Issue 3, 2020

Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

Abstract

In this work, vanadium (V) was selectively extracted from fuel-oil fly ash using a leaching process utilizing organic acids extracted from lemon juice with assistance from ultrasound and H2O2. Response Surface Methodology (RSM) was used to optimize the main operating factors. The V recovery was 88.7% at the optimal conditions: 27.9% (v/v) lemon juice, 10% (v/v) hydrogen peroxide (H2O2), solid/liquid (S/L) ratio 0.01% (w/v), ultrasound power 159 W at 20 kHz in 2 h, and initial temperature of 35 °C. The effect of time on the V recovery was examined. The maximum recovery was 100% after 3 h. Furthermore, the individual effects of ultrasound and H2O2 on V recovery were studied, and the results showed that without H2O2 and ultrasound, the V recovery decreased greatly, indicating that both factors were essential in the leaching process. According to the modified shrinking core model, test results indicated that mass diffusion was the controlling step of the overall reaction kinetics. The activation energy of the leaching reaction in the temperature range 25 to 65 °C was found to be 17.1 kJ mol−1.

Graphical abstract: Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

Associated articles

Article information

Article type
Paper
Submitted
09 Nov 2019
Accepted
28 Dec 2019
First published
10 Jan 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 1685-1696

Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

G. Rahimi, S. O. Rastegar, F. Rahmani Chianeh and T. Gu, RSC Adv., 2020, 10, 1685 DOI: 10.1039/C9RA09325G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements