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    Wyświetlanie 1-3 z 3
    Tytuł:
    Application the optimization models to analysis of the industrial pollutant emission in China
    Autorzy:
    Zhang, Z.
    Liu, G.-D.
    Guo, H.
    Liu, L.
    Deng, S.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/950041.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    industrial emissions
    air pollution
    mathematical models
    sulfur dioxide
    air pollutant emission
    environmental indicators
    industrial pollutants
    smoke emission
    emisja przemysłowa
    zanieczyszczenie powietrza
    model matematyczny
    dwutlenek siarki
    ditlenek siarki
    emisja zanieczyszczeń powietrza
    wskaźniki środowiskowe
    zanieczyszczenia przemysłowe
    emisja dymu
    Opis:
    An industrial planning is made based on the optimization model. Factor analysis was used to reject relativity among the environmental indicators. Then, thirty nine industries were clustered into four clusters. Lastly, optimization model was used to plan the industrial structure. Adjusting the industrial structure, it is difficult to reduce vast SO2, smoke, and dust with total industrial output value growth; the air pollutant emission only can be decreased by 10%. The parameters of smoke emission are limited constrains for the optimization. The reasonable and feasible way to solve the problem is to introduce the lower smoke emission technique of the cluster 2 and 4 industries.
    Źródło:
    Environment Protection Engineering; 2013, 39, 1; 87-99
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of cement and other additives for solidification/stabilization of soil contaminated simultaneously with Cd2+ and Pb2+ ions
    Autorzy:
    Xi, Y.
    Wang, H.
    Guo, L.
    Zhang, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/208172.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cement
    soil pollution
    X-ray diffraction
    dyfrakcja rentgenowska
    zanieczyszczenie gleby
    Opis:
    Various additives, including cement, quicklime, fly ash, montmorillonite, sepiolite and their proportions were employed to stabilize/solidify artificially prepared soils contaminated simultaneously with two kinds of ions such as Cd2+ and Pb2+. The unconfined compressive strength of the stabilized soils was measured to estimate the possibility of recycling. The efficiency of Cd2+ and Pb2+ immobilization in contaminated soils was also evaluated using the US EPA TCLP toxicity test. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to elucidate the mechanisms responsible for the immobilization of heavy metals. The experimental results demonstrate that in terms of soils simultaneously polluted with Cd2+ and Pb2+ ions, the curing effect of fly ash is better than that of montmorillonite and sepiolite. When Cd2+ and Pb2+ coexist in soil specimens, the curing is more difficult than for Cd2+ or Pb2+ alone, which is antagonistic mechanism. Also, the leaching concentration of Cd2+ and Pb2+ gradually decreases upon increasing pH when pH < 8. For pH ≥ 8, the leaching concentration of Cd2+ and Pb2+ reached a minimum. Besides, the results of XRD and SEM are in agreement with those of the strength and leaching tests.
    Źródło:
    Environment Protection Engineering; 2018, 44, 1; 61-73
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorptive performance of MCM-41 towards hg(II) in water. Adsorption and desorption studies
    Autorzy:
    Zhai, Q. Z.
    Hu, W.-H.
    Guo, X.-Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/208154.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    electron microscopy
    mesoporous silicates
    cetyltrimethylammonium bromide
    adsorption conditions
    mikroskopia elektronowa
    krzemiany mezoporowate
    bromek cetyltrimethylammonium
    warunki adsorpcyjne
    Opis:
    MCM-41 mesoporous material was prepared under a standard conditions by using cetyltrime-thylammonium bromide as a structure-directing agent and tetraethyl orthosilicate as silica source from the liquid phase at 80 °C. Powder X-ray diffraction and scanning electron microscopy used to characterize the product, showed that the MCM-41material had an average particle size of 110 nm. The synthesized material was used to investigate the effects of acidity, adsorption time, the concentration of Hg2+, adsorbent dosage and temperature on the adsorption of Hg2+. The results showed that the optimal adsorptive conditions were: pH 5.0, m(MCM-41):mHg2+ 6.67, temperature 20 °C and contact adsorption time 60 min, for the initial Hg2+concentration of 1.0 mg/cm3. The maximum adsorptive amount of Hg2+ was 56.48 mg Hg2+/g MCM-41. The results of the desorptive effect of three desorption agents such as HCl, HNO3 and HAc showed that the best desorbent was HCl at the concentration of 0.10 mol/dm3. The highest desorption efficiency was 77.21% for the desorption time 2 h.
    Źródło:
    Environment Protection Engineering; 2016, 42, 1; 5-15
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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