Beryllium - Wikipedia
The Sun has a concentration of 0.1 parts per billion (ppb) of beryllium. Beryllium has a concentration of 2 to 6 parts per million (ppm) in the Earths crust. It is most concentrated in the soils, 6 ppm. Trace amounts of 9 Be are found in the Earths atmosphere. The concentration of beryllium in sea water is …
ATSDR - Public Health Statement: Beryllium
21.01.2015 · In the United States, the average concentration of beryllium in air is 0.03 nanograms (ng) (1 ng=1 billionth of a gram) in a cubic meter (ng/m³) of air. In U.S. cities, the average air concentration is higher, and its value is 0.2 ng in a cubic meter (m³) of air. Cities have higher levels of beryllium in the air because beryllium is released from burning coal and fuel oil. The amount of …
Beryllium Concentrations at European Workplaces ...
An overview on Be exposure concentrations averaged over all industries in 26 European countries is given by Cherrie et al. (2011). The geometric mean concentrations ranged from 70 to 170ng m −3, the 90th percentile not >2000ng m −3. Cherrie assumed that these exposures ‘were measured as …
Beryllium - Wikipedia
The Sun has a concentration of 0.1 parts per billion (ppb) of beryllium. Beryllium has a concentration of 2 to 6 parts per million (ppm) in the Earths crust. It is most concentrated in the soils, 6 ppm. Trace amounts of 9 Be are found in the Earths atmosphere. The concentration of beryllium in sea water is 0.2–0.6 parts per trillion.
About Beryllium | Department of Energy
According to data collected by the Environmental Protection Agency (EPA), the average concentration of airborne beryllium in the U.S. is very small (0.03 nanogram/cubic meter—a nanogram is one-billionth of a gram). Beryllium used in industry begins as a silicate (BeSiO 3) in beryl and bertrandite ores. In a very pure crystalline form, beryl is known to us as gems such as blue-green aquamarine and green …
Beryllium - ScienceDirect
The average concentrations of beryllium measured in human organs were as follows: 0.21 mg/kg in the lung, 0.08 mg/kg in the brain, 0.07 mg/kg in the heart, and 0.02 mg/kg in the bone.
Beryllium - an overview | ScienceDirect Topics
The average beryllium concentration in the Earth’s crust is estimated to be 2-5.0 mg/kg. Approximately 50 beryllium minerals occur in nature, and over half of these are silicates. The most common beryllium silicates are beryl, chrysoberyl, and phenacite. The common beryllium silicates are highly insoluble in aqueous solutions and are resistant to stone weathering. Soil concentrations of …
Beryllium in Drinking-water - WHO
ng/litre. Beryllium concentrations ranged from <4 to 120 ng/litre in the US Great Lakes and from <10 to 120 ng/litre (10–30 ng/litre average) in Australian river waters. Based on the US EPA’s STORET database for the years 1960–1988, the geometric mean concentration of total beryllium in US surface waters was estimated to be 70 ng/litre. Sediments from lakes in Illinois, USA, contained 1.4–7.4 mg
Ambient Water Quality Criteria for Beryllium
0.18 lIgll. In a study of beryllium in ground water, drinking water, and surface water, Reichert (1973) found that even in the heavily polluted Rhine and Main Rivers (Germany), the concentration was below 0.02 lIg!1. Hem (1970) estimates that the average concentration of beryllium in fresh sur face waters is …
Historical Analysis of Airborne Beryllium …
21.04.2009 · The average airborne beryllium concentration from the long-term samples (>120 min, n = 241) was 0.023 μg m −3 (SD 0.179 μg m −3). The 95% UCL of the mean beryllium concentration was 0.074 μg m −3 , and the exceedance fraction was 0.004 (<0.001–0.020).
Beryllium Compounds - United States Environmental ...
The average concentration of beryllium measured in the air in the United States during the 1980s was 0.03 nanograms per cubic meter (ng/m 3). Ambient concentrations measured in 50 cities between 1977 and 1981 were 0.1-0.4 ng/m 3. (1) Assessing Personal Exposure
Evaluation of historical beryllium abundance in …
Additionally, 99.96% of monthly air samples fell below the mean US atmospheric beryllium concentration of ~ 500 pg/m 3 reported by Fishbein (1981). It also appears from the data in Fig. 5 that the airborne concentration of beryllium has fallen over time, with an average of ~ 25 pg/m 3 overall from 1974 to 2010 but only 5 pg/m 3 in 2010.
Beryllium and Beryllium Compounds
Beryllium and Beryllium Compounds . December 16 - 17, 1999 . Meeting of the NTP Board of Scientific Counselors Report on Carcinogens Subcommittee . Prepared for the: U.S. Department of Health and Human Services Public Health Service National Toxicology Program Research Triangle Park, NC 27709 . Prepared by: Technology Planning and Management Corporation Canterbury Hall, Suite 310 4815 …
Case Study 5: Beryllium Toxicity | Environmental …
Some workers manifest this cellular immune response even if they work in areas where beryllium air concentrations are found to be below the recommended workplace exposure limits. Sensitization has been reported in security guards, secretaries, and custodial staff who work at facilities using beryllium. No correlation has been found between smoking and increased incidence of beryllium disease ...
beryllium concentrating mill - hitlershollywood.de
Action level means a concentration of airborne beryllium of 01 micrograms per cubic meter of air μgm 3 calculated as an 8hour timeweighted average TWA Airborne exposure and airborne exposure to beryllium mean the exposure to airborne beryllium that would occur if . More Detail ; A Guide to Designing and Fabricating with Beryllium. beryllium and its derivative materials dating back to the ...
§1926.1124 Beryllium.
Action level means a concentration of airborne beryllium of 0.1 micrograms per cubic meter of air (µg/m. 3) calculated as an 8-hour time-weighted average (TWA). Airborne exposure and airborne exposure to beryllium mean the exposure to airborne beryllium that would occur if the employee were not using a respirator. Assistant Secretary means the Assistant Secretary of Labor for Occupational ...
1910.1024 - Beryllium. | Occupational Safety and …
Action level means a concentration of airborne beryllium of 0.1 micrograms per cubic meter of air (μg/m 3) calculated as an 8-hour time-weighted average (TWA). Airborne exposure and airborne exposure to beryllium mean the exposure to airborne beryllium that would occur if …
A review of the toxicity of beryllium in air
Science Report – A review of the toxicity of beryllium in air 3 beryllium than other rock types, estimated to contain about 5 mg kg-1 on average (Levinson,1980; Reimann et al., 1998), with some residual granitic pegmatites, such as the Meldon aplite, Dartmoor, Devon, being extremely enriched, containing up to several hundred mg kg-1. As ...
A Reconsideration of Acute Beryllium Disease
28.04.2009 · From these GA or BZ sample data, we selected the highest time-weighted average (TWA) beryllium concentration on any given day from the work areas or activities associated with a worker’s stone and tenure. Each case is presented with the worker’s written permission and institutional review board approval. Case 1. A healthy 20-year-old male nonsmoker began working at the beryllium production ...
Beryllium Concentrations at European Workplaces ...
25.03.2015 · Beryllium Concentrations at European Workplaces: Comparison of ‘Total’ and Inhalable Particulate Measurements Heiko Kock. 1. Fraunhofer Institute Toxicology and Experimental Medicine, Nikolai-Fuchs-Str 1, 30625 Hannover, Germany. Search for other works by this author on: Oxford Academic. PubMed. Google Scholar. Heiko Kock, Terence Civic. 2. Materion Corporation, 6070 …