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首页> 外文期刊>Environmental Science & Technology >Sorption off ~(243)Am(III) to Multiwall Carbon Nanotubes
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Sorption off ~(243)Am(III) to Multiwall Carbon Nanotubes

机译：吸附〜（243）Am（III）到多壁碳纳米管

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摘要

Carbon nanotubes have attracted great interest in multidisciplinary study since their discovery. Herein, radionuclide ~(243)Am(III) sorption to uncapped multiwall carbon nanotubes (MWCNTs) was carried out at 20 +- 2 ℃ in 0.01 and 0.1 M NaCI0_4 solutions. Effects of ~(243)Am(III) solution concentration, ionic strength, and pH on ~(243)Am-(III) sorption to MWCNTs were also investigated. The sorption is strongly dependent on pH values and weakly dependent on the ionic strength in the experimental conditions. The results show that MWCNTs can adsorb ~(243)Am(III) with extraordinarily high efficiency by forming very stable complexes. Chemisorption or chemicomplexation is the main mechanism of ~(243)Am(III) sorption on the surface of MWCNTs. MWCNTs can be a promising candidate for the preconcentration and solidification of ~(243)Am(III) or its analogue lanthanides and actinides from large volumes of aqueous solution, as required for remediation purposes, and perhaps also as a sorbentforthe removal of heavy metal ions from the industry wastewater.
机译：自发现以来，碳纳米管就引起了多学科研究的极大兴趣。本文中，放射性核素〜（243）Am（III）在20±2℃的0.01和0.1 M NaClO_4溶液中吸附至未封端的多壁碳纳米管（MWCNT）。还研究了〜（243）Am（III）溶液浓度，离子强度和pH对〜（243）Am-（III）吸附到MWCNTs的影响。在实验条件下，吸附强烈依赖于pH值，而弱依赖于离子强度。结果表明，通过形成非常稳定的配合物，MWCNTs可以非常高效地吸附〜（243）Am（III）。化学吸附或化学络合是〜（243）Am（III）在多壁碳纳米管表面吸附的主要机理。 MWCNTs可能是从大量水溶液中预浓缩和固化〜（243）Am（III）或其类似镧系元素和act系元素的有前途的候选者，这是修复的要求，也许还可以作为吸附剂用于去除重金属离子来自工业废水。

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