Underlying lithology controls trace metal mobilization during redox fluctuations

Underlying lithology controls trace metal mobilization during redox fluctuations

Redox state fluctuations are a primary mechanism controlling the mobilization of trace metals in soils. However, underlying lithology may modulate the effect that redox fluctuations have on trace metal mobility by influencing soil particle size and mineral composition. To investigate the relationshi...

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Veröffentlicht in:The Science of the total environment 2019-05, Vol.665, p.1147-1157
Hauptverfasser: King, E.K., Thompson, A., Pett-Ridge, J.C.
Format: Artikel
Sprache:eng
Schlagworte:
Critical zone
Lithology
Molybdenum isotopes
Redox biogeochemistry
Soil formation
Trace metal mobilization
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Zusammenfassung:Redox state fluctuations are a primary mechanism controlling the mobilization of trace metals in soils. However, underlying lithology may modulate the effect that redox fluctuations have on trace metal mobility by influencing soil particle size and mineral composition. To investigate the relationships among trace metal behavior, lithology, and redox state, we subjected surface soils from two intensely weathered soil profiles formed on contrasting lithologies to consecutive, 8-day redox cycles. A suite of metals (Al, Mn, Fe, Ti, Rb, Zr, Nb, Mo, REEs, Pb, Th, U) were quantified in the aqueous phase (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2019.02.192