Cadmium (Cd), one of the most severe environmental pollutants in soil, poses a great threat to food safety and human health. Understanding the potential sources, fate, and translocation of Cd in soil-plant systems can provide valuable information on Cd contamination and its environmental impacts. Stable Cd isotopic ratios (Cd) can provide “fingerprint” information on the sources and fate of Cd in the soil environment. Here, we review the application of Cd isotopes in soil, including (i) the Cd isotopic signature of soil and anthropogenic sources, (ii) the interactions of Cd with soil constituents and associated Cd isotopic fractionation, and (iii) the translocation of Cd at soil-plant interfaces and inside plant bodies, which aims to provide an in-depth understanding of Cd transport and migration in soil and soil-plant systems. This review would help to improve the understanding and application of Cd isotopic techniques for tracing the potential sources and (bio-)geochemical cycling of Cd in soil environment.

中文翻译：

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镉的稳定同位素特征用于追踪土壤中镉的来源、归宿和易位：综述


镉（Cd）是土壤中最严重的环境污染物之一，对食品安全和人类健康构成巨大威胁。了解土壤-植物系统中镉的潜在来源、归宿和易位可以提供有关镉污染及其环境影响的宝贵信息。稳定的镉同位素比 (Cd) 可以提供有关土壤环境中镉的来源和归宿的“指纹”信息。在这里，我们回顾了镉同位素在土壤中的应用，包括（i）土壤和人为来源的镉同位素特征，（ii）镉与土壤成分的相互作用以及相关的镉同位素分馏，以及（iii）镉的易位土壤-植物界面和植物体内，旨在深入了解土壤和土壤-植物系统中镉的运输和迁移。本综述将有助于提高对镉同位素技术的理解和应用，以追踪土壤环境中镉的潜在来源和（生物）地球化学循环。