title: Activated charcoal-magnetic nanocomposite for remediation of simulated dye polluted wastewater.
abstract: Herein, we report a straightforward way to fabricate activated charcoal-magnetic nanocomposite (AC-MNC) by chemical precipitation for the sequestration of methylene blue (MB) from a simulated solution. The synthesised nanocomposite was characterised by Fourier transform infra-red (FTIR), Brunauer-Emmett-Teller (BET), transmission electron microscope (TEM) and vibrating sample magnetometer (VSM) techniques. A good uniformity in the spherical AC-MNC particles is observed from a TEM image with an average particle size diameter of around 25 nm. AC-MNC possesses a specific surface area of 387.28 m2 g(-1) with easy dispersibility and magnetic separation. The nanocomposite demonstrates an MB sequestration capacity of 147.71 mg g(-1). The high efficiency of the nanocomposite is rationalised on the basis of H-bonding and electrostatic interaction between the electropositive N-atom of MB and electronegative oxygen-containing functional groups on the composite surface. Moreover, the exhausted AC-MNC can be efficiently regenerated by microwave irradiation followed by elution with methanol. The renewed nanocomposite showed good reusability. Thus, the synthesised AC-MNC proved to be an interesting and potential material for the remediation of MB-contaminated aqueous solution.
authors.affiliation: Department of Chemistry, National Institute of Technology Silchar, Silchar, 788010, India E-mail: md_a2002@rediffmail.com.
authors.forename: Md Juned K
authors.initials: MJ
authors.lastname: Ahmed
authors.affiliation: Department of Chemistry, National Institute of Technology Silchar, Silchar, 788010, India E-mail: md_a2002@rediffmail.com.
authors.forename: M
authors.initials: M
authors.lastname: Ahmaruzzaman
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D004787:Environmental Pollution; D060328:Magnetic Phenomena; D008751:Methylene Blue; D053761:Nanocomposites / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification
chemical_list: D002606:Charcoal; D008751:Methylene Blue; D062065:Wastewater