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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.

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.

Journal of environmental sciences (China) (2014-02-21)

Jie Zhang

ZUSAMMENFASSUNG

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.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

Sigma-Aldrich

Thiosemicarbazid, 99%

Sigma-Aldrich

Kupfer, powder, <425 μm, 99.5% trace metals basis

Sigma-Aldrich

Kupfer, foil, thickness 0.25 mm, 99.98% trace metals basis

Sigma-Aldrich

Kupfer, powder, 99.99% trace metals basis

Sigma-Aldrich

Blei, powder, −100 mesh, 99.95% trace metals basis

Sigma-Aldrich

Kupfer, powder, <75 μm, 99%

Sigma-Aldrich

Kupfer, wire, diam. 1.0 mm, ≥99.9%

Sigma-Aldrich

Cadmium, granular, 30-80 mesh, ≥99%

Sigma-Aldrich

Cadmium, powder, −100 mesh, 99.5% trace metals basis

Sigma-Aldrich

Kupfer, nanopowder, 40-60 nm particle size (SAXS), ≥99.5% trace metals basis

Sigma-Aldrich

Kupfer, powder (spheroidal), 10-25 μm, 98%

Sigma-Aldrich

Kupfer, powder (dendritic), <45 μm, 99.7% trace metals basis

Sigma-Aldrich

Kupfer, foil, thickness 0.025 mm, 99.98% trace metals basis

Sigma-Aldrich

Kupfer, turnings, purum p.a., ≥99.0%

Sigma-Aldrich

Kupfer, nanopowder, 60-80 nm particle size (APS), ≥99.5% trace metals basis

Sigma-Aldrich

Cadmium, granular, ≥99%, 5-20 mesh

Sigma-Aldrich

Kupfer, ACS reagent, granular, 10-40 mesh, ≥99.90%

Sigma-Aldrich

Kupfer, beads, 2-8 mm, 99.9995% trace metals basis

Sigma-Aldrich

Kupfer, foil, ≥99.8% (complexometric)

Sigma-Aldrich

Kupfer, foil, thickness 1.0 mm, 99.999% trace metals basis

Sigma-Aldrich

Blei, shot, <2 mm, 99.9% trace metals basis

Sigma-Aldrich

Kupfer, foil, thickness 0.5 mm, 99.98% trace metals basis

Sigma-Aldrich

Kupfer, wire, diam. 0.25 mm, 99.999% trace metals basis

Sigma-Aldrich

Kupfer, shot, −3-+14 mesh, 99%

Sigma-Aldrich

Thiosemicarbazid, puriss. p.a., 98%

Sigma-Aldrich

Blei, powder, −325 mesh, ≥99% trace metals basis

Sigma-Aldrich

Kupfer, beads, 2-8 mm, ≥99.99% trace metals basis

Sigma-Aldrich

Blei, shot, 1-3 mm, 99.995% trace metals basis

Sigma-Aldrich

Kupfer, wire, diam. 2.0 mm, 99.999% trace metals basis

Sigma-Aldrich

Kupfer, wire, diam. 0.64 mm, 99.995% trace metals basis