The feasibility of incorpora'/> Incorporation of Cadmium and Nickel into Ferrite Spinel Solid Solution: X-ray Diffraction and X-ray Absorption Fine Structure Analyses
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Incorporation of Cadmium and Nickel into Ferrite Spinel Solid Solution: X-ray Diffraction and X-ray Absorption Fine Structure Analyses

机译：在铁素体尖晶石固溶体中掺入镉和镍：X射线衍射和X射线吸收精细结构分析

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src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2018/esthag.2018.52.issue-2/acs.est.7b04350/20180111/images/medium/es-2017-04350a_0007.gif">The feasibility of incorporating Cd and Ni in hematite was studied by investigating the interaction mechanism for the formation of CdxNi1–xFe2O4 solid solutions (CNFs) from CdO, NiO, and α-Fe2O3. X-ray diffraction results showed that the CNFs crystallized into spinel structures with increasing lattice parameters as the Cd content in the precursors was increased. Cd2+ ions were found to occupy the tetrahedral sites, as evidenced by Rietveld refinement and extended X-ray absorption fine structure analyses. The incorporation of Cd and Ni into ferrite spinel solid solution strongly relied on the processing parameters. The incorporation of Cd and Ni into the CNFs was greater at high x values (0.7 < x ≤ 1.0) than at low x values (0.0 ≤ x ≤ 0.7). A feasible treatment technique based on the investigated mechanism of CNF formation was developed, involving thermal treatment of waste sludge containing Cd and Ni. Both of these metals in the waste sludge were successfully incorporated into a ferrite spinel solid solution, and the concentrations of leached Cd and Ni from this solid solution were substantially reduced, stabilizing at low levels. This research offers a highly promising approach for treating the Cd and Ni content frequently encountered in electronic waste and its treatment residues.
机译：src =“ http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2018/esthag.2018.52.issue-2/acs.est.7b04350/20180111/images/medium /es-2017-04350a_0007.gif“>通过研究形成Cd x Ni 的相互作用机理，研究了将Cd和Ni掺入赤铁矿的可行性来自CdO，NiO和α-Fe 2的1– x Fe 2 O 4 固溶体（CNF） O 3 。 X射线衍射结果表明，随着前驱体中Cd含量的增加，CNF结晶成尖晶石结构，晶格参数增加。 Rietveld精炼和扩展的X射线吸收精细结构分析证明，Cd 2 + 离子占据了四面体位置。在铁素体尖晶石固溶体中掺入Cd和Ni强烈依赖于加工参数。高 x 值（0.7 i> x ≤1.0）时Cd和Ni的掺入比低 x 值（0.0）高≤ x ≤0.7）。在研究CNF形成机理的基础上，开发了一种可行的处理技术，包括对含Cd和Ni的废渣进行热处理。废污泥中的这两种金属都成功地掺入了铁氧体尖晶石固溶体中，并且从固溶体中浸出的Cd和Ni的浓度大大降低，并稳定在较低水平。这项研究为处理电子废物及其处理残留物中经常遇到的Cd和Ni含量提供了非常有前途的方法。

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  • 来源
    《Environmental Science & Technology》 |2018年第2期|775-782|共8页
  • 作者

    Minhua Su; Changzhong Liao; Tingshan Chan; Kaimin Shih; Tangfu Xiao; Diyun Chen; Lingjun Kong; Gang Song;

  • 作者单位

    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering and Key Laboratory for Water Quality Security and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China,Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong SAR, China;

    Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong SAR, China,Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China;

    National Synchrotron Radiation Research Center, Hsinchu Science Park, Hsinchu, Taiwan;

    Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong SAR, China;

    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering and Key Laboratory for Water Quality Security and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China;

    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering and Key Laboratory for Water Quality Security and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China;

    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering and Key Laboratory for Water Quality Security and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China,Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong SAR, China;

    Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering and Key Laboratory for Water Quality Security and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China;

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