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首页> 外文期刊>RSC Advances >Preparation and characterization of a core-shell KNO3@alginate-Ca particle with uranium-removal and slow-release of KNO3
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Preparation and characterization of a core-shell KNO3@alginate-Ca particle with uranium-removal and slow-release of KNO3

机译：用铀 - 去除核酸-CA粒子的核壳KNO3 @藻酸酯-CA粒子的制备及表征及KNO3缓慢释放

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摘要

A novel core-shell KNO3@alginate-Ca particle with uranium-removal and slow-release of KNO3 was prepared by a simple method of coaxial electrospinning. The feasibility of the core-shell KNO3@alginate-Ca particle used for uranium removal and slow release of potassium was investigated. The main factors affecting the removal of uranium, including pH, initial concentration, temperature and contact time were investigated. The core-shell KNO3@alginate-Ca particle displayed a high adsorption capacity of 0.825 mmol g(-1) at a pH of 5, initial concentration of 0.963 mmol L-1 and a temperature of 318.15 K, and the maximum uranium absorption frequency was 91.143% at pH 5, 318.15 K and an initial concentration of 0.074 mmol L-1. The adsorption data were fitted well with the non-linear Langmuir isotherms and non-linear pseudo-first-order kinetics. The presence of other cations like K(I) ions, Na(I) ions, Zn(II) ions and Mg(II) ions had almost no effect on the uranium adsorption. The uranium adsorption process was feasible and spontaneous. The adsorption of uranium on the core-shell KNO3@alginate-Ca particle was mainly attributed to exchange between the calcium and uranium. The study of nutrient slow release revealed that the particle showed excellent slow-release properties. Thus, the core-shell KNO3@alginate-Ca particle was a promising adsorbent for uranium removal and a slow-release material for potassium release.
机译：通过同轴静电纺丝的简单方法制备了一种新的新型核 - 壳KNO3 @藻酸-CA颗粒，具有铀的去除和KNO3慢释放。研究了用于去除铀和缓慢释放的核酸壳KNO3 @藻酸酯-CA粒子的可行性。研究了影响去除铀，包括pH，初始浓度，温度和接触时间的主要因素。核壳KNO3 @藻酸CA颗粒在pH的pH值下显示为0.825mmol g（-1）的高吸附容量，初始浓度为0.963mmol l-1和318.15k的温度，以及最大的铀吸收频率在pH5,318.15k和0.074mmol L-1的初始浓度下为91.143％。吸附数据与非线性Langmuir等温线和非线性伪一阶动力学很好。在K（I）离子，Na（I）离子，Zn（II）离子和Mg（II）离子中存在其他阳离子，对铀吸附几乎没有影响。铀吸附过程是可行和自发的。铀对核心壳KNO3 @藻酸酯-CA颗粒的吸附主要归因于钙和铀之间的交换。营养缓慢释放的研究表明，颗粒显示出优异的缓释性能。因此，核壳KNO3 @藻酸酯-CA颗粒是用于铀的去除和钾释放缓释材料的有希望的吸附剂。

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  • 来源
    《RSC Advances》 |2016年第113期|共14页
  • 作者

    Zhang Yahui; Lin Xiaoyan; Liu Hongyan; Qu Yuanyuan; Luo Xuegang;

  • 作者单位

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn Mianyang 621010 Sichuan Peoples R China;

    Minist Educ Engn Res Ctr Biomass Mat Mianyang 621010 Sichuan Peoples R China;

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  • 正文语种 eng
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