Functionalized magnetic mesoporous palm shell activated carbon for enhanced removal of azo dyes. Issue 5 (October 2020)

• Record Type: Journal Article
• Authors: Kittappa, Shanmuga; Jais, Farahin Mohd; Ramalingam, Malarvili; Mohd, Nuruol Syuhadaa; Ibrahim, Shaliza
• Is Part Of: Journal of environmental chemical engineering. Volume 8:Issue 5(2020)
• Publication Date: 2020-10
• Subjects: Adsorbent -- Magnetized Palm shell activated carbon -- Dyes -- Methylene blue -- Methyl Orange -- Congo red; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2020.104081
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Highlights: MMPAC was synthesized using palm shell activated carbon, nano magnetite, silica and magnesium oxide. MMPAC was successfully adsorbed three different types of Azo dyes. MMPAC can be separated using magnet, regenerated and reused again multiple times for adsorption. Kinetic results and thermodynamic parameters stipulated a physio-sorption mechanism for removal of dyes. Abstract: A novel adsorbent magnesium and silica coated magnetized palm shell activated carbon (MMPAC) was synthesized via hydrothermal process. MMPAC exhibited high adsorption capacity of 369.54 mg L −1 for methylene blue, 528.98 mg L −1 for methyl orange and 257.25 mg L −1 for congo red. MMPAC removed single, double and multiple dyes effectively and the experimental results matched Langmuir isotherm and pseudo second order kinetic models. MMPAC was regenerated and recycled four times using simple technique with no significant drop observed in the adsorption capacity. Thermodynamic parameters revealed that the adsorption is endothermic and spontaneous at room temperature. Pseudo second order kinetic model parameters and intraparticles diffusion of dyes implied that the dominating adsorption mechanism was physical in nature.