title: Synthesis of magnetic biocomposite for efficient adsorption of azo dye from aqueous solution.
abstract: A novel magnetic biocomposite was synthesized using metal chlorides and aquatic macrophytes by co-precipitation method. The resulting product, magnetic biocomposite was characterized by Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX) and Scanning electron microscope (SEM). The adsorption performance of the magnetic biocomposite was tested with removal of Metanil Yellow dye from aqueous solution. The effect of influencing parameters such as initial dye concentration, solution pH and agitation were investigated. The equilibrium isotherm was well described by the Langmuir model with the with maximum adsorption capacity of 90.91mg/g. Adsorption kinetics experiments were carried out and the data were well fitted by a pseudo-second-order equation. The results revealed that the magnetic biocomposite could efficiently adsorb the azo dyes from aqueous solution, and the spent adsorbents could be recovered completely by magnetic separation process. Therefore, the prepared magnetic biocomposite could thus be used as promising adsorbent for the removal of azo dyes from polluted water.
authors.affiliation: Department of Chemical Engineering, National Institute of Technology Calicut, 673601, India.
authors.forename: R
authors.initials: R
authors.lastname: Sivashankar
authors.affiliation: Department of Chemical Engineering, National Institute of Technology Calicut, 673601, India.
authors.forename: A B
authors.initials: AB
authors.lastname: Sathya
authors.affiliation: Department of Chemical Engineering, National Institute of Technology Calicut, 673601, India.
authors.forename: Uma
authors.initials: U
authors.lastname: Krishnakumar
authors.affiliation: Department of Chemical Engineering, National Institute of Technology Calicut, 673601, India. Electronic address: siva@nitc.ac.in.
authors.forename: V
authors.initials: V
authors.lastname: Sivasubramanian
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry / Q000302:isolation & purification*; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D007700:Kinetics; D008280:Magnetics; D017895:Manganese Compounds / Q000737:chemistry*; D008962:Models, Theoretical; D012624:Seaweed / Q000737:chemistry*; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D005290:Ferric Compounds; D017895:Manganese Compounds; D012996:Solutions; D014874:Water Pollutants, Chemical; C551151:manganese ferrite; C005108:metanil yellow
keywords: Adsorption; Azo dyes; Magnetic biocomposites; Magnetic separation