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- W2058808596 abstract "A critical need exists for data evaluation protocols to determine if heavy metal deposition has impacted soil or sediment. For routine reconnaissance these protocols need to be analytically precise and affordable, two issues lacking in many regions. We employed a low-cost, commercially available aqua regia digestion procedure and developed a simple protocol for isolating pristine soil horizons and conservative indexing elements to compare to more Pb impacted soil horizons. Strongly Pb impacted soil horizons are easy to ascertain; however, moderately to slightly Pb impacted soils are more problematic to identify because of the natural Pb variation in soils. Using the harmonic mean of the soil concentrations of Lanthanum (La) and Neodymium (Nd) and also the soil concentrations of Thorium (Th) as conservative indexing elements, we were able to discriminate pristine soils from slightly to moderately Pb impacted soils. Ro values are estimators of elemental gain and loss, with Ro values greater than unity implying Pb addition, providing the comparative loss of other elements or biocycling are substantial contributing factors. All pedons known to have received Pb from atmospheric addition exhibited Ro values appreciably greater than unity, whereas soils known to be not impact or at most minimally impacted showed Ro values near unity. Commercially available and relative low cost aqua regia digestion analysis provided the analytical data for Pb, Fe, La, Nd and Th." @default.
- W2058808596 created "2016-06-24" @default.
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- W2058808596 date "2013-02-01" @default.
- W2058808596 modified "2023-10-01" @default.
- W2058808596 title "Using Lanthanum, Neodymium, and Thorium as Conservative Indexing Elements to Indicate Soil Lead Deposition" @default.
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- W2058808596 doi "https://doi.org/10.1080/15320383.2013.722136" @default.
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