TY - JOUR AU - Hiep, Dang Tan AU - Hoa, Bui Thi AU - Thanh, Ngo Thi My AU - Long, Nguyen Viet AU - Phuc, Le Hong AU - Vương, Bùi Xuân PY - 2020/07/28 Y2 - 2024/03/29 TI - Isothermal models of Chromium (VI) adsorption by using Fe3O4 nanoparticles: Cr(VI) adsorption on Fe3O4 nanoparticles JF - Metallurgical and Materials Engineering JA - Metall Mater Eng VL - 27 IS - 3 SE - Nanomaterials: Synthesis, Characterization and Applications DO - 10.30544/489 UR - https://metall-mater-eng.com/index.php/home/article/view/489 SP - 289-299 AB - <p>The ferromagnetic Fe<sub>3</sub>O<sub>4</sub> 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 Fe<sub>3</sub>O<sub>4</sub> nanoparticles.</p> ER -