Strontium isotopic characterization of soils and coal ashes

Mattigod, Shas V.; Rai, Dhanpat; Fruchter, J.S.

doi:10.1016/0883-2927(90)90011-s

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…37 It was suggested that this isotopic trend is due to different Sr sources at different stages of coalification, with the lower rank coals containing more Sr bearing carbonate and sulfate minerals. 37 Yet differentiating 87 Sr/ 86 Sr based on coal rank could be misleading, due to the fact that the rank of coal does not dictate its geological origin, nor its age, which can have a major impact on its isotopic composition. The coal ash reported in Mattigod et al 37 were collected from plants in the U.S., but without identification of the coal source.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…37 Yet differentiating 87 Sr/ 86 Sr based on coal rank could be misleading, due to the fact that the rank of coal does not dictate its geological origin, nor its age, which can have a major impact on its isotopic composition. The coal ash reported in Mattigod et al 37 were collected from plants in the U.S., but without identification of the coal source. The 87 Sr/ 86 Sr isotopic ratio of the CCR leachates in this study ranged from 0.7109 to 0.7126 (Figure 1).…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Strontium isotope ratios were also recognized as a possible CCR tracer. 27,37 It has been shown that Sr isotopic ratios for CCRs can be characterized by coal rank, 37 in which the 87 Sr/ 86 Sr ratio increases with coal maturity: lignites of 0.70767, subbituminous of 0.70874, and bituminous coal of 0.71022. 37 It was suggested that this isotopic trend is due to different Sr sources at different stages of coalification, with the lower rank coals containing more Sr bearing carbonate and sulfate minerals.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…27,37 It has been shown that Sr isotopic ratios for CCRs can be characterized by coal rank, 37 in which the 87 Sr/ 86 Sr ratio increases with coal maturity: lignites of 0.70767, subbituminous of 0.70874, and bituminous coal of 0.71022. 37 It was suggested that this isotopic trend is due to different Sr sources at different stages of coalification, with the lower rank coals containing more Sr bearing carbonate and sulfate minerals. 37 Yet differentiating 87 Sr/ 86 Sr based on coal rank could be misleading, due to the fact that the rank of coal does not dictate its geological origin, nor its age, which can have a major impact on its isotopic composition.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Boron and Strontium Isotopic Characterization of Coal Combustion Residuals: Validation of New Environmental Tracers

Ruhl

Dwyer

Hsu‐Kim

et al. 2014

Environ. Sci. Technol.

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In the U.S., coal fired power plants produce over 136 million tons of coal combustion residuals (CCRs) annually. CCRs are enriched in toxic elements, and their leachates can have significant impacts on water quality. Here we report the boron and strontium isotopic ratios of leaching experiments on CCRs from a variety of coal sources (Appalachian, Illinois, and Powder River Basins). CCR leachates had a mostly negative δ11B, ranging from −17.6 to +6.3‰, and 87Sr/86Sr ranging from 0.70975 to 0.71251. Additionally, we utilized these isotopic ratios for tracing CCR contaminants in different environments: (1) the 2008 Tennessee Valley Authority (TVA) coal ash spill affected waters; (2) CCR effluents from power plants in Tennessee and North Carolina; (3) lakes and rivers affected by CCR effluents in North Carolina; and (4) porewater extracted from sediments in lakes affected by CCRs. The boron isotopes measured in these environments had a distinctive negative δ11B signature relative to background waters. In contrast 87Sr/86Sr ratios in CCRs were not always exclusively different from background, limiting their use as a CCR tracer. This investigation demonstrates the validity of the combined geochemical and isotopic approach as a unique and practical identification method for delineating and evaluating the environmental impact of CCRs.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Boron and Strontium Isotopic Characterization of Coal Combustion Residuals: Validation of New Environmental Tracers

Ruhl

Dwyer

Hsu‐Kim

et al. 2014

Environ. Sci. Technol.

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“…Lead (Pb) is one element for which soil enrichment is a concern. Although background Pb levels are typically on the order 2-300 ug gm-^(1), elevated levels result from diverse inputs such as vehicle emissions, flyash deposition, land application of waste materials, and various industrial activities (2). Lead in topsoil is frequently 1.2 to 4 times subsoil levels (3).…”

Section: Introductionmentioning

confidence: 99%

Role of Fe in Extractive Decontamination of Pb-Polluted Soils

Elliott

Linn

Shields

1989

Hazardous Waste and Hazardous Materials

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The role of Fe in Pb solubilization by ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) from a highly contaminated (21% Pb by weight) battery reclamation site soil was investigated using batch extraction and sequential fractionation experiments. Based on relative complexing ability, soluble Fe(lll) should inhibit Pb recovery using chelating agents, particularly under acidic conditions. Despite a large pool of available Fe (6.7% of soil by weight) and a marked increase in soluble Fe(III) with decreasing pH, Pb solubilization was nearly pH invariant. Since only 12% of Fej compared to 86% of Pbrp was solubilized by 4 x 10~2 M EDTA at pH 6, Pb and Fe apparently exist in differentially reactive forms within the soil. A nine-step chemical fractionation procedure confirmed that 80% of the soil Pb was present in non-detrital

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The Deposition of Trace Elements in the Environs of a Power Station

Godbeer

Swaine

1995

Energy &Amp; Environment

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Strontium isotopic characterization of soils and coal ashes

Cited by 10 publications

References 2 publications

Boron and Strontium Isotopic Characterization of Coal Combustion Residuals: Validation of New Environmental Tracers

Boron and Strontium Isotopic Characterization of Coal Combustion Residuals: Validation of New Environmental Tracers

Role of Fe in Extractive Decontamination of Pb-Polluted Soils

The Deposition of Trace Elements in the Environs of a Power Station

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