Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions
This paper focuses on the synthesis of a new silver nanocomposite adsorbent derived from rice husk as raw material. The synthesis is based on triethoxysilane chemistry and the reduction of silver without the aid of reductant chemicals. The derived AgNPs@SiO2 nanocomposites are fully characterized an...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2020-05-01
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| Series: | Comptes Rendus. Chimie |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.19/ |
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| author | Azat, Seitkhan Arkhangelsky, Elizabeth Papathanasiou, Thanasis Zorpas, Antonis A. Abirov, Askar Inglezakis, Vassilis J. |
| author_facet | Azat, Seitkhan Arkhangelsky, Elizabeth Papathanasiou, Thanasis Zorpas, Antonis A. Abirov, Askar Inglezakis, Vassilis J. |
| author_sort | Azat, Seitkhan |
| collection | DOAJ |
| description | This paper focuses on the synthesis of a new silver nanocomposite adsorbent derived from rice husk as raw material. The synthesis is based on triethoxysilane chemistry and the reduction of silver without the aid of reductant chemicals. The derived AgNPs@SiO2 nanocomposites are fully characterized and then used for the removal of mercury (II) from aqueous solutions. The results demonstrated that the affinity of the composite for mercury is high and the removal mechanism is adsorption accompanied by a redox reaction between mercury and silver followed by the formation of calomel and amalgams between silver and mercury. The silver–mercury reaction is complex, and its stoichiometry seems to scale with the silver content. Besides the importance of the surface reactions, the successful implementation of biosourced silica for mercury removal from water is useful for the development of strategies for the valorization of agricultural waste and boosts the concept of circular economy and bioeconomy. |
| first_indexed | 2024-03-11T16:15:18Z |
| format | Article |
| id | doaj.art-8d1b61abad3d49d0aa8d8f3e14e195ac |
| institution | Directory Open Access Journal |
| issn | 1878-1543 |
| language | English |
| last_indexed | 2024-03-11T16:15:18Z |
| publishDate | 2020-05-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Chimie |
| spelling | doaj.art-8d1b61abad3d49d0aa8d8f3e14e195ac2023-10-24T14:22:36ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432020-05-01231779210.5802/crchim.1910.5802/crchim.19Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutionsAzat, Seitkhan0Arkhangelsky, Elizabeth1Papathanasiou, Thanasis2Zorpas, Antonis A.3https://orcid.org/0000-0002-8154-5656Abirov, Askar4Inglezakis, Vassilis J.5Environmental Science & Technology Group (ESTg), Nazarbayev University, Astana, Kazakhstan; Al-Farabi Kazakh National University, Almaty, KazakhstanEnvironmental Science & Technology Group (ESTg), Nazarbayev University, Astana, Kazakhstan; The Environment & Resource Efficiency Cluster (EREC), Nazarbayev University, Astana, Kazakhstan; Civil and Environmental Engineering Department, School of Engineering, Nazarbayev University, Astana, KazakhstanChemical & Materials Engineering Department, School of Engineering, Nazarbayev University, Astana, KazakhstanOpen University of Cyprus, Faculty of Pure and Applied Science, Environmental Conservation and Management, Lab of Chemical Engineering and Engineering Sustainability, Nicosia, CyprusInstitute of Scientific-Technical and Economic Research, Koltobe street 4, Nur-Sultan, KazakhstanEnvironmental Science & Technology Group (ESTg), Nazarbayev University, Astana, Kazakhstan; The Environment & Resource Efficiency Cluster (EREC), Nazarbayev University, Astana, Kazakhstan; Chemical & Materials Engineering Department, School of Engineering, Nazarbayev University, Astana, KazakhstanThis paper focuses on the synthesis of a new silver nanocomposite adsorbent derived from rice husk as raw material. The synthesis is based on triethoxysilane chemistry and the reduction of silver without the aid of reductant chemicals. The derived AgNPs@SiO2 nanocomposites are fully characterized and then used for the removal of mercury (II) from aqueous solutions. The results demonstrated that the affinity of the composite for mercury is high and the removal mechanism is adsorption accompanied by a redox reaction between mercury and silver followed by the formation of calomel and amalgams between silver and mercury. The silver–mercury reaction is complex, and its stoichiometry seems to scale with the silver content. Besides the importance of the surface reactions, the successful implementation of biosourced silica for mercury removal from water is useful for the development of strategies for the valorization of agricultural waste and boosts the concept of circular economy and bioeconomy.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.19/Rice husk silicabiosourced silicasilver nanoparticlesnanocompositessilicon hydridemercuryamalgamation |
| spellingShingle | Azat, Seitkhan Arkhangelsky, Elizabeth Papathanasiou, Thanasis Zorpas, Antonis A. Abirov, Askar Inglezakis, Vassilis J. Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions Comptes Rendus. Chimie Rice husk silica biosourced silica silver nanoparticles nanocomposites silicon hydride mercury amalgamation |
| title | Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions |
| title_full | Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions |
| title_fullStr | Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions |
| title_full_unstemmed | Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions |
| title_short | Synthesis of biosourced silica–Ag nanocomposites and amalgamation reaction with mercury in aqueous solutions |
| title_sort | synthesis of biosourced silica ag nanocomposites and amalgamation reaction with mercury in aqueous solutions |
| topic | Rice husk silica biosourced silica silver nanoparticles nanocomposites silicon hydride mercury amalgamation |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.19/ |
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