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Topic: Arsenic

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In the News (Sun 26 May 19)

  ATSDR - ToxFAQs™: Arsenic
Arsenic is a naturally occurring element widely distributed in the earth’s crust.
Arsenic in animals and plants combines with carbon and hydrogen to form organic arsenic compounds.
Organic arsenic compounds are used as pesticides, primarily on cotton fields and orchards.
www.atsdr.cdc.gov /tfacts2.html   (1149 words)

 Arsenic: Scientific Facts on Arsenic
Arsenic is generally present in sea-living animals at higher levels than in freshwater animals, or plants and animals that live on land.
Concentrations of the generally more toxic inorganic arsenic are highest in air close to industrial sources, in underground water in areas with natural geological contamination, and in soils or sediments near contamination sources.
Arsenic and arsenic compounds have been classified as carcinogenic to humans and guideline values for drinking-water have been set.
www.greenfacts.org /en/arsenic/index.htm   (1674 words)

 Safety and Health Topics: Arsenic
Arsenic occurs naturally in the environment as an element of the earth's crust.
Arsenic is combined with other elements such as oxygen, chlorine, and sulfur to form inorganic arsenic compounds.
Exposure to arsenic at low levels for extended periods of time can cause a discoloration of the skin and the appearance of small corns or warts.
www.osha.gov /SLTC/arsenic/index.html   (134 words)

  Chronic Arsenic Poisoning: History, Study and Remediation
That arsenic at low levels is safe seemed to be reinforced by animal studies that seemed to show that arsenic is beneficial (to animals) at low doses.
Professor McArthur of UC London argues: "It becomes increasingly clear that severe arsenic pollution of ground water in most alluvial aquifers worldwide is driven by the microbially-mediated metabolism of organic matter, with FeOOH acting as the source of oxygen: the oxide is reduced during the process and its sorbed arsenic is released to ground water.
Arsenic in groundwater: testing pollution mechanisms for sedimentary aquifers in Bangladesh, Their most recent paper is: "Natural organic matter in sedimentary basins and its relation to arsenic in anoxic ground water: the example of West Bengal and its worldwide implications," by J.M. McArthur and others is available at
phys4.harvard.edu /~wilson/arsenic/arsenic_project_introduction.html   (2691 words)

  Arsenic - Wikipedia, the free encyclopedia
Arsenic and its compounds are used as pesticides, herbicides, insecticides and various alloys.
As the symptoms of arsenic poisoning were somewhat ill-defined, it was frequently used for murder until the advent of the Marsh test, a sensitive chemical test for its presence.
The arsenic in the groundwater is of natural origin, and is released from the sediment into the groundwater due to the anoxic conditions of the subsurface.
en.wikipedia.org /wiki/Arsenic   (1560 words)

 Kids.Net.Au - Encyclopedia > Arsenic poisoning
There is a theory that Napoleon Bonaparte suffered from arsenic poisoning, and samples of his hair did show high levels of the element.
Even without contaminated wallpaper, there are many other routes by which he could have picked up arsenic: arsenic was used medicinally for centuries and, in fact, was used extensively to treat syphilis before penicillin was introduced; it was replaced for treating other conditions by sulfa drugs and then by antibiotics.
Arsenic was an ingredient in many tonics (or "patent medicines"), just as coca (unrefined cocaine) was an ingredient in Coca-Cola when it was introduced.
www.kids.net.au /encyclopedia-wiki/ar/Arsenic_poisoning   (276 words)

 New Page 1
Arsenic is widely distributed throughout the earth's crust and it is present in very small amounts in all living matter.
Arsenic can be absorbed from the gastrointestinal tract, and the extent of absorption depends on the form of arsenic.
Arsenic is a known human carcinogen and is classified as a Group I carcinogen by the U.S. Environmental Protection Agency and the International Agency for Research on Cancer.
www.chiefs-of-ontario.org /eagle/factsheet18.htm   (480 words)

 Arsenic Levels in Chicken Higher Than Expected
Although levels of arsenic in young chickens were higher than expected, this does not mean that people who eat chicken are at risk of consuming too much arsenic, Lasky told Reuters Health.
Arsenic is also found in some antibiotics approved for use in animals, so Lasky's team measured average arsenic concentrations in meat and poultry in the U.S. from 1994 to 2000.
Lasky said that people's concern about arsenic in chicken may depend on how much chicken they consume, as well as on their other sources of arsenic exposure, such as in their water supply or on the job.
www.environmentaldefence.ca /foodwatch/press/articles/20040130.htm   (434 words)

 CRCPress Periodic Table Online: Cadmium
Elemental arsenic occurs in two solid modifications: yellow, and gray or metallic, with specific gravities of 1.97, and 5.75, respectively.
It is found native, in the sulfides realgar and orpiment, as arsenides and sulfarsenides of heavy metals, as the oxide, and as arsenates.
Arsenic is also used in bronzing, pyrotechnics, and for hardening and improving the sphericity of shot.
www.chemnetbase.com /periodic_table/elements/arsenic.htm   (263 words)

 Dartmouth team studies arsenic effect
Natural arsenic contamination of drinking water supplies also is a problem in New Hampshire, which was known as the "arsenic state" in the 1800s when its mines met the nation's need for a chemical used in products as diverse as paint, pesticide and lead shot, in which it was a hardening agent.
The sinister value of a relatively large amount of arsenic — a lump the size of a pea is deadly — has been known since ancient times when some unscrupulous types rose to power and fortune by adding a dash of the colorless, odorless, tasteless substance to the food they fed their rivals.
It is the first-ever study of the effects of arsenic at levels between 5 ppb and 50 ppb and is viewed as important for establishing a scientifically-sound safe drinking water standard for arsenic.
www.nofluoride.com /union_leader_arsenic_dartmouth.htm   (710 words)

Evidence for a dose–response relationship between arsenic in drinking-water and risk for lung cancer was also observed in ecological studies in Taiwan and Argentina, in cohort studies in south-western and north-eastern Taiwan and Japan and in case–control studies in south-western Taiwan and Chile.
The recognition that arsenic was potentially carcinogenic arose from occurrences of skin cancer after ingestion of medicinal arsenic, arsenical pesticide residues and arsenic-contaminated drinking-water.
The 50% lethal dose of arsenic trioxide in mice by the oral route varies from 15 to 48 mg/kg bw, whereas the acute lethal dose in humans varies from 1 to 3 mg/kg bw.
www.inchem.org /documents/iarc/vol84/84-01-arsenic.html   (2374 words)

 Arsenic   (Site not responding. Last check: )
Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot.
The most important compounds are white arsenic, the sulfide, Paris green, calcium arsenate, and lead arsenate; the last three have been used as agricultural insecticides and poisons.
Arsenic is finding increasing uses as a doping agent in solid-state devices such as transistors.
www.scescape.net /~woods/elements/arsenic.html   (196 words)

Arsenic embalming began as a sanitary practice and a practical means to preserve the body until burial or for transport.
A common effect of arsenic ingestion is irritation of the digestive tract, leading to pain, nausea, vomiting, and diarrhea.
Direct dermal contact with arsenic compounds may result in mild to severe irritation of the skin (dermatitis), as well as irritation to the mucous membranes of the eyes, nose, and throat.
www.waterindustry.org /arsenic-3.htm   (2095 words)

 The Inside Story: Arsenic
When it suits their purposes politically or in the media, the chemical industry has acknowledged that arsenic is extremely toxic and even offered it up as a red herring to put regulators and independent scientists off the trail of other toxic substances.
Arsenic is one of the few compounds besides vinyl chloride that causes angiosarcoma, a good indicator of arsenic's potent cancer causing properties.
Yet when the industry was faced with regulations to curb arsenic exposure in the workplace and the environment, the industry attempted to belittle the dangers of arsenic, criticizing scientific studies that the industry itself had commissioned which linked arsenic to cancer.
www.chemicalindustryarchives.org /dirtysecrets/arsenic/1.asp   (737 words)

 Arsenic Fact Sheet
At low doses, arsenic is a "co-carcinogen," which means that it can work in concert with other cancer-causing agents (such as cigarette smoke) to cause cancer in human beings.
Arsenic is also a neurotoxin, and at high doses can cause tremors and death in most mammals and humans.
Arsenic can also be absorbed through the lungs as a vapor, which is known to occur in some industrial settings or when smoking arsenic-contaminated tobacco products.
www.iere.org /Vashon/As-factsheet.html   (641 words)

 RAIS: Arsenic (7440-38-2)
In tests on humans, absorption of the insoluble arsenic selenide appeared to be neglible as indicated by the absence of an increase in urinary arsenic excretion (Mappes, 1977).
Trivalent arsenic oxide and gallium arsenide were shown to cause pulmonary inflammation and hyperplasia in rats (Webb et al., 1986, 1987), and calcium arsenate caused lung lesions in hamsters; however, arsenic trioxide and arsenic trisulfide did not have such an effect (Pershagen et al., 1982).
(1985) exposed mice for 4 hr/day to an aerosol of arsenic trioxide (28.5 mg/m
rais.ornl.gov /tox/profiles/arsenic.shtml   (7393 words)

 arsenic - symptoms,diagnosis and treatment
Diagnosis of arsenic poisoning, especially from low doses of inorganic arsenic, the type found in CCA lumber, is not easy.
Arsenic poisoning is difficult to pin down because most of the arsenic leaves the body within three days of exposure.
Because most arsenic leaves your body within a few days, analysis of urine cannot detect if a person was exposed to arsenic in the past.
www.environmentalhealth.ca /summer02arsenic.html   (423 words)

 CEH: Arsenic in Playground Equipment Press Release
Arsenic, which is injected as a preservative and pesticide into almost all wood used outdoors, is an acute poisoning hazard but also a long-term cause of organ and skin cancer.
Arsenic is banned for all other pesticide uses, but wood treatment is exempt from federal pesticide laws.
Arsenic can be absorbed from the wood through direct contact, or after the poison leaches into the surrounding soil or groundwater.
www.cehca.org /pr052301_ars.htm   (498 words)

 high levels of arsenic
Fox said the number of water systems with arsenic levels approaching 50 micrograms per liter are relatively few, "affecting less than half of a percent of the U.S. population," and usually those that rely on groundwater.
The international standard for arsenic in tap water is 10 micrograms per liter, five times tougher than the U.S. requirement, which dates back to 1942 and has not been changed despite a 1974 directive from Congress to strengthen the standard.
Inorganic arsenic, the form most likely to cause cancer, occurs naturally in the earth and is released into groundwater that travels through rocks and soil.
www.waterindustry.org /Water-Facts/arsenic-8.htm   (596 words)

 NRDC: Arsenic in Drinking Water FAQ
According to a 1999 study by the National Academy of Sciences, arsenic in drinking water causes bladder, lung and skin cancer, and may cause kidney and liver cancer.
Arsenic is a natural element of the earth's crust.
Some systems may be able to reduce arsenic levels by cleaning up or changing the source of their water.
www.nrdc.org /water/drinking/qarsenic.asp   (1458 words)

 Do you need an arsenic water filter?
Arsenic water filters are an ideal way to remove arsenic from your drinking water.
Drastically reduces or effectively removes chlorine, lead, arsenic, barium, cadmium, chromium, selenium, mercury, iron and other metals that may be present in the water.
Arsenic filters with NSF certification will generally be of better quality than arsenic filters that have no certification at all.
www.home-water-filter-guide.com /arsenic-water-filter.html   (216 words)

 Arsenic - Frequently Asked Questions   (Site not responding. Last check: )
Arsenic is a naturally occurring substance in groundwater.
The inorganic form of arsenic is used to preserve wood; create, mine or treat metals; and is also added to some paints, dyes and soaps.
Arsenic is especially prevalent in the Western states and makes its way into the water supply as water percolates down through rock and soil.
www.cc.state.az.us /utility/water/arsenic-faqs.htm   (512 words)

Arsenic is worth studying because of its curious uses, and as an example of an element that stands with one foot in the metals camp, and one foot in the nonmetals camp.
Arsenic metal is easily made by heating the oxide with carbon (coke or charcoal) in a retort, and condensing the vapors.
Arsenic does not appear to be popular with today's murderers and assassins, but it was once very accessible in insecticides and rat poisons, or from your parish alchemist.
www.du.edu /~jcalvert/phys/arsenic.htm   (2983 words)

 Arsenic Poisoning in Bangladesh   (Site not responding. Last check: )
Arsenic is naturally occurring in pyrite bedrock underlying much of West Bengal.
Arsenic is a slow killer that accumulates in the body resulting in nails rotting, dark spots, bleeding sores, swelling, large warts and a form of gangrene.
No one knows what the best solution is to treat arsenic poisoning, a public awareness campaign has been launched to inform people of the dangers of arsenic and the benefits of good nutrition which could reduce the effects of the poison.
www.ozgreen.org.au /WWD/arsenic_poisoning_in_bangladesh.htm   (413 words)

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