Thorium, Uranium and Cesium-137 in Louisiana Soils: Migration Trends in a Soil Catena near Dubach, Louisiana, USA

Burns, Scott F.; Thompson, Ronald H.; Beck, James N.; Meriwether, J.

doi:10.1524/ract.1991.5253.1.241

Cited by 6 publications

(10 citation statements)

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“…Previous studies suggest arsenic levels are likely higher in the B horizon in well-developed soils (Burns et al, 1991). a.…”

Section: Aims and Objectivesmentioning

confidence: 89%

“…The correlation between iron and arsenic suggests that the highest amounts of soil arsenic are typically found in the reddest soils. These are usually B horizon soils where elements such as iron and arsenic have collected over time through leaching processes due to moisture and weathering processes (Birkeland, 1999;Burns et al, 1991). Some studies, particularly in the Bengal Basin of India, suggest a correlation between the weathering of micas and high arsenic levels (Dowling et al, 2002).…”

Section: Source Of Arsenic and Associated Mineralogymentioning

confidence: 99%

“…Few sampled soils were very red, or iron-inundated, and most were characterized as primarily brown in color. This lack of wide spread iron-inundation is most likely due to the young age of many of these soils (Burns et al, 1991;Birkeland, 1999) CHAPTER 4: METHODS…”

Section: 22: Soil Characterizationmentioning

confidence: 99%

“…The lack of statistically significant distinguishability between A and B horizon data is most likely due to the young age of many of the soils tested (Burns et al, 1991;Birkeland, 1999). In this dataset, 31 of the high values at a given site would not have been detected if only A horizon soils were sampled.…”

Section: 4: a Vs B Horizon Analysismentioning

confidence: 99%

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Arsenic in the Soils of Northwest Oregon

Ricker¹

2000

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One hundred and eighty-six soil samples from Northwest Oregon were tested for arsenic content. The highest values measured were 13.9 ppm in the A horizon (site C4) and 20.4 ppm in the B horizon (Site P4). Arsenic was not detected in 28 A horizon samples and 23 B horizon samples. Data are grouped based on the age and rock type of underlying bedrock. Lithologic groups with six or more data points were compared statistically to ascertain if groups are distinct. Analysis of Variance (ANOVA) multiple comparison tests indicate that the arsenic content of the Marine Sediments and Sedimentary Rocks group samples is distinguishable from the Quaternary Basalts group in the A horizon and all other groups in the B horizon. Kruskal-Wallis multiple comparison tests indicate that the arsenic content of the Marine Sediments and Sedimentary Rocks group is distinguishable from the Quaternary Basalts, Quaternary/ Tertiary Sediments and Sedimentary Rocks and Volcanic Sediments groups in both the A and B soil horizons. The ANOVA and Kruskal-Wallis tests compared A and B horizon data by lithologic group. The ANOVA shows the Marine Sediments and Sedimentary Rocks group in the A horizon is distinct from the Quaternary Basalts in the A and B horizon. The Kruskal-Wallis test yielded the same result. Per the ANOVA, the Marine Sediments and Sedimentary Rocks in the B horizon are distinct from all other tested groups. The Kruskal-Wallis test shows the Marine Sediments and Sedimentary Rocks group in the B ii horizon as distinct from the Quaternary Basalts, Quaternary/ Tertiary Sediments, and Volcanic Sediments groups in the A and B horizon. A K-means cluster analysis was used to group all available data independent of underlying bedrock. Three, four, and five group analyses were conducted, and the results of these tests were compared to the data grouped by underlying rock type. No correlation between the groups resulting from the K-means cluster analysis and groups based on underlying lithology was found. This analysis supports the creation of a map distinguishing arsenic content in the soils above Marine Sediments and Sedimentary Rocks group units from arsenic content in all other tested lithologic groups. The mean and standard deviations of these groups (in ppm) are: A horizon: Marine Sediments (6.09 ±2.66); other groups (3.10 ±3.19); B horizon: Marine Sediments (10.26 ±4.65); other groups (3.13, ±2.52). This analysis indicates that geologic context must be taken into account when determining background levels of naturally occurring arsenic in soils.

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“…Previous studies suggest arsenic levels are likely higher in the B horizon in well-developed soils (Burns et al, 1991). a.…”

Section: Aims and Objectivesmentioning

confidence: 89%

Section: Source Of Arsenic and Associated Mineralogymentioning

confidence: 99%

Section: 22: Soil Characterizationmentioning

confidence: 99%

Section: 4: a Vs B Horizon Analysismentioning

confidence: 99%

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Arsenic in the Soils of Northwest Oregon

Ricker¹

2000

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“…Murphy and Shock (1999) found that U is common in surface and near-surface waters where ores or waste materials are present. Burns et al (1991) reported that leaching was the primary migration mechanism in sloping soil (catena) of northern Louisiana, far exceeding overland flow and subsurface through flow. Kaplan and Serkiz (2001), studying sorption of U on sediments, reported a wide range of distribution coefficients ranging from 170 to 6493 mL g −1 , depending on the species of U and oxidation state.…”

Section: Migration Of Du In Soil and Sedimentmentioning

confidence: 99%