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Wyświetlanie 1-2 z 2
Tytuł:
Assessment of heavy metals inactivation in contaminated soil by coal fly and bottom ashes
Autorzy:
Diatta, Jean
Fojcik, Edward
Drobek, Leszek
Spiżewski, Tomasz
Krzesiński, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/127625.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
fly ash
bottom ash
soil
heavy metals
inactivation
remediation
Opis:
The study compared coal fly and bottom ashes for their ability to inactivate metals and lead to soil remediation. Soil was artificially contaminated with Cu, Zn, Pb and Cd at five degrees. Next, both ashes were added at five rates: 0, 0.5, 1.0, 1.5 and 2.0% and all treatments incubated. Data showed that for moderately contaminated soils, ash rates of 0.5 – 1.0% were efficient from 40 to 70% for Zn and Cd, and raised markedly to between 70 and 93% for Cu and Pb. For extremely contaminated soils, the rates of ashes at 1.0, 1.5 and 2% were much more efficient (60 – 80%). The use of fly and bottom ashes for metal inactivation and soil remediation should give greater consideration to the effect of pH and the type of heavy metals than the content of SiO2 and Al2O3. Fly ash displayed superior inactivation and remediation effects to the bottom ash.
Źródło:
Mineralogia; 2017, 48, 1/4; 127-143
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of gas exchange to leaf piercing explained by piecewise linear regression for two developmental forms of rape plant (Brassica napus L. ssp. oleifera Metzg)
Autorzy:
Wenda-Piesik, Anna
Krzesiński, Włodzimierz
Nowak, Agnieszka
Kazek, Maciej
Tomaszewska-Sowa, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/952014.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
leaf piercing response
oilseed rape
net photosynthetic rate
transpiration
stomatal conductance
concentration of intercellular co2
Opis:
Oilseed rape (Brassica napus L. ssp. oleifera Metzg) was the subject of the study in two forms: winter cv. ‘Muller’ (at the rosette stage – the first internode BBCH 30 – 31) and spring cv. ‘Feliks’ (at the yellow bud stage BBCH 59). The main gas-exchange parameters, net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (gs), and intercellular CO2 concentration (Ci) were measured on leaves prior to the piercing and immediately after the short-term piercing. The effect of mechanical wounding revealed different progress of the gas exchange process for the two forms. Piecewise linear regression with the breakpoint estimation showed that the plants at the same age but at a different vegetal stage, manage mechanical leaf-piercing differently. The differences concerned the stomatal conductance and transpiration changes since for rosette leaves the process consisted of five intervals with a uniform direction, while for stem leaves - of five intervals with a fluctuating direction. These parameters got stabilized within a similar time (220 mins) for both forms. The process of net photosynthetic rate was altered by the plant stages. ‘Muller’ plants at the rosette stage demonstrated dependence of PN on time in log-linear progression: y (PN) = 8.01+ 2.73 log10 (x t2); 7 < t2 < 220; R2 = 0.96. For stem leaves of ‘Feliks’ plants the process of transpiration, in terms of directions, was convergent with the process of photosynthesis. Those two processes were synchronized from 1st to 114th min of the test (r = 0.85; p < 0.001) in plants at the rosette stage and from 26th to 148th min in stem leaves (r = 0.95; p < 0.001).
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2017, 59, 1
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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