Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment
The waste acceptance criteria for heavy metals in mixed waste should be developed by reflecting the leaching behaviors that could highly depend on the repository design and environment surrounding the waste. The current standards widely used to evaluate the leaching characteristics of heavy metals w...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573323002371 |
| _version_ | 1797770065525866496 |
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| author | Yulim Lee Hyeongjin Byeon Jaeyeong Park |
| author_facet | Yulim Lee Hyeongjin Byeon Jaeyeong Park |
| author_sort | Yulim Lee |
| collection | DOAJ |
| description | The waste acceptance criteria for heavy metals in mixed waste should be developed by reflecting the leaching behaviors that could highly depend on the repository design and environment surrounding the waste. The current standards widely used to evaluate the leaching characteristics of heavy metals would not be appropriate for the silo-type repository since they are developed for landfills, which are more common than a silo-type repository. This research aimed to explore the leaching behaviors of cementitious waste with Pb, Cd, and Sb metallic and oxide powders in an environment simulating a silo-type radioactive waste repository. The Toxicity Characteristic Leaching Procedure (TCLP) and the ANS 16.1 standard were employed with standard and two modified solutions: concrete-saturated deionized and underground water. The compositions and elemental distribution of leachates and specimens were analyzed using an inductively coupled plasma optical emission spectrometer (ICP-OES) and energy-dispersive X-ray spectroscopy combined with scanning electron microscopy (SEM-EDS). Lead and antimony demonstrated high leaching levels in the modified leaching solutions, while cadmium exhibited minimal leaching behavior and remained mainly within the cement matrix. The results emphasize the significance of understanding heavy metals' leaching behavior in the repository's geochemical environment, which could accelerate or mitigate the reaction. |
| first_indexed | 2024-03-12T21:18:03Z |
| format | Article |
| id | doaj.art-a15614e46cde46088af6d53e3a62f31a |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-03-12T21:18:03Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-a15614e46cde46088af6d53e3a62f31a2023-07-29T04:34:58ZengElsevierNuclear Engineering and Technology1738-57332023-08-0155828892896Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environmentYulim Lee0Hyeongjin Byeon1Jaeyeong Park2Department of Nuclear Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan, 44919, Republic of KoreaDepartment of Nuclear Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan, 44919, Republic of KoreaCorresponding author.; Department of Nuclear Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan, 44919, Republic of KoreaThe waste acceptance criteria for heavy metals in mixed waste should be developed by reflecting the leaching behaviors that could highly depend on the repository design and environment surrounding the waste. The current standards widely used to evaluate the leaching characteristics of heavy metals would not be appropriate for the silo-type repository since they are developed for landfills, which are more common than a silo-type repository. This research aimed to explore the leaching behaviors of cementitious waste with Pb, Cd, and Sb metallic and oxide powders in an environment simulating a silo-type radioactive waste repository. The Toxicity Characteristic Leaching Procedure (TCLP) and the ANS 16.1 standard were employed with standard and two modified solutions: concrete-saturated deionized and underground water. The compositions and elemental distribution of leachates and specimens were analyzed using an inductively coupled plasma optical emission spectrometer (ICP-OES) and energy-dispersive X-ray spectroscopy combined with scanning electron microscopy (SEM-EDS). Lead and antimony demonstrated high leaching levels in the modified leaching solutions, while cadmium exhibited minimal leaching behavior and remained mainly within the cement matrix. The results emphasize the significance of understanding heavy metals' leaching behavior in the repository's geochemical environment, which could accelerate or mitigate the reaction.http://www.sciencedirect.com/science/article/pii/S1738573323002371Cementitious wasteHeavy metalLeaching testMixed wasteTCLP |
| spellingShingle | Yulim Lee Hyeongjin Byeon Jaeyeong Park Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment Nuclear Engineering and Technology Cementitious waste Heavy metal Leaching test Mixed waste TCLP |
| title | Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment |
| title_full | Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment |
| title_fullStr | Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment |
| title_full_unstemmed | Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment |
| title_short | Leachability of lead, cadmium, and antimony in cement solidified waste in a silo-type radioactive waste disposal facility environment |
| title_sort | leachability of lead cadmium and antimony in cement solidified waste in a silo type radioactive waste disposal facility environment |
| topic | Cementitious waste Heavy metal Leaching test Mixed waste TCLP |
| url | http://www.sciencedirect.com/science/article/pii/S1738573323002371 |
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