Preservation of geochemical markers during co-combustion of hard coal and various domestic waste materials

2020 ◽  
pp. 144638
Author(s):  
Ewelina Cieślik ◽  
Monika J. Fabiańska
Keyword(s):  
Waste Materials ◽  
Hard Coal ◽  
Domestic Waste ◽  
Geochemical Markers

scholarly journals EVALUATION OF HAZARDS OF WASTE MATERIALS IN CLINICS AND HOSPITALS: A RESEARCH

2014 ◽  
Vol 04 (03) ◽  
pp. 011-014
Author(s):  
Ram Kumar Srivastava ◽  
Iqbal Ali ◽  
Puneet Wadhawani ◽  
Anand Kumar ◽  
Praveen Awasthi
Keyword(s):  
Health Care ◽  
Health Risk ◽  
Human Activities ◽  
Development Project ◽  
Waste Materials ◽  
Residential Areas ◽  
Domestic Waste ◽  
Urban Waste ◽  
Rural And Urban ◽  
Health Care Waste

AbstractWastes from the cities and villages cannot be avoided from man's existence. It is essential to safely put these unwanted or discarded material away, in the interest of the community. During human activities a lot of waste matter is produced due to various development project, industrialization and modernization of the community. In this study waste materials were collected from various hospitals and rural and urban residential areas. These wastes were divided into two main categories- Health care waste and domestic waste. The survey indicated 80% solid waste deals with the domestic and urban waste while only 20% deals with the health care waste. The health care waste is regarded hazardous and may cause a variety of health risk.

scholarly journals REAL-SIZE MODEL CONSTRUCTION OF THE CONCRETE USING MOLTEN SLAG FINE AGGREGATE RECYCLED FROM DOMESTIC WASTE(Materials and Construction)

2004 ◽  
Vol 10 (20) ◽  
pp. 1-6
Author(s):  
Takeshi SAITO ◽  
Yoshihisa NAKATA ◽  
Hiroki SATO ◽  
Noriyuki TANIYAMA ◽  
Akira NEMOTO ◽  
...  
Keyword(s):  
Molten Slag ◽  
Model Construction ◽  
Waste Materials ◽  
Fine Aggregate ◽  
Domestic Waste ◽  
Real Size ◽  
Size Model

SANITARY-HYGIENIC DISTINCTIONS OF THE APPLICATION OF PROBIOTICS FOR THE TREATMENT OF SOLID DOMESTIC WASTE

2019 ◽  
Vol 2019 (69) ◽  
pp. 82-87
Author(s):  
V.V. Stankevych ◽  
◽  
I.O. Teteniova ◽  
◽  
◽  
...  
Keyword(s):  
Domestic Waste ◽  
Solid Domestic Waste

Reuse of Treated Domestic Waste Water in Concrete - A Sustainable Approach

2011 ◽  
Vol 4 (4) ◽  
pp. 182-184 ◽  
Author(s):  
Prof. A.B. More Prof. A.B. More ◽  
◽  
Prof. R. B. Ghodake Prof. R. B. Ghodake ◽  
Himanshu. N. Nimbalkar ◽  
Pritam. P. Chandake ◽  
...  
Keyword(s):  
Waste Water ◽  
Domestic Waste

The Influence of Disintegration of Hard Coal Varieties of Different Metamorphism Grade on the Amount of Sorbed Ethane / Wpływ rozdrobnienia odmian węgla kamiennego o różnym stopniu metamorfizmu na ilości sorbowanego etanu

2013 ◽  
Vol 58 (2) ◽  
pp. 449-463 ◽  
Author(s):  
Mieczysław Żyła ◽  
Agnieszka Dudzińska ◽  
Janusz Cygankiewicz
Keyword(s):  
Sorption Isotherms ◽  
Electron Donors ◽  
Hard Coal ◽  
Coal Surface ◽  
Compact Layer ◽  
Compact Structure ◽  
Small Surface ◽  
Mining Works ◽  
The Impact ◽  
Content Of Oxygen

Ethane constitutes an explosive gas. It most often accompanies methane realizing during exploitation and mining works. In this paper the results of ethane sorption have been discussed on three grain classes of six selected hard coal samples collected from active Polish coalmines. On the basis of obtained results, it has been stated that the tested hard coals prove differentiated sorption power with reference to ethane. Te extreme amount of ethane is sorbed by low carbonized hard coal from “Jaworzno” coalmine. This sort of coal shows great porosity, and great content of oxygen and moisture. The least amount of ethane is sorbed by hard coal from “Sośnica” coalmine. This sort of coal possesses relatively a great deal of ash contents. Together with the process of coal disintegration, the amount of sorbed ethane increases for all tested coal samples. Between tested coals there are three medium carbonized samples collected from “Pniówek”, “Chwałowice” “Zofiówka” coalmines which are characterized by small surface values counted according to model BET from nitrogen sorption isotherms determined at the temperature of 77.5 K. The samples of these three coals prove the highest, from between tested coals, increase of ethane sorption occurring together with their disintegration. These samples disintegrated to 0,063-0,075 mm grain class sorb ethane in the amount corresponding with the sorption quantity of low carbonized coal from “Jaworzno” coalmine in 0.5-0.7 mm grain class. It should be marked that the low carbonized samples collected from “Jaworzno” and Wesoła” coalmines possess large specific surface and great porosity and belong to coal group of “loose” spatial structure. Regarding profusion of sorbed ethane on disintegrated medium carbonized samples from “Pniówek”, “Zofiówka”, “Chwałowice” coalmines it can be supposed that in the process of coal disintegration, breaking their “compact’ structure occurs. Loosened structure of medium carbonized coals results in increasing accessibility of ethane particles to sorption centres both electron donors and electron acceptors which are present on hard coal surface. The surface sorption centre increase may result in formation a compact layer of ethane particles on coal surface. In the formed layer, not only the strengths of vertical binding of ethane particles with the coal surface appear but also the impact of horizontal strengths appears which forms a compact layer of sorbed ethane particles. The surface layer of ethane particles may lead to explosion.

The Influences of the Rank of Coal on Methane Sorption Capacity in Coals/Wpływ Rzędu Węgla Na Pojemność Sorpcyjną Metanu W Węglach

2014 ◽  
Vol 59 (2) ◽  
pp. 509-516
Author(s):  
Andrzej Olajossy
Keyword(s):  
Sorption Capacity ◽  
Coalbed Methane ◽  
Vitrinite Reflectance ◽  
Sorption Isotherms ◽  
Volatile Matter ◽  
Low Rank ◽  
Hard Coal ◽  
Petrographic Composition ◽  
Methane Sorption ◽  
Indian Coals

Abstract Methane sorption capacity is of significance in the issues of coalbed methane (CBM) and depends on various parameters, including mainly, on rank of coal and the maceral content in coals. However, in some of the World coals basins the influences of those parameters on methane sorption capacity is various and sometimes complicated. Usually the rank of coal is expressed by its vitrinite reflectance Ro. Moreover, in coals for which there is a high correlation between vitrinite reflectance and volatile matter Vdaf the rank of coal may also be represented by Vdaf. The influence of the rank of coal on methane sorption capacity for Polish coals is not well understood, hence the examination in the presented paper was undertaken. For the purpose of analysis there were chosen fourteen samples of hard coal originating from the Upper Silesian Basin and Lower Silesian Basin. The scope of the sorption capacity is: 15-42 cm3/g and the scope of vitrinite reflectance: 0,6-2,2%. Majority of those coals were of low rank, high volatile matter (HV), some were of middle rank, middle volatile matter (MV) and among them there was a small number of high rank, low volatile matter (LV) coals. The analysis was conducted on the basis of available from the literature results of research of petrographic composition and methane sorption isotherms. Some of those samples were in the form (shape) of grains and others - as cut out plates of coal. The high pressure isotherms previously obtained in the cited studies were analyzed here for the purpose of establishing their sorption capacity on the basis of Langmuire equation. As a result of this paper, it turned out that for low rank, HV coals the Langmuire volume VL slightly decreases with the increase of rank, reaching its minimum for the middle rank (MV) coal and then increases with the rise of the rank (LV). From the graphic illustrations presented with respect to this relation follows the similarity to the Indian coals and partially to the Australian coals.

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