Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation

The purpose of this study was numerical and experimental investigations on the influence of ultrasound on Cr (VI) removal from aqueous solution by adsorption onto activated carbon nanoparticles. The effect of key factors on Cr (VI) elimination like media pH, absorbent mass, initial concentration of...

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Autores principales:	Nazanin Niknezhad, Neda Azimi, Shahin Ahmadi
Formato:	article
Lenguaje:	EN
Publicado:	Razi University 2021
Materias:	adsorption ultrasound cfd modeling bentonite nanoparticles activated carbon sono-container Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/d390c4de5c7145c9be73489c937e4678
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spelling	oai:doaj.org-article:d390c4de5c7145c9be73489c937e46782021-11-20T12:24:01ZUltrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation2476-628310.22126/arww.2020.5153.1165https://doaj.org/article/d390c4de5c7145c9be73489c937e46782021-06-01T00:00:00Zhttps://arww.razi.ac.ir/article_1531_f8db0052b9ea6f4ac1e6d2c083b038ad.pdfhttps://doaj.org/toc/2476-6283The purpose of this study was numerical and experimental investigations on the influence of ultrasound on Cr (VI) removal from aqueous solution by adsorption onto activated carbon nanoparticles. The effect of key factors on Cr (VI) elimination like media pH, absorbent mass, initial concentration of Cr (VI) and the location of ultrasound transducers were considered. To perform CFD modeling of ultrasound propagation, the vibrations of 1.7 MHz piezoelectric transducers (PZTs) were defined based on the dynamic mesh model. The experimental results indicated that by pH raising from 2 to 8, Cr (VI) removal efficiency had a decreasing trend and at pH=8, it had the lowest value. The adsorption rate increased by augmentation in the adsorbent mass (AM) due to the enhancing its specific surface area. In comparison with using a shaker, ultrasound showed lower needed contact time for Cr (VI) elimination at identical conditions. In addition, CFD results depicted that the acoustic streams were induced in the direction of ultrasound propagation, which is caused to reach the better mixing and Cr (VI) removal efficiency. Finally, the experimental data were adopted with the Langmuir and Freundlich isotherms. The comparison of these models showed that both models were well suited to experimental findings and the data compatibility with Langmuir model was greater.Nazanin NiknezhadNeda AzimiShahin AhmadiRazi Universityarticleadsorptionultrasoundcfd modelingbentonitenanoparticlesactivated carbonsono-containerEnvironmental technology. Sanitary engineeringTD1-1066ENJournal of Applied Research in Water and Wastewater , Vol 8, Iss 1, Pp 41-49 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption ultrasound cfd modeling bentonite nanoparticles activated carbon sono-container Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption ultrasound cfd modeling bentonite nanoparticles activated carbon sono-container Environmental technology. Sanitary engineering TD1-1066 Nazanin Niknezhad Neda Azimi Shahin Ahmadi Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
description	The purpose of this study was numerical and experimental investigations on the influence of ultrasound on Cr (VI) removal from aqueous solution by adsorption onto activated carbon nanoparticles. The effect of key factors on Cr (VI) elimination like media pH, absorbent mass, initial concentration of Cr (VI) and the location of ultrasound transducers were considered. To perform CFD modeling of ultrasound propagation, the vibrations of 1.7 MHz piezoelectric transducers (PZTs) were defined based on the dynamic mesh model. The experimental results indicated that by pH raising from 2 to 8, Cr (VI) removal efficiency had a decreasing trend and at pH=8, it had the lowest value. The adsorption rate increased by augmentation in the adsorbent mass (AM) due to the enhancing its specific surface area. In comparison with using a shaker, ultrasound showed lower needed contact time for Cr (VI) elimination at identical conditions. In addition, CFD results depicted that the acoustic streams were induced in the direction of ultrasound propagation, which is caused to reach the better mixing and Cr (VI) removal efficiency. Finally, the experimental data were adopted with the Langmuir and Freundlich isotherms. The comparison of these models showed that both models were well suited to experimental findings and the data compatibility with Langmuir model was greater.
format	article
author	Nazanin Niknezhad Neda Azimi Shahin Ahmadi
author_facet	Nazanin Niknezhad Neda Azimi Shahin Ahmadi
author_sort	Nazanin Niknezhad
title	Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
title_short	Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
title_full	Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
title_fullStr	Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
title_full_unstemmed	Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
title_sort	ultrasound-assisted adsorption of cr (vi) ions from aqueous solution: experimental study and cfd simulation
publisher	Razi University
publishDate	2021
url	https://doaj.org/article/d390c4de5c7145c9be73489c937e4678
work_keys_str_mv	AT nazaninniknezhad ultrasoundassistedadsorptionofcrviionsfromaqueoussolutionexperimentalstudyandcfdsimulation AT nedaazimi ultrasoundassistedadsorptionofcrviionsfromaqueoussolutionexperimentalstudyandcfdsimulation AT shahinahmadi ultrasoundassistedadsorptionofcrviionsfromaqueoussolutionexperimentalstudyandcfdsimulation
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Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation

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