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    Wyświetlanie 1-9 z 9
    Tytuł:
    Influence of land use on plant community composition in Vysocina Region grasslands, Czech Republic
    Autorzy:
    Winkler, Jan
    Mazur, Łukasz
    Smékalová, Marta
    Podlasek, Anna
    Hurajová, Erika
    Koda, Eugeniusz
    Jiroušek, Martin
    Jakimiuk, Aleksandra
    Vaverková, Magdalena Daria
    Powiązania:
    https://bibliotekanauki.pl/articles/2171843.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sulfur dioxide
    nitrogen oxides
    meteorological factors
    humidity
    dwutlenek siarki
    tlenki azotu
    czynnik meteorologiczny
    wilgotność
    Opis:
    Human disturbance is an important factor in forming vegetation. According to our hypothesis, anthropogenic activity and changes in the species composition of grass communities occur in the process of co-evolution. Understanding co-evolution, to better predict future changes in the entire ecosystem. Five grassland sites were selected with different methods of use and hence different anthropogenic disturbance regimes. The results show that the composition of grassland communities responds to the methods of their use. The needs and demands of our civilization are changing. Humans co-create plant communities the preservation of which depends on their use by humans.
    Źródło:
    Environment Protection Engineering; 2022, 48, 4; 21--33
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous removal of SO2 and NOx from sintering flue gas using ammonia-Fe(II)EDTA combined with electrolytic regeneration
    Autorzy:
    Liang, Y.
    Yao, X.
    Quin, L.
    Chen, W.
    Han, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/208117.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ammonia
    desulfurization
    flue gases
    nitrogen oxides
    nitrogen removal
    sintering sulfur dioxide
    amoniak
    odsiarczanie
    gazy odlotowe
    tlenki azotu
    usuwanie azotu
    spiekanie
    ditlenek siarki
    Opis:
    Sulfur dioxide and nitrogen oxide are health hazardous gases, which contribute to the formation of submicron acidic particulates. To reduce SO2 and NOx emission from the sintering flue gas, the combination of ammonia-Fe(II)EDTA solution scrubbing with Fe(III) electrolytic regeneration is proposed. The above method has the following advantages: direct conversion of NOx and SO2 to harmless N2 and SO4 2−, recovery of the by-product (NH4)2SO4), simultaneous removal of NOx and SO2 emission from flue gas in the reactor. The effect of the pH, initial Fe(II)EDTA concentration, and voltage on the desulfurization and denitration efficiencies was investigated using a bench-scale reactor. The maximal desulfurization and denitration efficiencies were 98% and 52%, respectively. The optimum parameters were pH ˃ 5.0, 2.1 V, and 0.05 mol·dm–3 Fe(II)EDTA concentration. SO2 and NOx removal from the sintering flue gas by ammonia-Fe(II)EDTA solution scrubbing combined with electrolytic regeneration was also demonstrated in a pilot-scale reactor.
    Źródło:
    Environment Protection Engineering; 2018, 44, 2; 19-36
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gaseous pollutant emissions from burning animal by-products
    Autorzy:
    Bujak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/208050.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    agricultural wastes
    animals
    carbon
    heavy metals
    nitrogen oxides
    sulfur dioxide
    waste treatment
    odpady rolne
    zwierzęta
    produkty uboczne
    metale ciężkie
    tlenki azotu
    dwutlenek siarki
    unieszkodliwianie odpadów
    Opis:
    Gaseous emissions during thermal animal waste treatment in a meat production plant have been determined. A dry flue gas system with a multisectional bag filter was installed at a meat production plant. Animal waste was incinerated in a rotary kiln, the capacity of the plant was 700 kg/h. The average thirty-minute (1352 samples) emission values of volatile dust, total organic carbon (TOC), hydrogen chloride (HCl), hydrogen fluoride (HF), sulfur dioxide (SO2), nitrogen oxide (NO), nitrogen dioxide (NO2) and carbon oxide (CO) were obtained during a study period of 1 month. Specific samples were collected to determine dioxin, furane, heavy metal, mercury, cadmium and thallium concentrations. Histograms of the obtained results were prepared, and the results were compared with the permissible emission levels defined by the European Union. Additionally, justification was provided when the observed values exceeded the levels defined by the European Union.
    Źródło:
    Environment Protection Engineering; 2016, 42, 3; 125-141
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concentrations of carbon monoxide and nitrogen oxides from a 15 kW heating boiler supplied periodically with a mixture of sunflower husk and wood pellets
    Autorzy:
    Juszczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/207042.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    pelletizing
    carbon monoxide
    combustion chambers
    flue gases
    nitrogen oxides
    pollutant concentration
    heating boiler
    granulowanie
    tlenek węgla
    komory spalania
    gazy spalinowe
    tlenki azotu
    stężenie zanieczyszczeń
    kocioł grzewczy
    Opis:
    The impact of periodic feeding mode on the concentrations of carbon monoxide (CO) and nitrogen oxides (NO, NOx) in the flue gas downstream the boiler was analyzed during firing of a mixture of sunflower husk and wood pellets in an overfeed furnace. The mixtures containing 100, 70 and 50 wt. %, of sunflower husk pellets were supplied to the boiler in two feeding modes: 1 s of operation 4 s of stand-by and 1s of operation 6 s of stand-by. Correlation between pollutant concentrations and the temperature in the combustion chamber was evaluated. The following concentrations of CO for various feeding modes and sunflower husk pellet proportions have been obtained: 1:6,100% - 6150 mg/m3,1:6,70% - 3360 mg/m3, 1:6, 50% - 2600 mg/m3, 1:4,100% - 4580 mg/m3,1:4, 70% - 2570 mg/m3, 1:4,50% - 870 mg/m3 for 10% O2 content in the flue gas. The study indicates the advisability of reducing the stand-by period in the pellet feeding system.
    Źródło:
    Environment Protection Engineering; 2014, 40, 2; 65-74
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On CO and NOx emission in the kinetic combustion of propane/natural gas mixtures
    Autorzy:
    Jerzak, W.
    Kalicka, Z.
    Kawecka-Cebula, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/208058.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    combustion
    gas mixtures
    propane
    carbon oxide
    CO concentrations
    nitrogen oxides
    combustion gas
    kinetic combustion
    spalanie
    mieszanina gazów
    propan
    tlenek węgla
    stężenie CO
    tlenki azotu
    spaliny
    kinetyka spalania
    Opis:
    Concentrations of CO and NOx during combustion of propane/natural gas mixtures in air and in air enriched with oxygen have been investigated. The mixtures were: low-propane (up to 10 vol. %) and high-propane (up to 45 vol. %) types. A large effect of the propane content on the CO concentration in combustion gases was observed; stronger for the low-propane mixtures. The increase in the NOx concentration with increasing propane content was lower and similar for the two types of mixtures.
    Źródło:
    Environment Protection Engineering; 2015, 41, 3; 87-100
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Catalytic reduction of nitrous oxide at a nitric acid plant in Bulgaria
    Autorzy:
    Stefanova, M.
    Chuturkova, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/207530.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    catalysts
    chemical plants
    emission control
    nitric acid
    nitrogen oxides
    catalytic decomposition
    catalytic reduction
    nitrous oxide
    industrial emissions
    katalizatory
    zakłady chemiczne
    kontrola emisji
    kwas azotowy
    tlenki azotu
    rozkład katalityczny
    redukcja katalityczna
    podtlenek azotu
    emisje przemysłowe
    Opis:
    A nitric acid plant in Devnya, Bulgaria has implemented a project for catalytic decomposition of nitrous oxide which resulted in reducing N2O emissions from the plant and the overall N2O emissions from the industrial sector in Bulgaria. After implementing the catalyst in September 2005 till the end of 2011, a total amount of 3133 Mg N2O emissions has been measured while the supposed value of N2O emissions without the catalyst being installed would have been 9747 Mg which means a total reduction of 6614 Mg. The results from the research prove the emission reduction potential of the catalyst.
    Źródło:
    Environment Protection Engineering; 2014, 40, 3; 87-97
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of air pollution on visibility in urban conditions. Warsaw case study
    Autorzy:
    Majewski, G.
    Czechowski, P O
    Badyda, A.
    Brandyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/207001.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    visibility
    air pollution
    pollutants
    mathematical models
    nitrogen oxides
    sulfur dioxide
    urban conditions
    urban air pollution
    urban atmosphere
    particle matter (PM)
    przejrzystość powietrza
    zanieczyszczenie powietrza
    modele matematyczne
    tlenki azotu
    zanieczyszczenia
    dwutlenek siarki
    warunki miejskie
    pyły zawieszone
    Opis:
    The influence of air pollutants on visibility in Warsaw Agglomeration has been investigated. Following pollutants were considered: PM10, SO2, NO2 and O3, while meteorological parameters included: air temperatures (mean, minimum, maximum), solar radiation, relative air humidity, rainfall rates and wind speed. Initial analyses were performed with the use of principal component analysis (PCA). In next stages, the logistic regression (LR), the analysis of variance (ANOVA), one-way classification and a model path of generalized regression models (GRM) were applied. PCA analysis showed that in the cold season the visibility index depends on PM10, SO2, NO2 and the temperatures: T, Tmin, and Tmax. In the warm season, the index of visibility is mostly shaped by four elements: O3, T, Tmax and solar radiation. Logistic regression model indicated that in the warm season only two variables are significantly related to visibility: PM10 and relative humidity of air. Regularities in the cold season shown by the LR correspond with the conclusions from the PCA. Among meteorological conditions, the most important is air temperature, but only Tmax preserves the same direction of influence as the one pointed by the PCA model.
    Źródło:
    Environment Protection Engineering; 2014, 40, 2; 47-64
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous removal of NOx, SO2, CO and Hg from flue gas by ozonation. Pilot plant studies
    Autorzy:
    Głomba, M.
    Kordylewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/950039.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    carbon dioxide
    flue gases
    ozone
    ozonization
    pilot plants
    sulfur dioxide
    gas absorption
    NOx removal
    So2 removal
    CO removal
    dwutlenek węgla
    tlenki azotu
    spaliny
    ozon
    ozonowanie
    instalacje pilotażowe
    dwutlenek siarki
    absorpcja gazu
    usuwanie NOx
    usuwanie SO2
    usuwanie CO
    Opis:
    The results of pilot plant investigations of simultaneous removal of NOx, SO2 and Hg from flue gas with ozone as the oxidizing agent and the spray tower absorber with NaOH solution as the absorbent have been presented. Flue gas was delivered into the pilot plant at the flow rate of 200 m3/h from the coal fired OP-430 boiler. The effectiveness of NOx removal was over 95% when the molar ratio O3/NO reached 2.0. Sulfur dioxide was practically completely washed out from flue gas in the absorber at the liquid-to-gas ratio 7.5 dm3/m3. The effectiveness of Hg removal in the studied system was approximately 80%. It was pointed out that CO concentration in flue gas could considerably increase the ozone consumption. The effect of carbon dioxide in flue gas on the chemistry of absorption due to hydroxides conversion into carbonates and bicarbonates was noticed.
    Źródło:
    Environment Protection Engineering; 2014, 40, 3; 113-125
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study on environmental emissions and performance of a stationary type diesel engine fuelled with biodiesels derived from two different feedstocks
    Autorzy:
    Sairam, K.
    Gopinath, A.
    Velraj, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/207424.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    biodiesel
    biopaliwo
    silniki wysokoprężne
    oleje napędowe
    paliwa
    tlenki azotu
    emisja tlenku węgla
    silniki Diesla o wtrysku bezpośrednim
    zanieczyszczenie środowiska
    emisja tlenków azotu
    sprawność cieplna
    biodiesel fuel
    carbon monoxide
    diesel engines
    diesel fuels
    fuels
    nitrogen oxides
    carbon monoxide emission
    direct injection diesel engines
    environmental emissions
    nitrogen oxides emission
    thermal efficiency
    Opis:
    The objective of the present study was to experimentally investigate environmental emissions and performance of a stationary type diesel engine fuelled with biodiesels derived from two different feedstocks; one is more unsaturated (rice bran biodiesel) and the other one is more saturated in nature (palm biodiesel) and compare with petrodiesel. Tests were conducted in a single cylinder, air cooled, direct injection diesel engine. From the experimental results, it was found that the nitrogen oxides emissions were higher with biodiesel fuels. The hydrocarbon and carbon monoxide emissions of palm biodiesel were lower than the other test fuels. The smoke emission of rice bran biodiesel was the lowest compared to the rest of the fuels. A considerable reduction in thermal efficiency was found with both the biodiesels when compared to diesel. From the present study, it is concluded that the biodiesels derived from palm and rice bran oils with their different fatty acid composition, show lower exhaust emissions and closer performance characteristics to diesel.
    Źródło:
    Environment Protection Engineering; 2013, 39, 4; 113-124
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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