Antagonistic Cd and Zn isotope behavior in the extracted soil fractions from industrial areas

August 7, 2022

CRAES, epartment of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague uses EasySensor DGT to publish the article as below:


•Double-isotope approach allowed predicting metal remobilization in soils.

•The metal isotopic fractionation in extracted soil fraction depended on land uses.

•Cd and Zn are released primarily from anthropogenic materials in sandy soils.

•Cd and Zn were redistributed within forest and agricultural soils before release.


The remobilization of metals accumulated in contaminated soils poses a threat to humans and ecosystems in general. Tracing metal fractionation provides valuable information for understanding the remobilization processes in smelting areas. Based on the difference between the isotopic system of Cd and Zn, this work aimed to couple isotope data and their leachability to identify possible remobilization processes in several soil types and land uses. For soil samples, the δ66/64Zn values ranged from 0.12 ± 0.05‰ to 0.28 ± 0.05‰ in Avilés (Spain) and from − 0.09 ± 0.05‰ to − 0.21 ± 0.05‰ in Příbram (Czech Republic), and the δ114/110Cd ranged from − 0.13 ± 0.05‰ to 0.01 ± 0.04‰ in Avilés and from − 0.86 ± 0.27‰ to − 0.24 ± 0.05‰ in Příbram. The metal fractions extracted using chemical extractions were always enriched in heavier Cd isotopes whilst Zn isotope systematics exhibited light or heavy enrichment according to the soil type and land uses. Coupling Zn and Cd systematics provided a tool for deciphering the mechanisms behind the remobilization processes: leaching of the anthropogenic materials and/or metal redistribution within the soil components prior to remobilization.

Graphical Abstract


Ratié, Z. Vaňková, D. Baragaño, et., 2022. Antagonistic Cd and Zn isotope behavior in the extracted soil fractions from industrial areas, Journal of Hazardous Materials, Volume 439, 129519, ISSN 0304-3894, https: //doi. org/10. 1016/j. jhazmat. 2022. 129519.