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Query : "coal ash"

Results 1 - 10 of 319

Coal ash management would remain a great concern all over the world. Several studies proposed that there is an ample scope for safe utilization of coal ash as a soil ameliorant that may improve physical, chemical and biological properties of the soil and is a source of readily available plant micro and macro nutrient. With this concept a pot culture experiment was carried out in the eastern gh ...

SUBJECT: psidium guajava; proximate composition; ashes; application rates; nutrients

POSTED TO: Pakistan Journal of Agricultural Sciences (Pakistan) [0552-9034]

The Tennessee Valley Authority Kingston coal ash spill in December 2008 deposited approximately 4.1 million m³ of fly ash and bottom ash into the Emory and Clinch River system (Harriman, Tennessee, U.S.A.). The objective of this study was to investigate the impact of the ash on surface water and sediment quality over an eighteen month period after the spill, with a specific focus on mercury a ...

SUBJECT: rivers; risk assessment; wastes; mercury; environmental impact

POSTED TO: Environmental Science & Technology [1520-5851]

On December 22, 2008 a dike containing coal fly ash from the Tennessee Valley Authority Kingston Fossil Plant near Kingston Tennessee USA failed and resulted in the largest coal ash spill in U.S. history. Coal ash, a by-product of coal combustion, is known to contain multiple contaminants of concern, including arsenic and selenium. The purpose of this study was to investigate species differenc ...

SUBJECT: liver; physiology; metals; stomach; bioaccumulation

POSTED TO: Ecotoxicology and environmental safety [0147-6513]

Selenium (Se) in coal ash spills poses a threat to adjacent ecosystems because of its potential to mobilize and bioaccumulate in aquatic organisms. Given that the mobility and bioavailability of Se is controlled by its valence states, we aimed to define Se speciation in coal ash solids and examine the relationships between Se speciation and the magnitude of its mobilization from coal ash. We u ...

SUBJECT: wastes; absorption; fossils; spectral analysis; bioaccumulation

POSTED TO: Environmental Science & Technology [1520-5851]

Studies on the fusibility of coal ash

Pugal, D.L. et al. [jan-mar1995]

A study, which aims to develop a technology for the preparation of a high quality adsorbent for SOx using coal ash to control air pollution caused by coal-fired thermal power plants in the Philippines, is currently being undertaken jointly by ITDI and HNIRI. During its first year of implementation, the physical, chemical and thermal characteristics of Philippine and Japanese coal ash samples w ...

SUBJECT: charbon; control de la contaminacion; composicion quimica; point de fusion; punto de fusion

POSTED TO: Philippine Technology Journal (Philippines) [0116-7294]

Hydrogen sulfide is highly toxic to benthic organisms and may cause blue tide with depletion of dissolved oxygen in water column due to its oxidation. The purpose of this study is to reveal the combined adsorption and oxidation mechanisms of hydrogen sulfide on granulated coal ash that is a byproduct from coal electric power stations to apply the material as an adsorbent for hydrogen sulfide i ...

SUBJECT: toxicity; dissolved oxygen; adsorption; absorption; oxidation

POSTED TO: Journal of colloid and interface science [0021-9797]

Unmanned aerial vehicles (UAVs) offer new opportunities to monitor pollution and provide valuable information to support remediation. Their low-cost, ease of use, and rapid deployment capability make them ideal for environmental emergency response. Here we present a UAV-based study of the third largest coal ash spill in the United States. Coal ash from coal combustion is a toxic industrial was ...

SUBJECT: ponds; toxicity; environmental monitoring; coal ash; water pollution

POSTED TO: Environmental pollution [0269-7491]

The principle aim of this paper is to understand the crystallization of coal ash slags and the effects on the viscosity by means of high temperature viscosity measurements, in combination with FactSage modeling, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Four coal ashes with the fusion temperatures between 1130 and 1470 °C applied in entrained flow gasifiers in China wer ...

SUBJECT: scanning electron microscopy; models; calcium oxide; thermodynamics; x-ray diffraction

POSTED TO: Energy & Fuels [1520-5029]

Coal combustion residuals (CCRs), the largest industrial waste in the United States, are mainly stored in surface impoundments and landfills. Here, we examine the geochemistry of seeps and surface water from seven sites and shallow groundwater from 15 sites in five states (Tennessee, Kentucky, Georgia, Virginia, and North Carolina) to evaluate possible leaking from coal ash ponds. The assessme ...

SUBJECT: ponds; calcium; geochemistry; strontium; groundwater

POSTED TO: Environmental Science & Technology [1520-5851]

The largest environmental release of coal ash in US history occurred in December 2008 with the failure of a retention structure at the Tennessee Valley Authority Kingston Fossil Fuel Plant in East Tennessee. A byproduct of coal-burning power plants, coal ash is enriched in metals and metalloids such as selenium and arsenic with known toxicity to fish embryonic and larval life stages. The early ...

SUBJECT: rivers; laboratory techniques; toxicity; fish eggs; abnormal development

POSTED TO: Bulletin of environmental contamination and toxicology [0007-4861]