Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution
The present work describes the production of synthetic FAU-type zeolites, obtained from different silicon sources, and impregnated with CaCO3. The results showed that the dispersion of CaCO3 particles over the zeolite surface combined with its adsorption sites improved the performance of the adsorbe...
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Elsevier
2025-01-01
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| Series: | Next Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949822825000115 |
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| author | Daniela O. Profeta Marcella A. da Silva Diêgo N. Faria Daniel F. Cipriano Jair C.C. Freitas Fabiana Soares dos Santos Thiago M. Lima Sancler C. Vasconcelos Mendelssolm K. Pietre |
| author_facet | Daniela O. Profeta Marcella A. da Silva Diêgo N. Faria Daniel F. Cipriano Jair C.C. Freitas Fabiana Soares dos Santos Thiago M. Lima Sancler C. Vasconcelos Mendelssolm K. Pietre |
| author_sort | Daniela O. Profeta |
| collection | DOAJ |
| description | The present work describes the production of synthetic FAU-type zeolites, obtained from different silicon sources, and impregnated with CaCO3. The results showed that the dispersion of CaCO3 particles over the zeolite surface combined with its adsorption sites improved the performance of the adsorbents for Cd2 + removal in aqueous solution when compared to pristine zeolites. The commercial beta zeolite sample, used as a reference, revealed unsatisfactory performance on Cd2+ uptake since both the Al and Ca contents were lower than those found in the synthetic FAU-type zeolites. Adsorption tests, associated with kinetic studies and adsorption isotherms, revealed that chemisorption, especially ion exchange, with monolayer formation at the zeolite surface, was the main mechanism involved in the Cd2+ uptake process. These results showed then that it is necessary to impregnate the samples with CaCO3, since the Cd2+ removal efficiency is raised for all samples, possibly due to the synergistic contribution of the adsorption sites present in both the zeolite and the CaCO3 particles. Furthermore, the FAU-type zeolite sample with a larger crystal size or larger particle aggregate showed greater capacity to disperse the CaCO3 on its surface, enhancing the Cd2+ uptake. |
| format | Article |
| id | doaj-art-5c255b7ce2ee46c3b0f958c32881edbc |
| institution | DOAJ |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Materials |
| spelling | doaj-art-5c255b7ce2ee46c3b0f958c32881edbc2025-08-20T03:16:35ZengElsevierNext Materials2949-82282025-01-01610049310.1016/j.nxmate.2025.100493Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solutionDaniela O. Profeta0Marcella A. da Silva1Diêgo N. Faria2Daniel F. Cipriano3Jair C.C. Freitas4Fabiana Soares dos Santos5Thiago M. Lima6Sancler C. Vasconcelos7Mendelssolm K. Pietre8Fluminense Federal University. Department of Chemistry -ICEx, Volta Redonda, RJ, BrazilFluminense Federal University. Department of Chemistry -ICEx, Volta Redonda, RJ, BrazilLaboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo, Vitória, ES, Brazil; Laboratory of Chemical Sciences, State University of the Northern Rio de Janeiro UENF, Av. Alberto Lamego, 2000, Campos dos Goytacazes, BrazilLaboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo, Vitória, ES, BrazilLaboratory of Carbon and Ceramic Materials, Department of Physics, Federal University of Espírito Santo, Vitória, ES, BrazilFluminense Federal University. Department of Agribusiness Engineering, Volta Redonda, RJ, BrazilFluminense Federal University Institute of Chemistry, Valonguinho, Niterói, Rio de Janeiro, BrazilFluminense Federal University Institute of Chemistry, Valonguinho, Niterói, Rio de Janeiro, BrazilFluminense Federal University. Department of Chemistry -ICEx, Volta Redonda, RJ, Brazil; Corresponding author.The present work describes the production of synthetic FAU-type zeolites, obtained from different silicon sources, and impregnated with CaCO3. The results showed that the dispersion of CaCO3 particles over the zeolite surface combined with its adsorption sites improved the performance of the adsorbents for Cd2 + removal in aqueous solution when compared to pristine zeolites. The commercial beta zeolite sample, used as a reference, revealed unsatisfactory performance on Cd2+ uptake since both the Al and Ca contents were lower than those found in the synthetic FAU-type zeolites. Adsorption tests, associated with kinetic studies and adsorption isotherms, revealed that chemisorption, especially ion exchange, with monolayer formation at the zeolite surface, was the main mechanism involved in the Cd2+ uptake process. These results showed then that it is necessary to impregnate the samples with CaCO3, since the Cd2+ removal efficiency is raised for all samples, possibly due to the synergistic contribution of the adsorption sites present in both the zeolite and the CaCO3 particles. Furthermore, the FAU-type zeolite sample with a larger crystal size or larger particle aggregate showed greater capacity to disperse the CaCO3 on its surface, enhancing the Cd2+ uptake.http://www.sciencedirect.com/science/article/pii/S2949822825000115FaujasiteCaCO3 impregnationBeta zeoliteCadmium removal |
| spellingShingle | Daniela O. Profeta Marcella A. da Silva Diêgo N. Faria Daniel F. Cipriano Jair C.C. Freitas Fabiana Soares dos Santos Thiago M. Lima Sancler C. Vasconcelos Mendelssolm K. Pietre Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution Next Materials Faujasite CaCO3 impregnation Beta zeolite Cadmium removal |
| title | Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution |
| title_full | Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution |
| title_fullStr | Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution |
| title_full_unstemmed | Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution |
| title_short | Zeolite/calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution |
| title_sort | zeolite calcium carbonate composite for a synergistic adsorption of cadmium in aqueous solution |
| topic | Faujasite CaCO3 impregnation Beta zeolite Cadmium removal |
| url | http://www.sciencedirect.com/science/article/pii/S2949822825000115 |
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