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Selenium, a toxic element that causes reproductive failure and deformities in fish and other forms of aquatic life, is discharged from many surface coal-mining operations across Appalachia. At very high levels, selenium can pose a risk to human health, causing hair and fingernail loss, kidney and liver damage, and damage to the nervous and ...
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Canadian investigators found the mining company discharged hazardous amounts of selenium and calcite into the Fording River from two coal mines in …
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Like Laing, members of the group are looking at a wide range of issues — from the 1976 coal policy to how selenium is released by coal mining and seeps into waterways. "You start following the thread and the thread starts to take you down a path that starts to terrify you," said Lambright.
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Of course, if selenium regulations are strictly enforced, it will be in the coal companies' interest to have an accurate assessment of the potential for selenium issues before they arise. It took lawsuits to force the West ia Department of Environmental Protection to recognize the need for selenium limits, and it took more legal action ...
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Coal mining releases selenium, an element which in large amounts is toxic to wildlife and humans. Reports on selenium concentrations in area waterways have levels at the maximum or …
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The selenium comes from the Elk Valley Mines, which extract metallurgical coal necessary for the manufacturing of steel by applying a "cross-valley fill" technique [1]. The rock is first scraped from the surface of the mountainside after which the coal is separated from the rest of the material, which becomes waste [1].
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open-pit coal mining has increased levels of selenium (Se), nitrogen (N) compounds, calcium (Ca), and sulfate (SO 42-) into the Fording River and Elk River; most of which are released from waste rock overburden and mineral oxidation (Teck, 2013). Krahn (2014) has shown that the significant deposits of Ca, N, and other compounds
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Investigation of selenium and arsenic in coal-mining associated rocks and sediments using ultrasonic and sequential extractions techniques. Innocent Pumure . Ultrasound extraction was used to compare the accelerated release rates of arsenic and selenium from pulverized rocks associated with mountain-top removal/valley fill method of coal mining.
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Selenium (Se) concentrations in surface water downstream of surface mining operations have been reported at levels in excess of water quality guidelines for the protection of wildlife. Previous research in surface mining environments has focused on downstream water quality impacts, yet little is known about the fundamental controls on Se loading.
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A Canadian coal-mining giant is fighting new American environmental rules that tighten restrictions on the release of a contaminant toxic to fish. On Aug. 13, Teck Resources petitioned Montana to rescind a rule brought in last fall that dramatically cuts acceptable levels of selenium in Lake Koocanusa, a reservoir crossing the U.S.-Canada ...
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surface mining accounts for approximately 40% of the over 8 billion tonnes of annual global coal production (World Coal Institute 2005). Surface mining is a process by which shallow coal seams are accessed through the removal and relocation of overburden rock using explosives and large mechanical equipment. Canada's largest coal producers are
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Selenium's coal mining impact on the environment. Steve @steve. 174 Posts #1 · October 23, 2020, 4:57 pm The Southern Alberta Group for Environment (SAGE) is a leading voice for a healthy and environmentally sustainable community. In an article about coal mining, it ...
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TAGS: insects mountaintop removal coal mining Selenium Water Pollution. Advocacy groups sue multiple coal facilities for water violations. By | August 6, 2019. CONTACTS: Erin Savage, Appalachian Voices Central Appalachian Program Manager, [email protected], 206-769-8286 August 7, 2019 Charleston, W.Va.
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Selenium is a naturally-occurring element that is present in certain rocks, soil, coal, and oil. Runoff, wastewater and emissions from mining operations, agricultural activities, power generation, and oil refining can mobilize and redistribute selenium throughout the environment. Selenium is used industrially as a glass additive and as a ...
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The concerns for selenium (Se) toxicity problems became a major issue to the coal mining industry in the western United States during the 1970s. Problems with Se toxicity in aquatic ecosystems led to a great amount of speculation with regard to Se levels found in …
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Selenium is a chemical element that is found in coal in small amounts. The potential for environmental problems begins when coal-bearing strata are exposed to air and water during the mining process, and when coal is washed prior to transport and distribution.
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He was investigating selenium, a naturally occurring element associated with coal mines that is healthy in small doses but toxic in excess. Kneteman's study looked at what levels of selenium were normal for animals such as bighorns, deer, elk and caribou by considering 85 different herds from across North America.
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The destructive consequences of selenium pollution are well documented in North America. In the 1970s, agricultural runoff carried high selenium loads into a reservoir in California's San Joaquin Valley, causing deformities in fish, reptiles, and birds. In the early 2000s, a vast mountaintop removal mining operation in West ia wrecked ecosystems in the Mud River.
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5 North Coal is developing the Michel coal project, an all-new mine in British Columbia that is expected to have a 1400-hectare footprint and that, once in full production, should generate 2 million ...
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5.2.1 Coal mining. As of November, 2016, 8 coal mining facilities reported releases to the NPRI of 13 360 kg of selenium to water in 2014. These facilities also reported the on-site disposal of 28 802 kg of selenium; this data includes selenium contained in tailing products and coarse coal rejects (National Pollutant Release Inventory, 2014).
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The selenium management review will complement the work of the committee, said Nixon. It provides "an avenue for Albertans who are participating in the coal consultation process to actually ...
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Selenium (Se) is necessary for several physiological functions in the human body; however, high concentrations of this element in coal mining areas raise the possibility of Se-related health risks. Children are much more vulnerable and at risk to environmental hazards than adults. The largest coal m …
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Selenium, a relatively rare element with diverse uses, is widely distributed within Earth's crust, but it does not occur in concentrations high enough to justify mining solely for its recovery. Selenium is recovered as a byproduct of nonferrous metal ore processing, principally from the anode slimes associated with electrolytic refining of ...
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Coal mining releases selenium, an element which in large amounts is toxic to wildlife and humans. Reports on selenium concentrations in area waterways have levels at the maximum or …
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Selenium is a slippery, multi-headed problem for mining. For starters, any technology has to treat large volumes of water to remove tiny traces of selenium. Any given wastewater can contain various selenium species with different solubility, toxicity and oxidization states that react differently to treatments and water temperature, and compete ...
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Coal is naturally enriched in trace elements, including mercury (Hg) and selenium (Se). Alkaline mine drainage from mountaintop mining valley fill (MTM-VF)—the dominant form of surface coal mining in Appalachia, USA—releases large quantities of Se into streams draining mined catchments, resulting in elevated bioaccumulation of Se in aquatic and riparian organisms. Yet, the release of Hg ...
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Numerous groups that called for the federal review raised concerns about increased selenium pollution from the mining project. Now environmental groups are pushing for B.C. to establish the more stringent 0.8 parts per billion selenium limit before Castle or other proposed coal mining projects proceed further through the review process.
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Because valley fills remain in place even after all mining is complete, selenium treatment liability is a problem not only for active coal mines, but also for the owners of so-called "reclaimed" mines. The Sierra Club and its allies have now begun filing lawsuits seeking to compel corporate landowners -- which profited from leasing their land ...
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2 Researchers at Rice University and the South Dakota School of Mines and Technology developed a sulfur and selenium insulator that works as a …
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Selenium release to the environment during coal burning for power generation can be direct during combustion or indirect from disposal of solid combustion waste (i.e., fly ash). Large-scale land disturbance is associated with mountaintop coal mining and waste …
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In the coal mining industry today, selenium, in its many forms, is gaining attention. New regulations covering selenium discharge are either in place or being developed. It has been said that handling selenium wastes will increasingly become a limiting factor on the ability of the coal mining industry to grow. While a number of physical/chemical
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Selenium is a naturally occurring chemical element in coal that can be released during the mining process and find its way into nearby aquatic habitats. Selenium in raw coal and overburden is leached out when these materials are exposed to air and water, and the leachate can pose a significant environmental hazard (Lemly 1985a).
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