Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery
In this study, the effect of NaOH on the synthesis of mesoporous silica (MS) by using municipal solid-waste incinerator (MSWI) ash slag was investigated. Moreover, the prepared MS was used as a support to evaluate its potential for the recovery of gold ions (Au(III)) from aqueous solution. The extra...
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2021-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/22/6894 |
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| author | Yosep Han Seongsoo Han Seongmin Kim Minuk Jung Ho-Seok Jeon Siyoung Q. Choi KyuHan Kim Youngjae Kim |
| author_facet | Yosep Han Seongsoo Han Seongmin Kim Minuk Jung Ho-Seok Jeon Siyoung Q. Choi KyuHan Kim Youngjae Kim |
| author_sort | Yosep Han |
| collection | DOAJ |
| description | In this study, the effect of NaOH on the synthesis of mesoporous silica (MS) by using municipal solid-waste incinerator (MSWI) ash slag was investigated. Moreover, the prepared MS was used as a support to evaluate its potential for the recovery of gold ions (Au(III)) from aqueous solution. The extraction process for the MSWI ash slag activated through mechanical grinding entailed alkali treatment, using varying concentrations of NaOH. The content of Si extracted from MSWI ash slag increased with the increasing grinding time and NaOH concentration. As the NaOH concentration increased, the pore structure (e.g., Brunauer–Emmett–Teller (BET) surface area and pore volume) of the synthesized MS improved. In addition, the amount of adsorbed Au(III) increased with increasing sulfur content immobilized on the support, and the sulfur content was in turn governed by the silanol content of the MS support. The adsorbent prepared by using the MS-3M support exhibited the highest Au(III) adsorption capacity (110.3 mg/g), and its adsorption–desorption efficiency was not significantly affected even after five adsorption–desorption cycles. |
| first_indexed | 2024-03-10T05:20:15Z |
| format | Article |
| id | doaj.art-f0046bba9639412ebebee55d06225ae8 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:20:15Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-f0046bba9639412ebebee55d06225ae82023-11-23T00:10:25ZengMDPI AGMaterials1996-19442021-11-011422689410.3390/ma14226894Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) RecoveryYosep Han0Seongsoo Han1Seongmin Kim2Minuk Jung3Ho-Seok Jeon4Siyoung Q. Choi5KyuHan Kim6Youngjae Kim7Resources Recovery Research Center, Mineral Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon 34132, KoreaDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, KoreaResources Recovery Research Center, Mineral Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon 34132, KoreaResources Recovery Research Center, Mineral Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon 34132, KoreaResources Recovery Research Center, Mineral Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon 34132, KoreaDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, KoreaDepartment of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, Seoul 01811, KoreaResources Recovery Research Center, Mineral Resources Division, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon 34132, KoreaIn this study, the effect of NaOH on the synthesis of mesoporous silica (MS) by using municipal solid-waste incinerator (MSWI) ash slag was investigated. Moreover, the prepared MS was used as a support to evaluate its potential for the recovery of gold ions (Au(III)) from aqueous solution. The extraction process for the MSWI ash slag activated through mechanical grinding entailed alkali treatment, using varying concentrations of NaOH. The content of Si extracted from MSWI ash slag increased with the increasing grinding time and NaOH concentration. As the NaOH concentration increased, the pore structure (e.g., Brunauer–Emmett–Teller (BET) surface area and pore volume) of the synthesized MS improved. In addition, the amount of adsorbed Au(III) increased with increasing sulfur content immobilized on the support, and the sulfur content was in turn governed by the silanol content of the MS support. The adsorbent prepared by using the MS-3M support exhibited the highest Au(III) adsorption capacity (110.3 mg/g), and its adsorption–desorption efficiency was not significantly affected even after five adsorption–desorption cycles.https://www.mdpi.com/1996-1944/14/22/6894MSWI ash slagmesoporous silicaNaOH concentrationsurface silanolgold recovery |
| spellingShingle | Yosep Han Seongsoo Han Seongmin Kim Minuk Jung Ho-Seok Jeon Siyoung Q. Choi KyuHan Kim Youngjae Kim Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery Materials MSWI ash slag mesoporous silica NaOH concentration surface silanol gold recovery |
| title | Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery |
| title_full | Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery |
| title_fullStr | Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery |
| title_full_unstemmed | Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery |
| title_short | Mesoporous Silica Derived from Municipal Solid Waste Incinerator (MSWI) Ash Slag: Synthesis, Characterization and Use as Supports for Au(III) Recovery |
| title_sort | mesoporous silica derived from municipal solid waste incinerator mswi ash slag synthesis characterization and use as supports for au iii recovery |
| topic | MSWI ash slag mesoporous silica NaOH concentration surface silanol gold recovery |
| url | https://www.mdpi.com/1996-1944/14/22/6894 |
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