Geochemical Decoupling of Iron and Zinc during Transformation of Zn-Bearing Ferrihydrite in Reducing Sediments
Pierre Lefebvre, Andrew R C Grigg, Ruben Kretzschmar · 2024
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Description
Pierre Lefebvre and co-authors studied in 2024 how a common iron mineral changes in oxygen-poor sediments. The mineral is ferrihydrite carrying zinc, a contaminant metal locked inside it. Lab studies with pure minerals existed, but real sediments are far more complex. The team mixed labeled ferrihydrite into natural sediment and kept it under reducing conditions for up to six months.
They tracked iron and zinc separately with spectroscopy tools. Iron was reduced and moved into a mixed-valence phase much like green rust. Zinc instead left into the pore water and was caught again as zinc sulfide or zinc carbonates. The two metals thus went their own ways early in the change. The authors stress that real soil chemistry, not the mineral alone, decides where such metals end up.
Catalog record
| CREATOR | Pierre Lefebvre, Andrew R C Grigg, Ruben Kretzschmar |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 45 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |