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Journal of Inorganic Materials, Volume. 35, Issue 3, 381(2020)

Ternary Layered Double Hydroxide Supported Sulfide NZVI: Efficient U(VI) Elimination and Mechanism

Hongwei PANG1... Hao TANG1, Jiaqi WANG2, Xiangxue WANG1,2 and Shujun YU1,* |Show fewer author(s)
Author Affiliations
  • 1MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
  • 2Heibei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
    Equations (6)
    References (33)
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    Figures & Tables(9)
    SEM images of NZVI (A), SNZVI (B), CMAL (C) and CMAL-SNZVI (E); TEM images of CMAL (D) and CMAL- SNZVI (F)
    1. SEM images of NZVI (A), SNZVI (B), CMAL (C) and CMAL-SNZVI (E); TEM images of CMAL (D) and CMAL- SNZVI (F)

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    Element mapping of Ca(A), Mg(B), Al(C), Fe(D), S(E), and O(F), and EDS pattern (G) of CMAL-SNZVI
    2. Element mapping of Ca(A), Mg(B), Al(C), Fe(D), S(E), and O(F), and EDS pattern (G) of CMAL-SNZVI

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    XRD patterns (A) of CMAL-SNZVI, CMAL and SNZVI, N2 adsorption-desorption isotherm (B)and magnetization curve (C) of CMAL-SNZVI
    3. XRD patterns (A) of CMAL-SNZVI, CMAL and SNZVI, N2 adsorption-desorption isotherm (B)and magnetization curve (C) of CMAL-SNZVI

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    Adsorption kinetics (A), pseudo-first-order (B) and pseudo-second-order kinetic plots (C), adsorption isotherms (D) of U(VI) adsorption on CMAL-SNZVI and CMAL
    4. Adsorption kinetics (A), pseudo-first-order (B) and pseudo-second-order kinetic plots (C), adsorption isotherms (D) of U(VI) adsorption on CMAL-SNZVI and CMAL

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    Effect of pH (A) and ionic strength (C) on U(VI) adsorption of CMAL-SNZVI and CMAL, Zeta potential values of CMAL-SZVI as a function of pH (B), species distribution of U(VI) as a function of pH by Visual MINTEQ (D)
    5. Effect of pH (A) and ionic strength (C) on U(VI) adsorption of CMAL-SNZVI and CMAL, Zeta potential values of CMAL-SZVI as a function of pH (B), species distribution of U(VI) as a function of pH by Visual MINTEQ (D)

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    XPS survey spectra of CMAL-SNZVI (before and after U(VI) adsorption) (A), High -resolution XPS spectra of U4f (B), Fe2p (C), S2p (D), Ca2p (E), Mg1s (F) and Al2p (G), and removal mechanisms of U(VI) on CMAL-SNZVI (H)
    6. XPS survey spectra of CMAL-SNZVI (before and after U(VI) adsorption) (A), High -resolution XPS spectra of U4f (B), Fe2p (C), S2p (D), Ca2p (E), Mg1s (F) and Al2p (G), and removal mechanisms of U(VI) on CMAL-SNZVI (H)

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    • Table 1. Kinetic modeling of U(VI) adsorption on CMAL and CMAL-SNZVI

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      Table 1. Kinetic modeling of U(VI) adsorption on CMAL and CMAL-SNZVI

      MaterialPseudo-first-order modelPseudo-second-order model
      k1/min-1Qe/(mg·g-1)R2k2/(g·mg-1·min-1)Qe/(mg·g-1)R2
      CMAL0.04962.620.950.001565.360.99
      CMAL-SNZVI0.12187.600.940.003690.090.99

    • Table 2. Parameters calculated from the Langmuir and Freundlich models for U(VI) adsorption on CMAL-SNZVI at 25 ℃

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      Table 2. Parameters calculated from the Langmuir and Freundlich models for U(VI) adsorption on CMAL-SNZVI at 25 ℃

      AdsorbentsLangmuir modelFreundlich model
      Qmax/(mg·g-1)KL/(L·mg-1)R2KF/(mg1-n·Ln·g-1)nR2
      CMAL129.80.360.97551.53.890.877
      CMAL175.70.950.95489.54.600.933
      -SNZVI

    • Table 3. Comparison of CMAL-SNZVI with other typical adsorbents for U(VI) decontamination

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      Table 3. Comparison of CMAL-SNZVI with other typical adsorbents for U(VI) decontamination

      AdsorbentspHEquilibrium time/hRemoval capacity /(mg·g-1)Ref.
      nZVI/C composite4.0Not given103.1[25]
      g-C3N4@Ni-Mg-Al-LDH5.0699.7[26]
      Ca-Mg-Al-LDH5.024132.5[27]
      GO@LDH4.510159.7[28]
      Magnetic biochar3.01254.4[29]
      CMAL5.02129.8This study
      CMAL-SNZVI5.02175.7
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    Hongwei PANG, Hao TANG, Jiaqi WANG, Xiangxue WANG, Shujun YU. Ternary Layered Double Hydroxide Supported Sulfide NZVI: Efficient U(VI) Elimination and Mechanism[J]. Journal of Inorganic Materials, 2020, 35(3): 381

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    Paper Information

    Category: RESEARCH PAPER

    Received: Jul. 19, 2019

    Accepted: --

    Published Online: Jan. 27, 2021

    The Author Email: YU Shujun (sjyu@ncepu.edu.cn)

    DOI:10.15541/jim20190365

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology