title: Carboxyl-functionalized nanoparticles with magnetic core and mesopore carbon shell as adsorbents for the removal of heavy metal ions from aqueous solution.
abstract: This communication demonstrates superparamagnetic nanosized particles with a magnetic core and a porous carbon shell (thickness of 11 nm), which can remove 97% of Pb(2+) ions from an acidic aqueous solution at a Pb(2+) ion concentration of 100 mg L(-1). It is suggested that a weak electrostatic force of attraction between the heavy metal ions and the nanoparticles and the heavy metal ions adsorption on the mesopore carbon shell contribute most to the superior removal property.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Yi-Fei
authors.initials: YF
authors.lastname: Yu
authors.forename: Qian-Wang
authors.initials: QW
authors.lastname: Chen
authors.forename: Kai
authors.initials: K
authors.lastname: Cheng
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D007854:Lead / Q000737:chemistry* / Q000302:isolation & purification; D008280:Magnetics; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D007477:Ions; D014874:Water Pollutants, Chemical; D007854:Lead; D002244:Carbon