title: Synthesis of magnetic oxidized multiwalled carbon nanotube-κ-carrageenan-Fe3O4 nanocomposite adsorbent and its application in cationic Methylene Blue dye adsorption.
abstract: In this study, magnetic oxidized multiwalled carbon nanotube (OMWCNT)-Fe3O4 and OMWCNT-κ-carrageenan-Fe3O4 nanocomposites were synthesized and used as adsorbent for the removal of Methylene Blue (MB) from aqueous solution. Magnetic nanocomposites were characterized by using of specific surface area, Fourier transform infrared, X-ray diffraction, vibrating sample magnetometry, thermal gravimetric analysis, scanning electron microscope and transmission electron microscope measurements. The results of characterization analyses exhibited that OMWCNT was successfully modified with κ-carrageenan. Furthermore, OMWCNT-Fe3O4 and OMWCNT-κ-carrageenan-Fe3O4 nanocomposites were of a super-paramagnetic property. Adsorption studies revealed that the data of adsorption kinetics and isotherm were well fitted by the pseudo second-order kinetic model and Langmuir isotherm model, respectively. The adsorption amounts of magnetic adsorbents increased with contact time and initial dye concentration. Compared with magnetic OMWCNT-Fe3O4 nanocomposite, magnetic OMWCNT-κ-carrageenan-Fe3O4 nanocomposite showed a better adsorption performance for the removal of MB from aqueous solution. Therefore, OMWCNT-κ-carrageenan-Fe3O4 nanocomposite may be used as a magnetic adsorbent to remove the cationic dyes from wastewaters.
authors.affiliation: Akdeniz University, Faculty of Science, Department of Chemistry, 07058, Antalya, Turkey. Electronic address: osmanduman@akdeniz.edu.tr.
authors.forename: Osman
authors.initials: O
authors.lastname: Duman
authors.affiliation: Akdeniz University, Faculty of Science, Department of Chemistry, 07058, Antalya, Turkey. Electronic address: stunc@akdeniz.edu.tr.
authors.forename: Sibel
authors.initials: S
authors.lastname: Tunç
authors.affiliation: Akdeniz University, Faculty of Science, Department of Chemistry, 07058, Antalya, Turkey.
authors.forename: Tülin Gürkan
authors.initials: TG
authors.lastname: Polat
authors.affiliation: Akdeniz University, Faculty of Science, Department of Chemistry, 07058, Antalya, Turkey.
authors.forename: Bahar Kancı
authors.initials: BK
authors.lastname: Bozoğlan
mesh_terms: D000327:Adsorption; D002351:Carrageenan / Q000737:chemistry*; D005296:Ferrous Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry / Q000302:isolation & purification*; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D005296:Ferrous Compounds; D037742:Nanotubes, Carbon; D002351:Carrageenan; C034236:ferrous oxide; D008751:Methylene Blue
keywords: Adsorption; Magnetic nanocomposite; Methylene Blue; Multiwalled carbon nanotube; κ-Carrageenan