Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Cu" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-10 z 10
    Tytuł:
    Spectrophotometric determination of copper as copper Piperazine
    Autorzy:
    Kavitha, Ch.
    Babu, M. S.
    Saraswathi, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/412355.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    spectophotometry
    Cu(II)
    piperazine
    Opis:
    Spectrophotometric method for determination of Cu(II) in the trace quantities was developed by using piperazine as ligand in ammonium acetate medium. The Procedure developed was applied for the estimation Cu(II) in microgram quantities in the samples of alloys and the method was found to be simple, rapid and comparable to routine analytical methods for trace level analysis of metal ions in environmental samples in any laboratory where sophisticated and expensive instruments are not available. UV visible spectrophotometer is cost effective and available in almost all laboratories. The complexes of piperazine in aqueous solutions are not reported so far and this is the first attempt in this area of spectrophotometric analysis.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 8, 3; 205-209
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lignocellulosic fraction of the pericarps of the acorns of Quercus suber and Quercus ilex: isolation, characterization, and biosorption studies in the removal of copper from aqueous solutions
    Autorzy:
    Mébarki, Moubarek
    Hachem, Kadda
    Harche, Meriem Kaid
    Powiązania:
    https://bibliotekanauki.pl/articles/779763.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    adsorption
    Cu(II)
    lignocellulosic fraction
    pericarp
    Quercus sp.
    Opis:
    Pericarps of Algerian Quercus ilex (Q. ilex) and Quercus suber (Q. suber) were used as copper adsorbents in artifi cially contaminated solutions. Exposing accessible lignocellulosic binding sites enhanced adsorption. The lignocellulosic fractions of Q. suber and Q. ilex (36.47±9.1 and 47.66±9.3, respectively) were characterized by FTIR before and after adsorption. The aim was to identify the functional groups adsorbing Cu(II). SEM/EDX determined lignocellulose surface morphology and composition. The amount of adsorbent-bound Cu(II) increased with initial [Cu(II)]. Cu(II) adsorption range was 23.59–48.06 mg.g–1 for Q. Suber and 22.56–38.19 mg.g–1 for Q. ilex when [Cu(II)] was 100–500 mg.L–1. Adsorption isotherms and Langmuir and Freundlich models of the Q. suber and Q. ilex lignocellulosic fractions indicated natural Cu(II)adsorption capacities (Qmax) of 53.76 mg.g–1 and 36.06 mg.g–1 and KF of 5.9 mg.g–1 and 7.43 mg.g–1, respectively.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 3; 40-47
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous removal of phenol and Cu(II) from wastewater by tallow dihydroxyethyl betaine modified bentonite
    Autorzy:
    Hu, Xiangyang
    Wang, Bao
    Yan, Gengsheng
    Ge, Bizhou
    Powiązania:
    https://bibliotekanauki.pl/articles/2203123.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    simultaneous adsorption
    tallow dihydroxyethyl betaine
    bentonite
    Cu(II)
    phenol
    Opis:
    An organobentonite modified with an amphoteric surfactant, tallow dihydroxyethyl betaine (TDHEB), was used as an adsorbent to simultaneously remove Cu(II) and phenol from wastewater. The characteristic of the organobentonite (named TDHEB-bentonite) was analyzed by X-ray diffraction, Fourier-transform infrared spectra and nitrogen adsorption-desorption isotherm. Batch tests were conducted to evaluate the adsorption capacities of TDHEB-bentonite for the two contaminants. Experiment results demonstrated that the adsorption of both contaminants is highly pH-dependent under acidic conditions. TDHEB-bentonite had about 2.0 and 5.0 times higher adsorption capacity toward Cu(II) and phenol, respectively, relative to the corresponding raw Na-bentonite. Adsorption isotherm data showed that the adsorption processes of both contaminants were well described by Freundlich model. Kinetic experiment demonstrated that both contaminants adsorption processes correlated well with pseudo-second-order model. Cu(II) had a negative impact on phenol adsorption, but not vice versa. Cu(II) was removed mainly through chelating with the organic groups (-CH2CH2OH and -COO-) of TDHEB. Otherwise, partition into the organic phase derived from the adsorbed surfactant was the primarily mechanism for phenol removal. Overall, TDHEB-bentonite was a promising adsorbent for removing Cu(II) and phenol simultaneously from wastewater.
    Źródło:
    Archives of Environmental Protection; 2022, 48, 3; 37--47
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reactivity of nZVI in the removal of Cu(II) and Zn(II) from synthetic mine drainage
    Autorzy:
    Suponik, Tomasz
    Neculita, Carmen Mihaela
    Powiązania:
    https://bibliotekanauki.pl/articles/2032928.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mining industry
    nZVI
    zero-valent iron
    Cu(II)
    Zn(II)
    przemysł wydobywczy
    Opis:
    Adsorption properties, including isotherms and kinetics, of nano zero-valent iron (nZVI) for Cu(II) and Zn(II) removal from synthetic mine drainage were evaluated in batch tests. The influence of contact time, nZVI doses, pH, ionic strength, temperature, and concentration on nZVI adsorption properties was assessed. The removal of Cu(II) and Zn(II) increased with pH from 3 to 7 and then stabilized up to pH 10. Moreover, the increased Cu(II) adsorption capacity upon increasing temperature and a positive enthalpy change (ΔH) indicate that the adsorption process is endothermic. The results also showed that the adsorption equilibrium for Cu(II) and Zn(II) was achieved after 50 and 30 min, respectively. Kinetics were best described by a pseudo-nth order model, with the order of sorption of 2.231 and 1.363, and the rate constants of 0.0008 and 0.0679 mg1-n·gn-1/min, for Cu(II) and Zn(II), respectively. The correlation between the amount of metals adsorbed on nZVI surface and the residual amount of metals in water during isothermal tests was best described by the nonlinear Sips model. Using this model, high q maxS were found: 286.6 mg/g and 142.6 mg/g, for Cu(II) and Zn(II), respectively, as indication of their high sorption capacity.
    Źródło:
    Environment Protection Engineering; 2021, 47, 2; 93-108
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduction of NO with methane over metal ion-exchanged mordenite
    Autorzy:
    Ćwikła-Bundyra, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/346983.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    selective catalytic reduction of NO
    mordenite
    catalysts
    Co(II)
    Ni(II)
    Cu(II)
    Opis:
    This article presents the results of research studies on the possibilities of application of natural zeolite-mordenite for the reduction of nitrogen oxide. Various kinds of metal ions were added to the zeolite samples using the ion-exchange method. The effect of metal contents was shown for the mordenite and related to their catalytic properties. The catalytic properties of Cu-, Co-, Ni- were compared for NO reduction with methane. High nitric oxide conversions were observed for copper and cobalt-mordenite, especially in the temperature range between 400 and 500 C degree. Copper- and cobaltmordenite catalysts showed higher activities and selectivities than catalysts composed of nickel-exchanged mordenite.
    Źródło:
    Ars Separatoria Acta; 2011, 8; 109-119
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of Cu(II) and Pb(II) from aqueous solutions by lactic acid bacteria
    Usuwanie Cu(II) I Pb(II) z roztworów wodnych przez bakterie kwasu mlekowego
    Autorzy:
    Wierzba, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/127425.pdf
    Data publikacji:
    2015
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    biosorption
    Cu(II)
    Pb(II)
    isotherm
    lactic acid bacteria
    biosorpcja
    izoterma
    bakterie kwasu mlekowego
    Opis:
    The aim of the study was to compare the removal of Cu(II) and Pb(II) from aqueous solution by lactic acid bacteria (LAB). Effect of various process parameters, viz., initial metal ions concentration, pH, and contact time has been studied for the removal of copper and lead ions. Langmuir and Freundlich models were applied to describe the biosorption isotherm of the metal ions by LAB biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The sorbent showed the maximum sorptive capacity amounting to be 11.07 and 10.51 mg · g–1 for Cu(II) and Pb(II) ions, respectively. The optimum conditions were pH 6.0 with equilibrium time of 40 min for both metal ions. The involvement of functional groups on the surface of dried biomass in biosorption process is also discussed.
    Celem pracy było porównanie zdolności usuwania Cu(II) i Pb(II) z roztworu wodnego przez bakterie kwasu mlekowego (LAB). Badano wpływ różnych parametrów, tj. stężenia jonów metali, pH i czas kontaktu, na proces usuwania jonów miedzi i ołowiu. Do opisu izoterm adsorpcji jonów metali przez biomasę LAB zastosowano modele Langmuira i Freundlicha. Uzyskane dane doświadczalne były lepiej dopasowane do modelu Langmuira niż Freundlicha. Sorbent wykazał maksymalną zdolność sorpcyjną, wynoszącą 11,07 i 10.51 mg · g–1 odpowiednio dla jonów Cu(II) i Pb(II). Optymalne warunki biosorpcji obu jonów metali wynosiły: pH 6,0 i czas równowagi 40 minut. Omówiono również udział grup funkcyjnych na powierzchni biomasy w procesie biosorpcji.
    Źródło:
    Proceedings of ECOpole; 2015, 9, 2; 505-512
    1898-617X
    2084-4557
    Pojawia się w:
    Proceedings of ECOpole
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New application of D-π-A molecules as a sensor for recognition of Cu2+ in polluted water
    Autorzy:
    Niu, H.
    Zhu, G.
    Zhu, M.
    Li, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/207782.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    polluted water
    nuclear magnetic resonance spectroscopy
    Cu(II)
    woda zanieczyszczona
    spektroskopia magnetycznego rezonansu jądrowego
    Opis:
    Novel chromophore GZP1 with D-π-A structure was designed and prepared for its application as a sensor for the recognition of Cu2+ ions in polluted water. Reaction of aldimine condensation was used to synthesize chromophore GZP1. Its chemical structure of was characterized by mass spectrum, nuclear magnetic resonance spectroscopy and ultraviolet-visible absorption spectrum. Cu2+ ions were recognized via fluorescence spectra. Chromophore GZP1 showed specific detection ability of Cu2+. 14 other metal ions were used as reference. The detection limit was estimated to be 0.06 μmol/dm3 in aqueous solution, which was significantly lower than the typical concentration of blood Cu2+ in normal individuals and the limit of copper(II) in drinking water.
    Źródło:
    Environment Protection Engineering; 2017, 43, 4; 67-72
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of synthetic zeolite materials from fly ash to remove copper(II) ions from aqueous solutions
    Autorzy:
    Ulatowska, Justyna
    Stala, Łukasz
    Nowakowska, Alicja
    Polowczyk, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/1450167.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fly ash
    copper oxide (II)
    Cu(II)
    modification of fly ashes
    zeolite materials
    adsorption
    Opis:
    Water quality and waste management are two chief problems that the modern world is struggling with. Intensified development of the industry not only leads to the production of large amounts of solid waste that must be stored in landfills but can also result in contaminant emissions into the environment. Enormous quantities of ash produced from coal combustion have been a long-term problem of the industry. Literature studies show that fly ash can be used as a material to produce cheap and efficient zeolite-type adsorbents due to abundance of alumina-silicates in their composition. Fly ashes which were processed into zeolites as a result of alkaline hydrothermal treatment were obtained from two power plants in Poland (in Turów and Zgierz). The obtained zeolite materials and raw fly ash samples were characterised in terms of specific surface area, particle size distribution and density. The structure was also investigated using Fourier transform infrared spectroscopy (FTIR) in the mid- infrared wavenumber range. Two raw fly ashes and two zeolite materials were examined for their ability to remove Cu(II) ions from aqueous solutions. The results showed that the amount of adsorbed copper ions by alkaline-modified fly ash was higher than for unmodified fly ash. The ion removal efficiency is high and exceeds 95%.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 6; 114-124
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of modified maize hull for removal of Cu(II) ions from aqueous solutions
    Autorzy:
    Ghasemi, S. M.
    Mohseni-Bandpei, A.
    Ghaderpoori, M.
    Fakhri, Y.
    Keramati, H.
    Taghavi, M.
    Moradi, B.
    Karimyan, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/208248.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    heavy metal ions
    waste water
    Cu(II)
    ions
    adsorption
    biomass
    jony metali ciężkich
    ścieki
    biomasa
    adsorpcja
    Opis:
    Discharge of industrial waste containing heavy metals to the environment is a main concern because of their toxicity to many life forms. Adsorption process is one of the conventional methods in order to adsorb heavy metals from wastewater effluents. Therefore, the removal of Cu(II) from aquatic solutions using modified maize hull was investigated. All experiments were performed in batch conditions. The residual Cu(II) concentration was measured by AAS. Upon increasing the adsorbent dosage, pH, and contact time and decreasing Cu(II) concentration, the removal efficiency of Cu(II) ions increased. In optimum conditions, 50% of copper was removed by modified maize hull. The experimental data were best fitted by the Langmuir type 2 model and the adsorption kinetic model followed a pseudo-second order type 1 model. It seems that the use of the modified maize hull to remove Cu(II) ions is very suitable, low-cost, and efficient.
    Źródło:
    Environment Protection Engineering; 2017, 43, 4; 93-103
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie przebiegów równolegle zachodzących flotacji jonów cynku i miedzi
    Comparison of simultaneously running flotation of zinc and cooper ions
    Autorzy:
    Kawalec-Pietrenko, B.
    Konopacka-Łyskawa, D.
    Rybarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2071313.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    flotacja jonowa i precypitacyjna
    jony
    Zn(II)
    Cu(II)
    efektywność
    kolektor
    SDS
    CTAB
    precipitation and ion flotatio
    ions
    efficiency
    collector
    Opis:
    W pracy zbadano wpływ pil oraz stężenia kolektora na efektywność procesów flotacji jonowej i precypitacyjncj zastosowanych do równoległego usuwania jonów cynku Zn(II) i miedzi Cu(II) z rozcieńczonych, kwaśnych i alkalicznych roztworów wodnych. Najwyższe wartości stopnia wyfloto-wania dla obydwu metali odnotowano dla pll = 8,5 + 9,5 przy zastosowaniu SDS jako kolektora. Dla roztworów o pH> 11 zaobserwowano spadek stopnia wyflotowania ze wzrostem stężenia kolektora kationowego oraz wystąpienie czasu indukcji.
    An influence of pH and collector concentration on the precipitation and ion flotation efficiency used for removal of Zn(ll), Cu(II) ions from diluted, acidic and alkaline water solutions was tested. The highest values of flotation degree were noted for pH= 8.5 9.5 and for SDS used as a collector. For solutions of pH> 11, it was observed the decrease of flotation degree with the increase of cationic collector concentration and the presence of induction time.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2011, 5; 50-51
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies