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首页> 外文期刊>RSC Advances >Adsorption of radioactive iodine on surfactant-modified sodium niobate
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Adsorption of radioactive iodine on surfactant-modified sodium niobate

机译：放射性碘对表面活性剂改性铌酸钠的吸附

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摘要

Iodine radioisotopes have been released into the environment both by the nuclear industry and as a result of medical treatment using radioactive materials, potentially posing a serious threat to human health. Thus, when developing applications of radioactive iodine, emergency procedures for dealing with it, and preventing its leakage, are constant concerns. In this study, nanofibers and cubes of Ag2O anchored sodium niobate composites were synthesized by a wet chemical process, and characterized by means of XRD, SEM, TEM and BET techniques. It was found that the well-dispersed Ag2O nanocrystals (3-5 nm) were firmly anchored on the external surface of sodium niobate along the planes with crystallographic similarity to those of Ag2O. These composites can efficiently capture I- anions by precipitating Agl, firmly attaching it to the substrate and allowing it to be recovered easily for safe disposal. Variations in the iodine removal abilities with differing pH value, adsorption time, adsorption temperature, initial I- concentration, and in the presence of competing ions, were studied. The maximum monolayer adsorption capacities of I- anions for Ag2O anchored sodium niobate nanofibers and cubes were found to be 296 and 193 m(2) g(-1) respectively. TEM, XRD, XPS and Raman results indicated that I- anion adsorption was mainly due to the Ag2O nanocrystals on the sodium niobate surfaces. We conclude that Ag2O deposited on sodium niobate hass a great potential for removal of radioactive iodine from waste water.
机译：碘射电流率被核工业释放到环境中，并且由于使用放射性物质的医疗，可能对人类健康构成严重威胁。因此，在开发放射性碘的应用时，应对其处理的紧急程序，并防止其泄漏是持续的问题。在该研究中，通过湿化学工艺合成Ag2O锚固铌酸钠复合材料的纳米纤维和立方体，并通过XRD，SEM，TEM和BET技术表征。发现井分散的Ag2O纳米晶体（3-5nm）沿着具有与Ag 2 O的晶体相似性的平面牢固地固定在铌酸钠的外表面上。这些复合材料可以通过沉淀AGL来有效地捕获I-阴离子，将其牢固地将其连接到基板并允许其容易地恢复以进行安全处理。研究了具有不同pH值，吸附时间，吸附温度，初始I-浓度和在竞争离子的存在的碘去除能力的变化。 Ag2O锚定铌酸钠纳米纤维和立方体的最大单层吸附能力分别为296和193m（2 )g（-1）。 TEM，XRD，XPS和拉曼结果表明I-Anion吸附主要是由于铌酸钠表面上的Ag2O纳米晶体。我们得出结论，Ag2O沉积在铌酸钠HAS上的巨大潜力，用于从废水中除去放射性碘。

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  • 来源
    《RSC Advances》 |2016年第85期|共7页
  • 作者

    Mu Wanjun; Yu Qianhong; Li Xingliang; Wei Hongyua; Jian Yuan;

  • 作者单位

    China Acad Engn Phys Inst Nucl Phys &

    Chem 64 Mianshan Rd Mianyang 621900 Sichuan Provinc Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem 64 Mianshan Rd Mianyang 621900 Sichuan Provinc Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem 64 Mianshan Rd Mianyang 621900 Sichuan Provinc Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem 64 Mianshan Rd Mianyang 621900 Sichuan Provinc Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem 64 Mianshan Rd Mianyang 621900 Sichuan Provinc Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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