AI Article Synopsis
- The remobilization of metals from contaminated soils poses risks to human health and ecosystems, particularly in smelting areas.
- This study analyzed isotopic data for cadmium (Cd) and zinc (Zn) in soil samples from Avilés (Spain) and Příbram (Czech Republic) to understand the processes that lead to metal remobilization.
- Results indicated heavier Cd isotopes were favored in chemical extractions, while Zn isotopes varied depending on soil types and land use, revealing mechanisms like anthropogenic leaching or internal redistribution of metals within soils.
Article Abstract
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 δZn 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 δCd 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.
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| http://dx.doi.org/10.1016/j.jhazmat.2022.129519 | DOI Listing |
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