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Jun 08, 2021However, deep-sea mining comes with its own set of environmental concerns. The possible impacts of sediment plumes from mining operations on benthic ecosystems and filter-feeding organisms are not well understood, but there is a risk that such plumes could introduce heavy metals into

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Contaminants in Fish and Wildlife of Lynx Lake, Arizona

Abandoned mining operations in the Lynx Creek watershed above Lynx Lake southeast of Prescott, Arizona polluted fish and wildlife with arsenic, cadmium, copper, lead, manganese, and zinc. Lynx Lake was created by the Arizona Game and Fish Department (AGFD) in the 1960s and receives water solely from the Lynx Creek watershed.

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Arsenic: 7. What are the effects of arsenic on human health?

7.2 What other health problems can arsenic cause? Soluble inorganic arsenic can have immediate toxic effects. Ingestion of large amounts can lead to gastrointestinal symptoms such as severe vomiting, disturbances of the blood and circulation, damage to the nervous system, and eventually death.When not deadly, such large doses may reduce blood cell production, break up red blood cells in the

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Trophic transfer of arsenic and antimony in a freshwater

The distribution of arsenic and antimony discharges related to a past mining activity in the Bravona River and its tributary, the Presa River, was investigated. We determined levels of arsenic and antimony in the water and the biota (bryophytes, benthic macroinvertebrates and fish), along a pollution gradient.

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Researchers use Biochar to treat arsenic from mine waste

Jul 23, 2021Researchers used synchrotron light to determine that plant waste could be an ideal, cost-effective method for preventing arsenic in mine waste from polluting our water. The mining industry plays a key role in the North American economy and the

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The Impacts of Legacy Mining Operation on Inorganic

investigate the arsenic transfers and arsenic species accumulation in freshwater food webs near large legacy mining operations in Yellowknife, and (2) to assess the long-term health risk of inorganic arsenic exposure from the consumption of fish in Yellowknife among the general residents and the Yellowknives Dene First Nation.

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Speciation and toxicity of arsenic in mining

Jul 27, 2021X-ray absorption near edge structure (XANES) spectra reveal similar arsenic speciation for all sediments within the studied lakes. Bioaccessibility tests, which in this study were used to approximate the solubility and availability of arsenic to benthic organisms, indicate moderate bioaccessibility of arsenic in sediments (7.9-35%).

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Arsenic in Drinking Water

Arsenic is ubiquitous in nature and is commonly found in drinking water sources in California. The Division of Water Quality's GAMA Program, in its Groundwater Information Sheet for Arsenic (PDF), has a map of arsenic detection, based on monitoring information from DDW's water quality monitoring database. As of August 2021, 947 drinking water

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EurekAlert! Science News Releases

In 2021, the use of arsenic compounds in wood products was banned, but arsenic still reaches ground and water systems due to mining. This happens because the ground and bedrock in certain parts of

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Concentrations of Metals Associated with Mining Waste in

Feb 01, 1998Arsenic, Cd, Cu, Pb, Hg, and Zn were measured in sediments, biofilm, benthic macroinvertebrates, and fish from the Coeur d'Alene (CDA) River to characterize the pathway of metals transfer between these components. Metals enter the CDA Basin via tributaries where mining activities have occurred. In general, the ranking of food-web components from the greatest to smallest

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Why gold loves arsenic

Jul 08, 2021They found that when the minerals are enriched with arsenic, gold can enter mineral structural sites by directly binding to arsenic, forming, chemically speaking, Au (2+) and As (1

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Science of the Total Environment

To determine impact from coal mining, or indeed any anthropo-genic activities, the first step is often an examination of historical and current arsenic concentrations, and comparisons to background sediment arsenic concentrations, which in Canada are generally low (up to about 10 mgkg−1)(CCME, 1999). Comparisons to guideline

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Seasonal Temperature Oscillations Drive Contrasting

Oct 06, 2021Arsenic (As) and antimony (Sb) speciation and mobility in river systems can be influenced by the redox conditions of benthic and hyporheic zone sediments. However, our understanding of how temperature fluctuations influence riverine As and Sb mobility over diel and seasonal time frames, via moderation of sediment redox conditions, is poorly

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Environmental Health Mission Area

Kuwabara, J.S., 1992, Associations between benthic flora and diel changes in dissolved arsenic, phosphorus, and related physico-chemical parameters: Journal of the North American Benthological Society, v. 11, p. 218-228.

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Arsenic poisoning

Arsenic poisoning is a medical condition that occurs due to elevated levels of arsenic in the body. If arsenic poisoning occurs over a brief period of time, symptoms may include vomiting, abdominal pain, encephalopathy, and watery diarrhea that contains blood. Long-term exposure can result in thickening of the skin, darker skin, abdominal pain, diarrhea, heart disease, numbness, and cancer.

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Assessment of water quality contaminated with arsenic

The release of such contaminants as metals into aquatic environment and its accumulation in sediment is a great concern due to the potential effect to the whole ecosystem. Water biocoenosis can change completely with the introduction metals into the

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Mercury and arsenic in Victorian waters: a legacy of

1.1 Mercury, arsenic, and gold mining Mercury is found in various forms on earth and is released into the biosphere through a range of natural and anthropogenic processes. Natural sources of mercury include weathering of mercury-containing rock, volcanic eruptions, and bush fires.

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Best place to find Arsenic? :: Elite Dangerous General

May 31, 2021Inara lists Arsenic as obtainable through mining but I spent 3 hours in a Pristine Metallic ring and didn't find a single ton. Was I in the wrong type of planetary ring? Inara also says it can be found through surface mining with an SRV, but what planets are a good source of arsenic? I tried mining some barnacles but also didn't find arsenic. FYI: The Pristine Metallic turned out ot be a great

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Arsenic in benthic bivalves of San Francisco Bay and the

Nov 01, 1990Arsenic concentrations were determined in fine-grained, oxidized, surface sediments and in two benthic bivalves, Corbicula sp. and Macoma balthica, within San Francisco Bay, the Sacramento/San Joaquin River Delta, and selected rivers not influenced by urban or industrial activity.Arsenic concentrations in all samples were characteristic of values reported for

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Arsenic bioaccumulation in subarctic fishes of a mine

Aug 23, 2021A subarctic fish community in mine-impacted Yellowknife Bay (Great Slave Lake, Northwest Territories, Canada) was investigated for biological and ecological processes controlling arsenic bioaccumulation. Total concentrations of arsenic, antimony, and metals were measured in over 400 fishes representing 13 species, and primary producers and consumers were included to

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Ten things you probably didn't know about Cornish mining

A lot of arsenic was produced here. In the 1870s, a handful of mines in Cornwall and Devon produced over half the world's arsenic. It was a by-product of tin and copper processing and was mainly used in paint, weedkillers and insecticide. It was condensed and collected in long flues or labyrinths, like the one in this photo at Botallack.

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Kensington Gold Project NPDES Permit AK

4.0 Benthic InvertebratesSolid sample analysis of metals arsenic, cadmium, lead and selenium was carried out using method 6020, inductivity-coupled plasma-mass spectrometry (ICP-MS) and mercury was determined by method 7471A, manual cold-vapor technique. Table 3 summarizes metal

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Why gold loves arsenic

The association is caused by an atomic-scale attraction between gold and arsenic and the marriage is arranged by the structure of certain minerals They found that when the minerals are enriched with arsenic, gold can enter mineral structural sites by directly binding to arsenic, forming, chemically speaking, Au(2+) and As(1-) bonds.

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Benthic foraminifera (Protista) as indicators of metal

Southwest England has been, from Roman times, an important mining area supplying a range of important metals, including copper, tin, tungsten, arsenic, zinc, silver, etc. This mining activity virtually disappeared in the twentieth century, although one tungsten mine near Plymouth has recently re-opened. Large areas of Cornwall and West Devon are now inscribed as the 'Cornish Mining World

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Chapter 6.1 Arsenic

Inhalation exposure to arsenic can also take place during production of gallium arsenide in the microelectronics industry (17), demolition of oil-fired boilers (18) and metal ore mining (19). Drinking-water Drinking-water may contribute significantly to oral intake in regions where there are high arsenic

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Arsenic Factsheet

Arsenic Factsheet. Arsenic, a naturally occurring element, can combine with either inorganic or organic substances to form many different compounds. Inorganic arsenic compounds are in soils, sediments, and groundwater. These compounds occur either naturally, or as a result of mining, ore smelting, or when using arsenic for industrial purposes.

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Recovery of a mining

Abstract. This paper presents a 30+ year record of changes in benthic macroinvertebrate communities and fish populations associated with improving water quality in mining-influenced streams. Panther Creek, a tributary to the Salmon River in central Idaho, USA suffered intensive damage from mining and milling operations at the Blackbird Mine that released copper (Cu), arsenic (As), and cobalt

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The spatial distribution and source of arsenic, copper

Benthic invertebrates living within the area have adapted to be metal tolerant, and it is likely that the dominant source of bioavailable metals is a result of alteration of the particulate mine waste present within the intertidal and subtidal sediments. KW - arsenic. KW - contamination. KW - copper. KW - Cornwall. KW - UK. KW - estuaries. KW - tin

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Marine pollution

Marine pollution occurs when substances used or spread by humans, such as industrial, agricultural and residential waste, particles, noise, excess carbon dioxide or invasive organisms enter the ocean and cause harmful effects there. Since most inputs come from land, either via the rivers, sewage or the atmosphere, it means that continental shelves are more vulnerable to pollution.

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Alternative Methods for the Evaluation of Bioavailability

Arsenic RBA Study U.S. EPA Grant to Conduct Study DTSC applied for a Brownfields Training, Research and Technical Assistance Grant in 2021. DTSC awarded a grant to quantify the risk of arsenic found in mine-scarred lands, comparing in vivo and in vitro toxicity testing for different geological forms of arsenic by U.S. EPA .

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Biological Effects of Mining Wastes in the Northwest

mine effluent discharge. Arsenic, copper, nickel and lead in Ro Hum Lake were above background. Levels in the Camsell River above and below the lake outlet did not differ significantly. Benthic organisms along the Giant Mine effluent route (Baker Creek) were absent, indicating a high degree of pollution. Analyses

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Seasonal and Interannual Mobility of Arsenic in a Lake

Mar 01, 2021Indeed, benthic dissolved As fluxes in 1999 ranged from 179 to 380 μg cm-2 year-1, representing ∼33−60% of the water column burden. The relatively recent importance of sedimentary arsenic sources is suggested to reflect changes to sediment redox conditions associated with a postulated increase in lake primary productivity.

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