期刊名称：Journal of Applied Research in Water and Wastewater
印刷版ISSN：2476-6283
电子版ISSN：2476-6283
出版年度：2021
卷号：8
期号：1
页码：41-49
DOI：10.22126/arww.2020.5153.1165
语种：English
出版社：Razi University
摘要：The purpose of this study was numerical and experimental investigations on theinfluence of ultrasound on Cr (VI) removal from aqueous solution by adsorptiononto activated carbon nanoparticles. The effect of key factors on Cr (VI) eliminationlike media pH, absorbent mass, initial concentration of Cr (VI) and the location ofultrasound transducers were considered. To perform CFD modeling of ultrasoundpropagation, the vibrations of 1.7 MHz piezoelectric transducers (PZTs) weredefined based on the dynamic mesh model. The experimental results indicated thatby pH raising from 2 to 8, Cr (VI) removal efficiency had a decreasing trend and atpH=8, it had the lowest value. The adsorption rate increased by augmentation inthe adsorbent mass (AM) due to the enhancing its specific surface area. Incomparison with using a shaker, ultrasound showed lower needed contact time forCr (VI) elimination at identical conditions. In addition, CFD results depicted that theacoustic streams were induced in the direction of ultrasound propagation, which iscaused to reach the better mixing and Cr (VI) removal efficiency. Finally, theexperimental data were adopted with the Langmuir and Freundlich isotherms. Thecomparison of these models showed that both models were well suited toexperimental findings and the data compatibility with Langmuir model was greater.
