23 ], phytoremediation [ 24 , 25 ] and bioremediation. Amongst these techniques, S/S has attracted the attention of many researchers due to its low-cost application whilst preserving the long-term stability of the stabilised soil [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Oyster Shell Powder, Zeolite and Red Mud as Binders for Immobilising Toxic Metals in Fine Granular Contaminated Soils (from Industrial Zones in South Korea)

Torres-Quiroz

Dissanayake

Park

2021

IJERPH

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Low-cost absorbent materials have elicited the attention of researchers as binders for the stabilisation/solidification technique. As, there is a no comprehensive study, the authors of this paper investigated the performance of Oyster shell powder (OS), zeolite (Z), and red mud (RM) in stabilising heavy metals in three types of heavy metal-contaminated soils by using toxicity characteristic leaching procedure (TCLP). Samples were collected from surroundings of an abandoned metal mine site and from military service zone. Furthermore, a Pb-contaminated soil was artificially prepared to evaluate each binder (100× regulatory level for Pb). OS bound approximately 82% of Pb and 78% of Cu in real cases scenario. While Z was highly effective in stabilizing Pb in highly polluted artificial soil (>50% of Pb) at lower dosages than OS and RM, it was not effective in stabilising those metals in the soils obtained from the contaminated sites. RM did not perform consistently stabilising toxic metals in soils from contaminated sites, but it demonstrated a remarkable Pb-immobilisation under dosages over than 5% in the artificial soil. Further, authors observed that OS removal efficiency reached up to 94% after 10 days. The results suggest that OS is the best low-cost adsorbent material to stabilize soils contaminated with toxic metals considered in the study.

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“…To explore the effective methods of remediation contaminated soils, many scientists have devoted to microwave sintering technique [11][12][13][14][15][16][17][18]. Jou [15] have reported that the Pb polluted soils are successfully immobilized by microwave sintering technique, with a low Pb leaching concentration.…”

Section: Introductionmentioning

confidence: 99%

Rapidly immobilization of simulated An3+ radioactive contaminated soil as glass-ceramics by microwave sintering

Luo

Tan

Shu

et al. 2020

Preprint

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The development of nuclear technology leads to the generation of radionuclide contaminated soils, which require efficient and rapid disposal methods. In this study, with microwave sintering method, the simulated radionuclides contaminated soils were successfully immobilized as glass-ceramics at 1200 °C with 30 min. The temperature effect, phase evolution, morphology, element distribution of simulated radioactive contaminated soil were investigated. The XRD results showed that Nd 3+ were immobilized into glass-ceramic phases with Nd 2 O 3 content increased up to 25 wt %. In addition, molecular dynamics simulation (MD) results showed the simulated radioactive contaminated soils were composed of [SiO 4 ] tetrahedron, and Si-O-Si bonds had an important effects on the glass structure forming.

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Rapid vitrification of uranium-contaminated soil: Effect and mechanism

Cited by 48 publications

References 30 publications

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

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

Oyster Shell Powder, Zeolite and Red Mud as Binders for Immobilising Toxic Metals in Fine Granular Contaminated Soils (from Industrial Zones in South Korea)

Rapidly immobilization of simulated An3+ radioactive contaminated soil as glass-ceramics by microwave sintering

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