Effect of different synthesis methodologies on the adsorption of iodine
Radioactive nuclides such as cesium, ruthenium, and iodine are difficult to remove in radioactive wastewater, which could be removed by coprecipitation of special chemical precipitants. In this study, dynamic Cu/Ag-mordenite (Cu/Ag-MOR) material was synthesized to be treated as the precipitant to se...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023041828 |
| _version_ | 1797808416740081664 |
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| author | Guowei Yuan Yizhong Lu Cheng Yang |
| author_facet | Guowei Yuan Yizhong Lu Cheng Yang |
| author_sort | Guowei Yuan |
| collection | DOAJ |
| description | Radioactive nuclides such as cesium, ruthenium, and iodine are difficult to remove in radioactive wastewater, which could be removed by coprecipitation of special chemical precipitants. In this study, dynamic Cu/Ag-mordenite (Cu/Ag-MOR) material was synthesized to be treated as the precipitant to selectively adsorb the iodine ion (I−) through controlled chemisorption combined with physical adsorption. XRD, XPS, and FTIR characterization demonstrated the successful modification of the MOR carrier surface by Cu/Ag particles and the high selectivity of the active component Cu (I) on the dynamic Cu/Ag-MOR material. SEM, TEM, and BET methods were used to characterize the Cu/Ag-MOR material, demonstrating these results: the MOR carried a stable porous structure, which allowed the silver to be well dispersed on its surface. The silver improved the copper distribution by being well-coated by the copper species. Furthermore, the analysis of the factors influencing the chemical plating of copper showed that the pH, the concentration of EDTA-2Na and the temperature all influenced the deposition rate of Cu2O. The activation energy for Cu2O deposition in dynamic Cu/Ag-MOR was 20.31 kJ/mol. The highest removal of I− in the presence of dynamic Cu/Ag-MOR could reach 99.1% in the adsorption tests. The adsorption kinetics was under a proposed second-order model, with chemisorption being the controlling step of the reaction. The adsorption/desorption experiments demonstrated the reusability of the nano-sorbent. It was also demonstrated that dynamic Cu/Ag-MOR materials showed good applicability in complex situations where multiple pollutants co-exist. |
| first_indexed | 2024-03-13T06:37:09Z |
| format | Article |
| id | doaj.art-85acd57ed722404eb3e33da774ef45f5 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-13T06:37:09Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-85acd57ed722404eb3e33da774ef45f52023-06-09T04:28:40ZengElsevierHeliyon2405-84402023-06-0196e16975Effect of different synthesis methodologies on the adsorption of iodineGuowei Yuan0Yizhong Lu1Cheng Yang2School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, ChinaSchool of Materials Science and Engineering, University of Jinan, Jinan, 250022, ChinaSchool of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China; Corresponding author.Radioactive nuclides such as cesium, ruthenium, and iodine are difficult to remove in radioactive wastewater, which could be removed by coprecipitation of special chemical precipitants. In this study, dynamic Cu/Ag-mordenite (Cu/Ag-MOR) material was synthesized to be treated as the precipitant to selectively adsorb the iodine ion (I−) through controlled chemisorption combined with physical adsorption. XRD, XPS, and FTIR characterization demonstrated the successful modification of the MOR carrier surface by Cu/Ag particles and the high selectivity of the active component Cu (I) on the dynamic Cu/Ag-MOR material. SEM, TEM, and BET methods were used to characterize the Cu/Ag-MOR material, demonstrating these results: the MOR carried a stable porous structure, which allowed the silver to be well dispersed on its surface. The silver improved the copper distribution by being well-coated by the copper species. Furthermore, the analysis of the factors influencing the chemical plating of copper showed that the pH, the concentration of EDTA-2Na and the temperature all influenced the deposition rate of Cu2O. The activation energy for Cu2O deposition in dynamic Cu/Ag-MOR was 20.31 kJ/mol. The highest removal of I− in the presence of dynamic Cu/Ag-MOR could reach 99.1% in the adsorption tests. The adsorption kinetics was under a proposed second-order model, with chemisorption being the controlling step of the reaction. The adsorption/desorption experiments demonstrated the reusability of the nano-sorbent. It was also demonstrated that dynamic Cu/Ag-MOR materials showed good applicability in complex situations where multiple pollutants co-exist.http://www.sciencedirect.com/science/article/pii/S2405844023041828Cu2OIodine ion adsorptionDynamic chemical platingCu2O deposition RateCu/ag-MOR |
| spellingShingle | Guowei Yuan Yizhong Lu Cheng Yang Effect of different synthesis methodologies on the adsorption of iodine Heliyon Cu2O Iodine ion adsorption Dynamic chemical plating Cu2O deposition Rate Cu/ag-MOR |
| title | Effect of different synthesis methodologies on the adsorption of iodine |
| title_full | Effect of different synthesis methodologies on the adsorption of iodine |
| title_fullStr | Effect of different synthesis methodologies on the adsorption of iodine |
| title_full_unstemmed | Effect of different synthesis methodologies on the adsorption of iodine |
| title_short | Effect of different synthesis methodologies on the adsorption of iodine |
| title_sort | effect of different synthesis methodologies on the adsorption of iodine |
| topic | Cu2O Iodine ion adsorption Dynamic chemical plating Cu2O deposition Rate Cu/ag-MOR |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023041828 |
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