scholarly journals Findings from the application of coal combustion by-products (CCB) for forest reclamation on spoil banks of the North Bohemian Brown Coal Basin

2009 ◽  
Vol 55 (No. 3) ◽  
pp. 137-144
Author(s):  
P. Čermák ◽  
V. Ondráček
Keyword(s):  
Brown Coal ◽  
Coal Combustion ◽  
Thermal Power ◽  
Soil Horizon ◽  
Carbonate Content ◽  
Acer Pseudoplatanus ◽  
Coal Basin ◽  
Forming Process ◽  
The North ◽  
By Products

Coal combustion by-products (stabilizate, FDG gypsum) generated by the thermal power station in Ledvice were tested on an above-level dump of the Bílina Mine in the North Bohemian Brown Coal Basin during the reclamation of its surface for forestry purposes. A part of the experimental object was treated with coal combustion by-products at a dose of 700–1,000 t/ha that were incorporated into the soil profile by very deep ploughing and the other part was left untreated for comparison. A one-year preparatory agrocycle was conducted on the entire experimental object – growing of <I>Leucosinapis alba</i> for green manuring and for reforestation bareroot and container-grown planting material was set out into dug holes [<I>Larix deciduas</I> L., <I>Pinus nigra</I> Arn., <I>Pinus sylvestris</I> L., <I> Quercus robur</I> L., <I>Carpinus betulus</I> L., <I>Acer pseudoplatanus</I> L., <I>Acer platanoides</I> L., <I>Alnus glutinosa</I> (L.) Gaertn., <I>Fraxinus excelsior</I> L., <I>Tilia cordata</I> Mill., <I>Betula verrucosa</I> Ehrh.]. The assessment of the experimental object at the age of 7 years indicated that as a result of the application of stabilizate and FDG gypsum there was an increase in porosity, water-retaining capacity, soil alkalinity and carbonate content; the soil-forming process was characterized by a decrease in soil alkalinity whereas the high alkalinity of the soil horizon treated with this amendment did not negatively influence the growth vitality of most tree species taxa used for reforestation.

The Latest Research in Mongolia on the Utilization of Coal Combustion By-Products

2021 ◽  
Vol 323 ◽  
pp. 8-13
Author(s):  
Jadambaa Temuujin ◽  
Damdinsuren Munkhtuvshin ◽  
Claus H. Ruescher
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Coal Combustion ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Power Stations ◽  
Thermal Power Stations ◽  
Coal Ashes ◽  
By Products

With a geological reserve of over 170 billion tons, coal is the most abundant energy source in Mongolia with six operating thermal power stations. Moreover, in Ulaanbaatar city over 210000 families live in the Ger district and use over 800000 tons of coal as a fuel. The three thermal power plants in Ulaanbaatar burn about 5 million tons of coal, resulting in more than 500000 tons of coal combustion by-products per year. Globally, the ashes produced by thermal power plants, boilers, and single ovens pose serious environmental problems. The utilization of various types of waste is one of the factors determining the sustainability of cities. Therefore, the processing of wastes for re-use or disposal is a critical topic in waste management and materials research. According to research, the Mongolian capital city's air and soil quality has reached a disastrous level. The main reasons for air pollution in Ulaanbaatar are reported as being coal-fired stoves of the Ger residential district, thermal power stations, small and medium-sized low-pressure furnaces, and motor vehicles. Previously, coal ashes have been used to prepare advanced materials such as glass-ceramics with the hardness of 6.35 GPa, geopolymer concrete with compressive strength of over 30 MPa and zeolite A with a Cr (III) removal capacity of 35.8 mg/g. Here we discuss our latest results on the utilization of fly ash for preparation of a cement stabilized base layer for paved roads, mechanically activated fly ash for use in concrete production, and coal ash from the Ger district for preparation of an adsorbent. An addition of 20% fly ash to 5-8% cement made from a mixture of road base gave a compressive strength of ~ 4MPa, which exceeds the standard. Using coal ashes from Ger district prepared a new type of adsorbent material capable of removing various organic pollutants from tannery water was developed. This ash also showed weak leaching characteristics in water and acidic environment, which opens up an excellent opportunity to utilize.

scholarly journals Remote and ground-based observations of land cover restoration after forest reclamation within a brown coal basin

2020 ◽  
Vol 29 (1) ◽  
pp. 135-145
Author(s):  
Oleksandr M. Masiuk ◽  
Mykola M. Kharytonov ◽  
Sergey A. Stankevich
Keyword(s):  
Land Cover ◽  
Brown Coal ◽  
Black Locust ◽  
Self Regulation ◽  
Coal Basin ◽  
Forming Process ◽  
Mixed Stands ◽  
Stem Wood ◽  
Forest Reclamation ◽  
Remote Assessment

The Semyonovsky - Golovkovsky brown - coal deposit is located within the boundaries of the Dnieper basin geological group and is located in the Alexandria mining region on the watershed of the Ingulets and Beshka rivers. Overburden rocks are loess - like, red - brown and glauconite - containing loams, kaolin and carbonaceous clays quartz, glauconite - containing and carbonaceous sands. The total area of reclaimed land was about 1006 hectares, of which 39 % was used for agriculture, 2 % was pasture and 59 % under forest reclamation. Geomorphologic assessment of the studied area was performed using Sentinel-1 satellite radar interferometry. Multispectral imagery of Sentinel -2 satellite system was used for remote assessment within the study area. We assessed the state of the Robina pseudoacacia plants growing under various forest conditions, in plantations created on the reclaimed landscapes of the Semenovsky - Golovkovsky brown coal basin. The processes of self-regulation and restoration of fertility on the reclaimed lands at the first stages of their biological development were slowed down. This significantly reduced the resistance of phytocenoses, both pure and mixed, to the conditions of the environment to which they were exposed. A comparison of the inventory stem wood of the black locust showed the superiority of monoculture plantations to mixed stands of pine - black locust and maple - black locust. The forest-forming process progresses with age. Remote assessment of the territories was conducted to assess the future prospects of biological conservation of reclaimed lands. The influence of the anthropogenic factor is observed throughout the section and is manifested in the man-made formation of the relief, reshaping of dumps, removal to the surface of overburden rocks. It is established that the height values can vary from 85 m to 213 m. 82.8 % of the surveyed area has not undergone significant changes in relief. About 15.5 % of the territory was under the influence of alluvial - diluvia processes. There have been corresponding changes in the share of vegetation according to vegetation cover fraction (VCF) over the past three years. The highest moisture content at the level of 0.2 - 0.3 relative units in 2015 was recorded in the territory occupying 78.4 % . Meanwhile, the shares of land cover with this level of humidity increased by almost 9% during the following 3 years to 2018. The highest density of vegetative cover was recorded in the North -Western part of the study area of forest reclamation. Thus, considering the potential suitability of the area for forest reclamation, we should note the important role of geomorphological, geological and water resources for the growth and development (formation) of plant communities.

scholarly journals The rise of the mine water level in the area of the former Kohinoor II mine and the influence on the surrounding aquifer systems of abandoned mines in the central part of the North Bohemian Brown Coal Basin

2011 ◽  
Vol 59 (3) ◽  
pp. 135-142
Author(s):  
Milan Mikoláš ◽  
Jiří Varady ◽  
Jaroslav Bažant ◽  
František Žoček
Keyword(s):  
Coal Seam ◽  
Water Level ◽  
Brown Coal ◽  
Mine Water ◽  
Abandoned Mines ◽  
Coal Basin ◽  
The North ◽  
Water Pumping ◽  
Aquifer Systems ◽  
Water Rise

The aim of this article is to evaluate the process of terminating the mine water pumping after the liquidation of the Kohinoor II coal mine, situated in the central part of the North Bohemian Brown Coal Basin (NBB) and the subsequent resumption of pumping from the surface after the mine water rise in the area of the former mine to the desired level. We analyzed previously known data, particularly the amount of mine water pumped from the mine area and the surrounding abandoned mines in the past. Further the evaluation of known surrounding abandoned mines aquifer systems, accumulated in the coal seam (underground accumulation of water) and the evaluation of the effect of increasing the water level in the Kohinoor II mine, focusing on the enlargement of the central mine aquifers and the evaluation of the effects of changes in the way of pumping on the surrounding coal seam and its mining with continued safe brown coal mining at the nearby Bílina mine, that can be ensured for at least another 25 years.

scholarly journals Characterization of ash pond ashes from 3rd thermal power plant by SEM/EDX and XRD methods

2014 ◽  
Vol 14 ◽  
pp. 61-65
Author(s):  
A Minjigmaa ◽  
Ts Zolzaya ◽  
E Bayanjargal ◽  
B Davaabal ◽  
J Temuujin
Keyword(s):  
Chemical Composition ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Coal Combustion ◽  
Thermal Power ◽  
Mineralogical Composition ◽  
Composition Changes ◽  
By Products ◽  
Ash Pond

  Coal combustion by products from ash pond of 3rdthermal power plant of Ulaanbaatar city have been collected in 2010 and 2013 years. The ash samples have been characterized by XRD, XRF and SEM-EDX methods in order to evaluate their chemical and mineralogical composition changes with disposed times. The mineralogical composition of ash varies with time though the chemical composition of the ashes were close each other. Possibly, inefficient operating condition of the TPS shows influence on the mineralogical composition.DOI: http://dx.doi.org/10.5564/mjc.v14i0.201Mongolian Journal of Chemistry 14 (40), 2013, p61-65

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