NSF Award Search: Award # 1545859

Modeling and sensitivity studies will (1) evaluate the sensitivity of Asian climate and the dust cycle to the growth of topography and to the background global climate; (2) determine the amount of cooling that could result from Pliocene dust transport to the North Pacific; (3) evaluate the potential influence of Asian dust on atmospheric CO2.

Health effects of World Trade Center (WTC) Dust: An ...

The bulk (about 80–90%) of the WTC Dust was generated by the successive collisions of the concrete floor slabs of the 110-story towers as they cascaded down on each lower floor, crushing the concrete, the gypsum (calcium sulfate) wallboard, and the glass- and slag-wool insulation fibers (SVFs) into a finely divided mixed powder with ...

PROPPANTS Ne resin-coated 0 es and reduces roppant …

2018-10-18 · 30 sec, the lack of dust in RCS 100 was readily apparent. By comparison, after 2 hr and 50 min., the uncoated 100 mesh sand was still cloudy with suspended ultra-fine respirable dust. Additional dust can be generated when proppant is transported to its final destination, due to mechanical abrasion. Ball mill tests were conducted to simu-

Dust Bowl: Cause & Impact On Great Depression

2009-10-27 · The Dust Bowl intensified the crushing economic impacts of the Great Depression and drove many farming families on a desperate migration in search of work and better living conditions.

Characterization of residential dust from ...

2019-12-17 · Physical and biological properties of dust particles might affect the availability and distribution of chemicals associated to indoor dust; however it has not been adequately examined. In this study, dust from Shanghai was fractionated into five particle sizes and size distribution, morphology, surface area, organic matter, microorganisms, elemental composition, metals and ...

Characterization of different road dusts in opencast coal ...

2011-6-24 · Dust is the major air pollutant in opencast coal mining areas (CMRI 1998; Vallack and Shillito 1998).Singh has reported haul roads to produce 0.25–0.70 kg of dust per kilometer travel of a dumper.Ghose and Majee reported a total generation of 9.4 t dust per day as a result of whole mining operation in an opencast mine of Jharia Coalfields, of which 7.8 t dust was generated due to various ...

ANOMALOUS SILICATE DUST EMISSION IN THE TYPE 1 …

2010-5-19 · The American Astronomical Society (AAS), established in 1899 and based in Washington, DC, is the major organization of professional astronomers in North America. Its membership of

Removal of fine particulate matter (PM2.5) via atmospheric ...

2019-2-1 · To compare the dust removal capabilities of five plants, we monitored their mass concentrations of PM 10 and PM 2.5 particles in the test chamber (Fig. 1a and b). The mass concentrations of PM 10 particles in the chamber with the test plant species exhibit a trend similar to those in the empty chamber. Independent of plants species, PM 10 particle concentration is …

Sources and variability of inhalable road dust particles ...

2011-12-1 · By far the most polluted site in terms of road dust <10 μm mass loading is Barcelona (Spain), where a range of 3.7–23.1 mg m −2 was recorded in the city center samples. Four main sources were found to drive the variability of road dust particles <10 μm: Mineral (road wear and urban dust generated mostly by construction emissions), Motor ...

Hazard Communication Guidance for Combustible Dusts ...

2021-8-25 · Hazard Communication Guidance for Combustible Dusts. OSHA 3371-08 2009. Occupational Safety and Health Act of 1970. "To assure safe and healthful working conditions for working men and women; by authorizing enforcement of the standards developed under the Act; by assisting and encouraging the States in their efforts to assure safe and healthful ...

Waste management

Amount and composition of waste. In 2016, the total amount of waste generated in the EU by all economic activities and s was 2 261 million tonnes. The construction sector contributed 34.8% to the total amount of waste, followed by mining (27.6%), manufacturing (11.1%), waste and water supply (9.5%) and s (8.3%).

Influence of hard rock dust on the physical and ...

2020-10-14 · Rock dust disposal is a concern in a hard rock mining site which results from blasting operation during mining. Significant amount of rock dust is generated during mining which causes dusting problem as well. In this work, Rock dust was used with red clay to produce ceramic tiles. XRF analysis revealed the existence of more than 60 wt.% SiO2 in red clay and more than 50 wt.% SiO2 in rock dust ...

Resilience of the Asian atmospheric circulation shown by ...

2016-8-4 · The onset of modern central Asian atmospheric circulation is traditionally linked to the interplay of surface uplift of the Mongolian and Tibetan-Himalayan orogens, retreat …

JMSS-1: a new Martian soil simulant | Earth, Planets and ...

2015-5-20 · It is important to develop Martian soil simulants that can be used in Mars exploration programs and Mars research. A new Martian soil simulant, called Jining Martian Soil Simulant (JMSS-1), was developed at the Lunar and Planetary Science Research Center at the Institute of Geochemistry, Chinese Academy of Sciences. The raw materials of JMSS-1 are Jining basalt and Fe oxides …

(PDF) Impact of Solid Waste on Health and The Environment

The generated waste is disposed of in the Reppi open landfill. Together with Ethiopian electric power (EEP) and the City Government of Addis Ababa, waste has been converted to energy since 2019.

Identifying errors in dust models from data assimilation ...

2016-8-19 · 1 Introduction. Mineral dust is an important component of the Earth system [Knippertz and Todd, 2012], scattering and absorbing both solar and infrared radiation and affecting cloud microphysics.Dust is increasingly being predicted prognostically within numerical weather prediction (NWP) models because of its impacts on atmospheric circulation [Mulchay et al., 2014; Solomos et …

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NPV analysis of multiple surface constraints for pit ...

Moving the crushing + homogenization system and southwestern waste pile, according to the S2 scenario, is the best alternative as demonstrated in this study. However much of the resources will be left in place and a pit design would be necessary to determine the amount of ore that would be left behind before a final decision is taken.

High Angular Resolution ALMA Images of Dust and …

2019-11-19 · The dust grains would have cooled by radiation, and subsequent collisions of grains with gas would also cool the gas, suppressing the CO J = 6 5 intensity. The data show a dust peak spatially coincident with the molecular hole seen in previous ALMA CO J = 2 1 and SiO J = 5 4 images. That dust peak, combined with CO and SiO line spectra ...

Strong links between Saharan dust fluxes, monsoon strength ...

Despite the multiple impacts of mineral aerosols on global and regional climate and the primary climatic control on atmospheric dust fluxes, dust-climate feedbacks remain poorly constrained, particularly at submillennial time scales, hampering regional and global climate models. We reconstruct Saharan dust fluxes over Western Europe for the last 5000 years, by means of speleothem strontium ...

DESTRUCTION OF INTERSTELLAR DUST IN EVOLVING …

2015-4-6 · Supernova generated shock waves are responsible for most of the destruction of dust grains in the interstellar medium (ISM). Calculations of the dust destruction timescale have so far been carried out using plane parallel steady shocks, however, that approximation breaks down when the destruction timescale becomes longer than that for the evolution of the supernova remnant (SNR) shock.

Plasma Sci. Technol.

2021-7-26 · Plasma Sci. Technol. 2021, 23 (9): 095403; doi: 10.1088/2058-6272/ac125d. Abstract ( 13) PDF (1991KB) ( 1 ) This paper reports the use of machine learning to enhance the diagnosis of a dusty plasma. Dust in a plasma has a large impact on the properties of the plasma.

The effect of a fireworks event on the amount and ...

2014-8-27 · Amount of dust deposited on the surface of leaves. According to the t test, there was a significant difference (t 80 = −2.178; p = 0.032) between the amount of dust deposited on the surface of the collected leaf samples before and after the fireworks show (Fig. 2).The foliage dust significantly increased based on the GLM results after the fireworks event in all studied areas except the ...

A Theory for the Variation of Dust Attenuation Laws in ...

2018-12-13 · We generate the stellar SEDs and subsequent dust radiative transfer with powderday, a code package that wraps fsps (Conroy et al. 2009, 2010b; Conroy & Gunn 2010), hyperion (Robitaille 2011), and yt (Turk et al. 2011). This process is performed on all snapshots at redshifts z …

Recycling metals from lithium ion battery by mechanical ...

2017-9-15 · The explanation was that Li 2 CO 3 was highly dispersed in calcined powders and no excellent Li 2 CO 3 crystal was generated. To prove the formation of Li 2 CO 3, the calcined powders were leached by distilled water because Li 2 CO 3 was slightly soluble in water, and then the Li 2 CO 3 crystals were obtained by evaporating the filter liquid as ...

Airborne Precautions

The microorganisms transmitted by an airborne route may be spread via fine mist, dust, aerosols, or liquids. The aerosolized particles are generated from a source of infection, such as an infected patient or animal. In addition, aerosols may be generated from biological waste products that accumulate in garbage cans, caves, and dry arid containers.

High‐latitude dust in the Earth system

One of these sources is Australia which is the largest contributor of dust under the current climate [Li et al., 2008]. The second major dust source affecting Antarctica is another high-latitude region, southern South America. Dust from this source, which includes …

we reasently learnt that ...

2011-6-20 · This is why when people cut stone or tiles now use a power tool that also sprays water to reduce the amount of dust in the air. On a gold minesite that I worked at once, there was a lot of silica dust produced from crushing the gold ore. In that situation I had to wear a mask to prevent breathing in silica dust. 0. Kieran Lim.

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