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<p>Cadmium-contaminated soil is a serious environmental problem because of its effects on crop production, the soil microbial community, and risks to human health. Various commercial amendments are widely used in the immobilization of heavy metal-contaminated soil because of their cost-effectiveness, eco-friendliness, and community acceptance. This study was conducted to assess the effects of the cornstarch-containing amendment (CS) and compare their effects on immobilizing the exchangeable Cd content in soil, reducing Cd uptake by plants, and the soil microbial community development with other commercial amendments such as bentonite (B), talc (T), and activated carbon (AC). The results indicated that CS and its composites (T + CS and B + CS) had the greatest effect on reducing Cd mobility in soil (up to 10% in CS), decreasing Cd uptake by lettuce (up to 78% in T + CS), and increasing the microbial community in soil compared with the control. Furthermore, the results from the Biolog Ecoplate and real-time polymerase chain reactions indicated that the mixture amendments (T + CS and B + CS) had the greatest effect on the microbial community, increasing the soil microbial population maximum by 3.81-fold (in B + CS) compared with the control. The results indicated that applying composite amendments provided an efficient option for immobilizing Cd in soil, reducing Cd uptake by plants and increasing the microbial community.</p>

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Immobilizing effects of cornstarch-containing amendments on exchangeable Cd in merged soil: focused on plant uptake and the soil microbial community

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Tuan Nguyen Quoc,
  • Myung Chae Jung

摘要

Cadmium-contaminated soil is a serious environmental problem because of its effects on crop production, the soil microbial community, and risks to human health. Various commercial amendments are widely used in the immobilization of heavy metal-contaminated soil because of their cost-effectiveness, eco-friendliness, and community acceptance. This study was conducted to assess the effects of the cornstarch-containing amendment (CS) and compare their effects on immobilizing the exchangeable Cd content in soil, reducing Cd uptake by plants, and the soil microbial community development with other commercial amendments such as bentonite (B), talc (T), and activated carbon (AC). The results indicated that CS and its composites (T + CS and B + CS) had the greatest effect on reducing Cd mobility in soil (up to 10% in CS), decreasing Cd uptake by lettuce (up to 78% in T + CS), and increasing the microbial community in soil compared with the control. Furthermore, the results from the Biolog Ecoplate and real-time polymerase chain reactions indicated that the mixture amendments (T + CS and B + CS) had the greatest effect on the microbial community, increasing the soil microbial population maximum by 3.81-fold (in B + CS) compared with the control. The results indicated that applying composite amendments provided an efficient option for immobilizing Cd in soil, reducing Cd uptake by plants and increasing the microbial community.