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 |
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作者姓名: | Jie Zhang |
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作者单位: | College of Environmental Science and Engineering, Tongji University |
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摘 要: | 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.
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关 键 词: | Pb(Ⅱ) 多壁碳纳米管 铜(Ⅱ) 氨基硫脲 固相萃取 环境样品 制备 接枝 |
收稿时间: | 2/6/2013 12:00:00 AM |
修稿时间: | 4/2/2013 12:00:00 AM |
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