3 edition of Levels of Arsenic and Selenium in the Great Lakes Region. found in the catalog.
Levels of Arsenic and Selenium in the Great Lakes Region.
Canada. Environment Canada. Inland Waters Directorate.
|Series||Scientific series (Canada. Inland Waters Directorate) -- 58|
|Contributions||Traversy, W.J., Goulden, P.D., Sheikh, Y.M.|
Thermo Fisher Scientific has produced an application note demonstrating the accurate determination of arsenic and selenium in sediments and rocks that contain elevated levels of rare earth elements using triple quadrupole ICP-MS. This is particularly so where the main source of food is local. Parts of the world with selenium-deficient soils include Finland, New Zealand, and some areas of China, Africa, and the US (Great Lakes region towards the New England states, and parts of the Atlantic Coast and Pacific Northwest).
Element Concentrations in Tree Swallows (Tachycineta bicolor) from the U.S. and Binational Great Lakes Areas of Concern Article in Archives of Environmental Contamination and Toxicology 76(3. Arsenic (As) and selenium (Se) are unusual metalloids as they both induce and cure cancer. They both cause carcinogenesis, pathology, cytotoxicity, and genotoxicity in humans, with reactive oxygen species playing an important role. While As induces adverse effects by decreasing DNA methylation and affecting protein 53 expression, Se induces Cited by:
Systematic Approach to Understanding Tree Swallow Health in the Great Lakes Region—Science to Inform Restoration. Four papers by USGS scientists document tree swallow (Tachycineta bicolor) chemical exposure, physiological responses, and reproductive success in the Great Lakes studies were designed to understand if there are health threats to swallows from contaminant . The following conclusions were reached from the experimental results: (a) The growth of the cell increased with an increase of arsenic(V) levels of the medium up to ppm, and the cell survived even at 10, ppm; (b) The arsenic bioaccumulation increased with an increase of the arsenic level. The maximum accumulation of arsenic was about.
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Levels of arsenic and selenium in the Great Lakes region. Burlington, Ont: Inland Waters Directorate, Ontario Region, Water Quality Branch. MLA Citation. Traversy, W. and Canada. Inland Waters Directorate. Levels of arsenic and selenium in the Great Lakes region / W.J. Traversy. selenium, fluorine, and arsenic in surficial materials in concentrations as low as ppm (part per million), 10 ppm, and 1 ppm, respectively.
The samples were collected and prepared for analysis in the same manner as reported earlier (Shacklette, Hamilton, and others, ) and were analyzed in sequence that was completely randomCited by: Stanley et al., Main and interactive effects of arsenic and selenium on mallard reproduction and duckling growth and survival.
Archives of Environmental Contamination and Toxicology, USEPA (Great Lakes), Great Lakes Water Quality initiative Criteria Documents for File Size: KB. The average concentrations of selenium ranged between ± to ± μg/L with a typical average of ± μg/L.
Table 3 shows average seasonal arsenic, antimony and selenium levels in groundwater. Arsenic was not detected during the wet season (0 μg/L), while only 17% of total sampled groundwater showed arsenic (± to Cited by: 3. inorganic forms of arsenic (As) are known to be toxic and carcinogenic to humans, and food and drink are a potential source of exposure .
To reduce the intake of inorganic arsenic from the diet, the U.S. Food and Drug Administration (FDA) proposed a new action level for inorganic arsenic in apple juice of 10 µg/L in [2,3].
In humans, when consumed at levels higher than about μm per day, selenium is neurotoxin and a carcinogen and can cause diabetes.
Excess selenium in the environment has been linked to other fossil fuels, with problems recorded close to coal storage facilities, coal burning industries and oil : Joe Bauwens. In sediment, arsenic concentrations range from 5 to mg/kg. The higher levels are found in areas contaminated by mining and smelting.
In soil, concentrations range from 1 to 40 mg/kg, usually averaging around 5 mg/kg. In drinking-water supplies, arsenic poses a problem because it is toxic at low levels and is a known carcinogen.
Inthe USEPA lowered the MCL for arsenic in public-water supplies to 10 micrograms per liter (µg/L) from 50 µg/L. Because selenium levels can vary greatly within an area, testing the soil's selenium content is recommended.
Soil is considered "selenium deficient" when there is less than mg of selenium per kg of soil. Selenium has a very narrow margin of safety. Goats require parts per million of selenium, and the toxic level is 3 ppm. Some symptoms of selenium deficiency are identical to Author: Goldenwood Farm.
Additional Physical Format: Online version: Levels of arsenic and selenium in the Great Lakes region. Burlington, Ont.: Inland Waters Directorate, Ontario Region, The region includes lakes with arsenic-contaminated waters that display different redox behaviors, ranging from seasonally stratified and anoxic to well-mixed and oxygenated.
Redox refers to a transfer of oxygen molecules, in which some elements are gaining oxygen (oxidizing) and others are. Ingesting very high levels of arsenic can result in death. Exposure to lower levels can cause nausea and vomiting, decreased production of red and white blood cells, abnormal heart rhythm, damage to blood vessels, and a sensation of “pins and needles” in hands and feet.
Ingesting or breathing low levels of inorganic arsenic for a. Arsenic (As) is ubiquitous in the environment and it exists in four oxidation states: arsenate (+ 5), arsenite (+ 3), elemental arsenic (0) and arsine (− 3).
It is released to the environment through both natural processes and anthropogenic activities. Arsenic is widely distributed in the earth, ranking 20th in abundance in the earth’s by: indicated elevated concentrations of selenium and arsenic were present. Combined these results indicate that the area around Hicks Canyon, Round Canyon and Tomato Springs are the original source region of selenium and arsenic within the San Diego Creek Newport Bay watershed and the selenium and arsenic now observed in the heart of the.
For this study, mercury, arsenic and selenium concentrations were analyzed in fish tissue between Shortts Lake (Colchester County), which had low groundwater and sediment arsenic levels,and Morris Lake (Halifax County), which had high groundwater and sediment arsenic levels.
Study of potential harmful elements (arsenic, mercury and selenium) in surface sediments from Serbian rivers and artificial lakes Article (PDF Available) in Journal of Geochemical Exploration Many communities may have high levels of arsenic in their drinking water, particularly from private wells, because of contamination or as a result of the geology of the area.
The north central region and the western region of the United States have the highest arsenic levels in surface water and groundwater sources, respectively.
Comparing Mercury, Arsenic, and Selenium in Several Fish Species from Two Nova Scotia Lakes By Jocelyn Kickbush A Thesis Submitted to Saint Mary’s University, Halifax Nova Scotia In Partial Fulfillment of the Requirements for the Degree of Honours in.
Acidified lakes (pH lakes (>20 ng. l-1). The correlation between pH and bioactive Se was positive (r ~ ; n = 7). The ecological importance of Se is suggested for some species of by: Resident of Bangladesh in an arsenic-affected region (Chandpur) Age between 12 and 55; Exposure to arsenic in home drinking water greater than 50 ug/L.
Arsenical melanosis on the torso confirmed by epiluminescence microscopy; Exclusion Criteria: Recent history or plans to consume selenium-containing supplements. One of the biggest challenges now facing the Great Lakes is pollution from plastic.
According to Science Daily, research carried out by the Rochester Institute of Technology, found that virtua metric tons or 22 million pounds of plastic debris enter the Great Lakes every put this in a more tangible format, the equivalent of Olympic-sized pools full of plastic bottles is.water or decrease in arsenic level in the drinking water source is essential for overall development.
KEY WORDS: Arsenicosis, acute toxicity, chronic toxicity, melanosis, keratosis, cancer, ground water, remedy. I. INTRODUCTION Arsenic is an element that raises much concern from the both environmental and human health standpoints.The Leachability and Speciation of Arsenic and Selenium in Coal Fly Ash Tian Wang1, Jianmin Wang1, Ken Ladwig2 1 Department of Civil, Architectural & Environmental Engineering, University of Missouri – Rolla, Rolla, MO ; 2 Electric Power Research Institute (EPRI), Hillview Ave., Palo Alto, CA KEYWORDS: arsenic, selenium, leaching, speciation, fly ash.