trituradoras y molinos pdf

trituradoras y molinos pdf

NIOSHTIC-2 Publications Search - 20040529 - Beryllium ...

2004-5-29  Beryllium was detected in 87% of samples collected at the munitions plant and in 72% of the samples collected at regional reference sites. Two munitions plant samples from areas near sanders and grinders were above 3.0 micro g/100 cm(2) (U.S. Department of Energy surface contamination limit).

Get Price

Quantifying beryllium concentrations in plant shoots from ...

2020-6-8  Beryllium is known to be one of the most toxic elements, and beryllium concentrations reported in non‐crop plants range from as low as 0.0013 μg/g up to 2.0 μg/g. 1, 3, 14, 15, 6-13 Because Be also occurs in coal at the lower μg/g level, Be contributes to air pollution through the combustion of fossil fuel and appears at elevated levels in ...

Get Price

Cosmogenic beryllium-7 in soil, rainwater and selected ...

Beryllium-7 is a radionuclide produced in the upper atmosphere by cosmic-ray spallation with ions of carbon, oxygen and nitrogen. It is one of radionuclides that can be used to trace the fine particulate matter of 2.5-µm diameter (PM 2.5) and smaller.In this work, 7 Be was determined in leaves of 10 plant species collected from streets, parks and open land and in 5 consecutive rains over ...

Get Price

Beryllium exposure and pulmonary function: a cross ...

A cross sectional study of 297 white male workers employed in a large beryllium plant was conducted to test the hypothesis that long term exposure to beryllium is associated with decrements in pulmonary function. Spirometric measurement of pulmonary function, chest radiographs, and arterial blood gas

Get Price

Beryllium-7 interception by cultivated plants on the ...

2021-4-27  Beryllium-7 (7 Be) is produced by the interaction between nitrogen and oxygen nuclei cosmic rays in the upper atmosphere [1, 2], as shown in Fig. 1.Through this spallation reaction, BeO and Be(OH) 2 are quickly formed, dispersed through the atmosphere, and adsorbed onto submicron aerosols, which move within the atmosphere and enter the ocean or soil through wet and dry sedimentation [].

Get Price

(PDF) Beryllium7 activity concentration in plants on the ...

The activity concentration of beryllium-7 (7Be), a naturally occurring cosmogenic radionuclide produced in the upper atmosphere, was measured in plants on the Loess plateau of China during the ...

Get Price

Beryllium-7 activity concentration in plants on the Loess ...

2011-4-20  Beryllium-7 mass activity concentration in plant species. Beryllium-7 mass activity concentrations for the 14 plant species after 219 mm of rain had fallen are presented in Table 1.Beryllium-7 mass activity concentrations ranged from 15.7 to 147.1 Bq kg −1.The mean 7 Be mass activity concentration of all the plants was 73.5 Bq kg −1; the coefficient of variation was 59.9%.

Get Price

Historical Analysis of Airborne Beryllium Concentrations ...

In this paper, we evaluated the airborne beryllium concentrations at a machining plant using historical industrial hygiene samples collected between 1964 and 2000. With the exception of a few projects conducted in the 1960s, it is believed that >95% of the operations used copper beryllium alloy exclusively.

Get Price

Beryllium in exhaled breath condensate as a biomarker of ...

2016-1-1  Low beryllium exposure can induce pulmonary granulomatosis, so called berylliosis. For occupational health monitoring, it is more relevant to assess the internal dose of Be received by the lungs than urinary or atmospheric Be. Exhaled breath condensate (EBC) is a matrix collected non-invasively that derives from the airway lining fluid.

Get Price

Beryllium Poisoning - ScienceDirect

Beryllium poisoning has also been described in people living near a beryllium plant, and others have been exposed acci. dentally and unknowingly through home laundering of working-clothes.11-16 s Acute beryllium poisoning can affect any level of the respiratory tract, causing rhinitis, nasopharyngitis, tracheobronchitis, or

Get Price

NIOSHTIC-2 Publications Search - 20040529 - Beryllium ...

2004-5-29  Beryllium was detected in 87% of samples collected at the munitions plant and in 72% of the samples collected at regional reference sites. Two munitions plant samples from areas near sanders and grinders were above 3.0 micro g/100 cm(2) (U.S. Department of Energy surface contamination limit).

Get Price

Quantifying beryllium concentrations in plant shoots from ...

2020-6-8  Beryllium is known to be one of the most toxic elements, and beryllium concentrations reported in non‐crop plants range from as low as 0.0013 μg/g up to 2.0 μg/g. 1, 3, 14, 15, 6-13 Because Be also occurs in coal at the lower μg/g level, Be contributes to air pollution through the combustion of fossil fuel and appears at elevated levels in ...

Get Price

Cosmogenic beryllium-7 in soil, rainwater and selected ...

Beryllium-7 is a radionuclide produced in the upper atmosphere by cosmic-ray spallation with ions of carbon, oxygen and nitrogen. It is one of radionuclides that can be used to trace the fine particulate matter of 2.5-µm diameter (PM 2.5) and smaller.In this work, 7 Be was determined in leaves of 10 plant species collected from streets, parks and open land and in 5 consecutive rains over ...

Get Price

Studies on chemical analogy of calcium and beryllium in

2010-5-9  This study was specifically aimed to determine the levels of beryllium and calcium in the soil collected near the vicinity of a beryllium processing facility (BPF) and to assess the effect of calcium addition, if any, to the soil. ... to a radial distance of 5 km from the plant. The soil samples at each of the locations were collected from an ...

Get Price

FORMER AMERICAN BERYLLIUM COMPANY TALLEVAST,

2007-11-15  American Beryllium Public Health Assessment American Beryllium operated an ultra-precision machine parts manufacturing plant, where beryllium-containing metals were milled, lathed, and drilled into various components. These operations created beryllium dust. Finishing of the components included electroplating, anodizing, and ultrasonic cleaning.

Get Price

Cosmogenic beryllium-7 in soil, rainwater and selected ...

Request PDF Cosmogenic beryllium-7 in soil, rainwater and selected plant species to evaluate the vegetal interception of atmospheric fine particulate matter Beryllium-7 is a radionuclide ...

Get Price

Retrospective Beryllium Exposure Assessment at the

Flats Plant. Beryllium exposure was assessed via fixed airhead (FAH) sampling in which the filter cassette was affixed to the machine, generally within a few feet of the worker's breathing zone. Approximately 500,000 FAH samples were collected for beryllium over three decades. From 1984

Get Price

Beryllium in exhaled breath condensate as a biomarker of ...

2016-1-1  Low beryllium exposure can induce pulmonary granulomatosis, so called berylliosis. For occupational health monitoring, it is more relevant to assess the internal dose of Be received by the lungs than urinary or atmospheric Be. Exhaled breath condensate (EBC) is a matrix collected non-invasively that derives from the airway lining fluid.

Get Price

Potential targets to reduce beryllium toxicity in plants ...

2019-6-1  Beryllium contamination worldwide is increasing and imposing serious threats to environment and humans (Shah et al., 2016).General sources of beryllium toxicity in humans are food, which were grown and harvested from beryllium contaminated soil or beryllium polluted water (Lovblad, 1977).In water beryllium settles on the bottom with sediments, while insoluble beryllium compounds can remain ...

Get Price

Beryllium Poisoning - ScienceDirect

Beryllium poisoning has also been described in people living near a beryllium plant, and others have been exposed acci. dentally and unknowingly through home laundering of working-clothes.11-16 s Acute beryllium poisoning can affect any level of the respiratory tract, causing rhinitis, nasopharyngitis, tracheobronchitis, or

Get Price

(PDF) Beryllium7 activity concentration in plants on the ...

The activity concentration of beryllium-7 (7Be), a naturally occurring cosmogenic radionuclide produced in the upper atmosphere, was measured in plants on the Loess plateau of China during the ...

Get Price

Health Consultation

2021-9-9  machining. The machining of beryllium, aluminum, titanium, and albemet (a 60% beryllium and 40 % aluminum blend) produced beryllium-containing dust. Chemicals used and wastes generated at the faci lity included oils, petroleumbased fuels, solvents, acids, and metals. American Beryllium collected wastewater in a holding pond on the

Get Price

Retrospective Beryllium Exposure Assessment at the

Flats Plant. Beryllium exposure was assessed via fixed airhead (FAH) sampling in which the filter cassette was affixed to the machine, generally within a few feet of the worker's breathing zone. Approximately 500,000 FAH samples were collected for beryllium over three decades. From 1984

Get Price

Studies on chemical analogy of calcium and beryllium in

2010-5-9  This study was specifically aimed to determine the levels of beryllium and calcium in the soil collected near the vicinity of a beryllium processing facility (BPF) and to assess the effect of calcium addition, if any, to the soil. ... to a radial distance of 5 km from the plant. The soil samples at each of the locations were collected from an ...

Get Price

Potential targets to reduce beryllium toxicity in plants ...

2019-6-1  Beryllium contamination worldwide is increasing and imposing serious threats to environment and humans (Shah et al., 2016).General sources of beryllium toxicity in humans are food, which were grown and harvested from beryllium contaminated soil or beryllium polluted water (Lovblad, 1977).In water beryllium settles on the bottom with sediments, while insoluble beryllium compounds can remain ...

Get Price

Pulmonary Function in Beryllium Workers: Assessment of ...

Beryllium exposure levels in the plant were high for many years, with some estimated exposure levels in excess of 100 [ig/m3. As late as 1975, there were exposures to beryllium above 10 jxg/m3 in some jobs. After about 1977, the plant was in compliance with the permissible exposure limit of 2*0 ig/m3. The median cumulative

Get Price

Beryllium Poisoning - ScienceDirect

Beryllium poisoning has also been described in people living near a beryllium plant, and others have been exposed acci. dentally and unknowingly through home laundering of working-clothes.11-16 s Acute beryllium poisoning can affect any level of the respiratory tract, causing rhinitis, nasopharyngitis, tracheobronchitis, or

Get Price

General James M. Gavin Plant - Ashtracker Site → 61

Tracking groundwater contamination at coal ash dumps. Snapshot. General James M. Gavin Plant has 76 groundwater monitoring wells, 76 of which have been polluted above federal advisory levels based on samples collected between January 18, 2010 and August 10, 2017. Groundwater at this site contains unsafe levels of mercury, thallium, arsenic, antimony, cadmium, beryllium, lead, selenium ...

Get Price

ADVANCES IN DESTRUCTIVE AND NON-DESTRUCTIVE

2004-3-24  proceedings series advances in destructive and non-destructive analysis for environmental monitoring and nuclear forensics proceedings of an international conference

Get Price

Method 200.7, Revision 4.4: Determination of Metals and ...

2021-6-25  method 200.7 . determination of metals and trace elements in water and wastes by inductively coupled plasma-atomic emission spectrometry revision 4.4

Get Price