Coal ash - Revision history

Jmdonev: 1 revision imported

2021-09-27T00:03:16Z

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energy>Ethan.boechler at 16:39, 13 September 2021

2021-09-13T16:39:49Z

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	[[Category:Done 2018-08-03]]		[[Category:Done 2018-08-03]]
			[[Category:Translated to French]]
			[[fr:Cendres de charbon]]
	[[File:033736_11e533f0.jpg\|360px\|thumb\|right\|Figure 1. Ash lagoon used to store fly ash. This picture shows the deposits being quarried and sprinklers for keeping the ash wet, preventing it from flying away.<ref>Richard Webb. (July 13, 2015). ''Ash Lagoon'' [Online]. Available: http://www.geograph.org.uk/photo/33736</ref> ]]		[[File:033736_11e533f0.jpg\|360px\|thumb\|right\|Figure 1. Ash lagoon used to store fly ash. This picture shows the deposits being quarried and sprinklers for keeping the ash wet, preventing it from flying away.<ref>Richard Webb. (July 13, 2015). ''Ash Lagoon'' [Online]. Available: http://www.geograph.org.uk/photo/33736</ref> ]]
	<onlyinclude>'''Coal ash''', sometimes called '''coal combustion residuals''', is produced from the burning of [[coal]] in [[coal-fired power plant]]s.</onlyinclude> This ash contains a number of byproducts that are produced from the burning of coal including:<ref name="RE1">EPA. (July 10, 2015). ''Coal Ash Basics'' [Online]. Available: http://www2.epa.gov/coalash/coal-ash-basics</ref>		<onlyinclude>'''Coal ash''', sometimes called '''coal combustion residuals''', is produced from the burning of [[coal]] in [[coal-fired power plant]]s.</onlyinclude> This ash contains a number of byproducts that are produced from the burning of coal including:<ref name="RE1">EPA. (July 10, 2015). ''Coal Ash Basics'' [Online]. Available: http://www2.epa.gov/coalash/coal-ash-basics</ref>

Jmdonev: 1 revision imported

2018-09-03T22:23:34Z

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energy>Jmdonev at 22:27, 31 July 2018

2018-07-31T22:27:52Z

← Older revision		Revision as of 22:27, 31 July 2018
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	[[Category:Done ~~2015~~-07-24]]		[[Category:Done 2018-08-03]]
	[[File:033736_11e533f0.jpg\|360px\|thumb\|right\|Figure 1. Ash lagoon used to store fly ash. This picture shows the deposits being quarried and sprinklers for keeping the ash wet, preventing it from flying away.<ref>Richard Webb. (July 13, 2015). ''Ash Lagoon'' [Online]. Available: http://www.geograph.org.uk/photo/33736</ref> ]]		[[File:033736_11e533f0.jpg\|360px\|thumb\|right\|Figure 1. Ash lagoon used to store fly ash. This picture shows the deposits being quarried and sprinklers for keeping the ash wet, preventing it from flying away.<ref>Richard Webb. (July 13, 2015). ''Ash Lagoon'' [Online]. Available: http://www.geograph.org.uk/photo/33736</ref> ]]
	<onlyinclude>'''Coal ash''', sometimes called '''coal combustion residuals''', is produced from the burning of [[coal]] in [[coal-fired power plant]]s.</onlyinclude> This ash contains a number of byproducts that are produced from the burning of coal including:<ref name="RE1">EPA. (July 10, 2015). ''Coal Ash Basics'' [Online]. Available: http://www2.epa.gov/coalash/coal-ash-basics</ref>		<onlyinclude>'''Coal ash''', sometimes called '''coal combustion residuals''', is produced from the burning of [[coal]] in [[coal-fired power plant]]s.</onlyinclude> This ash contains a number of byproducts that are produced from the burning of coal including:<ref name="RE1">EPA. (July 10, 2015). ''Coal Ash Basics'' [Online]. Available: http://www2.epa.gov/coalash/coal-ash-basics</ref>
	* '''[[Fly ash\|Fly Ash]]''': A fine, powdery silica material created when fine coal is burned.		* '''[[Fly ash\|Fly Ash]]''': A fine, powdery silica material created when fine coal (pulverized coal) is burned.
	* '''[[Bottom ash\|Bottom Ash]]''': A more course ash particle that forms at the bottom of a coal furnace as it is too large to be pulled out through smoke stacks.		* '''[[Bottom ash\|Bottom Ash]]''': A more course ash particle that forms at the bottom of a coal furnace as it is too large to be pulled out through smoke stacks.
	* '''[[Boiler slag\|Boiler Slag]]''': Molten bottom ash that turns into pellets when cooled with [[water]].		* '''[[Boiler slag\|Boiler Slag]]''': Molten bottom ash that turns into pellets when cooled with [[water]].
	* '''[[Flue gas desulfurization material\|Flue Gas Desulfurization Material]]''': A material leftover from the removal of [[SOx\|sulfur dioxide]] that can be a wet sludge or a powdered material mixed with assorted sulfates.		* '''[[Flue gas desulfurization material\|Flue Gas Desulfurization Material]]''': A material leftover from the removal of [[SOx\|sulfur dioxide]] that can be a wet sludge or a powdered material mixed with assorted sulfates.

	Coal ash is one of the largest forms of waste generated in the United States and in many countries around the ~~world - with~~ more than 100 million [[tonne]]s of coal ash produced in 2012 in America alone.<ref name="RE1"/> The fact that there is so much coal ash is an issue, and the content of the coal ash is also concerning. Coal ash contains [[lead]], [[arsenic]], [[mercury]], [[cadmium]], and [[uranium]].<ref name="RE2">Ed Dodge. (July 13, 2015). ''Can Coal Fly Ash Waste Be Put to Good Use?'' [Online]. Available: http://breakingenergy.com/2014/02/18/can-coal-fly-ash-waste-be-put-to-good-use/</ref> Thus it is very harmful for coal ash to be released into the environment. Spills of coal ash can pollute waterways, ground water, drinking water, and the air. To address the risks involved in disposing coal ash, there have been rules set up for coal ash disposal.<ref name="RE1"/>

			<gallery caption= "Types of coal ash" mode=packed heights="200" width="400">
			File:flyash.jpg\|Figure 2. Fly ash.<ref name=pic>''Photo taken by a member of the Energy Education team.''</ref>
			File:bottomashfinal.jpg\|Figure 3. Bottom ash.<ref name=pic/>
			File:boilerslag-scoop600.jpg\|Figure 4. Boiler slag.<ref>American Coal Ash Association. (September 19, 2015). ''Boiler Slag'' [Online]. Available: https://www.acaa-usa.org/About-Coal-Ash/What-are-CCPs/Boiler-Slag</ref>
			</gallery>

			Coal ash is one of the largest forms of waste generated in the United States and in many countries around the world—with more than 100 million [[tonne]]s of coal ash produced in 2012 in America alone.<ref name="RE1"/> The fact that there is so much coal ash is an issue, and the content of the coal ash is also concerning. Coal ash contains [[lead]], [[arsenic]], [[mercury]], [[cadmium]], and [[uranium]].<ref name="RE2">Ed Dodge. (July 13, 2015). ''Can Coal Fly Ash Waste Be Put to Good Use?'' [Online]. Available: http://breakingenergy.com/2014/02/18/can-coal-fly-ash-waste-be-put-to-good-use/</ref> Thus it is very harmful for coal ash to be released into the environment. Spills of coal ash can pollute waterways, ground water, drinking water, and the air. To address the risks involved in disposing coal ash, there have been rules set up for coal ash disposal.<ref name="RE1"/>

	==Disposal and Recycling==		==Disposal and Recycling==
	~~Because~~ the environmental impact of coal ash is significant, there is dispute about what method is best to deal with the waste. Some power plants dispose of coal ash in surface impoundments or in landfills, while others get rid of the ash by putting it into a waterway. A small amount of dry coal ash is sometimes put back into the abandoned mine.<ref>Clean Water Action. (July 21, 2015). ''Managing Coal Ash'' [Online]. Available: http://cleanwateraction.org/page/managing-coal-ash</ref> It can also be recycled into several different materials. Fly ash has long been used as an additive in cement, grout, or concrete or to stabilize road beds as a fill material.<ref name="RE2"/> Bottom ash is used to stabilize as a fill or control snow on roads. About 43% of the fly ash in the USA is recycled.<ref name="RE2"/> Re-purposing this coal ash reduces [[greenhouse gas]] [[emission]]s ~~and reduced~~ the space ~~taken~~ up in landfills ~~by this ash~~. Greenhouse gas emissions are reduced because concrete and brick making are significant contributors to greenhouse gas emissions, and thus using fly ash to reduce the amount of brick or concrete produced helps reduce these emissions. There are also economic benefits of re-purposing coal ash. This includes reduced costs associated with its disposal, increased revenue from the sale of new coal ash products, and savings from using coal ash instead of other more costly materials. Although re-purposing this ash reduces environmental effects, there are critics who say that the use of fly ash in building materials is dangerous, as there could be air contamination from leaching chemicals.<ref name="RE2"/>		Since the environmental impact of coal ash is significant, there is dispute about what method is best to deal with the waste. Some power plants dispose of coal ash in surface impoundments or in landfills, while others get rid of the ash by putting it into a waterway. A small amount of dry coal ash is sometimes put back into the abandoned mine.<ref>Clean Water Action. (July 21, 2015). ''Managing Coal Ash'' [Online]. Available: http://cleanwateraction.org/page/managing-coal-ash</ref> It can also be recycled into several different materials. Fly ash has long been used as an additive in cement, grout, or concrete. In addition, it's used to stabilize road beds as a fill material.<ref name="RE2"/> Bottom ash is also used to stabilize as a fill or control the snow on roads. About 43% of the fly ash in the USA is recycled.<ref name="RE2"/> Re-purposing this coal ash reduces [[greenhouse gas]] [[emission]]s by decreasing the space they would otherwise take up in landfills. Greenhouse gas emissions are reduced because concrete and brick making are significant contributors to greenhouse gas emissions, and thus using fly ash to reduce the amount of brick or concrete produced helps reduce these emissions. There are also economic benefits of re-purposing coal ash. This includes reduced costs associated with its disposal, increased [[revenue]] from the sale of new coal ash products, and savings from using coal ash instead of other more costly materials. Although re-purposing this ash reduces environmental effects, there are critics who say that the use of fly ash in building materials is dangerous, as there could be air contamination from leaching chemicals.<ref name="RE2"/>

			==For Further Reading==
			*[[Fly ash]]
			*[[Bottom ash]]
			*[[Boiler slag]]
			*[[Coal combustion residuals]]
			*[[Coal fired power plant]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:30:55Z

1 revision imported

← Older revision	Revision as of 21:30, 26 August 2015
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J.williams at 16:52, 12 August 2015

2015-08-12T16:52:54Z

New page

[[Category:Done 2015-07-24]]
[[File:033736_11e533f0.jpg|360px|thumb|right|Figure 1. Ash lagoon used to store fly ash. This picture shows the deposits being quarried and sprinklers for keeping the ash wet, preventing it from flying away.<ref>Richard Webb. (July 13, 2015). ''Ash Lagoon'' [Online]. Available: http://www.geograph.org.uk/photo/33736</ref> ]]
<onlyinclude>'''Coal ash''', sometimes called '''coal combustion residuals''', is produced from the burning of [[coal]] in [[coal-fired power plant]]s.</onlyinclude> This ash contains a number of byproducts that are produced from the burning of coal including:<ref name="RE1">EPA. (July 10, 2015). ''Coal Ash Basics'' [Online]. Available: http://www2.epa.gov/coalash/coal-ash-basics</ref>
* '''[[Fly ash|Fly Ash]]''': A fine, powdery silica material created when fine coal is burned.
* '''[[Bottom ash|Bottom Ash]]''': A more course ash particle that forms at the bottom of a coal furnace as it is too large to be pulled out through smoke stacks.
* '''[[Boiler slag|Boiler Slag]]''': Molten bottom ash that turns into pellets when cooled with [[water]].
* '''[[Flue gas desulfurization material|Flue Gas Desulfurization Material]]''': A material leftover from the removal of [[SOx|sulfur dioxide]] that can be a wet sludge or a powdered material mixed with assorted sulfates.

Coal ash is one of the largest forms of waste generated in the United States and in many countries around the world - with more than 100 million [[tonne]]s of coal ash produced in 2012 in America alone.<ref name="RE1"/> The fact that there is so much coal ash is an issue, and the content of the coal ash is also concerning. Coal ash contains [[lead]], [[arsenic]], [[mercury]], [[cadmium]], and [[uranium]].<ref name="RE2">Ed Dodge. (July 13, 2015). ''Can Coal Fly Ash Waste Be Put to Good Use?'' [Online]. Available: http://breakingenergy.com/2014/02/18/can-coal-fly-ash-waste-be-put-to-good-use/</ref> Thus it is very harmful for coal ash to be released into the environment. Spills of coal ash can pollute waterways, ground water, drinking water, and the air. To address the risks involved in disposing coal ash, there have been rules set up for coal ash disposal.<ref name="RE1"/>

==Disposal and Recycling==
Because the environmental impact of coal ash is significant, there is dispute about what method is best to deal with the waste. Some power plants dispose of coal ash in surface impoundments or in landfills, while others get rid of the ash by putting it into a waterway. A small amount of dry coal ash is sometimes put back into the abandoned mine.<ref>Clean Water Action. (July 21, 2015). ''Managing Coal Ash'' [Online]. Available: http://cleanwateraction.org/page/managing-coal-ash</ref> It can also be recycled into several different materials. Fly ash has long been used as an additive in cement, grout, or concrete or to stabilize road beds as a fill material.<ref name="RE2"/> Bottom ash is used to stabilize as a fill or control snow on roads. About 43% of the fly ash in the USA is recycled.<ref name="RE2"/> Re-purposing this coal ash reduces [[greenhouse gas]] [[emission]]s and reduced the space taken up in landfills by this ash. Greenhouse gas emissions are reduced because concrete and brick making are significant contributors to greenhouse gas emissions, and thus using fly ash to reduce the amount of brick or concrete produced helps reduce these emissions. There are also economic benefits of re-purposing coal ash. This includes reduced costs associated with its disposal, increased revenue from the sale of new coal ash products, and savings from using coal ash instead of other more costly materials. Although re-purposing this ash reduces environmental effects, there are critics who say that the use of fly ash in building materials is dangerous, as there could be air contamination from leaching chemicals.<ref name="RE2"/>

==References==
{{reflist}}
[[Category:Uploaded]]