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Simultaneous Methylene Blue Adsorption and pH Neutralization of Contaminated Water by Rice Husk Ash
[Image: see text] In this study, the potential of rice husk ash (RHA) to act as an adsorbent for treating dye-containing wastewater was demonstrated. The RHA used in this study contained 91.7% silica, which was composed of crystalline (cristobalite and tridymite) and amorphous phases. The mechanoche...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388103/ https://www.ncbi.nlm.nih.gov/pubmed/34471764 http://dx.doi.org/10.1021/acsomega.1c02833 |
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author | Hongo, Teruhisa Moriura, Michiru Hatada, Yuji Abiko, Hironobu |
author_facet | Hongo, Teruhisa Moriura, Michiru Hatada, Yuji Abiko, Hironobu |
author_sort | Hongo, Teruhisa |
collection | PubMed |
description | [Image: see text] In this study, the potential of rice husk ash (RHA) to act as an adsorbent for treating dye-containing wastewater was demonstrated. The RHA used in this study contained 91.7% silica, which was composed of crystalline (cristobalite and tridymite) and amorphous phases. The mechanochemical treatment of RHA led to an increase in its specific surface area from 6.2 to 14.6 m(2)/g in 15 min and dramatically improved its methylene blue (MB) adsorption ability. Langmuir adsorption isotherms revealed that the maximum adsorption capacity of the treated RHA was 8.59 mg/g, which is 2.45 times higher than that of raw RHA. pH-dependent adsorption studies on the RHA revealed that MB was adsorbed on the deprotonated Q(3) silanol through electrostatic interactions. Moreover, the RHA adsorbent showed pH buffering at a pH value of approximately 7; thus, the pH of the solution could be neutralized simultaneously with the adsorptive removal of MB. |
format | Online Article Text |
id | pubmed-8388103 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-83881032021-08-31 Simultaneous Methylene Blue Adsorption and pH Neutralization of Contaminated Water by Rice Husk Ash Hongo, Teruhisa Moriura, Michiru Hatada, Yuji Abiko, Hironobu ACS Omega [Image: see text] In this study, the potential of rice husk ash (RHA) to act as an adsorbent for treating dye-containing wastewater was demonstrated. The RHA used in this study contained 91.7% silica, which was composed of crystalline (cristobalite and tridymite) and amorphous phases. The mechanochemical treatment of RHA led to an increase in its specific surface area from 6.2 to 14.6 m(2)/g in 15 min and dramatically improved its methylene blue (MB) adsorption ability. Langmuir adsorption isotherms revealed that the maximum adsorption capacity of the treated RHA was 8.59 mg/g, which is 2.45 times higher than that of raw RHA. pH-dependent adsorption studies on the RHA revealed that MB was adsorbed on the deprotonated Q(3) silanol through electrostatic interactions. Moreover, the RHA adsorbent showed pH buffering at a pH value of approximately 7; thus, the pH of the solution could be neutralized simultaneously with the adsorptive removal of MB. American Chemical Society 2021-08-16 /pmc/articles/PMC8388103/ /pubmed/34471764 http://dx.doi.org/10.1021/acsomega.1c02833 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Hongo, Teruhisa Moriura, Michiru Hatada, Yuji Abiko, Hironobu Simultaneous Methylene Blue Adsorption and pH Neutralization of Contaminated Water by Rice Husk Ash |
title | Simultaneous Methylene Blue Adsorption and pH Neutralization
of Contaminated Water by Rice Husk Ash |
title_full | Simultaneous Methylene Blue Adsorption and pH Neutralization
of Contaminated Water by Rice Husk Ash |
title_fullStr | Simultaneous Methylene Blue Adsorption and pH Neutralization
of Contaminated Water by Rice Husk Ash |
title_full_unstemmed | Simultaneous Methylene Blue Adsorption and pH Neutralization
of Contaminated Water by Rice Husk Ash |
title_short | Simultaneous Methylene Blue Adsorption and pH Neutralization
of Contaminated Water by Rice Husk Ash |
title_sort | simultaneous methylene blue adsorption and ph neutralization
of contaminated water by rice husk ash |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388103/ https://www.ncbi.nlm.nih.gov/pubmed/34471764 http://dx.doi.org/10.1021/acsomega.1c02833 |
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