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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.
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. By means of FT-IR, TGA and SEM. Various factors influencing the separation and pre-concentration were investigated. The enrichment factor is typically 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 traceable quantities. of Cd (Ⅱ), Cu (Ⅱ) and Pb (Ⅱ) in water samples.