Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue
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 tra...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/13/4/915 |
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| author | Binhao Liu Shengxiao Wang Pengcheng Dong Xinzhe Zhang Long Zhang Chen Chen Xihui Xu Yan Xia Zhenguo Shen Liang Shi Yahua Chen |
| author_facet | Binhao Liu Shengxiao Wang Pengcheng Dong Xinzhe Zhang Long Zhang Chen Chen Xihui Xu Yan Xia Zhenguo Shen Liang Shi Yahua Chen |
| author_sort | Binhao Liu |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T05:19:43Z |
| format | Article |
| id | doaj.art-38ce19afcc314c018918055714935e3d |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-11T05:19:43Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-38ce19afcc314c018918055714935e3d2023-11-17T17:55:19ZengMDPI AGAgriculture2077-04722023-04-0113491510.3390/agriculture13040915Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas ResidueBinhao Liu0Shengxiao Wang1Pengcheng Dong2Xinzhe Zhang3Long Zhang4Chen Chen5Xihui Xu6Yan Xia7Zhenguo Shen8Liang Shi9Yahua Chen10College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaCollege of Life Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaThe 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.https://www.mdpi.com/2077-0472/13/4/915copper fatebiogas residuecomplexationredoxdegradationadsorb |
| spellingShingle | Binhao Liu Shengxiao Wang Pengcheng Dong Xinzhe Zhang Long Zhang Chen Chen Xihui Xu Yan Xia Zhenguo Shen Liang Shi Yahua Chen Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue Agriculture copper fate biogas residue complexation redox degradation adsorb |
| title | Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue |
| title_full | Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue |
| title_fullStr | Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue |
| title_full_unstemmed | Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue |
| title_short | Fate of Copper in Saline–Alkali Soil with Long-Term Application of Biogas Residue |
| title_sort | fate of copper in saline alkali soil with long term application of biogas residue |
| topic | copper fate biogas residue complexation redox degradation adsorb |
| url | https://www.mdpi.com/2077-0472/13/4/915 |
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