Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6671821 | Journal of Water Process Engineering | 2018 | 4 Pages |
Abstract
MgO was found to take up Fâ from NaF aqueous solutions due to the electrostatic attractive force between the positively charged MgO and Fâ. The Fâ adsorption by MgO can be represented by pseudo first-order reaction kinetics, and the magnitude of the apparent activation energy (71.6â¯kJ molâ1) confirms that this is a chemisorption process. The thermodynamic behavior of this process follows Langmuir-type adsorption, with the maximum adsorption amount of 5.6â¯mmol g-1. The Fâ can be desorbed from MgO using NaOH solution. The regenerated MgO can still take up Fâ from the solution despite the lowered adsorption capacity. Therefore, it is possible to recycle the MgO for Fâ adsorption.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Tomohito Kameda, Yusuke Yamamoto, Shogo Kumagai, Toshiaki Yoshioka,