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Tytuł:
Dye removal using keggin polyoxometalates assisted ultrafi ltration: characterization and UV visible study
Autorzy:
Kahloul, Malak
Chekir, Jalila
Hafiane, Amor
Powiązania:
https://bibliotekanauki.pl/articles/205295.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultrafiltration
dye removal
complexation
polyoxometalates
permeate flux
Opis:
To improve dye retention, there is a concurrent interest in the development and optimization of an alternative and promising method for the dye recovery in aqueous solutions. In this regard, considerable attention was paid to the polyoxometalates (POMs) assisted ultrafiltration (POMAUF). The aim of the present study is to eliminate toluidine blue (TB) dye by ultrafiltration membrane using keggin polyoxometalates (POMs) as complexing agents. In the first step, the keggin polyoxometalates K3[PW12O40]∙6H2O (PW12) and K7 [PW11O39]∙14H2O (PW11) were prepared. Then, the obtained powders were characterized by X-ray diffraction and infrared spectroscopies. Afterwards, the removal of toluidine blue (TB) using polyoxometalates assisted ultrafiltration (POMAUF) was studied. Factors affecting the retention of dye and permeate flux such as transmembrane pressure, operating time, polyoxometalates concentration, ionic strength, surfactant and pH were investigated. All results of both compounds have been presented and discussed. The results reveal that the addition of POMs leads to an increase in dye retention from 11 to 95% for the PW12 and to 98% for the PW11. The results of this work have thus suggested the promising enhancement of ultrafiltration membrane selectivity for the dye removal using new complexing agents such as POMs in place of polyelectrolytes and surfactants.
Źródło:
Archives of Environmental Protection; 2019, 45, 4; 30-39
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of acid, direct and reactive dyes on thepolyacrylic anion exchanger
Autorzy:
Polska-Adach, Ewelina
Wawrzkiewicz, Monika
Hubicki, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/110859.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dye removal
polyacrylic anion exchanger
reactive dye
direct dye
acidic dye
Opis:
In the present studythe polyacrylic anion exchanger Amberlite IRA 478 (IRA 478) was used forremoval of textile dyes such as C.I. Acid Red 18 (AR18), C.I. Reactive Blue 21 (RB21) and C.I. Direct Yellow 142 (DY142) from aqueous solutions. Sorption of the above-mentioned dyes was carried out by the static and dynamic methods. The obtained results were analyzed by determining the adsorption isothermparameters using the Langmuir and Freundlichmodels. Kinetic parameters of dyessorption were calculated from the pseudo-first order, pseudo-second order and intraparticle diffusion models. The monolayer sorption capacities of IRA 478 determined from the Langmuir isotherm were found to be 1098.5 mg/g for AR18 (R2=0.994), 46.8 mg/g for DY142 (R2=0.820) and 23.5 mg/g for RB21 (R2=0.987).Kinetic studies revealed that effectiveness of AR18, DY142 and RB21 uptakeincreases with increasing phase contact time and initial dyesconcentration.The kinetics of the dyessorption process on the anion exchanger is best described by the pseudo-second order model (PSO) due to the high values of the determination coefficients R2 (linearity condition of the plot t/qt vs.t). The rate constantsof the pseudo-second order kinetics k2are reduced from 0.1001 to 0.0008 g/mg·min for AR18, from 0.0147 to 0.0112 g/mg·min for DY142 and 0.0489 to 0.0072 g/mg·min for RB21 with an increase of initial concentration of dyes.The presence of salts and surfactants had an impact on the retention of direct and reactive dyes.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1496-1508
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of reactive dyes from aqueous solutions using ultrafiltration membranes
Autorzy:
Ahmed, Arif Eftekhar
Majewska-Nowak, Katarzyna
Grzegorzek, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/2032851.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
reactive dye
ultrafiltration membrane
water solution
dye removal
barwnik reaktywny
membrana ultrafiltracyjna
roztwór wodny
usuwanie barwnika
Opis:
The removal of five reactive dyes varying in molecular weight (Reactive Orange 16, Remazol Brilliant Blue R, Reactive Orange 20, Reactive Black 5, Reactive Red 120) was evaluated by using flat ultrafiltration membranes made of polyethersulfone (PES) and regenerated cellulose (C) characterized by various cut-off values (5, 10, and 30 kDa). The ultrafiltration process was performed in a dead-end mode under the transmembrane pressure range of 0.05–0.2 MPa. Dye concentration in model solutions was equal to 100 mg/dm3. The separation efficiency of all tested dyes was strongly dependent on the membrane type and the membrane cut-off, as well as on the applied pressure. Unexpectedly, the molecular weight of the tested reactive dyes had a minor impact on the dye removal effectiveness. The ultrafiltration membranes made of polyethersulfone and regenerated cellulose can be used in reactive dye removal on the condition that the membrane cut-off is not higher than 10 kDa. The PES and C membranes enable the separation of reactive dyes by 80–97%, and 45–89%, respectively.
Źródło:
Environment Protection Engineering; 2021, 47, 3; 109-120
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isotherm studies of malachite green removal by yarn processing sludge-based activated carbon
Badanie izoterm usuwania zieleni malachitowej przez osad ściekowy modyfikowany węglem aktywnym
Autorzy:
Tang, Shu Hui
Zaini, Muhammad Abbas Ahmad
Powiązania:
https://bibliotekanauki.pl/articles/106340.pdf
Data publikacji:
2019
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
adsorbent
adsorption
chemical activation
dye removal
sludge
adsorpcja
aktywacja chemiczna
usuwanie barwników
szlam
Opis:
Adsorption is an effective wastewater treatment technique which has been widely used in various industrial applications. However, the high operation cost involving commercial activated carbon in industrial processes is the main drawback. Sewage sludge is an auspicious precursor of activated carbon owing to its high carbon content, rich functional groups, low cost, high availability and abundance. This research was aimed to establish the feasibility of converting yarn processing sludge into activated carbon by KI + KOH activation and char at 700 °C for 1 h. The effect of preparation strategies on the properties of sludge-based adsorbents (SBA) was reviewed. The applications of SBAs in the removal of dyes and model pollutants were discussed. The results from this study proved that the preparation of yarn processing sludge-based activated carbon via KI + KOH activation is feasible and effective in the adsorption of dye. This paper provides further insight on the preparation methods of sludge-based adsorbents and dye wastewater treatment using these adsorbents.
Źródło:
Chemistry-Didactics-Ecology-Metrology; 2019, 24, 1-2; 127-134
2084-4506
Pojawia się w:
Chemistry-Didactics-Ecology-Metrology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania przydatności membran ceramicznych do usuwania barwników organicznych z roztworów wodnych
Applicability of ceramic membranes to the removal of organic dyes from aqueous solutions
Autorzy:
Majewska-Nowak, K.
Kawiecka-Skowron, J.
Powiązania:
https://bibliotekanauki.pl/articles/236550.pdf
Data publikacji:
2009
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
ultrafiltracja
membrana ceramiczna
ścieki farbiarskie
barwnik organiczny
ultrafiltration
ceramic membrane
textile wastewater
dye removal
Opis:
Określono skuteczność usuwania anionowych barwników organicznych z modelowych roztworów wodnych w procesie ultrafiltracji z użyciem membran ceramicznych. Do oceny właściwości transportowych i separacyjnych membran ceramicznych wykorzystano strumień objętości permeatu oraz skuteczność usuwania barwnika z roztworu. W badaniach wykorzystano trzy jednokanałowe membrany ceramiczne CéRAM INSIDEŽ (Tami Industries), różniące się graniczną rozdzielczością (1 kDa, 15 kDA o 50 kDa). Badaniom poddano roztwory dziewięciu anionowych barwników organicznych o masie cząsteczkowej od 327 Da do 1060 Da. Badania przeprowadzono z wykorzystaniem laboratoryjnej instalacji ultrafiltracyjnej ProFlux M12 (Millipore) przy ciśnieniach transmembranowych 0,03 MPa, 0,06 MPa i 0,09 MPa. Analizowano wpływ masy cząsteczkowej barwnika oraz stosowanego ciśnienia na skuteczność procesu. Badania wykazały przydatność membran ceramicznych do usuwania barwników organicznych z roztworów wodnych. Stwierdzono, że membrana o granicznej rozdzielczości 15 kDa odznaczała się najlepszymi właściwościami separacyjnymi, podczas gdy membrana 50 kDa wykazywała znakomitą przepuszczalność. Wszystkie przebadane membrany ceramiczne pozwoliły na zatrzymanie barwników o dużej masie cząsteczkowej (>700 Da) w 95÷99%, niezależnie od wartości ciśnienia transmembranowego. Wykazano, że ekonomicznie uzasadnione jest stosowanie membran ceramicznych o granicznej rozdzielczości 50 kDa, gdyż membrany te zapewniają dużą wydajność przy dobrej skuteczności usuwania barwników o większych masach cząsteczkowych.
Laboratory tests were conducted to determine the efficiency of anionic organic dye removal from aqueous solutions by ultrafiltration when use is made of ceramic membranes. The transport and separation properties of the membranes were evaluated by analyzing the volume flux of the permeate, and the efficiency of dye removal from the solution. The tests were performed with three single-channel CéRAM INSIDEŽ (Tami Industries) membrane modules differing in cut-off values (1 kDa, 15 kDa, and 50 kDa), with nine anionic organic dyes of molecular weights ranging from 327 to 1060 Da, and with a laboratory UF installation of ProFlux M12 (Millipore) type, at a transmembrane pressure of 0.03 MPa, 0.06 MPa and 0.09 MPa. The efficiency of the process was analyzed both in terms of the molecular weights of particular dyes and in terms of the pressure applied. The applicability of the ceramic membranes to the removal of organic dyes from aqueous solutions has been substantiated. The tests have produced the following findings. The ceramic membrane with the cut-off value of 15 kDa exhibited the best separation properties, whereas that with the cut-off value of 50 kDa was characterized by excellent permeability. All of the ceramic membranes under study provided 95-99% retention of high-molecular-weight organic dyes (>700 Da) irrespective of the transmembrane pressure applied. In economic terms, it is advisable to use 50 kDa cut-off ceramic membranes as they enable high removal efficiencies to be achieved for dyes of higher molecular weights.
Źródło:
Ochrona Środowiska; 2009, 31, 2; 55-60
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Spontaneous Oxidation Processes of Zero-valent Iron and Electrocoagulation for Reactive Black 5 Removal
Zastosowanie procesów samorzutnego utleniania żelaza na zerowym stopniu utlenienia (ZVI) oraz elektrokoagulacji (EC) w usuwaniu Reactive Black 5
Autorzy:
Wysocka, I.
Filipkowska, U.
Jóźwiak, T.
Powiązania:
https://bibliotekanauki.pl/articles/233177.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
dye removal
zero-valent iron
electrocoagulation
reactive dyes
usuwanie barwników
utlenianie żelaza
elektrokoagulacja
barwniki reaktywne
Opis:
Two methods of Reactive Black 5 dye removal were compared in this work, namely electrocoagulation (EC) and one based on spontaneous electrochemical oxidation of zero-valent iron (ZVI). Both methods are based on electrode processes and the sorption process and allow to achieve a similar effectiveness of dye removal. In the case of ZVI, however, a longer contact time or a greater surface area of the electrodes applied is necessary. In turn, the ZVI enables to conduct the processes of dye removal with no requirement for an external source of electric current (lower exploitation inputs). The study demonstrated that the application of both the ZVI method and EC is especially advisable in the case of lower initial concentrations of dye in the solution, i.e. the higher the concentration, the lower the contribution of electrode processes in dye removal from the solution and the greater the contribution of sorption processes.
W ramach niniejszej pracy porównano dwie metody usuwania barwnika Reactive Black 5. Metodę elektrokoagulacji (EC), oraz metodę opartą na samorzutnym elektrochemicznym utlenianiu żelaza na 0 stopniu utlenienia (ZVI). Obie metody wykorzystują procesy elektrodowe oraz procesy sorpcji, umożliwiając uzyskanie podobnej efektywność usuwania barwnika. W przypadku ZVI wymagany jest jednak dłuższy czas kontaktu, lub większa powierzchnia zastosowanych elektrod. ZVI umożliwia jednak przeprowadzenie procesów usuwania barwy, bez konieczności stosowania zewnętrznego źródła prądu (mniejsze nakłady eksploatacyjne). Badania wykazały, że zastosowanie zarówno metody ZVI i EC ma szczególne uzasadnienie w przypadku niższych stężeń początkowych barwnika w roztworze. Im wyższe stężenie, tym udział procesów elektrodowych w usuwaniu barwy roztworu jest mniejszy a przewagę zyskują procesy sorpcji.
Źródło:
Fibres & Textiles in Eastern Europe; 2017, 4 (124); 121-128
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of culture conditions for improved green biodecolorization of methylene blue by Rhodococcus pyridinivorans strain UCC 0003
Autorzy:
Maniyam, M.N.
Hari, M.
Powiązania:
https://bibliotekanauki.pl/articles/2096404.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
agricultural waste
dye removal
kinetic study
methylene blue
repeated decolorization
Rhodococcus pyridinivorans strain UCC 0003
Opis:
Methylene blue is a toxic dye present in the textile industry, and if left untreated, it causes harm to the environment. Therefore, to decolorize methylene blue from industrial effluents, a green approach using Rhodococcus pyridinivorans strain UCC 0003 was attempted. Methylene blue decolorization was measured spectrophotometrically, and the static condition yielded 86% decolorization after 24 h as compared to the shaking mode (20%). Optimization of static conditions using the one-factor-at-a-time approach resulted in 100% decolorization at 30EC, pH 6, inoculum size of 16% (v/v), and 5% (v/v) banana peel addition as a carbon source. The R. pyridinivorans strain UCC 0003 could successfully and completely decolorize 0.75 g/l methylene blue for 4 consecutive cycles, which is advantageous from an economic point of view. The rate of methylene blue disappearance was investigated using 10% (v/v) R. pyridinivorans strain UCC 0003 at 30EC over a certain incubation time with 0.4 g/l to 10.0 g/l methylene blue as the substrate. This study revealed Vmax and Km values of 37.04 g/l/h and 55.69 g/l, respectively, as the kinetic behavior of methylene blue-decolorizing enzymes from the bacterial strain. The properties of the treated solution of methylene blue resembled the control system (distilled water) for the phytotoxicity study, thereby indicating the complete removal of dye toxicity as evidenced by the growth of Vigna radiata and Triticum aestivum, respectively, in the treated methylene blue solution. This local bacterial strain has therefore a huge potential to be used as a green biocatalyst for the bioremediation of methylene blue-containing industrial effluents.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 2; 125-140
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad usuwaniem barwnych związków organicznych ze ścieków z przemysłu włókienniczegoBadania nad usuwaniem barwnych związków organicznych ze ścieków z przemysłu włókienniczego
Research on removal of coloured organic compounds from textile industry wastewater
Autorzy:
Dąbek, L.
Ozimina, E.
Picheta-Oleś, A.
Powiązania:
https://bibliotekanauki.pl/articles/1819068.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
usuwanie barwnych związków
przemysł włókienniczy
modified activated carbons
hydrogen peroxide
dye removal
adsorption
efficiency
reagent
ozone
Opis:
The manuscript presents the results of the research regarding the efficiency of removal of coloured organic compounds from textile industry wastewaters with the use of Fenton reaction and simultaneous process of sorption and oxidation in the presence of activated carbon and hydrogen peroxide (or magnesium peroxide) as well as in the presence or absence of UV radiation. The most efficient method – guaranteeing the oxidation of organic compounds and decolourization of the solution indicated by the 80% reduction in COD (as compared to the initial value) within the period of 1 h – was the use of Fenton reaction. The application of combined processes of sorption and oxidation with the use of activated carbon and hydroxen peroxide in order to remove the organic pollutants from the examined wastewaters resulted in 64% reduction in COD, but only after 24 hours. Replacing hydrogen peroxide with magnesium peroxide accelerated the process of sorption and / or oxidation of organic pollutants leading to 50% reduction in COD after 2 hours of reaction. At the same time, initiating the decomposition of H2O2 with the formation of OH* radicals in the activated carbon/hydrogen peroxide system resulted in an effective decomposition of organic compounds, which is indicated by 60% reduction in COD after 2 hours. This solution appears to be the most promising, since after the separation of activated carbon (which can be further re-used) a colourless, transparent solution of pH of 6,5 – 7,5 is obtained, which can be disposed into the municipal sewage system.
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1164-1176
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemically modified excessive sludge as an adsorbent of dyes
Chemicznie modyfikowany osad nadmierny jako sorbent barwników
Autorzy:
Pieczykolan, Barbara
Płonka, Izabela
Zając, Robert
Powiązania:
https://bibliotekanauki.pl/articles/126816.pdf
Data publikacji:
2020
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
excessive sludge
waste sorbent
sorption process
dye removal
sorption isotherm
osad nadmierny
sorbenty odpadowe
proces sorpcji
usuwanie barwników
izoterma adsorpcji
Opis:
In the municipal wastewater treatment technology, the biological method based on the activated sludge process is most commonly used. The activated sludge consists of small flocs, which mainly include bacteria. During the purification process, the growth of microorganisms and their multiplication occurs. Whereby it is necessary to discharge the excess sludge outside the technological system to maintain the concentration of the activated sludge in bioreactor at the appropriate level. Currently, the excess sludge is subjected to the stabilization process (usually biologically) and then it is directed to e.g. agricultural use as fertilizer. In recent years, research is conducted on the use of excessive sludge in the sorption process as a waste sorbent. During the studies, experiments on the use of a chemically modified excess sludge (as an sorbent) to remove two dyes from aqueous solutions (Acid Red 18 and Acid Green 16) were conducted. Excessive activated sludge was thickened, dried at 105 °C and ground to a grain size < 0.49 mm. The sludge was then chemically treated using Fenton's reagent. Next, the adsorption process was carried out. The effect of pH, the effect of reaction time and sorption isotherm was determined. Parameters of three models of isotherms were calculated: Freundlich, Langmuir and Dubinin-Radushkevich.
W technologii oczyszczania ścieków komunalnych najczęściej stosowana jest metoda biologiczna wykorzystująca osad czynny. Osad czynny składa się z małych kłaczków, które głównie zawierają bakterie. Podczas procesu oczyszczania ma miejsce wzrost mikroorganizmów i ich namnażanie. W związku z tym konieczne jest odprowadzenie nadmiaru osadu poza układ technologiczny w celu utrzymania na odpowiednim poziomie stężenia osadu czynnego w bioreaktorze. Obecnie osad nadmierny poddawany jest procesowi stabilizacji (zwykle biologicznej), a następnie kierowany np. do wykorzystania rolniczego jako nawóz. W ostatnich latach prowadzone są badania nad możliwością wykorzystania osadu nadmiernego jako sorbentu odpadowego w procesie sorpcji. Podczas badań przeprowadzono eksperymenty z użyciem chemicznie modyfikowanego osadu nadmiernego (jako sorbentu) do usuwania dwóch barwników z roztworów wodnych (Acid Red 18 oraz Acid Green 16). Nadmierny osad czynny zagęszczono, wysuszono w 105 °C i zmielono do wielkości ziarna < 0,49 mm. Następnie osad poddano obróbce chemicznej z użyciem odczynnika Fentona, po czym przeprowadzono proces adsorpcji. Określono wpływ pH, czas reakcji i wyznaczono izotermę sorpcji. Ponadto obliczono parametry trzech modeli izoterm: Freundlicha, Langmuira i Dubinina-Radushkevicha.
Źródło:
Proceedings of ECOpole; 2020, 14, 1; 29-37
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-cost removal of basic red 9 using cow dung ash
Autorzy:
Arya, Raj Kumar
Meena, Ghanshyam
Thapliyal, Devyani
Barman, Sanghamitra
Halder, Gopinath
Shandilya, Pooja
Powiązania:
https://bibliotekanauki.pl/articles/2173437.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption isotherms
adsorption kinetics
dye removal
low-cost adsorbent
cow dung
ash
izotermy adsorpcji
kinetyka adsorpcji
usuwanie barwnika
tani adsorbent
krowie łajno
popiół
Opis:
In the present study, basic red 9 had been removed from synthetic waste water using animal waste. Cow dung ash had been prepared and characterized by scanning electron microscope. Morphology analysis shows very fine particles of less than 1 μm. The pH analysis study favours a pH of 8.5 for maximum dye removal. The removal of basic red 9 was very fast on cow dung ash. Percentage dye removal was 80.24% and 95.24 in 5 minutes and 90 minutes, respectively at initial dye concentration of 10 ppm.
Źródło:
Chemical and Process Engineering; 2022, 43, 2; 229--242
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrospun niobium oxide 1D nanostructures and their applications in textile industry wastewater treatment
Autorzy:
Zaborowska, Marta
Smok, Weronika
Tański, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2204528.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrospinning
niobium oxide
photocatalysis
MB removal
RhB removal
textile wastewater treatment
methylene blue removal
rhodamine B dye removal
elektroprzędzenie
tlenek niobu
fotokataliza
usuwanie MB
usuwanie RhB
oczyszczanie ścieków włókienniczych
uswuanie rodaminy B
uswuanie błękitu metylenowego
Opis:
Textile industry emits daily huge amounts of sewage rich in non-biodegradable organic compounds, especially in textile dyes. Such contaminants are highly soluble in water, which makes their removal difficult. Other studies suggest their carcinogenicity, toxicity and mutagenicity. A promising chemical treatment of textile wastewater is the photodegradation of dye molecules in the process of photocatalysis in the presence of a photocatalyst. One-dimensional nanostructures exhibit a high surface-to-volume ratio and a quantum confinement effect, making them ideal candidates for nanophotocatalyst material. Nb2O5 is, among other metal oxides with a wide band gap, gaining popularity in optical applications, and electrospun niobium oxide nanostructures, despite their ease and low cost, can increase the chemical removal of textile dyes from wastewater. Facile synthesis of electrospun one-dimensional niobium oxide nanofibers is presented. The nanophotocatalysts morphology, structure, chemical bonds and optical properties were examined. Based on photodegradation of aqueous solutions (ph=6) of methylene blue and rhodamine B, the photocatalytic activity was established. The photocatalytic efficiency after 180 minutes of ultraviolet irradiation in the presence of Nb2O5 nanofibers was as follows: 84.9% and 31.8% for methylene blue and rhodamine B decolorization, respectively.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144941
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Azo dye wastewater treatment in a novel process of biofilm coupled with electrolysis
Autorzy:
Zou, Haiming
Chu, Lin
Wang, Yang
Powiązania:
https://bibliotekanauki.pl/articles/204706.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
azo dye wastewater treatment
color removal
biofilm
electrolysis
bioelectrochemical system
Opis:
Azo dye wastewater treatment is urgent necessary nowadays. Electrochemical technologies commonly enable more efficient degradation of recalcitrant organic contaminants than biological methods, but those rely greatly on the energy consumption. A novel process of biofilm coupled with electrolysis, i.e., bioelectrochemical system (BES), for methyl orange (MO) dye wastewater treatment was proposed and optimization of main influence factors was performed in this study. The results showed that BES had a positive effect on enhancement of color removal of MO wastewater and 81.9% of color removal efficiency was achieved at the optimum process parameters: applied voltage of 2.0 V, initial MO concentration of 20 mg/L, glucose loads of 0.5 g/L and pH of 8.0 when the hydraulic retention time (HRT) was maintained at 3 d, displaying an excellent color removal performance. Importantly, a wide range of effective pH, ranging from 6 to 9, was found, thus greatly favoring the practical application of BES described here. The absence of a peak at 463 nm showed that the azo bond of MO was almost completely cleaved after degradation in BES. From these results, the proposed method of biodegradation combined with electrochemical technique can be an effective technology for dye wastewater treatment and may hopefully be also applied for treatment of other recalcitrant compounds in water and wastewater
Źródło:
Archives of Environmental Protection; 2019, 45, 3; 38-43
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodegradation of Turquoise Blue Textile Dye by Wood Degrading Local Fungi Isolated from a Plantation Area
Autorzy:
Sudiana, I Ketut
Citrawathi, Desak Made
Sastrawidana, I Dewa Ketut
Maryam, Siti
Sukarta, I Nyoman
Wirawan, Gede Agus Hendra
Powiązania:
https://bibliotekanauki.pl/articles/2173257.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
ligninolityc enzyme
removal efficiency
turquoise blue dye
wood degrading fungi
Opis:
This research aimed to investigate the potential screening of wood degrading fungi to degrade the textile dye. Nine fungi were selected based on their ability to remove the turquoise blue textile dye on liquid potatoes dextrose médium. The fungi which have a high color removal efficiency were identified and analyzed qualitatively in terms of the manganese peroxidase and lignin peroxidase enzymes and their enzyme activity was determined. The selected fungi were investigated for their ability to degrade turquoise blue under variations in pH, dye concentration, and contact time. The results showed that three of the nine strains of wood-degrading local fungi, identified as Trametes hirsuta, Microporus xanthopus, and Ganoderma applanatum, were able to degrade textile dye. The color removal efficiency of dye treatment was monitored under the initial pH, dye concentration, and contact time variation. The study analyzed that the optimal color removal efficiency of the turquoise blue textile dye with a concentration of 30 mg/L in an aqueous solution was achieved at 78.50 and 85.84% at pH 6 for Microporus xanthopus and Ganoderma applanatum, while the color removal efficiency was 82.17% at pH 5 for Trametes hirsuta with seven days of incubation time.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 205--214
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alumina-silica-titania adsorbent for hazardous azo and phtalocyanine dyes removal from textile baths and wastewaters – the impact of ionic surfactants
Autorzy:
Wiśniewska, Małgorzata
Wrzesińska, Katarzyna
Wawrzkiewicz, Monika
Chibowski, Stanisław
Urban, Teresa
Goncharuk, Olena
Gun’ko, Vladimir M.
Powiązania:
https://bibliotekanauki.pl/articles/1450276.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dyes sorption removal
mixed oxide
ionic surfactants
dye-surfactant complexes
electrokinetic parameters
Opis:
Two aspects of interfacial phenomena were discussed in the manuscript. The first one concerns the adsorptive removal of two azo dyes such as C.I. Acid Yellow 219 (AY219) and C.I. Direct Yellow 142 (DY142) as well as the phtalocyanine C.I. Reactive Blue 21 (RB21) on the alumina silicatitania oxide (4% wt. $Al_2O_3$ – 8% wt. $SiO_2$ – 88% wt. $TiO_2$; AST88) in the ionic surfactants presence. The second one deals with the determination of interaction mechanism in the dyes-AST88, dyes-surfactant-AST88 systems using the data obtained from the surface charge density and zeta potential studies. The sodium dodecyl sulphate (SDS) with anionic character and hexadecyltrimethylammonium bromide (CTAB) with cationic ones were used. The adsorption capacities of 205.2 mg/g for AY219, 36.5 mg/g for RB21 and 18 mg/g for DY142. The potentiometric titration and Doppler laser electrophoresis methods enable determination of sign and magnitude of charge located in both the surface and the slipping plane layers around the solid particles. The structure of electrical double layer was determined in the AST88 systems without as well as with dyes and with mixed dye + surfactant adsorbates.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 178-193
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of reactive Orange 4 on sesame stalks. Modeling, kinetics and equilibrium
Autorzy:
Tanyildizi, M. S.
Demirci, Y.
Powiązania:
https://bibliotekanauki.pl/articles/207499.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
aqueous solutions
basic dye
removal
optimization
degradation
biomass
design
barwnik reaktywny
hydroliza
łodyga sezamu
biomasa
degradacja
optymalizacja
Opis:
Placket Burman design (PBD) and central composite design (CCD) were employed to study the adsorption of Reactive Orange 4 (RO4) on sesame stalk. In the study conducted with the PBD, a total of seven parameters (initial dye concentration, initial pH of solution, temperature, amount of adsorbent, particle size, contact time, and shaking speed) were studied, and four of these were found to influence the adsorption of dye. A mathematical model equation was developed by using the CCD. Analysis of variance (ANOVA) indicated a high coefficient of determination (R2= 0.93). The initial dye concentration, amount of sesame stalk, contact time, and initial pH were shown to be very significant (p < 0.05) for RO4 adsorption. The data for the adsorption of RO4 at equilibrium on sesame stalk were analyzed by the Langmuir, Freundlich, and Tempkin models. Temperature increase from 20 to 60 degrees C enhanced the adsorption capacity of the monolayer from 84.75 to 178.57 mg/g. The rate constants were calculated for various initial concentrations of the dye by using pseudo-first and pseudo-second order kinetic and particle diffusion adsorption models. The kinetic evaluations showed that the experimental data were in accordance with the pseudo-second order model.
Źródło:
Environment Protection Engineering; 2017, 43, 3; 5-20
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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