Application of inverse dispersion modelling for the determination of PM emission factors from fugitive dust sources in open-pit lignite mines

2017 ◽  
Vol 62 (2/3/4) ◽  
pp. 274
Author(s):  
Athanasios Triantafyllou ◽  
Nicolas Moussiopoulos ◽  
Athina Krestou ◽  
George Tsegas ◽  
Fotios Barmpas ◽  
...  
Keyword(s):  
Emission Factors ◽  
Open Pit ◽  
Dispersion Modelling ◽  
Fugitive Dust ◽  
Inverse Dispersion ◽  
Dust Sources ◽  
Lignite Mines

Application of inverse dispersion modelling for the determination of PM emission factors from fugitive dust sources in open-pit lignite mines

2017 ◽  
Vol 62 (2/3/4) ◽  
pp. 274
Author(s):  
Μelina Andreadou ◽  
Fotios Barmpas ◽  
Stelios Garas ◽  
George Tsegas ◽  
Nicolas Moussiopoulos ◽  
...  
Keyword(s):  
Emission Factors ◽  
Open Pit ◽  
Dispersion Modelling ◽  
Fugitive Dust ◽  
Inverse Dispersion ◽  
Dust Sources ◽  
Lignite Mines

scholarly journals Determination of car on-road black carbon and particle number emission factors and comparison between mobile and stationary measurements

2015 ◽  
Vol 8 (1) ◽  
pp. 43-55 ◽  
Author(s):  
I. Ježek ◽  
L. Drinovec ◽  
L. Ferrero ◽  
M. Carriero ◽  
G. Močnik
Keyword(s):  
Black Carbon ◽  
Particle Number ◽  
Emission Factors ◽  
Emission Measurement ◽  
Stationary Method ◽  
Characteristic Value ◽  
Portable Emission Measurement System ◽  
Specific Distribution ◽  
Mobile Measurement

Abstract. We have used two methods for measuring emission factors (EFs) in real driving conditions on five cars in a controlled environment: the stationary method, where the investigated vehicle drives by the stationary measurement platform and the composition of the plume is measured, and the chasing method, where a mobile measurement platform drives behind the investigated vehicle. We measured EFs of black carbon and particle number concentration. The stationary method was tested for repeatability at different speeds and on a slope. The chasing method was tested on a test track and compared to the portable emission measurement system. We further developed the data processing algorithm for both methods, trying to improve consistency, determine the plume duration, limit the background influence and facilitate automatic processing of measurements. The comparison of emission factors determined by the two methods showed good agreement. EFs of a single car measured with either method have a specific distribution with a characteristic value and a long tail of super emissions. Measuring EFs at different speeds or slopes did not significantly influence the EFs of different cars; hence, we propose a new description of vehicle emissions that is not related to kinematic or engine parameters, and we rather describe the vehicle EF with a characteristic value and a super emission tail.

Utilization of open pit burned household waste ash – a feasibility study in Dhaka

2014 ◽  
Vol 32 (5) ◽  
pp. 397-405
Author(s):  
Md. Obaidul Haque ◽  
Ahmed Sharif
Keyword(s):  
Room Temperature ◽  
Raw Materials ◽  
Bottom Ash ◽  
Open Pit ◽  
Household Waste ◽  
Chemical Compositions ◽  
Muffle Furnace ◽  
Clay Bricks ◽  
Peripheral Area

Informal incineration or open pit burning of waste materials is a common practice in the peripheral area of Dhaka, one of the fastest growing mega-cities in the world. This study deals with the effect of open pit burned (i.e. open burned) household waste bottom ash on fired clay bricks. Between 0 to 50% (by weight) of open pit burned household waste bottom ash was mixed with clay to make bricks. The molded specimens were air-dried at room temperature for 24 h and then oven dried at 100 °C for another 24 h to remove the water. The raw bricks were fired in a muffle furnace to a designated temperature (800, 900 and 1000 °C, respectively). The firing behaviour (mechanical strength, water absorption and shrinkage) was determined. The microstructures, phase compositions and leachates were evaluated for bricks manufactured at different firing temperatures. These results demonstrate that open pit burned ash can be recycled in clay bricks. This study also presents physical observations of the incinerated ash particles and determination of the chemical compositions of the raw materials by wet analysis. Open pit burned ash can be introduced easily into bricks up to 20% wt. The concentrations of hazardous components in the leachates were below the standard threshold for inert waste category landfill and their environmental risk during their use-life step can be considered negligible.

Determination of rock hardness at the chrysotile - asbestos deposit

2020 ◽  
Author(s):  
P.I. Zuev ◽  
◽  
V.S. Vedernikov ◽  
D.V. Grigoriev ◽  
◽  
...  
Keyword(s):  
Economic Feasibility ◽  
Open Pit ◽  
Open Pit Mining ◽  
Chrysotile Asbestos ◽  
Calculation Methods ◽  
Rock Hardness ◽  
Technological Improvement

The article presents field and calculation methods for determining the rock hardness at the chrysotile-asbestos deposit mined by the open–pit mining. The methods presented are necessary for technological improvement of mining (including optimization of drilling and blasting operations), which, in the turn, improves the economic feasibility of the chrysotile-asbestos mining.

scholarly journals Field test of available methods to measure remotely SO<sub>x</sub> and NO<sub>x</sub> emissions from ships

2014 ◽  
Vol 7 (8) ◽  
pp. 2597-2613 ◽  
Author(s):  
J. M. Balzani Lööv ◽  
B. Alfoldy ◽  
L. F. L. Gast ◽  
J. Hjorth ◽  
F. Lagler ◽  
...  
Keyword(s):  
Field Studies ◽  
Emission Factors ◽  
Sulphur Content ◽  
Nox Emission ◽  
Optical Methods ◽  
Optical Absorption Spectroscopy ◽  
Open Sea ◽  
Remote Measurements ◽  
Convenient Technique

Abstract. Methods for the determination of ship fuel sulphur content and NOx emission factors based on remote measurements have been compared in the harbour of Rotterdam and compared to direct stack emission measurements on the ferry Stena Hollandica. The methods were selected based on a review of the available literature on ship emission measurements. They were either optical (LIDAR, Differential Optical Absorption Spectroscopy (DOAS), UV camera), combined with model-based estimates of fuel consumption, or based on the so called "sniffer" principle, where SO2 or NOx emission factors are determined from simultaneous measurement of the increase of CO2 and SO2 or NOx concentrations in the plume of the ship compared to the background. The measurements were performed from stations at land, from a boat and from a helicopter. Mobile measurement platforms were found to have important advantages compared to the land-based ones because they allow optimizing the sampling conditions and sampling from ships on the open sea. Although optical methods can provide reliable results it was found that at the state of the art level, the "sniffer" approach is the most convenient technique for determining both SO2 and NOx emission factors remotely. The average random error on the determination of SO2 emission factors comparing two identical instrumental set-ups was 6%. However, it was found that apparently minor differences in the instrumental characteristics, such as response time, could cause significant differences between the emission factors determined. Direct stack measurements showed that about 14% of the fuel sulphur content was not emitted as SO2. This was supported by the remote measurements and is in agreement with the results of other field studies.

Determination of emission factors for climate forcers and air pollutants from improved wood-burning cookstoves in Mexico

2019 ◽  
Vol 50 ◽  
pp. 61-68 ◽  
Author(s):  
Zuhelen Padilla-Barrera ◽  
Ricardo Torres-Jardón ◽  
Luis Gerardo Ruiz-Suarez ◽  
Telma Castro ◽  
Oscar Peralta ◽  
...  
Keyword(s):  
Air Pollutants ◽  
Emission Factors ◽  
Wood Burning
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