Selenium in coal-fired steam plant emissions

Andrén, Anders; Klein, David H.; Talmi, Yair

doi:10.1021/es60107a002

Cited by 184 publications

(88 citation statements)

References 12 publications

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“…In some areas of the West, including Denali in Alaska and Haleakala in Hawaii, the ambient selenium concentrations are close to the analytical mdl of 0.03 ng/m 3 . The uncertainty of the mean in these cases is larger than at sites with higher concentrations for two reasons.…”

Section: Mean Selenium and Sulfurmentioning

confidence: 54%

“…Each mean is based on 26 daily samples. The major source of uncertainty in the mean is the variation in ambient concentrations rather than analytical uncertainty, except for selenium means that are below about 0.10 ng/m 3 . Figures 2 and 3 show maps of mean concentrations for both elements for both summer 1993 and winter 1993-1994.…”

Section: Mean Selenium and Sulfurmentioning

confidence: 99%

“…[2][3][4] However, because the selenium vapor condenses to a particle more rapidly than the SO 2 is converted to sulfate, the S/Se ratio for particles should increase as the plume ages. 5 Tuncel et al measured ratios of 1000 ± 500 at urban sites with high coal combustion, 1700 ± 1200 at three remote sites in the Ohio Valley, and 3400 ± 1400 in the Shenandoah Valley.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Selenium and Sulfur at Remote Sites

Eldred

1997

Journal of the Air & Waste Management Association

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Section: Mean Selenium and Sulfurmentioning

confidence: 54%

Section: Mean Selenium and Sulfurmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Selenium and Sulfur at Remote Sites

Eldred

1997

Journal of the Air & Waste Management Association

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“…Adsorption rates differing among ESP fields is important because if samples are collected from an ash hopper underneath one of the later fields, then Se may be greatly enriched compared to that collected from an earlier field. Andren and Klein [57] reported a fresh ash Se concentration of 28.0 µg•kg −1 at the inlet of the precipitator and concentration of 88.3 µg Se kg −1 at the outlet. Therefore, reporting the exact fly ash collection location would provide useful insight in future studies.…”

Section: Initial Ash Characteristicsmentioning

confidence: 99%

Extraction Characteristics of Selenium as Affected by Coal Fly Ash Type, Water Extractant, and Extraction Time

Cantrell¹,

Brye²,

Miller³

et al. 2014

JEP

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Selenium (Se) contamination can be a potential groundwater concern near un-lined coal ash landfills. Of all the Environmental Protection Agency's priority and non-priority pollutants, Se has the narrowest concentration range considered beneficial and detrimental for aquatic and terrestrial organisms. The effects of ash type (i.e., fresh and weathered), water-extractant type (i.e., deionized water, rainwater, and groundwater), and extraction time (i.e., 2 and 6 hours) on Se, arsenic (As), and chromium (Cr) concentrations were investigated from Class C, subbituminous coal fly ash produced at the Flint Creek Power Plant (Benton County, AR). Water-extractable Se concentrations differed (p = 0.03) between ash types across water-extractants, but were unaffected (p > 0.05) by extraction times. Unexpectedly, fresh ash water-extractable Se concentrations were below minimum detection limits (i.e., 2.0 µg•L −1 ) for all treatments. In contrast, averaged over extraction times, the water-extractable Se concentration from weathered ash was greatest (p < 0.05) with groundwater and rainwater, which did not differ and averaged 60. M. A. Cantrell et al.1127

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“…As is the case with arsenic, emissions from coal combustion and metallurgical processes are major atmospheric sources of the selenium (12,43). There is, therefore, the parallel question as to what effects there are on atmospheric Se, in terms of bioavailability, in the presence of acidic atmospheric moisture.…”

Section: Atmospheric Transformations Of Seleniummentioning

confidence: 99%

Potential impact of acid precipitation on arsenic and selenium.

Mushak¹

1985

Environ Health Perspect

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The potential impact of acidic precipitation on the environmental mobility of the metalloids arsenic (As) and selenium (Se) has not been given much attention and is poorly understood. As with other elements, the interest here is the potential effect of environmental acidification on environmental behavior in ways that are relevant to human exposure to these metalloids. Available information on acid precipitation and the environmental behavior of these metalloids do, however, permit some preliminary conclusions to be drawn.Both As and Se appear to be mobilized from household plumbing into tap water by the corrosive action of soft, mildly acidic water, while surface water catchment systems in areas impacted by acidic deposition may contain elevated soluble As levels.Acidification of aquatic ecosystems that are drinking water sources may pose the prospect of enhanced release of As from sediment to water as well as reduction in water levels of Se. Acidification of ground waters, where As appears to be especially mobile, is of particular concern in this regard.The potential impact of acidic deposition on As and Se in soils cannot readily be assessed with respect to human exposure, but it would appear that the behavior of these metalloids in poorly buffered, poorly immobilizing soils, e.g., sandy soils of low metal hydrous oxide content, would be most affected. The effect is opposite for the two elements; lowered pH would appear to enhance As mobility and to reduce Se availability.Altered acidity of both soil and aquatic systems poses a risk for altered biotransformation processes involving both As and Se, thereby affecting the relative amounts of different chemical forms varying in their toxicity to humans as well as influencing biogeochemical cycling.

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Selenium in coal-fired steam plant emissions

Cited by 184 publications

References 12 publications

Comparison of Selenium and Sulfur at Remote Sites

Comparison of Selenium and Sulfur at Remote Sites

Extraction Characteristics of Selenium as Affected by Coal Fly Ash Type, Water Extractant, and Extraction Time

Potential impact of acid precipitation on arsenic and selenium.

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