Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite
This study examined the adsorption capacity of natural zeolite (ZN) and zeolite treated with citric acid (ZCA) and nitric acid (ZNA) to evaluate their effectiveness in removing the pharmaceutical compound diclofenac (DCF) from water in batch experiments. Fourier Transform Infrared Spectroscopy (FTIR...
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| Format: | ARTÍCULO |
| Language: | es_ES |
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2024
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| Online Access: | http://dspace.ucuenca.edu.ec/handle/123456789/44107 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179488522&doi=10.1016%2fj.cscee.2023.100575&partnerID=40&md5=4ded20d7fa607d1e068a5a338a13a05b |
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| author | Penafiel Tenorio, Maria Eulalia Jerves Vazquez, Fanny Carola Jara Cobos, Lourdes Elizabeth Flores Zamora, Damian Vicente |
| author_facet | Penafiel Tenorio, Maria Eulalia Jerves Vazquez, Fanny Carola Jara Cobos, Lourdes Elizabeth Flores Zamora, Damian Vicente |
| author_sort | Penafiel Tenorio, Maria Eulalia |
| collection | DSpace |
| description | This study examined the adsorption capacity of natural zeolite (ZN) and zeolite treated with citric acid (ZCA) and nitric acid (ZNA) to evaluate their effectiveness in removing the pharmaceutical compound diclofenac (DCF) from water in batch experiments. Fourier Transform Infrared Spectroscopy (FTIR) and textural properties (BET) were used to investigate the changes in zeolite resulting from chemical modifications. The findings demonstrate a significant enhancement in surface area, pore volume, and the presence of acidic sites, resulting in an improved adsorption capacity for DCF. The observed increase in the Si/Al ratio following acid treatment suggests the de-alumination of the zeolite. Results have shown an increase in the percentage of DCF adsorbed to 76.8 % from 11.2 % using nitric acid-treated and untreated zeolites, respectively. In comparison, citric acid zeolite achieves 48.9 %. The adsorption kinetic was assessed using pseudo-first and pseudo-second-order models, and it was observed that the pseudo-second-order provided the best fit for all adsorbents. Furthermore, the BET model exhibited the best fit for the adsorption isotherm data. The maximum adsorption capacities were found to follow the order: ZNA (85.9 mg/g) > ZCA (33.6 mg/g) > ZN (14.4 mg/g). These results indicate that the acidic treatment enhances the adsorption capacity of the zeolite, and nitric acid treatment shows the most significant improvement. |
| format | ARTÍCULO |
| id | oai:dspace.ucuenca.edu.ec:123456789-44107 |
| institution | Universidad de Cuenca |
| language | es_ES |
| publishDate | 2024 |
| record_format | dspace |
| spelling | oai:dspace.ucuenca.edu.ec:123456789-441072024-03-06T15:06:47Z Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite Penafiel Tenorio, Maria Eulalia Jerves Vazquez, Fanny Carola Jara Cobos, Lourdes Elizabeth Flores Zamora, Damian Vicente Adsorption Zeolite Modification Diclofenac Acidic treatment This study examined the adsorption capacity of natural zeolite (ZN) and zeolite treated with citric acid (ZCA) and nitric acid (ZNA) to evaluate their effectiveness in removing the pharmaceutical compound diclofenac (DCF) from water in batch experiments. Fourier Transform Infrared Spectroscopy (FTIR) and textural properties (BET) were used to investigate the changes in zeolite resulting from chemical modifications. The findings demonstrate a significant enhancement in surface area, pore volume, and the presence of acidic sites, resulting in an improved adsorption capacity for DCF. The observed increase in the Si/Al ratio following acid treatment suggests the de-alumination of the zeolite. Results have shown an increase in the percentage of DCF adsorbed to 76.8 % from 11.2 % using nitric acid-treated and untreated zeolites, respectively. In comparison, citric acid zeolite achieves 48.9 %. The adsorption kinetic was assessed using pseudo-first and pseudo-second-order models, and it was observed that the pseudo-second-order provided the best fit for all adsorbents. Furthermore, the BET model exhibited the best fit for the adsorption isotherm data. The maximum adsorption capacities were found to follow the order: ZNA (85.9 mg/g) > ZCA (33.6 mg/g) > ZN (14.4 mg/g). These results indicate that the acidic treatment enhances the adsorption capacity of the zeolite, and nitric acid treatment shows the most significant improvement. 2024-03-06T15:06:41Z 2024-03-06T15:06:41Z 2024 ARTÍCULO 2666-0164 http://dspace.ucuenca.edu.ec/handle/123456789/44107 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179488522&doi=10.1016%2fj.cscee.2023.100575&partnerID=40&md5=4ded20d7fa607d1e068a5a338a13a05b 10.1016/j.cscee.2023.100575 es_ES application/pdf Case Studies in Chemical and Environmental Engineering |
| spellingShingle | Adsorption Zeolite Modification Diclofenac Acidic treatment Penafiel Tenorio, Maria Eulalia Jerves Vazquez, Fanny Carola Jara Cobos, Lourdes Elizabeth Flores Zamora, Damian Vicente Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite |
| title | Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite |
| title_full | Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite |
| title_fullStr | Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite |
| title_full_unstemmed | Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite |
| title_short | Enhancing adsorptive removal of diclofenac from aqueous solution: Evaluating organic and inorganic acid treatment of zeolite |
| title_sort | enhancing adsorptive removal of diclofenac from aqueous solution: evaluating organic and inorganic acid treatment of zeolite |
| topic | Adsorption Zeolite Modification Diclofenac Acidic treatment |
| url | http://dspace.ucuenca.edu.ec/handle/123456789/44107 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179488522&doi=10.1016%2fj.cscee.2023.100575&partnerID=40&md5=4ded20d7fa607d1e068a5a338a13a05b |
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