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Wyszukujesz frazę "heavy metals adsorption" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Modification of Salix americana willow bark for removal of heavy metal ions from aqueous solutions
Autorzy:
Rypińska, Iwona
Biegańska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/779386.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
waste
adsorption
heavy metals
willow bark
methods of modification
Opis:
Salix americana willow bark is a waste arising in the process of wicker decortication that so far has not found Any practical application. The bark can adsorb metal ions, because in its composition among others are phenolic groups which may be involved in the removal of metal ions from water solutions. The results of sorption of copper(II) and zinc(II) on modifi ed willow bark of Salix americana were presented. The bark was modifi ed with nitric and sulfuric acids at concentrations ranging from 5 to 15%. The best adsorption results were obtained using 15% nitric acid for modifi cation. Adsorption of metal ions from aqueous solutions at concentrations raging from 20 to 100 mg/dm3 was studied. It was found that an increase in the initial concentration of copper(II) and zinc(II) resulted in an increase in their adsorption on the modifi ed cortex.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 4; 41-44
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zinc ion adsorption on carbon nanotubes in an aqueous solution
Autorzy:
Ansari, A.
Mehrabian, M. A.
Hashemipour, H.
Powiązania:
https://bibliotekanauki.pl/articles/779155.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
adsorption
molecular dynamics simulation
heavy metals
electrostatic force
interaction energy
functional groups
Opis:
The literature devoted to numerical investigation of adsorption of heavy metal ions on carbon nanotubes is scarce. In this paper molecular dynamics is used to simulate the adsorption process and to investigate the effect of the infl uencing parameters on the rate of adsorption. The predictions of the molecular dynamics simulation show that the adsorption process is improved with increasing the temperature, pH of solution, the mass of nanotubes, and surface modifi cation of CNT using hydroxyl and carboxyl functional groups. The results predicted by the model are compared with the experimental results available in the literature; the close agreement validates the accuracy of the predictions. This study reveals that the water layers around the carbon nanotubes and the interaction energies play important roles in the adsorption process. The study also shows that electrostatic force controls the attraction of zinc ions on the nanotube sidewall.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 3; 29-37
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of agricultural and industrial wastes for metal removal from aqueous solutions
Autorzy:
Biegańska, M.
Cierpiszewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/779295.pdf
Data publikacji:
2011
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
odpady
adsorpcja
metale ciężkie
toksyczność
kora wierzby
izoterma Freundlicha
kinetyka
waste
adsorption
heavy metals
toxicity
wicker bark
Freundlich isotherm
kinetic
Opis:
In this study a possibility of obtaining sorbents from basketry wastes has been investigated. Therefore, adsorption of cadmium ions on wicker bark of Salix americana has been studied. The obtained experimental results were described by the Freundlich equation and adsorption kinetics by the pseudo-second order equation. The effect of pH on cadmium ions adsorption by S. americana was also investigated. It has been found that for the pH values ranging from 2 to 7 cadmium removal from the solution was held at almost constant level.
Źródło:
Polish Journal of Chemical Technology; 2011, 13, 1; 20-22
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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