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The Response of Cd Chemical Fractions to Moisture Conditions and Incubation Time in Arable Land Soil

Author

Listed:
  • Nan Lu

    (Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an Jiaotong University, Technology Innovation Center for Land Engineering and Human Settlements, Xi’an 712000, China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China
    Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China
    Shaanxi Engineering Research Center of Land Consolidation, Xi’an 710075, China)

  • Yang Wei

    (Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an Jiaotong University, Technology Innovation Center for Land Engineering and Human Settlements, Xi’an 712000, China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China
    Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China
    Shaanxi Engineering Research Center of Land Consolidation, Xi’an 710075, China)

  • Zhaoxin Zhang

    (Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China
    Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China
    Shaanxi Engineering Research Center of Land Consolidation, Xi’an 710075, China)

  • Yan Li

    (Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an Jiaotong University, Technology Innovation Center for Land Engineering and Human Settlements, Xi’an 712000, China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China
    Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China
    Shaanxi Engineering Research Center of Land Consolidation, Xi’an 710075, China)

  • Gang Li

    (Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an Jiaotong University, Technology Innovation Center for Land Engineering and Human Settlements, Xi’an 712000, China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China
    Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China
    Shaanxi Engineering Research Center of Land Consolidation, Xi’an 710075, China)

  • Jichang Han

    (Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China)

Abstract

Heavy metal pollution in soils is an issue of global concern, and many scholars have focused on Cadmium (Cd) because of its strong biological migration and toxicity. This study explored arable land soil, changes in external Cd contamination processes and its response to soil moisture conditions, and indoor simulation. After adding an external source of 5 mg/kg d.w., the distribution of soil Cd fractions content, EXC-Cd, CAB-Cd, FMO-Cd, OM-Cd, and RES-Cd, were continuously monitored under different water management regimes, and correlation analysis and regression equations were calculated. The results show that after external Cd entered arable land soils, the binging strength of pollutants and soil gradually increased with incubation time, and the distribution of Cd chemical forms was more stable under different water management regimes. The oversaturated water content promotes the transformation of EXC-Cd to other forms. The transformation of CAB-Cd fractions can be accelerated to other fractions by field capacity, and the active conversion period was 30–60 d. Not all Cd fractions correlated between each other, under the four water management regimes, but it seems that the reducibility of the soil environment was more conducive to external Cd fixation and stability. The response surface design method (RSM) was used to establish quantitative regimes between Cd fractions with incubation time and soil moisture, and the soil moisture content and incubation time had an obvious effect on FMO-Cd content, with R 2 = 0.9542.

Suggested Citation

  • Nan Lu & Yang Wei & Zhaoxin Zhang & Yan Li & Gang Li & Jichang Han, 2022. "The Response of Cd Chemical Fractions to Moisture Conditions and Incubation Time in Arable Land Soil," Sustainability, MDPI, vol. 14(10), pages 1-15, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:10:p:6270-:d:820688
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    References listed on IDEAS

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    1. Nan Lu & Gang Li & Yingying Sun & Yang Wei & Lirong He & Yan Li, 2021. "Phytoremediation Potential of Four Native Plants in Soils Contaminated with Lead in a Mining Area," Land, MDPI, vol. 10(11), pages 1-12, October.
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    Cited by:

    1. Yongping Gao & Xiaojun Li, 2022. "Effects of Bentonite Addition on the Speciation and Mobility of Cu and Ni in Soils from Old Mine Tailings," Sustainability, MDPI, vol. 14(17), pages 1-10, August.

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