Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems
Two different Brazilian fly ashes were used to selectively synthesize pure zeolites X and A by a two-step process. The zeolites were characterized in terms of mineralogical composition (XRD), morphological analysis (SEM), specific surface area (BET method), and cation exchange capacity (CEC). XRD an...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier Science Ltd
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/38776 |
| _version_ | 1848755411488866304 |
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| author | Izidoro, Juliana Fungaro, D. Abbott, Jennifer Wang, Shaobin |
| author_facet | Izidoro, Juliana Fungaro, D. Abbott, Jennifer Wang, Shaobin |
| author_sort | Izidoro, Juliana |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Two different Brazilian fly ashes were used to selectively synthesize pure zeolites X and A by a two-step process. The zeolites were characterized in terms of mineralogical composition (XRD), morphological analysis (SEM), specific surface area (BET method), and cation exchange capacity (CEC). XRD and SEM results indicated that pure zeolites X and A were obtained from fly ash samples, possessing high CEC at 3.1–3.9 meq/g. The pure zeolites X and A were used in adsorption of zinc and cadmium in single and binary systems. The adsorption studies showed that zinc is more preferentially adsorbed on pure zeolites than cadmium in both single and binary systems under similar experimental conditions. Zeolite-A presented higher adsorption than zeolite-X. The adsorption isotherms followed the Langmuir model. The adsorption capacities for zinc and cadmium on the pure zeolites ranged 156–220 mg/g and 57–195 mg/g in the single and binary ion systems, respectively. The removal of both ions by zeolites A was less affected by the presence of a competitive ion, different from zeolites X. |
| first_indexed | 2025-11-14T08:55:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-38776 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:55:53Z |
| publishDate | 2013 |
| publisher | Elsevier Science Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-387762017-02-28T01:40:01Z Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems Izidoro, Juliana Fungaro, D. Abbott, Jennifer Wang, Shaobin Metal ion removal Binary ion system Zeolite X Fly ash conversion Zeolite A Two different Brazilian fly ashes were used to selectively synthesize pure zeolites X and A by a two-step process. The zeolites were characterized in terms of mineralogical composition (XRD), morphological analysis (SEM), specific surface area (BET method), and cation exchange capacity (CEC). XRD and SEM results indicated that pure zeolites X and A were obtained from fly ash samples, possessing high CEC at 3.1–3.9 meq/g. The pure zeolites X and A were used in adsorption of zinc and cadmium in single and binary systems. The adsorption studies showed that zinc is more preferentially adsorbed on pure zeolites than cadmium in both single and binary systems under similar experimental conditions. Zeolite-A presented higher adsorption than zeolite-X. The adsorption isotherms followed the Langmuir model. The adsorption capacities for zinc and cadmium on the pure zeolites ranged 156–220 mg/g and 57–195 mg/g in the single and binary ion systems, respectively. The removal of both ions by zeolites A was less affected by the presence of a competitive ion, different from zeolites X. 2013 Journal Article http://hdl.handle.net/20.500.11937/38776 Elsevier Science Ltd restricted |
| spellingShingle | Metal ion removal Binary ion system Zeolite X Fly ash conversion Zeolite A Izidoro, Juliana Fungaro, D. Abbott, Jennifer Wang, Shaobin Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| title | Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| title_full | Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| title_fullStr | Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| title_full_unstemmed | Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| title_short | Synthesis of zeolites X and A from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| title_sort | synthesis of zeolites x and a from fly ashes for cadmium and zinc removal from aqueous solutions in single and binary ion systems |
| topic | Metal ion removal Binary ion system Zeolite X Fly ash conversion Zeolite A |
| url | http://hdl.handle.net/20.500.11937/38776 |