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Effects of Enhanced Phytoremediation Techniques on Soil Aggregate Structure

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  • Qiao Yang

    (Land Consolidation and Rehabilitation Center, Ministry of Natural Resources, Beijing 100035, China
    School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
    Technology Innovation Center of Land Engineering, Ministry of Natural Resources, Beijing 100035, China)

  • Hao Yu

    (School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China)

  • Zhongqiu Zhao

    (School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China)

  • Zhengshan Ju

    (Land Consolidation and Rehabilitation Center, Ministry of Natural Resources, Beijing 100035, China
    Technology Innovation Center of Land Engineering, Ministry of Natural Resources, Beijing 100035, China)

Abstract

In response to the current serious problem of soil cadmium (Cd) contamination in agricultural land, phytoremediation technology is a green and environmentally friendly application prospect; however, its remediation efficiency is currently limited. An enhanced phytoremediation technique was constructed using the biodegradable chelator aspartate diethoxysuccinic acid (AES) combined with the plant growth regulator gibberellic acid (GA 3 ) to enhance the formation of maize. This technique has been proven to have a superior remediation effect. However, the safety of the restoration technique is of particular importance. The remediation process not only removes the contaminants, but also ensures that the original structure and stability of the soil is not damaged. In this regard, the constructed enhanced phytoremediation technique was further investigated in this study using soil columns. In combination with microscopic tests, such as X-ray diffraction and scanning electron microscopy, this study investigated the effects of the remediation process on the distribution characteristics of Cd in soil aggregates, and the structure and stability of soil aggregates. This was conducted by analyzing, as follows: plant growth conditions; the morphology, structure and mineral composition of soil aggregates in different soil layers; and the changes in these characteristics. The results demonstrated that the enhanced phytoremediation technique constructed in this study has a negligible impact on the morphology and mineral composition of soil aggregates, while exerting a limited influence on soil structure stability. This indicates that the technique can facilitate the safe utilization of remediated contaminated soil.

Suggested Citation

  • Qiao Yang & Hao Yu & Zhongqiu Zhao & Zhengshan Ju, 2024. "Effects of Enhanced Phytoremediation Techniques on Soil Aggregate Structure," Agriculture, MDPI, vol. 14(11), pages 1-22, October.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:11:p:1882-:d:1505517
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    References listed on IDEAS

    as
    1. Hyunsoo Kim & Kanghee Cho & Oyunbileg Purev & Nagchoul Choi & Jaewon Lee, 2022. "Remediation of Toxic Heavy Metal Contaminated Soil by Combining a Washing Ejector Based on Hydrodynamic Cavitation and Soil Washing Process," IJERPH, MDPI, vol. 19(2), pages 1-14, January.
    2. Mingyong Zhu & Wenming He & Youcun Liu & Zhiyun Chen & Zhicheng Dong & Changbai Zhu & Yankui Chen & Yongzhu Xiong, 2022. "Characteristics of Soil Erodibility in the Yinna Mountainous Area, Eastern Guangdong Province, China," IJERPH, MDPI, vol. 19(23), pages 1-22, November.
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