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Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment
An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 m(2) g(−1) and 15.33 cm(3) g(−1), respectively,...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9033996/ https://www.ncbi.nlm.nih.gov/pubmed/35479923 http://dx.doi.org/10.1039/d1ra02637b |
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author | Dinh, Nga Thi Vo, Linh Ngoc Hoang Tran, Ngoc Thi Thanh Phan, Tuan Dinh Nguyen, Duc Ba |
author_facet | Dinh, Nga Thi Vo, Linh Ngoc Hoang Tran, Ngoc Thi Thanh Phan, Tuan Dinh Nguyen, Duc Ba |
author_sort | Dinh, Nga Thi |
collection | PubMed |
description | An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 m(2) g(−1) and 15.33 cm(3) g(−1), respectively, whereas the values of the original FA are negligible, i.e., 3.55 m(2) g(−1) and 0.02 cm(3) g(−1). The removal of methylene blue (MB) in aqueous solution by D-FA was increased in the range of initial MB concentration (10–20 mg L(−1)); contact time (0–120 min); pH (2–8); D-FA dosage (1–4 g L(−1)). However, a larger value of those operational parameters would not improve the removal activity. Furthermore, the methylene blue adsorption on the denatured FA was fitted with the Langmuir model with R(2) = 0.9991; the maximum adsorption capacity was determined as 28.65 mg g(−1) from the model. Overall, the highest removal efficiency of MB using D-FA with the dosage of 4 g L(−1) was 97.1% in 30 mg L(−1) solution of methylene blue at pH = 7. The alkaline hydrothermal denaturation of waste FA is a promising approach to produce an adsorbent with beneficial environmental engineering applications. |
format | Online Article Text |
id | pubmed-9033996 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90339962022-04-26 Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment Dinh, Nga Thi Vo, Linh Ngoc Hoang Tran, Ngoc Thi Thanh Phan, Tuan Dinh Nguyen, Duc Ba RSC Adv Chemistry An effective adsorbent of methylene blue was synthesized from coal fly ash (FA; waste material from a coal power plant) by a denaturing process with an alkaline solution at 90 °C. The denatured fly ash (D-FA) has a surface area and pore volume of 66.39 m(2) g(−1) and 15.33 cm(3) g(−1), respectively, whereas the values of the original FA are negligible, i.e., 3.55 m(2) g(−1) and 0.02 cm(3) g(−1). The removal of methylene blue (MB) in aqueous solution by D-FA was increased in the range of initial MB concentration (10–20 mg L(−1)); contact time (0–120 min); pH (2–8); D-FA dosage (1–4 g L(−1)). However, a larger value of those operational parameters would not improve the removal activity. Furthermore, the methylene blue adsorption on the denatured FA was fitted with the Langmuir model with R(2) = 0.9991; the maximum adsorption capacity was determined as 28.65 mg g(−1) from the model. Overall, the highest removal efficiency of MB using D-FA with the dosage of 4 g L(−1) was 97.1% in 30 mg L(−1) solution of methylene blue at pH = 7. The alkaline hydrothermal denaturation of waste FA is a promising approach to produce an adsorbent with beneficial environmental engineering applications. The Royal Society of Chemistry 2021-06-07 /pmc/articles/PMC9033996/ /pubmed/35479923 http://dx.doi.org/10.1039/d1ra02637b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Dinh, Nga Thi Vo, Linh Ngoc Hoang Tran, Ngoc Thi Thanh Phan, Tuan Dinh Nguyen, Duc Ba Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
title | Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
title_full | Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
title_fullStr | Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
title_full_unstemmed | Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
title_short | Enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
title_sort | enhancing the removal efficiency of methylene blue in water by fly ash via a modified adsorbent with alkaline thermal hydrolysis treatment |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9033996/ https://www.ncbi.nlm.nih.gov/pubmed/35479923 http://dx.doi.org/10.1039/d1ra02637b |
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