Temat: water degradation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of WO3 on the morphology and photodegradation of dimethyl phthalate of TiO2 nanotube array photoelectrode
Autorzy:: Xin, Y.
Wang, G.
Liu, Y.
Zang, Z.
Gao, M.
Powiązania:: https://bibliotekanauki.pl/articles/206886.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: degradation
esters
morphology
scanning electron microscopy
tungsten
water treatment
degradacja
estry
morfologia
skaningowa mikroskopia elektronowa
wolfram
oczyszczalnia ścieków
Opis:: WO₃ modified TiO₂ nanotube array (WO₃/TNAs) photoelectrodes were fabricated via electrochemical deposition on TNAs/Ti photoelectrodes. The morphology and structure of WO₃/TNAs photoelectrodes were investigated by scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The effects of deposition potential, deposition duration, NaWO₄ concentration, and calcination temperature on the morphology and the photocatalytic activity were investigated. The results showed that suitable amounts of WO₃ promoted the photocatalytic activity of TNAs photoelectrodes for the degradation of dimethyl phthalate (DMP). The optimal conditions for the fabrication of WO₃/TNAs photoelectrodes were as follows: deposition voltage 3.0 V, 10 min deposition duration, 0.01 mol/dm³ Na₂WO₄ concentration, 1.5 cm electrode gap, and 550 °C annealing temperature. The degradation rate of DMP reached 77% after 60 min of illumination by WO₃/TNAs photoelectrode. Additionally, WO₃/TNA photoelectrodes possessed superb stability for maintaining a high DMP degradation efficiency at more than 75% after 10 times of successive use with 60 min irradiation for each cycle. The enhancement of photocatalytic performance by the efficient combination of WO₃ with TNAs would provide a theoretical basis for the practical application of WO₃/TNA photoelectrodes in water treatment.
Źródło:: Environment Protection Engineering; 2018, 44, 3; 129-139
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Impact of the water composition on the degradation kinetics of natural organic matter in photocatalytic membrane reactors
Autorzy:: Rajca, M
Powiązania:: https://bibliotekanauki.pl/articles/208135.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: water hardness
biological materials
bioreactors
degradation
deionized water
kinetics
membranes
rate constants
surface water
first order reactions
natural organic matters
photocatalytic process
twardość wody
materiały biologiczne
bioreaktory
degradacja
woda dejonizowana
kinetyka
membrany
stałe szybkości
wody powierzchniowe
reakcje pierwszego rzędu
naturalne substancje organiczne
proces fotokatalityczny
surface waters
Opis:: Decomposition kinetics of natural organic substances during the photocatalytic process with a semi-conductor TiO2 has been investigated. In the study, a laboratory reactor Heraeus and in a photocatalytic membrane reactor were used. Simulated solutions of deionized water, surface water and fulvic acids, differing in composition, were tested in the experiment. In order to determine reaction rate constants, the Langmuir–Hinshelwood kinetic model based on the first order reaction was applied. It was found that photocatalytic process enabled effective degradation of natural organic substances although its run was affected by inorganic ions, mainly those producing water hardness, present in water.
Źródło:: Environment Protection Engineering; 2015, 41, 1; 29-39
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Degradations of 2,4-dichlorophenol and polychlorinated biphenyls with zero valent iron under subcritical conditions. Importance of subcritical water oxidation
Autorzy:: Oh, S.-Y.
Yoon, M.-K.
Powiązania:: https://bibliotekanauki.pl/articles/207444.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: chemicals removal
water treatment
degradation
gas chromatography
iron
mass spectrometry
organic pollutants
polychlorinated biphenyls
2,4-dichlorophenol
DCP
polychlorinated biphenyl
PCBs
usuwanie chemikaliów
uzdatnianie wody
degradacja
chromatografia gazowa
żelazo
spektrometria masowa
zanieczyszczenia organiczne
polichlorowane bifenyle
PCB
2,4-dichlorofenol
Opis:: The abiotic transformations of 2,4-dichlorophenol (DCP) and polychlorinated biphenyls (PCBs) has been examined in the presence and of zero valent iron (Fe(0)) under subcritical conditions. It was found that the degradation of DCP was significantly enhanced, showing complete degradation of DCP in 3 h at 300 °C. Control experiments without Fe(0) indicated that the removal of DCP in the iron–water system was mostly due to subcritical water oxidation and that the enhancement of degradation in the presence of Fe(0) was less significant. Regardless of Fe(0), PCBs were rapidly decomposed, showing 93% destruction in 5 h at 300 °C. Product identification by gas chromatography-mass spectrometry (GC-MS) analysis showed that the reductive transformation of DCP and PCBs w Fe(0) existed under subcritical conditions. Our results suggest that subcritical water degradation may be a possible remediation option to treat DCP and PCBs in water and soil.
Źródło:: Environment Protection Engineering; 2015, 41, 3; 73-86
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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