Isothermal models of Chromium (VI) adsorption by using Fe3O4 nanoparticles

• Main Authors: Dang Tan Hiep, Bui Thi Hoa, Ngo Thi My Thanh, Nguyen Viet Long, Le Hong Phuc, Bùi Xuân Vương
• Format: Article
• Language: English
• Published: Association of Metallurgical Engineers of Serbia 2020-07-01
• Series: Metallurgical & Materials Engineering
• Subjects: fe3o4 ferromagnetic nanoparticles, adsorption, cr(vi), equilibrium, redlich-peterson.
• Online Access: https://metall-mater-eng.com/index.php/home/article/view/489

The ferromagnetic Fe3O4 nanoparticles with the average particle size of about 10 nm were used to adsorb chromium (VI) in aqueous solution. The equilibrium of Cr(VI) adsorption can be achieved at the pH value of 2.5, in the contact time of 120 minutes. The mechanisms of Cr(VI) adsorption were evaluated by 4 isothermal adsorption models Langmuir, Freundlich, Redlich-Peterson, and Temkin. The results showed that all four models are satisfied; especially, Redlich-Peterson is the most suitable model to describe the adsorption kinetic of Cr(VI) on ferromagnetic Fe3O4 nanoparticles.