title: 2,4-Dinitrophenylhydrazine functionalized sodium dodecyl sulfate-coated magnetite nanoparticles for effective removal of Cd(II) and Ni(II) ions from water samples.
abstract: 2,4-Dinitrophenylhydrazine immobilized on sodium dodecyl sulfate (SDS)-coated magnetite and was used for removal of Cd(II) and Ni(II) ions from aqueous solution. The prepared product was characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The size of the nanoparticles according to SEM was obtained around 20-35 nm. In batch tests, the effects of pH, contact time, initial metal concentration, and temperature were studied. The kinetic and equilibrium data were modeled with recently developed models. The adsorption kinetics and isotherms were well fitted by the fractal-like pseudo-second-order model and Langmuir-Freundlich model, respectively. Maximum adsorption capacity by this adsorbent is 255.1 mg g(-1) for Cd(II) ion and 319.6 mg g(-1) for Ni(II) ion at pH 7.0 and 25 °C. The method was successfully applied to the removal of metal cations in real samples (tap water, river water, and petrochemical wastewater).
authors.affiliation: Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran, s_sobhan@iauh.ac.ir.
authors.forename: Soheil
authors.initials: S
authors.lastname: Sobhanardakani
authors.forename: Raziyeh
authors.initials: R
authors.lastname: Zandipak
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D060766:Drinking Water; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D009532:Nickel / Q000737:chemistry*; D010659:Phenylhydrazines / Q000737:chemistry*; D045483:Rivers; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D002104:Cadmium; D060766:Drinking Water; D058185:Magnetite Nanoparticles; D009532:Nickel; D010659:Phenylhydrazines; D012967:Sodium Dodecyl Sulfate; D062065:Wastewater; D014874:Water Pollutants, Chemical; C004787:2,4-dinitrophenylhydrazine