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- W1964518069 abstract "Abstract Because of the low solubility of Zn in alkaline soils, it is virtually impossible to measure Zn activity directly. In the present study Zn activities in 10 arid‐zone soils were obtained by chelation. The Zn activities were extremely low, ranging from 10 −7.9 to 10 −10.9 M and were inversely related to pH, with a correlation coefficient of 0.94. Direct identification of solid phases controlling Zn solubility in these soils has not been achieved. The Zn activities measured in these soils can be expressed by the relationship soil Zn + 2H + ⇌ Zn 2+ with log K o = 5.7 ± 0.38, where K o is the equilibrium constant expressed in terms of activities. This is nearly identical to that reported earlier from this laboratory. This observed solubility relationship could be explained by the formation of ZnFe 2 O 4 (franklinite), but that possibility awaits further study." @default.
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- W1964518069 date "1990-05-01" @default.
- W1964518069 modified "2023-10-02" @default.
- W1964518069 title "Divalent Zinc Activity in Arid-Zone Soils Obtained by Chelation" @default.
- W1964518069 doi "https://doi.org/10.2136/sssaj1990.03615995005400030015x" @default.
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