title: Preparation, characterization and application of thiosemicarbazide grafted multiwalled carbon nanotubes for solid-phase extraction of Cd(II), Cu(II) and Pb(II) in environmental samples.
abstract: Thiosemicarbazide-grafted multi-walled carbon nanotubes were prepared and employed to investigate the pre-concentration of Cd(II), Cu(II) and Pb(II) from aqueous solution prior to their determination by ICP-OES. The resulting material was characterized by FT-IR, TGA and SEM. Various factors influencing the separation and pre-concentration were investigated. The enrichment factor typically is 60. Under optimized experimental conditions, the maximum adsorption capacities of Cd(II), Cu(II) and Pb(II) were found to be 1.98, 10.94, 3.69 mg/g, and the relative standard deviations are < 3.5% (n = 6). The new adsorbent shows superior reusability and stability. The procedure was successfully applied to the determination of trace quantities of Cd(II), Cu(II) and Pb(II) in water samples.
authors.affiliation: College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Zhangjie12_tj@163.com
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D012663:Semicarbazides / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods
chemical_list: D037742:Nanotubes, Carbon; D012663:Semicarbazides; D002104:Cadmium; D007854:Lead; C005151:thiosemicarbazide; D003300:Copper