Using Lanthanum, Neodymium, and Thorium as Conservative Indexing Elements to Indicate Soil Lead Deposition

Autor:	Julie Weathers, Donn H. Beighley, Indi Braden, Sven Svenson, Wesley Mueller, David Mauk, Michael Aide
Rok vydání:	2013
Předmět:	Health Toxicology and Mutagenesis Soil Science chemistry.chemical_element Thorium Sediment Mineralogy Soil science Pollution Neodymium chemistry.chemical_compound Deposition (aerosol physics) chemistry Soil water Lanthanum Environmental Chemistry Environmental science Aqua regia Soil horizon
Zdroj:	Soil and Sediment Contamination: An International Journal. 22:132-150
ISSN:	1549-7887 1532-0383
Popis:	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 imply...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::edffbc970b047a654107faa8c4722211 https://doi.org/10.1080/15320383.2013.722136 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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