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Wyszukujesz frazę "ultrasound irradiation" wg kryterium: Temat

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Kinetics of degradation of perchloroethylene under ultrasonic irradiation and photooxidation in aqueous solution
    Autorzy:
    Kargar, M.
    Nabizadeh, R.
    Naddafi, K.
    Nasseri, S.
    Mesdaghinia, A.
    Mahvi, A. H.
    Alimohammadi, M.
    Nazmara, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/206938.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    związki organiczne
    chromatografia gazowa
    napromieniowanie
    fotooksydacja
    chlorowane węglowodory alifatyczne
    kinetyka degradacji
    czterochlorek etylenu
    czterochloroetylen
    per
    tetrachloroeten
    perchloroetylen
    sonoliza
    napromieniowanie ultradźwiękowe
    organic compounds
    gas chromatography
    irradiation
    photooxidation
    chlorinated aliphatic hydrocarbons
    kinetics of degradation
    perchloroethylene
    tetrachloroethylene
    PCE
    sonolysis
    ultrasound irradiation
    Opis:
    Sonolysis and photodegradation of various compounds such as chlorinated aliphatic hydrocarbons are the recent advanced oxidation processes. Perchloroethylene PCE is one of these compounds mainly used as a solvent and degreaser. In this work, elimination of perchloroethylene in aqueous solution by ultrasonic irradiation and photooxidation by UVC were investigated. Head space gas chromatography with FID detector was used for analyses of PCE. Results showed that PCE could be effectively and rapidly degraded by ultrasonic irradiation, photooxidation by UVC and combination of these methods. The order of studied reactions for degradation PCE has been determined.
    Źródło:
    Environment Protection Engineering; 2013, 39, 4; 29-38
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sonondegradation of organophosphorus pesticides in water
    Autorzy:
    Dehghani, M. H.
    Fadaei, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/208018.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    pesticides
    gas chromatography
    human organism
    sonolysis
    ultrasound irradiation
    diazinon
    malathion
    pestycydy
    chromatografia gazowa
    organizm ludzki
    sonoliza
    diazynon
    malation
    promieniowanie ultradźwiękowe
    Opis:
    Organophosphorus pesticides (OPPs), such as diazinon and malathion, are widely found in water resources. When absorbed by human organisms, OPP s are very toxic mainly because they deactivate acetyl cholinesterase. In the present study, the degradation of diazinon and malathion was investigated. The experiments were conducted for diazinon concentrations of 100, 300, 500 μg/dm3 and malathion concentrations of 200,400,600 μg/ dm3. Sonochemical examination was done using an ultrasonic reactor at 130 kHz and 500 NW for five times, and then the amount of the pesticide in a sample was measured by the gas chromatography with a flame ionization detector (GC-FID).The highest degradation of malathion and diazinon by the sonolysis process occurred at pH 9 and 3, respectively. The study demonstrates that malathion and diazinon could be effectively degraded by ultrasonic irradiation.
    Źródło:
    Environment Protection Engineering; 2013, 39, 4; 5-14
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, Characterization and Anti-diabetic activity of 1,3,5-triaryl-2-pyrazolines in acetic acid solution under Ultrasound Irradiation
    Autorzy:
    Emayavaramban, M.
    Santhi, N.
    Gopi, C.
    Manivannan, C.
    Raguraman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412176.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chalcone
    Pyrazoline
    ultrasound irradiation
    Anti-diabtic activity and Alloxan Monohydrate
    Opis:
    A chalcone was prepared by the reaction of 4-methylbenzaldehyde with 4-methylacetophenone in dilute methanolic sodium hydroxide solution under ultrasonic irradiationin the water bath of an ultrasonic cleaner at room temperature. Treatment of this chalcone with thiosemicarbazide / semicarbazide hydrochloride / benzhydrazide / benzenesulphonyl hydrazide / phenylhydrazine hydrochloride afforded the corresponding 2-pyrazoline in good yields. All the new compounds have been characterized by IR, 1H-NMR, 13CNMR spectral data. All the target compounds were evaluated for their in-vivo anti - diabetic activity in rates in comparison with as reference drug.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 2; 172-185
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acid-Promoted Synthesis of Imidazolyl-Pyrazole Derivatives via a Multicomponent Reaction Using Ultra Sound Irradiation
    Autorzy:
    Baria, B.
    Viradiya, D.
    Kotadiya, V.
    Kakadiya, R.
    Shah, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412490.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Imidazole
    ultrasound irradiation
    Imidazolyl-Pyrazole
    Benzil
    Opis:
    Some new imidazolyl pyrazole derivatives have been synthesized using benzil, ammonium acetate, and heterocyclic aldehyde in ethanol and acetic acid under ultra sound irradiation. The obtained products using this approach are having high purity and good in yield. By conducting the reactions in ethanol, the solid products were precipitated out and could be isolated simply by filtration. The synthesized compounds were characterized by various analytical techniques such as 1H and 13C NMR and further supported by mass spectroscopy.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 3; 277-283
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of Hexabenzylhexaazaisowurtzitane (HBIW) under Ultrasound Irradiation with Fe3O4@PCA Nanoparticles as an Efficient and Reusable Nanomagnetic Catalyst
    Autorzy:
    Malekzadeh, A. M.
    Shokrollahi, S.
    Ramazani, A.
    Rezaei, S. J. T.
    Asiabi, P. A.
    Joo, S. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/358107.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    hexabenzylhexaazaisowurtzitane (HBIW)
    nanomagnetic catalyst
    solid acid
    Fe3O4@PCA
    ultrasound irradiation
    Opis:
    Magnetic Fe3O4@polycitric acid (Fe3O4@PCA) nanoparticles were prepared by the reaction of Fe3O4 nanoparticles with an excess amount of citric acid at 100-160 °C. The magnetic Fe3O4@PCA nanoparticles were characterized by infrared spectroscopy (FTIR), scanning electron microscope (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA) and powder X-ray diffraction (XRD). Finally, the synthesized magnetic Fe3O4@PCA nanoparticles were used as a heterogeneous solid acid catalyst for the synthesis of HBIW from benzylamine and glyoxal in acetonitrile-water solvent under ultrasonic irradiation conditions. The catalyst could be reused up to 6 times without significant loss of activity.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 2; 336-350
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment of the pistachio processing wastewater using Fenton’s, ultrasound with Fenton’s, and coagulation processes
    Autorzy:
    Demir, O.
    Rastgeldi, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/207507.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Fenton process
    ultrasound irradiation
    wastewater treatment
    pistachio processing
    proces Fentona
    napromieniowanie ultradźwiękowe
    oczyszczanie ścieków
    przetwarzanie pistacji
    Opis:
    Pistachio processing wastewater was characterized and the treatability of wastewater using Fenton’s process, the combination of Fenton’s process with ultrasonic irradiation and coagulation processes was investigated. [Fe2+] = 27.6 mg/dm3, [H2O,sub>2]= 30 mg/dm3 and 75 min of reaction time were determined as the optimum conditions for Fenton’s process. Then, the combined treatment (ultrasound with Fenton’s process, was applied to the pistachio processing wastewater and 45% of COD removal efficiency was obtained. For the coagulation process, the optimum removal efficiencies of 60% and 45% were achieved for FeCl3 dosage of 2000 mg/dm3 and Al2(SO4)3 dosage of 3000 mg/dm3, respectively. The results demonstrate that higher COD removal efficiencies could be obtained from the combined ultrasound and Fenton’s process with respect to Fenton’s process alone. Besides, applying the coagulation process using FeCl3and Al2(SO4)3 also presents high COD removal efficiencies.
    Źródło:
    Environment Protection Engineering; 2018, 44, 1; 167-180
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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