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Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue
The sodium salt-assisted low temperature activation of bentonite (BB) was attempted. The unique features of the raw bentonite and BB were characterized with respect to the morphological, functional, and textural analysis. The adsorptive behaviour was evaluated by adopting methylene blue (MB) as the...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8847366/ https://www.ncbi.nlm.nih.gov/pubmed/35169180 http://dx.doi.org/10.1038/s41598-022-06254-z |
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author | Shattar, Siti Fairos Ab Foo, Keng Yuen |
author_facet | Shattar, Siti Fairos Ab Foo, Keng Yuen |
author_sort | Shattar, Siti Fairos Ab |
collection | PubMed |
description | The sodium salt-assisted low temperature activation of bentonite (BB) was attempted. The unique features of the raw bentonite and BB were characterized with respect to the morphological, functional, and textural analysis. The adsorptive behaviour was evaluated by adopting methylene blue (MB) as the model pollutant via batch adsorption experiment. The experimental data were fitted to the non-linear isotherm equations (Freundlich, Langmuir, and Temkin), while the adsorption modelling was interpreted by the pseudo-first order, pseudo-second order and Elovich models. The adsorptive mechanism was ascertained according to intraparticle-diffusion and boyd models. The intercalation of sodium salt into the bentonite surface give rise to the specific surface area and total pore volume from 120.34 to 426.91, m(2)/g and 0.155 to 0.225 cm(3)/g, respectively, indicating a large proportion of the newly formed surfaces may be connected to new pore walls, associated with the silanol (≡SiOH), and aluminol (≡AlOH), and hydroxyl (–OH) groups for the possible entrapment MB onto the adsorbent. The equilibrium data was satisfactory described by the Langmuir isotherm and pseudo-second order model, with a monolayer adsorption capacity for MB of 318.38 mg/g, while the thermodynamic study verified spontaneous, feasible, and endothermic of the adsorption process. |
format | Online Article Text |
id | pubmed-8847366 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-88473662022-02-16 Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue Shattar, Siti Fairos Ab Foo, Keng Yuen Sci Rep Article The sodium salt-assisted low temperature activation of bentonite (BB) was attempted. The unique features of the raw bentonite and BB were characterized with respect to the morphological, functional, and textural analysis. The adsorptive behaviour was evaluated by adopting methylene blue (MB) as the model pollutant via batch adsorption experiment. The experimental data were fitted to the non-linear isotherm equations (Freundlich, Langmuir, and Temkin), while the adsorption modelling was interpreted by the pseudo-first order, pseudo-second order and Elovich models. The adsorptive mechanism was ascertained according to intraparticle-diffusion and boyd models. The intercalation of sodium salt into the bentonite surface give rise to the specific surface area and total pore volume from 120.34 to 426.91, m(2)/g and 0.155 to 0.225 cm(3)/g, respectively, indicating a large proportion of the newly formed surfaces may be connected to new pore walls, associated with the silanol (≡SiOH), and aluminol (≡AlOH), and hydroxyl (–OH) groups for the possible entrapment MB onto the adsorbent. The equilibrium data was satisfactory described by the Langmuir isotherm and pseudo-second order model, with a monolayer adsorption capacity for MB of 318.38 mg/g, while the thermodynamic study verified spontaneous, feasible, and endothermic of the adsorption process. Nature Publishing Group UK 2022-02-15 /pmc/articles/PMC8847366/ /pubmed/35169180 http://dx.doi.org/10.1038/s41598-022-06254-z Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Shattar, Siti Fairos Ab Foo, Keng Yuen Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
title | Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
title_full | Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
title_fullStr | Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
title_full_unstemmed | Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
title_short | Sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
title_sort | sodium salt-assisted low temperature activation of bentonite for the adsorptive removal of methylene blue |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8847366/ https://www.ncbi.nlm.nih.gov/pubmed/35169180 http://dx.doi.org/10.1038/s41598-022-06254-z |
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