Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag
This study presents an innovative approach to utilize coal gasification coarse slag (CGCS) for efficient and low-cost gallium extraction. Using a one-step acid leaching process, mesoporous silica with a surface area of 258 m<sup>2</sup>/g and a pore volume of 0.15 cm<sup>3</sup&...
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MDPI AG
2024-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/22/5232 |
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| author | Shiqiao Yang Guixia Fan Lukuan Ma Chao Wei Peng Li Yijun Cao Daoguang Teng |
| author_facet | Shiqiao Yang Guixia Fan Lukuan Ma Chao Wei Peng Li Yijun Cao Daoguang Teng |
| author_sort | Shiqiao Yang |
| collection | DOAJ |
| description | This study presents an innovative approach to utilize coal gasification coarse slag (CGCS) for efficient and low-cost gallium extraction. Using a one-step acid leaching process, mesoporous silica with a surface area of 258 m<sup>2</sup>/g and a pore volume of 0.15 cm<sup>3</sup>/g was synthesized. The properties of CGCS before and after acid leaching were characterized through SEM, FTIR, XRD, and BET analyses, with optimal conditions identified for maximizing specific surface area and generating saturated silanol groups. The prepared mesoporous silica demonstrated a 99% Ga(III) adsorption efficiency. Adsorption conditions were optimized, and adsorption kinetics, isotherms, and competitive adsorption behaviors were evaluated. Competitive adsorption with vanadium suggests potential application in Ga(III) extraction from vanadium-rich waste solutions. Furthermore, the recyclability of both the acid and adsorbent was explored, with the adsorbent maintaining over 85% adsorption efficiency after five cycles. The adsorption mechanism was further elucidated through SEM-EDS, XPS, and FTIR analyses. This work not only advances resource recovery from industrial waste but also offers a sustainable method for gallium extraction with industrial applications. |
| format | Article |
| id | doaj-art-cf6d8104156d4dc0bb3920a77bbac2b7 |
| institution | DOAJ |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-cf6d8104156d4dc0bb3920a77bbac2b72025-08-20T02:48:01ZengMDPI AGMolecules1420-30492024-11-012922523210.3390/molecules29225232Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification SlagShiqiao Yang0Guixia Fan1Lukuan Ma2Chao Wei3Peng Li4Yijun Cao5Daoguang Teng6School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaCollege of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaThis study presents an innovative approach to utilize coal gasification coarse slag (CGCS) for efficient and low-cost gallium extraction. Using a one-step acid leaching process, mesoporous silica with a surface area of 258 m<sup>2</sup>/g and a pore volume of 0.15 cm<sup>3</sup>/g was synthesized. The properties of CGCS before and after acid leaching were characterized through SEM, FTIR, XRD, and BET analyses, with optimal conditions identified for maximizing specific surface area and generating saturated silanol groups. The prepared mesoporous silica demonstrated a 99% Ga(III) adsorption efficiency. Adsorption conditions were optimized, and adsorption kinetics, isotherms, and competitive adsorption behaviors were evaluated. Competitive adsorption with vanadium suggests potential application in Ga(III) extraction from vanadium-rich waste solutions. Furthermore, the recyclability of both the acid and adsorbent was explored, with the adsorbent maintaining over 85% adsorption efficiency after five cycles. The adsorption mechanism was further elucidated through SEM-EDS, XPS, and FTIR analyses. This work not only advances resource recovery from industrial waste but also offers a sustainable method for gallium extraction with industrial applications.https://www.mdpi.com/1420-3049/29/22/5232CGCScyclic acid leachingsilanol-modified mesoporous silicagallium extraction |
| spellingShingle | Shiqiao Yang Guixia Fan Lukuan Ma Chao Wei Peng Li Yijun Cao Daoguang Teng Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag Molecules CGCS cyclic acid leaching silanol-modified mesoporous silica gallium extraction |
| title | Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag |
| title_full | Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag |
| title_fullStr | Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag |
| title_full_unstemmed | Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag |
| title_short | Enhanced Gallium Extraction Using Silane-Modified Mesoporous Silica Synthesized from Coal Gasification Slag |
| title_sort | enhanced gallium extraction using silane modified mesoporous silica synthesized from coal gasification slag |
| topic | CGCS cyclic acid leaching silanol-modified mesoporous silica gallium extraction |
| url | https://www.mdpi.com/1420-3049/29/22/5232 |
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