scholarly journals Dust-Fraction of Granites, Migmatites, Marbleized Limestones, Ophiocalcites as a Carrier of Nanosized Dust Particles

2021 ◽  
Vol 36 ◽  
pp. 3-15
Author(s):  
A. Yu. Aleksandrova ◽  
◽  
S. S. Timofeeva ◽  
Keyword(s):  
Membrane Filtration ◽  
Raw Materials ◽  
Industrial Safety ◽  
Dust Particles ◽  
Nanosized Particles ◽  
Negative Component ◽  
Safety And Health ◽  
Irkutsk Region ◽  
Stone Dust ◽  
Dust Fraction

In this work, we will discuss the study the dispersed composition stone dust such industrial objects as deposits migmatites, granites, marbleized limestone and ophiocalcites. The dust-like fraction the listed rocks is considered and evaluated as a micro-sized and nanosized component their structure formation. The main regularities of the formation nano- and microdust particles have been determined by the method membrane filtration. The most promising feature membrane filtration for the separation of professional (stone) dust mining quarries has been developed, which must be taken into account when developing a technology for processing raw materials, when separating particles into fractions for further use in the production the final product, when standardizing and qualitatively assessing the effect a nanosized fraction on the human body and environment. As a result the experiments carried out, the dispersed composition the rocks extracted at the quarries raw materials in the Irkutsk region was analyzed. The percentage particles with dimensions from 0.05 to 10 microns in the studied samples of professional dust was determined. The presence nanosized particles in them was confirmed, which, in turn, are the carrier a negative component, which can be considered from the point view industrial safety and health protection miners as a factor in the development such occupational diseases.

Calculation of Technical Characteristics of the Technical Fleet Vessels Involved in Ensuring Safety of the Offshore Facilities of Oil and Gas Complex

2021 ◽  
pp. 7-13
Author(s):  
S.V. Matsenko ◽  
◽  
V.M. Minko ◽  
A.A. Koshelev ◽  
V.Yu. Piven ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Oil Pollution ◽  
Raw Materials ◽  
Experimental Studies ◽  
Industrial Safety ◽  
Theoretical Studies ◽  
Physical Processes ◽  
Oil Spill Response ◽  
Sea Area

Violation of industrial safety rules during the operation of offshore facilities for the production, storage and transportation of the hydrocarbon raw materials leads in the most cases to pollution of the marine environment with oil and its components. The works on localization and elimination of such pollution are carried out with the help of vessels of the technical support fleet and booms. When developing oil spill response plans at such facilities, a calculated determination of the technical characteristics of vessels and booms is required that are sufficient to carry out the planned activities. The basic design principles for determining the towing capacity of the technical fleet vessels involved in the localization and elimination of oil and oil product spills by trawling methods are given in the article. The calculation is based on theoretical studies performed by the authors of the physical processes occurring during the movement of objects of a mobile trawling order in the sea area. The results obtained during the course of theoretical studies were confirmed by the experimental studies carried out by the authors personally using the real pieces of equipment in the actual development of tasks for training spill containment by trawling. As a result, the empirical dependencies were obtained and experimentally confirmed, which can be used to calculate technical characteristics of the ships as part of the mobile orders and anchor systems as part of stationary orders intended for the localization and elimination of oil pollution. These results can be used, among other things, for the calculated substantiation of the technical characteristics of the technical fleet vessels designed to ensure safety of the offshore facilities for production, storage, and transportation of the hydrocarbon raw materials.

Complex process of membrane filtration of secondary dairy raw materials

2021 ◽  
Vol 1 (55) ◽  
pp. 58-61
Author(s):  
S.P. Babenyshev ◽  
◽  
A.A. Bratsikhin ◽  
D.S. Mamaj ◽  
A.V. Mamaj ◽  
...  
Keyword(s):  
Membrane Filtration ◽  
Raw Materials ◽  
Complex Process

scholarly journals Chemical aging of atmospheric mineral dust during transatlantic transport

2016 ◽  
Author(s):  
Mohamed Abdelkader ◽  
Swen Metzger ◽  
Benedikt Steil ◽  
Klaus Klingmüller ◽  
Holger Tost ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Direct Effect ◽  
Dust Particles ◽  
Hygroscopic Growth ◽  
Aging Effects ◽  
Particle Sedimentation ◽  
Inter Tropical Convergence Zone ◽  
Dust Transport ◽  
Dust Fraction ◽  
The Impact

Abstract. Transatlantic dust transport has many implications for the atmosphere, ocean and climate. We present a modeling study on the impact of the key processes (dust emissions flux, convection and dust aging parameterizations) that control the transatlantic dust transport. Typically, the Inter-Tropical Convergence Zone (ITCZ) acts as a barrier for the meridional dust transport. To characterize the dust outflow over the Atlantic Ocean, we address two regional phenomena: (i) dust interactions with the ITCZ (DIZ) and (ii) the adjacent dust transport over the Atlantic Ocean (DTA). In the DTA zone, the dust loading shows a steep and linear gradient westward over the Atlantic Ocean where particle sedimentation is the dominant removal process, whereas in the DIZ zone cloud interactions and wet deposition predominate. To study the different impacts of aging, we present two case studies that exclude condensation and coagulation, and include dust aging at various levels of complexity. For dust aging, we consider the uptake of inorganic acids on the surface of mineral particles that form salt compounds. Calcium, used as a proxy for the overall chemically reactive dust fraction, drives the dust-related neutralization reactions leading to higher dust aerosol optical depth (AOD). The aged dust particles are transferred to the soluble aerosol modes in the model and are mixed with other species that originate from anthropogenic and natural sources. The neutralization products (salts) take up water vapor from the atmosphere and increase the dust AOD under subsaturated conditions. We define the "direct effect of dust aging" to refer to the increase in AOD as a result of hygroscopic growth. On the other hand, the aged dust is more efficiently removed (wet and dry) because of the increase in particle size and hygroscopicity. This more efficient removal reduces the dust AOD over the DIZ zone. We define this as the "indirect effect of dust aging", complementary to the direct effect that is dominant in the DTA zone. Distinction of the two aging effects helps develop insight into the regional importance of dust–air-pollution interactions.

Comparing Effectiveness of E-Learning Training and Traditional Training in Industrial Safety and Health

2013 ◽  
pp. 214-229
Author(s):  
Norlinda Binti Mohd Rozar ◽  
Abdullah Bin Ibrahim ◽  
Muhammad Ashlyzan Bin Razik
Keyword(s):  
Evaluation Model ◽  
Work Environments ◽  
Industrial Safety ◽  
Training Methods ◽  
Safety And Health ◽  
Traditional Training ◽  
E Learning ◽  
Four Levels ◽  
Kirkpatrick’S Model

In response to the demanding change in work environments, most companies not only depend on traditional training, but also on e-learning and emphasizing it in safety and health. The benefits and cost effectiveness of the benefits of e-learning training are trusted. Nevertheless, accidents still happen at the workplace. This has become an issue to be studied, especially on the effectiveness of e-learning training in comparison to traditional training. In this study, a framework to measure comparative effectiveness between these two learning environments was developed based on Kirkpatrick’s four-level evaluation model and a case study was applied to test all the levels of the framework. These four levels include participant reaction, learning, achievements, behavior of employees, and results. The interview results indicated that there is no difference in the rating of the effectiveness of the two training methods based on Kirkpatrick’s model.

Sign in / Sign up

Export Citation Format

Share Document