Temat: mercury" - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Estimated mercury emissions from coal combustion in the households sector in Poland
Autorzy:: Pyka, I.
Wierzchowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/92128.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: mercury in hard coal
mercury load
mercury emission
households sector
rtęć w węglu kamiennym
ładunek rtęci
emisja rtęci
sektor gospodarstw domowych
Opis:: Coal consumption secures more than 50% of needs of Polish economy for primary energy carriers and the consumption of hard coal alone amounts 70-80 million Mg annually. Almost 14% of hard coal consumption - up to 11 million Mg per year - fall to households in Poland. Coal combustion in domestic furnaces and boilers is regarded as the main source of emissions into the atmosphere, referred to as the low-stack emission. The matter of the paper is the assessment of the emission of mercury from the households sector as the result of coal combustion. The results of the assessment were collated with GUS data on mercury emission from this sector. A change in the annual emission of mercury from the household sector has been proposed and justified, assuming that the whole low-stack emission of mercury is the result of coal combustion only.
Źródło:: Journal of Sustainable Mining; 2016, 15, 2; 49-56
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The potential risk of environmental contamination by mercury contained in Polish coal mining waste
Autorzy:: Antoszczyszyn, T.
Michalska, A.
Powiązania:: https://bibliotekanauki.pl/articles/92049.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: mercury content
bituminous coal mining waste
bituminous coal
mercury emission
mercury sources
zawartość rtęci
odpady górnicze
węgiel kamienny
emisja rtęci
źródła rtęci
Opis:: The paper contains reference literature analysis concerning mercury content in Polish bituminous coal and post-mining waste as well as the impact of mercury content on the environment. The aim of the paper was to determine the occurrence of the risk of contamination of the environment with mercury compounds found in demolition bituminous coal landfills. Mercury, due to its toxic properties has been classified among the most dangerous substances to human health. There are three groups of sources of mercury release into the environment: natural, anthropogenic and remission. Coal mining, its processing and use in the energy sector has the greatest relevance regarding the pollution of the environment with mercury compounds in Poland. A review of reference literature shows that the average content of mercury in Polish bituminous coal varies within a wide range of 41e399 ppb, which is conditional on the origin, age and type of coal. The production of coal has led to a number of facilities in the form of structurally and age-varied landfills, heaps and mining waste dumps. The content of mercury in postmining waste is in the range from approximately 55 to 380 ppb. The problem of environmental contamination with mercury has attracted considerable interest due to the effects that its concentration have in the biosphere. On the basis of the existing data it has been found that the content of mercury in soils in areas degraded by mining and processing of coal is even 10e16 times higher, compared to the geochemical background. It is necessary to conduct research in this area due to the limited results of research on mercury content in deposited waste from the preparation and flotation of Polish bituminous coals and the potential harmful effect of mercury on the environment. The paper is dedicated to the mercury content in waste from the extraction and processing of bituminous coal.
Źródło:: Journal of Sustainable Mining; 2016, 15, 4; 191-196
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Environmental, health and safety intricacies of artisanal mining in the gold-rich landscapes of Karamoja, north-eastern Uganda
Autorzy:: Serwajja, Eria
Mukwaya, Paul Isolo
Powiązania:: https://bibliotekanauki.pl/articles/1839058.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: artisanal mining
mercury
gold
health and safety
environment
Uganda
górnictwo rzemieślnicze
rtęć
złoto
BHP
środowisko
Opis:: Artisanal small-scale gold mining presents numerous opportunities for Uganda's rural poor. However, it also poses serious environmental, health and safety challenges. A suite of data collection methods including interviews, focus groups discussions, water and soils sampling were used to examine the perceptions of miners on the status, prevalence and extent of mercury use in artisanal gold mining, mercury transit routes and toxicity levels of soils and water in Karamoja sub-region. It also explores the health, safety and environmental implications of artisanal small-scale gold mining in the sub-region. The findings show that trade and access to mercury is widespread; although trade in, access to and its use is highly secretive. Traders access mercury through a number of ways including smuggling across the porous borderline and formal, but covert, importation. Miners then discreetly access it through undercover sales in jewellery shops and in affluent gated communities in Uganda's capital, Kampala. Soil and water samples showed mercury levels that exceeded the minimum acceptable limits of 0.03 mg/kg and 0.006 mg/l respectively. Further, artisanal small-scale gold mining is associated with massive land clearances and landscape deformations. It has invariably scarred the countryside with piles of waste and uncovered pits that are a source of accidents and ideal breeding grounds for vectors.
Źródło:: Journal of Sustainable Mining; 2021, 20, 2; 90-108
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Study on the effect of coal microscopic pore structure to its spontaneous combustion tendency
Autorzy:: Dong, Xianwei
Li, Gaojing
Dong, Xuanmeng
Wang, Fusheng
Powiązania:: https://bibliotekanauki.pl/articles/2201388.pdf
Data publikacji:: 2022
Wydawca:: Główny Instytut Górnictwa
Tematy:: spontaneous combustion tendency
mercury injection
fractal dimension
indicator gases
tendencja do samozapłonu
porozymetria rtęciowa
wymiar fraktalny
gazy wskaźnikowe
Opis:: Coal is a porous medium. Due to the large number of pores in coal and the pore size on its surface, usually ranging from millimeter to nanometer, it is difficult to measure and analyze the microscopic pore structure of coal. In order to investigate the effect of the microscopic pore structure of coal on its spontaneous combustion tendency, coal samples from different coal mines of the Kailuan Group were selected as the research objects, and the data of the microscopic pore distribution of three different coal samples were measured by using mercury injection apparatus. The regression analysis of microscopic pore data of coal samples obtained in the mercury injection experiment shows that the correlation coefficients of the regression curves are all greater than 0.94 and the fitting degree is good, indicating that there is a good correlation between the pressure, mercury intake and pore size of the coal samples, indicating that the fractal dimension of pore distribution is very effective. The fractal dimension is generally between 2 and 3, indicating that the microscopic pores of coal samples have good fractal characteristics and meet the fractal theory to describe the distribution characteristics of microscopic pores in porous media. Through the simulation system of natural combustion of coal, the simulation experiment of temperature rise oxidation of different coal samples (gas coal, fat coal, and coke coal) was carried out, and the curve of the concentration of gas products CO and CO2 in the process of temperature rise and oxidation of coal samples was drawn in the experiment. The experimental results show the relationship between the distribution structure of coal pores and its spontaneous combustion tendency, and the coal with a good distribution dimension has a stronger combustion tendency.
Źródło:: Journal of Sustainable Mining; 2022, 21, 2; 120--127
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Measuring low mercury content in furnace waste, with ALTECs automatic atomic absorption spectrometer
Autorzy:: Rompalski, P.
Greczichen, A.
Powiązania:: https://bibliotekanauki.pl/articles/92053.pdf
Data publikacji:: 2018
Wydawca:: Główny Instytut Górnictwa
Tematy:: mercury
hard coal
furnace waste
automatic atomic absorption spectrometer
rtęć
węgiel kamienny
odpady paleniskowe
automatyczny spektrometr absorpcji atomowej
Opis:: This article presents the results of comparing mercury content measurements made with the AMA254 automatic atomic absorption spectrometer with measurements obtained using the CVAAS method in a different laboratory. The aim of the article is to show the potential of applying the AMA254 analyzer to measure low mercury content (including trace amounts) without the pre-treatment (mineralization) of the samples. Mercury, as one of the more toxic elements (according to Agency for Toxic Substances and Disease Registry), which is present in hard coal, is the main cause of the problems resulting from the environmental pollution associated with hard coal combustion, as well as storing coal processing waste, such as extractive waste and combustion by-products including slag, ash, and slag-ash mixtures (CBP). Precise measurements of trace mercury content in extractive waste and combustion wastes (CBP) is very important in the context of the act on waste (2008 and 2013), BAT regulations 2016 and new BAT regulations (coming into force by 2021), which introduce more and more rigorous limits on mercury emission into the environment. The AMA254 analyzer performs analysis in a short period of time (approximately 5 min), enables repeatability, is intuitive to use and has very high accuracy and precision (the lower limit of quantification is 0.00001 μg Hg), is an ideal tool for measuring low mercury content in samples of both fuels and coal processing waste.
Źródło:: Journal of Sustainable Mining; 2018, 17, 4; 195-201
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of the temperature of different combustion zones in the boiler grate on changes in physical and chemical parameters of bituminous coal and slags
Autorzy:: Rompalski, P.
Róg, L.
Powiązania:: https://bibliotekanauki.pl/articles/91909.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: physical parameters
chemical parameters
mercury
boiler grate
bituminous coal
slag
parametry fizyczne
parametry chemiczne
rtęć
ruszt kotła
węgiel kamienny
żużel
Opis:: This paper presents the results of a study on the influence of the temperature of characteristic zones of coal combustion in a stoker fired boiler (drying, degassing, and burn-out), on changes in physical and chemical parameters of bituminous coal and slags. This information is important as it helps identify the impact of coal properties on the accumulation of trace elements, primarily mercury, in combustion waste. The study is the continuation of research work on the impact of mercury compounds accumulated in combustion waste on the natural environment (mercury from landfills of slag, and fly ash). Studies were undertaken because no in-depth analysis of the impact of the temperature of particular zones of stoker fired boilers on the physical and chemical parameters of the post-process slag, including mercury content, had been reported in literature. Both of the coals examined, classified as bituminous coal according to the International Classification of Seam Coals and of type 32.1 according to the PN-G97002:1982 standard, showed an average mercury content of 0.0849 mg/g. In the chemical composition determined for the ash derived from burnt coal, the dominance of SiO2 and Al2O3 over other oxides was found. This feature results in the increase of the softening temperature and ash melting and, therefore, during the combustion of coal tested in a stoker fired boiler, only ash was subjected to the sintering process. Mercury content in the other examined samples taken from various locations of the stoker fired boiler (drying – 32-1050 ºC, degassing – 1050-1020 ºC, and burn-out – 1020-400 ºC) varied from 0.0668 to 0.0009 mg/g and was determined with the use of a LECO atomic absorption spectrometer. The analyses of the elemental composition, performed with the application of XRF spectrometry, for ash obtained from samples collected from different sampling points of the stoker fired boiler showed that the largest concentration of trace elements was observed for the ash derived from the samples collected in the degassing zone (temperature range 1050-850 ºC).
Źródło:: Journal of Sustainable Mining; 2016, 15, 2; 66-72
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The hazardous nature of small scale underground mining in Ghana
Autorzy:: Bansah, K. J.
Yalley, A.B.
Dumakor-Dupey, N.
Powiązania:: https://bibliotekanauki.pl/articles/92035.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: small scale mining
safety
human health
mercury amalgamation
environment
underground
wydobycie na małą skalę
bezpieczeństwo
zdrowie ludzkie
amalgamat rtęci
środowisko
podziemia
Opis:: Small scale mining continues to contribute significantly to the growth of Ghana's economy. However, the sector poses serious dangers to human health and the environment. Ground failures resulting from poorly supported stopes have led to injuries and fatalities in recent times. Dust and fumes from drilling and blasting of ore present health threats due to poor ventilation. Four prominent small scale underground mines were studied to identify the safety issues associated with small scale underground mining in Ghana. It is recognized that small scale underground mining in Ghana is inundated with unsafe acts and conditions including stope collapse, improper choice of working tools, absence of personal protective equipment and land degradation. Inadequate monitoring of the operations and lack of regulatory enforcement by the Minerals Commission of Ghana are major contributing factors to the environmental, safety and national security issues of the operations.
Źródło:: Journal of Sustainable Mining; 2016, 15, 1; 8-25
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: “Small in size, but big in impact”: socio-environmental reforms for sustainable artisanal and small-scale mining
Autorzy:: Owusu, Obed
Bansah, Kenneth Joseph
Mensah, Albert Kobina
Powiązania:: https://bibliotekanauki.pl/articles/92012.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: artisanal and small-scale mining
environmental pollution
environmental sustainability
ASM
livelihood
mercury
heavy metals
górnictwo tradycyjne i na małą skalę
zanieczyszczenie środowiska
zrównoważoność środowiskowa
utrzymanie
rtęć
metale ciężkie
Opis:: Artisanal and small-scale mining (ASM) - small sized, largely unrecognized, rudimentary, and an informal form of mining - occurs in more than 70 countries around the world and is mainly hailed for its socioeconomic benefits and reviled for its environmental devastation. As a result, many people are confused about the future of ASM. In Ghana, the government banned ASM in 2017 and formed a security taskforce drawn from the military and police to crack down on nomadic and local ASM workers who defy the ban. This approach is unsustainable, deals less with the fundamental problems, and increases poverty among the already impoverished local populations who depend on this type of mining as their only means of livelihood. To support the argument for sustainable reforms, revenue growth decomposition and growth accounting analyses were performed to determine the factors shaping ASM revenue over 25 years (1990-2016). Results show that production (gold output) is the most important factor that influences revenue growth from ASM, contrary to the usual view that the price of the metal is mainly responsible for the increase in revenue. Thus, increasing labor hours in ASM could significantly increase mining revenue, reduce unemployment, and improve local commerce. We strongly conclude that sustainable reforms such as increasing local participation in decision making, education and training, adoption of improved technology, strengthening regulatory institutions, legislation and enforcement of enactments, and the provision of technical support and logistics could ensure socio-environmental sustainability.
Źródło:: Journal of Sustainable Mining; 2019, 18, 1; 38-44
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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