Temat: PAN/MWCNT - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Effect of the Type of Admixture on the Properties of Polyacrylonitrile Membranes Modified With Nanotubes, Graphene Oxide and Graphene
Autorzy:: Fryczkowska, B.
Przywara, L.
Powiązania:: https://bibliotekanauki.pl/articles/124223.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: composite membranes
PAN/GO
PAN/RG
PAN/MWCNT
ultrafiltration
electroplating waste water
Opis:: This paper presents the results of research on the production of composite polyacrylonitrile (PAN) membranes with nanotubes (MWCNT), graphene (RG) and graphene oxide (GO) addition. All of the specified additions differ diametrically in terms of properties, starting from the spatial structure of the particles, to the chemical properties. The membranes were obtained using phase inversion method from a solution of N,N-dimethylformamide (DMF). Subsequently, the impact of the nano-addition on the transport and separation properties of the membranes was investigated using Millipore AMICON ultrafiltration kit. Membranes with graphene addition (PAN/RG) are characterized by the best transport properties and the highest specific permeate flux values in the range of ~913÷1006 dm³/m2×h for the working pressure of 2.0 MPa. In order to test the separation properties, electroplating wastewater generated in one of the Silesian galvanizing plants was used. The qualitative and quantitative composition of the wastewater was tested by means of UV-Vis spectrophotometer (HACH) and absorption atomic spectrometry (AAS). The ultrafiltration process carried out on composite membranes allows for the complete removal of phosphate ions and ~88÷94% removal of iron from the waste water. The rejection coefficient of the remaining metals is high: ~35÷85% for copper and ~17÷100% for cadmium.
Źródło:: Journal of Ecological Engineering; 2017, 18, 5; 72-81
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Zastosowanie membran MWCNT/PAN do usuwania metali ciężkich
Application of MWCNT/PAN membranes for heavy metals removal
Autorzy:: Przywara, Lucyna
Powiązania:: https://bibliotekanauki.pl/articles/2064440.pdf
Data publikacji:: 2021
Wydawca:: Akademia Techniczno-Humanistyczna w Bielsku-Białej
Tematy:: composite membranes MWCNT/PAN
heavy metals
ultrafiltration
membrany kompozytowe MWCNT/PAN
metale ciężkie
ultrafiltracja
Opis:: The paper presents results of research on the production, properties and application of polyacrylonitrile (PAN) based membranes with the addition of multi-wallet carbon nanotubes (MWCNT) for the removal of heavy metals such as lead, zinc, cobalt and nickel from water and wastewater. The introduction of the MWCNT additive into the PAN matrix slowed down the membrane coagulation process, which resulted in an increase in their mass per unit area, thickness, apparent density and porosity, pore size of the membranes and improved the transport and separation properties. PAN membranes were obtained using phase inversion method. First, a 12% solution of PAN in DMF was prepared. Membrane-forming solutions containing 0.1, 0.5, and 1.0% of MWCNT respectively were prepared to form MWCNT/PAN composite membranes. Of all the composite membranes MWCNT/PAN obtained, the membrane “1” was characterized by the best properties. The pure water flux through membrane “1” was 9-12 fold higher than in the unmodified membrane (“0”). Performing structural tests enabled to explain phenomena observed during physicochemical properties tests. When analyzing the SEM photomicrographs (cross-section, bottom layer), it can be reported that the best structural is characterized by membrane “1”. The satisfactory results of transport membrane research encouraged to analyze the separation properties of composite membranes MWCNT/PAN. In order to test the separation properties, water with individual ions and ions in the electroplating wastewater was analyzed in terms of the use of the membranes for heavy metals removal. The examination of water individual ions was determined by atomic absorption spectrometry showed that only Zn2+ and Co2+ ions were completely removed (100%) on each of the membranes obtained in the experiment. The degree of heavy metals removal for all the obtained membranes and for subsequent ions was estimated at: 100% (Co2+), 70-100% (Zn2+), 65-100% (Ni2+) and 62-100% (Pb2+) for water and wastewater. The yielded results may indicate the occurrence of competitive reactions leading to preferential removal of metals from the electroplating wastewater.
Źródło:: Polish Journal of Materials and Environmental Engineering; 2021, 2(22); 5-14
2720-1252
Pojawia się w:: Polish Journal of Materials and Environmental Engineering
Dostawca treści:: Biblioteka Nauki

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