| H2O2活化蒙脱石对溶液中U(Ⅵ)的吸附 |
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| 引用本文： | 魏青峰,石艳明,李同同,王彦惠,卫纯纯,庹先国.H2O2活化蒙脱石对溶液中U(Ⅵ)的吸附[J].核化学与放射化学,1980,41(6):578-584. |
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| 作者姓名： | 魏青峰 石艳明 李同同 王彦惠 卫纯纯 庹先国 |
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| 作者单位： | 西南科技大学 国防科技学院，四川 绵阳621010；中广核工程有限公司，广东 深圳518000；四川轻化工大学，四川 自贡643000 |
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| 摘 要： | 利用H2O2对蒙脱石进行活化，获得了活化蒙脱石吸附材料(AX-MMT)，采用X射线衍射(XRD)、傅里叶红外谱图(FTIR)、透射电镜(TEM)、扫描电镜(SEM)、比表面分析(BET)、表面Zeta电位分析等手段对活化样品进行了表征；采用静态批量实验法，考察了H2O2浓度、pH值、接触时间和共存阴阳离子对U(Ⅵ)在AX-MMT上吸附率的影响。结果表明：活化保留了蒙脱石基础结构，其阳离子交换容量(CEC)有所减少，但层间距、比表面积、孔隙体积、表面酸位点和表面Zeta电位均有明显提升，对溶液中U(Ⅵ)的吸附性能显著增强；在最佳活性和吸附条件下(H2O2质量分数、pH值和接触时间分别为10%、6和24 h)，蒙脱石对U(Ⅵ)的吸附性能提升了8.5倍，吸附行为符合准二级吸附动力学模型；在共存阴阳离子的干扰下，H2O2活化蒙脱石能对U(Ⅵ)展现良好的吸附性能。
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| 关 键 词： | H2O2 活化 蒙脱石 U(Ⅵ) 吸附 |
Adsorption of U(Ⅵ) From Aqueous Solution by Hydrogen Peroxide Activated Montmorillonite |
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| WEI Qing-feng,SHI Yan-ming,LI Tong-tong,WANG Yan-hui,WEI Chun-chun,TUO Xian-guo.Adsorption of U(Ⅵ) From Aqueous Solution by Hydrogen Peroxide Activated Montmorillonite[J].Journal of Nuclear and Radiochemistry,1980,41(6):578-584. |
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| Authors: | WEI Qing-feng SHI Yan-ming LI Tong-tong WANG Yan-hui WEI Chun-chun TUO Xian-guo |
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| Affiliation: | School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China;China Nuclear Power Engineering, Shenzhen 518000, China; Sichuan Polytechnic University, Zigong 643000, China |
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| Abstract: | Active montmorillonite adsorption material(AX-MMT) was obtained by activating montmorillonite with hydrogen peroxide. The activated samples were characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), transmission electron microscopy(TEM), scanning electron microscopy(SEM), specific surface analysis(BET) and surface Zeta potential analysis. The effects of concentration of hydrogen peroxide, pH value, contact time and coexisting anions and cations on U(Ⅵ) adsorption on AX-MMT were investigated by static batch experiment. Under the optimum conditions(concentration of hydrogen peroxide, pH value and contact time are 10%, 6 and 24 h, respectively), the adsorption percentage of U(Ⅵ) on montmorillonite increases by 8.5 times, which accords with the quasi-second-order adsorption kinetics model. Under the interference of both anions and cations,H2O2 activated montmorillonite can also exhibit good adsorption properties for U(Ⅵ). |
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| Keywords: | hydrogen peroxide activation montmorillonite U(Ⅵ) adsorption |
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