Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels
Abstract It is a considerable challenge to selectively recycle precious metals from industrial wastewater and natural waters. Herein, carbon aerogels embedded with magnetic Fe@FeS@C nanoparticles (CFeS aerogels) were constructed from natural carrageenan. The unique redox potential of FeS, coupled wi...
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| Format: | Article |
| Language: | English |
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Wiley
2025-08-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202500858 |
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| author | Jianzheng Yang Yan Zhou Shang Du Bing Wu Jianying Zhang Shanjun Song Tao Zhou Jinming Zhang |
| author_facet | Jianzheng Yang Yan Zhou Shang Du Bing Wu Jianying Zhang Shanjun Song Tao Zhou Jinming Zhang |
| author_sort | Jianzheng Yang |
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| description | Abstract It is a considerable challenge to selectively recycle precious metals from industrial wastewater and natural waters. Herein, carbon aerogels embedded with magnetic Fe@FeS@C nanoparticles (CFeS aerogels) were constructed from natural carrageenan. The unique redox potential of FeS, coupled with the barrier effect and the electron conduction property of the carbon layer, made the Fe@FeS@C nanoparticles exhibited the ultra‐high ion selectivity. The resultant CFeS aerogels can selectively adsorb and reduce trace Au(III), Ag(I), and Pd(II) ions at ppb level in an aqueous solution with 29 coexisting cations. Even if the concentration of competing metal ions is 100‐fold higher than those of the precious metal ions, the selectivity for Au(III), Ag(I), and Pd(II) ions remained above 99.2%. Moreover, the 3D carbon network immobilizing the Fe@FeS@C nanoparticles prevented the aggregation and detachment of the recycled precious metals, thereby enhancing the adsorption rate and capacity. CFeS aerogels rapidly achieved adsorption equilibrium for Au(III), Ag(I), and Pd(II) ions in 5–10 min, and have the saturated adsorption capacities of 321.2 mg·g−1, 150.6 mg·g−1, and 70.1 mg·g−1, respectively. Such aerogels with ultra‐high selectivity, high efficiency, and easy separation provided a practical strategy for the enrichment and recovery of the precious metals. |
| format | Article |
| id | doaj-art-06cd26e7ecb6445eb88bbe763c124745 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-06cd26e7ecb6445eb88bbe763c1247452025-08-23T14:14:50ZengWileyAdvanced Science2198-38442025-08-011231n/an/a10.1002/advs.202500858Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐AerogelsJianzheng Yang0Yan Zhou1Shang Du2Bing Wu3Jianying Zhang4Shanjun Song5Tao Zhou6Jinming Zhang7National Institute of Metrology Beijing 100013 ChinaNational Institute of Metrology Beijing 100013 ChinaNational Institute of Metrology Beijing 100013 ChinaNational Institute of Metrology Beijing 100013 ChinaNational Institute of Metrology Beijing 100013 ChinaNational Institute of Metrology Beijing 100013 ChinaNational Institute of Metrology Beijing 100013 ChinaCAS Key Laboratory of Engineering Plastics Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 ChinaAbstract It is a considerable challenge to selectively recycle precious metals from industrial wastewater and natural waters. Herein, carbon aerogels embedded with magnetic Fe@FeS@C nanoparticles (CFeS aerogels) were constructed from natural carrageenan. The unique redox potential of FeS, coupled with the barrier effect and the electron conduction property of the carbon layer, made the Fe@FeS@C nanoparticles exhibited the ultra‐high ion selectivity. The resultant CFeS aerogels can selectively adsorb and reduce trace Au(III), Ag(I), and Pd(II) ions at ppb level in an aqueous solution with 29 coexisting cations. Even if the concentration of competing metal ions is 100‐fold higher than those of the precious metal ions, the selectivity for Au(III), Ag(I), and Pd(II) ions remained above 99.2%. Moreover, the 3D carbon network immobilizing the Fe@FeS@C nanoparticles prevented the aggregation and detachment of the recycled precious metals, thereby enhancing the adsorption rate and capacity. CFeS aerogels rapidly achieved adsorption equilibrium for Au(III), Ag(I), and Pd(II) ions in 5–10 min, and have the saturated adsorption capacities of 321.2 mg·g−1, 150.6 mg·g−1, and 70.1 mg·g−1, respectively. Such aerogels with ultra‐high selectivity, high efficiency, and easy separation provided a practical strategy for the enrichment and recovery of the precious metals.https://doi.org/10.1002/advs.202500858biomassprecious metalsresource recoveryselectivitywater treatment |
| spellingShingle | Jianzheng Yang Yan Zhou Shang Du Bing Wu Jianying Zhang Shanjun Song Tao Zhou Jinming Zhang Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels Advanced Science biomass precious metals resource recovery selectivity water treatment |
| title | Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels |
| title_full | Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels |
| title_fullStr | Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels |
| title_full_unstemmed | Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels |
| title_short | Superior‐Selective and Complete Recycling of Trace Precious Metals From Wastewater by Magnetic Trilayer Carbon‐Aerogels |
| title_sort | superior selective and complete recycling of trace precious metals from wastewater by magnetic trilayer carbon aerogels |
| topic | biomass precious metals resource recovery selectivity water treatment |
| url | https://doi.org/10.1002/advs.202500858 |
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