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Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue

Author

Listed:
  • Binhao Liu

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Shengxiao Wang

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
    China Tobacco Shandong Industrial Co., Ltd., Jinan 250104, China)

  • Pengcheng Dong

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Xinzhe Zhang

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Long Zhang

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Chen Chen

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Xihui Xu

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Yan Xia

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Zhenguo Shen

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
    Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing Agricultural University, Nanjing 210095, China)

  • Liang Shi

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
    National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing Agricultural University, Nanjing 210095, China
    The Collaborated Lab of Plant Molecular Ecology (between College of Life Sciences of Nanjing Agricultural University and Asian Natural Environmental Science Center of the University of Tokyo), College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Yahua Chen

    (College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
    Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource, Nanjing Agricultural University, Nanjing 210095, China
    National Joint Local Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing Agricultural University, Nanjing 210095, China
    The Collaborated Lab of Plant Molecular Ecology (between College of Life Sciences of Nanjing Agricultural University and Asian Natural Environmental Science Center of the University of Tokyo), College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China)

Abstract

The retention of copper (Cu) in saline–alkali soil (SAS) during long-term application of biogas residue (BR) with a high concentration of Cu raises concerns. In this work, the fate of Cu was detected using adsorption isotherms, scanning electron microscope—energy dispersive spectrometer, Fourier transform infrared spectrometer, X-ray diffraction, isothermal titration calorimetry, X-ray photoelectron spectroscopy, and microzone X-ray fluorescence spectrometer. The results showed that the main groups for Cu adsorption by SAS and BR were carboxyl, hydroxyl, amide and amine. The adsorption of Cu by the carboxyl group was entropy–enthalpy co-driven (|ΔH| < |TΔS|, ΔH < 0). The adsorption of Cu by the amine group was entropy-driven (|ΔH| > |TΔS|, ΔH > 0). The adsorption of Cu on the SAS and BR was achieved by organic matter rather than minerals. The degradation of BR in the SAS increases the content of Cu adsorption groups such as carboxyl and amine groups, and Cu was adsorbed on the surface or inside SAS through organic groups. This study provides further theoretical support for the application of BR in SAS.

Suggested Citation

  • Binhao Liu & Shengxiao Wang & Pengcheng Dong & Xinzhe Zhang & Long Zhang & Chen Chen & Xihui Xu & Yan Xia & Zhenguo Shen & Liang Shi & Yahua Chen, 2023. "Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue," Agriculture, MDPI, vol. 13(4), pages 1-18, April.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:4:p:915-:d:1129682
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    References listed on IDEAS

    as
    1. Krzysztof Papuga & Jarosław Kaszubkiewicz & Dorota Kawałko & Maria Kreimeyer, 2022. "Effect of Organic Matter Removal by Hydrogen Peroxide on the Determination of Soil Particle Size Distribution Using the Dynamometer Method," Agriculture, MDPI, vol. 12(2), pages 1-14, February.
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