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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,...

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Autores principales: Dinh, Nga Thi, Vo, Linh Ngoc Hoang, Tran, Ngoc Thi Thanh, Phan, Tuan Dinh, Nguyen, Duc Ba
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
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.
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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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