The Mine Water Leaching Procedure: Evaluating the Environmental Risk of Backfilling Mines with Coal Ash

Ziemkiewicz, Paul; Simmons, Jennifer; Knox, Anna Sophia

doi:10.1007/978-1-4757-4757-7_6

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…A number of studies have examined the solubility and leaching potential of CUB (Querol et al, 1996, 2001; Sheps‐Pelleg and Cohen, 1999; Hassett et al, 2005). Current procedures include serial batch leaching (Kim and Hesbach, 2009), synthetic groundwater leaching (Hassett, 1998), and mine water leaching (Ziemkiewicz et al, 2003), as well as the USEPA‐developed toxicity characteristic leaching procedure (USEPA Method 1311; USEPA, 1992). A review of these methods is provided by Kim and Hesbach (2009).…”

Section: Methodsmentioning

confidence: 99%

Strontium Isotope Study of Coal Utilization By-Products Interacting with Environmental Waters

et al. 2012

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Sequential leaching experiments on coal utilization by-products (CUB) were coupled with chemical and strontium (Sr) isotopic analyses to better understand the infl uence of coal type and combustion processes on CUB properties and the release of elements during interaction with environmental waters during disposal. Class C fl y ash tended to release the highest quantity of minor and trace elements-including alkaline earth elements, sodium, chromium, copper, manganese, lead, titanium, and zinc-during sequential extraction, with bottom ash yielding the lowest. Strontium isotope ratios ( 87 Sr/ 86 Sr) in bulk-CUB samples (total dissolution of CUB) are generally higher in class F ash than in class C ash. Bulk-CUB ratios appear to be controlled by the geologic source of the mineral matter in the feed coal, and by Sr added during desulfurization treatments. Leachates of the CUB generally have Sr isotope ratios that are diff erent than the bulk value, demonstrating that Sr was not isotopically homogenized during combustion. Variations in the Sr isotopic composition of CUB leachates were correlated with mobility of several major and trace elements; the data suggest that arsenic and lead are held in phases that contain the more radiogenic (high-87 Sr/ 86 Sr) component. A changing Sr isotope ratio of CUB-interacting waters in a disposal environment could forecast the release of certain strongly bound elements of environmental concern. Th is study lays the groundwork for the application of Sr isotopes as an environmental tracer for CUB-water interaction.

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Section: Methodsmentioning

confidence: 99%

Strontium Isotope Study of Coal Utilization By-Products Interacting with Environmental Waters

et al. 2012

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“…Class C ashes are high in CaO (>20%), alkali, and crystalline compounds, but low in silica. 48,49 Class F fly ashes have only modest concentrations of CaO (<20%) and may contain lower proportions of crystalline components, but also have pozzolanic properties. 50,51 Higher CaO, MgO, and alkali concentrations in Class C ashes impart a greater liming capacity to those ashes than to Class F ashes, which have lower proportions of these constituents.…”

Section: Main Soil Constraints To Optimal Crop Productionmentioning

confidence: 99%

Application of Coal Fly Ash in Agriculture: A Strategic Perspective

Yunusa

Loganathan

Nissanka

et al. 2012

Critical Reviews in Environmental Science and Technology

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Fly ash is a major waste of coal-power generation and its management is a major environmental and economic challenge, and it will become even more critical with a projected increase in the reliance on coal for power generation. The authors discuss how the unique physicochemical properties of ash can be strategically employed to ameliorate acidity and sodicity, and physical and fertility constraints, in agricultural soils. They show that with careful selection of ash type and methods and rates of application, mutually compatible with the soil and crop type, the often reported phytotoxicity due to high concentrations of certain trace metals can be avoided while maintaining the quality of produce and minimizing risk to the environment. Specific examples are presented to demonstrate where it is economical to use fly ash as a low-cost alternative to certain fertilizers and liming materials on farms. The authors also propose criteria for the selection of ash and for regulatory parameters that would ensure the safe and routine utilization of ash in plant production systems.

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“…Paul used the Mine Water Leaching Procedure (MWLP) (Ziemkiewicz et al, 2003a(Ziemkiewicz et al, , 2003b as laboratory leaching method. This study attempts field verification of the results of a laboratory leaching procedure that uses mine water to sequentially leach coal ash.…”

Section: Batch Leaching Testmentioning

confidence: 99%

Suitability of leaching test methods for fly ash and slag: A review

Tiwari

Bajpai

Dewangan

et al. 2015

Journal of Radiation Research and Applied Sciences

155

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Fly ashHeavy metals Leaching Leachate Slag a b s t r a c t Fly ash and slag leachate pollution can be of great environmental concern due to generation of these wastes in huge quantities from their respective industrial units, mainly coalbased thermal power plants and iron and steel plants. For simulation of natural leaching in laboratory, various leaching methods are available, but selection of a method that can exactly simulate the real-life scenario for accurate estimation of various pollutants is challenging; particularly, the heavy metals present and impact due to reuse or disposal of these wastes. For choosing the most suitable leaching method according to specific situation, one must primarily consider the chemical and physical properties of wastes, the composition of the source, age of waste disposal, and the climatic conditions of the disposal area. Since these factors may not be specified, a variety of leaching methods with relevant equipment have been proposed by researchers; that are based on their required information to particular conditions in absence of a prescribed protocol and non standardization of equipment. The present review is an attempt to investigate the suitable leaching method for coal fly ash and slag.

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The Mine Water Leaching Procedure: Evaluating the Environmental Risk of Backfilling Mines with Coal Ash

Cited by 9 publications

References 6 publications

Strontium Isotope Study of Coal Utilization By-Products Interacting with Environmental Waters

Strontium Isotope Study of Coal Utilization By-Products Interacting with Environmental Waters

Application of Coal Fly Ash in Agriculture: A Strategic Perspective

Suitability of leaching test methods for fly ash and slag: A review

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