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首页> 外文期刊>Environmental Science & Technology >Highly Efficient Enrichment of Radionuclides on Graphene Oxide-Supported Polyaniline
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Highly Efficient Enrichment of Radionuclides on Graphene Oxide-Supported Polyaniline

机译：在氧化石墨烯负载的聚苯胺上高效富集放射性核素

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摘要

Graphene oxide-supported polyaniline (PANI@GO) composites were synthesized by chemical oxidation and were characterized by SEM, Raman and FT-IR spectroscopy, TGA, potentiometric titrations, and XPS. The characterization indicated that PANI can be grafted onto the surface of GO nanosheets successfully. The sorption of U(Ⅵ), Eu(Ⅲ), Sr(Ⅱ). and Cs(Ⅰ) from aqueous solutions as a function of pH and initial concentration on the PANI@GO composites was investigated. The maximum sorption capacities of U(Ⅵ), Eu(Ⅲ), Sr(Ⅱ), and Cs(Ⅰ) on the PANI@GO composites at pH 3.0 and T = 298 K calculated from the Langmuir model were 1.03, 1.65, 1.68, and 1.39 mmol·g~(-1), respectively. According to the XPS analysis of the PANI@GO composites before and after Eu(Ⅲ) desorption, nitrogen- and oxygen-containing functional groups on the surface of PANI@GO composites were responsible for radionuclide sorption, and that radionuclides can hardly be extracted from the nitrogen-containing functional groups. Therefore, the chemical affinity of radionuclides for nitrogen-containing functional groups is stronger than that for oxygen-containing functional groups. This paper focused on the application of PANI@GO composites as suitable materials for the preconcentration and removal of lanthanides and actinides from aqueous solutions in environmental pollution management in a wide range of acidic to alkaline conditions.
机译：通过化学氧化合成氧化石墨烯负载的聚苯胺（PANI @ GO）复合材料，并通过SEM，拉曼光谱和FT-IR光谱，TGA，电位滴定和XPS对其进行表征。表征表明，PANI可以成功地接枝到GO纳米片的表面上。 U（Ⅵ），Eu（Ⅲ），Sr（Ⅱ）的吸附研究了PANI @ GO复合材料中水溶液和Cs（Ⅰ）与pH和初始浓度的关系。根据Langmuir模型计算，在pH 3.0和T = 298 K时，PANI @ GO复合材料上U（Ⅵ），Eu（Ⅲ），Sr（Ⅱ）和Cs（Ⅰ）的最大吸附容量为1.03、1.65、1.68 ，和1.39 mmol·g〜（-1）。根据对Eu（Ⅲ）解吸前后的PANI @ GO复合材料的XPS分析，PANI @ GO复合材料表面的含氮和氧官能团是造成放射性核素吸附的原因，放射性核素很难从中提取出来。含氮官能团。因此，放射性核素对含氮官能团的化学亲和力强于对含氧官能团的化学亲和力。本文着重介绍了PANI @ GO复合材料作为合适的材料在各种酸性到碱性环境中对环境污染管理中的镧系元素和act系元素进行预浓缩和去除的应用。

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  • 来源
    《Environmental Science & Technology》 |2013年第17期|9904-9910|共7页
  • 作者

    Yubing Sun; Dadong Shao; Changlun Chen; Shubin Yang; Xiangke Wang;

  • 作者单位

    Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Science, P.O. Box 1126, Hefei, 230031, P. R. China;

    Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Science, P.O. Box 1126, Hefei, 230031, P. R. China;

    Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Science, P.O. Box 1126, Hefei, 230031, P. R. China;

    Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Science, P.O. Box 1126, Hefei, 230031, P. R. China;

    Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Science, P.O. Box 1126, Hefei, 230031, P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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