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    Wyświetlanie 1-8 z 8
    Tytuł:
    Potential of various materials for adsorption of micropollutants from wastewater
    Autorzy:
    Kamińska, G.
    Bohdziewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/208072.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sorption
    nanomaterials
    bisphenol A
    sorpcja
    nanomateriały
    bisfenol A
    Opis:
    Performance of various materials such as activated carbons, carbon nanotubes, fullerene, and aluminosilicate for aquatic adsorption of micropollutants has been compared. Micropollutants (bisphenol A (BPA) and nonylphenol (NP)) were removed from artificial effluent which was spiked with standards of those chemicals. It was found that nonylphenol was more favorable adsorbed by all the sorbents than BPA. The higher adsorption capacities for BPA and NP showed single walled carbon nanotubes and activated carbon (AKPA). Slightly lower removal efficiencies of the studied micropollutants were observed for the multi-walled carbon nanotubes and activated carbon SX2. Taking into account the porous structure of the sorbents, it can be concluded that the materials containing mesopores had lower sorption capacities for BPA and NP than materials with microporous structure. Ad-sorption of micropollutants was much quicker for the carbon nanotubes than for the activated carbon.
    Źródło:
    Environment Protection Engineering; 2016, 42, 4; 161-178
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected methodological aspects of determination of the water desorption curves of superabsorbents
    Autorzy:
    Pora, E.
    Kaszubkiewicz, J.
    Kawałko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/207819.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    water retention
    superabsorbents
    hydrogels
    water desorption
    water sorption
    retencja wody
    superabsorbenty
    hydrożele
    desorpcja wody
    sorpcja wody
    Opis:
    Research into water retention of superabsorbents is a relatively recent phenomenon, and its methodology has not yet been fully elaborated. Our results suggest considerable water retention dynamics of superabsorbents in the range of small potentials. In the study, three methods of water retention measurements have been compared for 4 selected superabsorbents from the group of cross-linked polymers. The measurement problems faced during the analysis have been revealed such as those resulting from the specificity of the examined material, e.g. the influence of the pressure of the sorbent layer from the upper parts of the samples, as well as the difference between mechanisms of water sorption and desorption processes.
    Źródło:
    Environment Protection Engineering; 2015, 41, 4; 37-48
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of selected organic compounds on modified activated carbons
    Autorzy:
    Okoniewska, E.
    Lach, J.
    Ociepa, E.
    Stępniak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/207870.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    activated carbon
    organic compounds
    sorption
    removal of organic compounds
    węgiel aktywowany
    związki organiczne
    sorpcja
    usuwanie związków organicznych
    Opis:
    The presented work attempted to modify activated carbons with ultrasonic field and evaluate the efficiency of sorption of organic compounds on the obtained modified activated carbons. The results showed that the applied procedure had a positive effect on the removal of the investigated substance. In the case of removal of benzoic and phthalic acids, the highest sorption capacities were obtained for activated carbons modified with ultrasonic waves with the amplitude of 100% and the exposure time of 5 min. The removal efficiency for both acids was approximately 80% at the initial pH and 65% at pH = 8.0. Sorption of imidazole on modified activated carbons showed that lower final concentration was obtained for activated carbons modified with ultrasounds at the amplitude of 100%. The time of exposure to ultrasounds did not have a significant effect on reducing final concentrations. The average removal degree was approximately 45%. Sorption of phenol showed that the average degree of removal was approximately 80% for the solution of the initial pH whereas for higher pH the average removal degree was close to 65%.
    Źródło:
    Environment Protection Engineering; 2013, 39, 2; 135-144
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of sorption characteristics of anaerobically digested dewatered municipal sewage sludge
    Autorzy:
    Varank, G.
    Demir, A.
    Bilgili, M. S.
    Top, S.
    Sekman, E.
    Yazici, S.
    Erkan, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/206920.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    municipal sewage sludge
    sorption
    chlorophenol
    sewage sludge
    adsorption isotherms
    wastewater treatment
    ścieki komunalne
    sorpcja
    chlorofenol
    osady ściekowe
    izotermy adsorpcji
    oczyszczanie ścieków
    Opis:
    Physical, chemical, morphological properties and sorption characteristics of anaerobically digested dewatered municipal sewage sludge have been investigated including the surface area, pore size distribution, chemical composition, surface chemistry structure, surface physical morphology, mineralogy, cation exchange capacity, heavy metal content, total solid, total volatile solid, total Kjeldahl-N, total phosphorus content of the sewage sludge. The sorption potential of sewage sludge for the removal of 4-CP and 2,4-DCP from aqueous solutions was examined by investigating their adsorption isotherms and kinetics in a lab-scale batch study. Findings of this study clearly showed that sewage sludge provides chlorophenol removal in the landfill body as disposed with solid wastes.
    Źródło:
    Environment Protection Engineering; 2014, 40, 4; 119-133
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of compost properties in sorption of heavy metals
    Autorzy:
    Martinho, J.
    Campos, B.
    Brás, I.
    Silva, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/207347.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chemicals removal
    water treatment
    composting
    copper
    heavy metals
    municipal solid waste
    sewage
    poultry manure
    sorption
    usuwanie chemikaliów
    uzdatnianie wody
    kompostowanie
    miedź
    metale ciężkie
    stałe odpady komunalne
    ścieki
    odchody drobiu
    sorpcja
    Opis:
    The feasibility of various composts to operate as sorbents for heavy metals (Cu and Zn) removal from wastewater has been evaluated. Three commercial composts obtained from municipal solid wastes (MWS), sludge sewage (SS) and poultry manure (PM) were selected as potential sorbents. Kinetic and equilibrium tests were conducted in order to assess the equilibrium conditions to remove metals from aqueous samples. For all composts, the maximum time necessary to reach the equilibrium was 240 min. The Freundlich and Langmuir isotherm models were found to fit the sorption data. The SS compost proved to be the one with highest removal capability for both assessed metals, while MWS compost showed to be the less suitable for this purpose. These results can be explained in terms of the compost surface properties, namely, with the cation exchange capacity.
    Źródło:
    Environment Protection Engineering; 2015, 41, 2; 57-65
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of hexavalent chromium from aqueous solution by adsorption on γ-alumina nanoparticles
    Autorzy:
    Golestanifar, H.
    Haibati, B.
    Amini, H.
    Dehghani, M. H.
    Asadi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/207945.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    adsorption
    alumina
    aluminum
    chemicals removal
    water treatment
    chromium
    chromium compounds
    nanoparticles
    sorption
    alumina nanoparticles
    hexavalent chromium
    adsorpcja
    aluminium
    usuwanie chemikaliów
    uzdatnianie wody
    chrom
    związki chromu
    nanocząstki
    sorpcja
    nanocząstki tlenku glinu
    chrom sześciowartościowy
    Opis:
    The use of γ-alumina (γ-Al2O3) nanoparticles as adsorbent to remove Cr(VI) from aqueous solution was investigated using batch experiments. Adsorption experiments were carried out for various initial doses of Al2O3, initial concentrations of chromium(VI), contact times and pH. The structure and morphology of the sorbent was characterized by XRD, SEM, and TEM techniques. Results demonstrated that the removal efficiency of chromium(VI) was increased by increasing the contact time, initial concentration, and pH. The results of the study showed that adsorption of chromium by γ-alumina nanoparticles reached equilibrium after 60 min and after that a little change of chromium removal efficiency was observed. Furthermore, kinetics of chromium sorption was well fitted by pseudo-second order kinetic model, and well explained by the Freundlich isotherm (R2 > 0.992). Overall, alumina nanoparticles recognized as an effective sorbent to remove chromium(VI) from aqueous solutions.
    Źródło:
    Environment Protection Engineering; 2015, 41, 2; 133-145
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of effectiveness of advanced treatment of municipal wastewater by sorption and nanofiltration. Separate processes and integrated systems
    Autorzy:
    Bohdziewicz, J.
    Kamińska, G.
    Pawlyta, M.
    Łukowiec, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/208002.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    effluent treatment
    carbon
    effluents
    nanofiltration
    pollution
    sorption
    wastewater treatment
    water filtration
    inorganic pollutants
    municipal effluents
    municipal wastewaters
    nitrogen
    phosphorus
    oczyszczanie ścieków
    węgiel
    ścieki
    nanofiltracja
    zanieczyszczenia
    sorpcja
    filtracja wody
    zanieczyszczenia nieorganiczne
    ścieki komunalne
    azot
    fosfor
    Opis:
    The feasibility of effluent treatment in separate processes and in integrated systems has been compared. In the sorption process, carbon nanotubes were used in a pressure installation, enabling execution of the process of sorption with nanofiltration in a cross-flow system. Evaluation of treatment effects based on the measurement of typical pollution parameters (COD, TOC, phenolic index, forms of nitrogen and phosphorus) and concentration of bisphenol A. The results show poor feasibility of sorption as a process for advanced treatment of municipal effluent. Effluent polishing in integrated sorption-nanofiltration systems, however, guaranteed high removal rates of organic and inorganic pollutants.
    Źródło:
    Environment Protection Engineering; 2015, 41, 2; 119-132
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of Cr(III) ions from water and wastewater by sorption onto peats and clays occurring in an overburden of lignite beds in central Poland
    Autorzy:
    Kyzioł-Komosińska, J.
    Rosik-Dulewska, Cz.
    Dzieniszewska, A.
    Pająk, M.
    Krzyżewska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/208228.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chromium compounds
    chlorine compounds
    hydrogen bonds
    iron compounds
    isotherms
    lignite
    peat
    sorption
    metal-organic complexes
    water
    wastewater
    związki chromu
    związki chloru
    wiązania wodorowe
    związki żelaza
    izotermy
    węgiel brunatny
    torf
    sorpcja
    kompleksy metaloorganiczne
    woda
    ścieki
    Opis:
    Sorption capacities of low-moor peats and Neogene clays from the overburden of lignite beds in Central Poland for Cr(III) ions as chloride and metalorganic complex ions have been investigated. The binding mechanisms and sorption parameters were determined based on the Freundlich and Langmuir nonlinear sorption isotherms. The sorption capacities of studied materials for Cr(III) ions depended on their properties (porosity, average pore diameters, specific surface area and content of Fe hydroxyoxides) as well as charge of Cr(III) ions, functional groups and their diagonal lengths. Cr(III) ions from chlorides were bound onto sorbents via Coulomb attraction and by Fe hydroxy-oxides. However the complex Cr(III) ions were bound to the sorbent surface via hydrogen bonds between the dye -OH groups and =O of the sorbent functional groups. The equation parameters of sorption isotherms indicate cooperative heterogeneous adsorption at low Cr(III) concentrations and chemisorption at high Cr(III) concentrations
    Źródło:
    Environment Protection Engineering; 2014, 40, 1; 5-22
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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