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1

Adsorption of Methyl Orange Dye by Modified Fly Ash-Based Geopolymer – Characterization, Performance, Kinetics and Isotherm Studies

Purbasari Aprilina, Ariyanti Dessy, Fitriani Evi

Journal of Ecological Engineering

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2023

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Vol. 24, nr 3

90--98

EN

Geopolymer has been widely used as adsorbent for heavy metals and dyes. Modification on geopolymer surface with cationic surfactant can improve the anion exchange capacity of geopolymer. In this paper, fly ash-based geopolymer had been modified with cetyltrimethylammonium bromide (CTAB) which is cationic surfactant and applied as adsorbent of methyl orange (MO) anionic dye. Modified geopolymer had shown better performance as MO dye adsorbent compared to unmodified geopolymer. The adsorption of MO dye showed the best result at low pH and reached equilibrium after 90 minutes. On the basis of kinetics and isotherm studies, MO dye adsorption by modified geopolymer followed pseudo-second-order model and Langmuir model with maximum adsorption capacity of 19.231 mg∙g-1.

2

High Efficient Photocatalytic Degradation of Methyl Orange Dye in an Aqueous Solution by CoFe2O4-SiO2-TiO2 Magnetic Catalyst

Hariani Poedji Loekitowati, Said Muhammad, Salni, Aprianti Nabila, Naibaho Yohanna Asina Lasma Rohana

Journal of Ecological Engineering

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2022

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Vol. 23, nr 1

118--128

EN

This study successfully synthesized a core-shell-shell in the form of CoFe2O4-SiO2-TiO2 catalyst magnetic and recyclable. The catalyst was employed for the photocatalytic degradation of methyl orange (MO) dye. Subsequently, the catalyst was subjected to XRD, FTIR, SEM-EDS, VSM, as well as UV-DRS characterizations. The photocatalytic degradation was studied as a function of the solution pH, MO concentration, and irradiation time, while the kinetics of photocatalytic degradation and the catalyst reusability were also evaluated. On the basis of the XRD, FTIR, and SEM-EDS characterizations, the CoFe2O4 coating was successfully carried out using SiO2 and TiO2. CoFe2O4-SiO2-TiO2 was discovered to possess magnetic properties with a saturation magnetization of 17.59 emu/g and a bandgap value of 2.4 eV. The photocatalytic degradation of MO followed the Langmuir-Hishelwood model. The optimum degradation was obtained at the MO concentration of 25 mg/L, solution pH of 4, catalyst dose of 0.05 g/L, irradiation time of 160 minutes, MO removal efficiency achieved 93.46%. The regeneration study showed CoFe2O4-SiO2-TiO2 after 5 cycles were able to catalyze the photocatalytic degradation with an MO removal efficiency of 89.96%.

3

Azo dye wastewater treatment in a novel three-dimensional electrode reactor

Zou Haiming, Sun Zhili, Jiao Zhengtong, Wang Yang

Environment Protection Engineering

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2022

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Vol. 48, nr 2

5--13

EN

A novel three-dimensional electrode reactor (3DER) was designed to treat the dye wastewater. The performance of 3DER was evaluated via methyl orange (MO) removal efficiency. For comparison, the performance of the two-dimensional electrode reactor (2DER) was also assessed. Furthermore, the effects of electrolyte and aeration on treatment performance were preliminarily evaluated to further optimize the operation on 3DER. A repeatable and stable MO treatment efficiency was obtained in the 3DER. The MO removal rate reached 79.5% at the applied voltage of 1.0 V, electrode spacing of 2 cm and initial MO concentration of 60 mg/dm3, significantly higher than that in the 2DER (58.8%), suggesting the obvious improvement of particle electrodes on MO removal. Both adding electrolyte and air sparging into the 3DER contributed to the enhancement of the MO removal rate. These results obtained here suggest that the 3DER may provide an effective alternative for the treatment of azo dye wastewater and/or non-biodegradable industrial wastewaters.

4

The Efficiency of Mg-Al/Biochar for Methyl Orange and Methyl Red Removal

Badri Arini Fousty, Juleanti Novie, Mohadi Risfidian, Mardiyanto, Lesbani Aldes

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 1

202--211

EN

MgAl-LDH was directly impregnated with biochar to fabricate MgAl-Biochar (MgAl/BC) and applied to remove methyl orange (MO) and methyl red (MR). The XRD, BET, FTIR, TG-DTA and SEM analyses were conducted to characterize the prepared material. The result of XRD characterization diffraction peaks at 11.47, 22.86, 34.69, and 61.6 shows that the precursor was successfully transformed to MgAl-BC. The FT-IR analysis at vibration 1010, 1381,3447 and 1635 cm-1 illustrated that the composite was well formed. The BET analysis showed that the Surface area of the MgAl-BC composite was 111.404 m2/g which was larger than that of the precursor, equal to 23.15 m2/g. The kinetic model of the adsorption study both MR and MO were fitted to PSO and followed the Langmuir model with adsorption capacities for MR 142.857 mg/g and MO 128.205 mg/g. The regeneration study of composite indicated higher efficiency than the pristine and show good stability of adsorption process in five cycles.

5

Evaluation of integrated UFCW-MFC reactor for azo dye wastewater treatment and simultaneous bioelectricity generation

Zou Haiming, Chu Lin, Wang Yan

Environment Protection Engineering

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2020

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Vol. 46, nr 1

63--72

EN

An up-flow constructed wetland (UFCW) incorporating a novel membrane-less air-cathode single-chamber microbial fuel cell (MFC) was designed to treat dye wastewater and simultaneously generate bioelectricity. The performance of UFCW-MFC was evaluated via Methyl Orange (MO) and chemical oxygen demand (COD) removal rates and the output voltage. For comparison, the performance of a single UFCW was also assessed. A repeatable and stable voltage output of about 0.44±0.2 V was obtained in UFCW-MFC. The MO and COD removal rates in UFCW-MFC were 93.5 and 57.2%, respectively, significantly higher than those in single UFCW (75.4 and 42.6%, respectively), suggesting the obvious enhancement of electrodes on MO and COD removal. The anode zone of UFCW-MFC made the most contribution to MO and COD removal compared with other layers. The oxidation-reduction potential (ORP) and dissolved oxygen (DO) profiles showed that the anaerobic environment was well developed in the lower part of UFCW-MFC (0–24 cm) and the upper part (41–42 cm) had a good aerobic environment, thus greatly contributing to the MO anaerobic reduction and aerobic degradation of breakdown products. These results obtained here suggest that the UFCW-MFC may provide an effective alternative for the treatment of dye wastewater and simultaneous bioelectricity generation.

6

Badania adsorpcji wybranych barwników z roztworów wodnych na nanoporowatych materiałach węglowych w warunkach dynamicznych

Czubaszek M., Choma J.

Ochrona Środowiska

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2018

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Vol. 40, nr 3

3--8

PL

Badano adsorpcję dynamiczną trzech barwników: oranżu metylowego (OM), oranżu II (OII) i błękitu metylenowego (BM) z roztworów wodnych na czterech materiałach węglowych. Były to: zredukowany tlenek grafenu (rGO) otrzymany metodą chemiczną, mikroporowaty węgiel otrzymany z prekursora polimerowego – sulfonowanej żywicy styrenowo-diwinylobenzenowej (AC-SDVB), mezoporowaty, uporządkowany materiał węglowy otrzymany metodą miękkiego odwzorowania z żywicy fenolowo-formaldehydowej (OMC-PF) oraz handlowy węgiel aktywny (AC-F400). W dynamicznych badaniach kolumnowych wyznaczono krzywe przebicia tych adsorbentów, a do opisu krzywych przebicia złoża węgla wykorzystano równania Thomasa oraz Yoona-Nelsona. Uzyskane wartości adsorpcji dynamicznej barwników były duże, szczególnie w przypadku mikroporowatego węgla AC-SDVB oraz zredukowanego tlenku grafenu. Stwierdzono, że największą adsorpcją dynamiczną charakteryzował się zredukowany tlenek grafenu, który adsorbował oranż II w ilości 706 mg/g. Wykorzystane równania Thomasa i Yoona-Nelsona dobrze opisywały krzywe przebicia złoża węgla (R2=0,97÷0,99).

EN

Dynamic adsorption of three dyes was studied: methyl orange (OM), orange II (OII) and methylene blue (MB) from aqueous solutions on four carbon materials. These were: reduced graphene oxide (rGO) obtained by the chemical method, microporous carbon prepared from a polymeric precursor – sulfonated styrene-divinyl benzene resin (AC-SDVB), ordered mesoporous carbon material obtained by soft templating from phenol-formaldehyde resin (OMC-PF) and the commercial activated carbon (AC-F400). Breakthrough curves for the above adsorbents were determined in dynamic column experiments and Thomas and Yoon-Nelson equations were used to describe them. Dynamic dye adsorption values were high, especially for AC-SDVB microporous activated carbon and reduced graphene oxide. The highest dynamic adsorption was demonstrated for the reduced graphene oxide, rGO, which adsorbed 706 mg/g of orange II. The equations of Thomas and Yoon-Nelson well described the breakthrough curves for the carbon bed with correlation coefficients R2 = 0,97÷0,99.

7

Adsorpcja wybranych barwników z roztworów wodnych na nanoporowatych materiałach węglowych otrzymanych z prekursorów polimerowych

Czubaszek M., Choma J.

Ochrona Środowiska

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2017

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Vol. 39, nr 2

3--10

EN

Adsorption of orange II, methyl orange and methylene blue from aqueous solutions on three carbon materials was studied. The first material for studies was the microporous activated carbon obtained from sulfonated styrene- divinylbenzene resin (AC-SDVB), the second – ordered mesoporous carbon obtained from phenol-formaldehyde resin (OMC-PF) and the third – commercial micro-mesoporous activated carbon from Chemviron Carbon (AC-F400). Adsorption isotherms of the above-mentioned dyes on the carbon materials were studied under laboratory conditions at 25 C. The experimental data was described using the well-known Langmuir, Freundlich and Langmuir-Freundlich adsorption isotherm equations. On the basis of the correlation coefficient (R2) value, it was demonstrated that the Langmuir equation best described this data. The maximum adsorbed amounts for the three dyes were determined. The highest value was obtained for AC-SDVB: 625 mg/g for orange II and about 500 mg/g for methyl orange and methylene blue. These values were approximately five times higher than the maximum adsorption values for individual dyes on OMC-PF and AC-F400 (maximum adsorption values were about 100 mg/g). The difference in the effectiveness of dye adsorption on the carbon materials tested was the result of a much more developed porous structure of carbon AC-SDVB, compared to other two carbons. The specific surface area of AC-SDVB was 2 480 m2/g, 660 m2/g – for OMC-PF and 1 260 m2/g – for AC-F400. In addition, the values of standard characteristic numbers for activated carbons, methylene number and iodine number, were also evaluated. The highest value of both the methylene number, equal to 30 cm3, and the iodine number of 1 900 mg/g were obtained for AC-SDVB. In conclusion, some of the porous carbon materials obtained from polymers, characterized by excellent structural parameters, are particularly efficient in adsorption of dyes from aqueous solutions.

PL

Badano adsorpcję trzech wybranych barwników organicznych (oranż II, oranż metylowy i błękit metylenowy) z roztworów wodnych na trzech materiałach węglowych. Pierwszym był mikroporowaty węgiel aktywny otrzymany z żywicy styrenowo-dwuwinylobenzenowej (AC-SDVB), drugim – uporządkowany węgiel mezoporowaty otrzymany z żywicy fenolowo-formaldehydowej (OMC-PF), a trzecim – handlowy mikro-mezoporowaty węgiel aktywnym firmy Chemviron Carbon (AC-F400). W warunkach laboratoryjnych wyznaczono doświadczalne izotermy adsorpcji tych barwników na węglach aktywnych w temperaturze 25C. Otrzymane dane doświadczalne opisano za pomocą znanych równań izoterm adsorpcji – Langmuira, Freundlicha oraz Langmuira-Freundlicha. Na podstawie wartości współczynnika korelacji (R2) stwierdzono, że najlepiej dane doświadczalne opisywało równanie izotermy Langmuira. Na podstawie otrzymanych izoterm adsorpcji wyznaczono maksymalne wartości adsorpcji poszczególnych barwników na badanych materiałach węglowych. Największą wartość adsorpcji uzyskano na węglu AC-SDVB – 625 mg/g (w przypadku oranżu II) oraz około 500 mg/g (w przypadku oranżu metylowego i błękitu metylenowego). Wartości te były około pięciokrotnie większe od maksymalnych adsorpcji poszczególnych barwników na węglach OMC-PF i AC-F400 (węgle te charakteryzowały sie maksymalną wartością adsorpcji każdego barwnika wynoszącą około 100 mg/g). Różnica w skuteczności adsorpcji barwników na badanych węglach była efektem znacznie lepiej rozwiniętej struktury porowatej węgla AC-SDVB, w porównaniu z pozostałymi węglami. Powierzchnia właściwa węgla AC-SDVB wynosiła 2480 m2/g, węgla OMC-PF – 660 m2/g, a węgla AC-F400 – 1260 m2/g. Ponadto wyznaczono wartości standardowych liczb charakteryzujących węgle aktywne – liczbę metylenową i liczbę jodową. Największą wartość zarówno liczby metylenowej (30 cm3), jak i liczby jodowej (1900 mg/g) otrzymano w przypadku węgla AC-SDVB. Badania wykazały, że niektóre porowate materiały węglowe otrzymane z polimerów, charakteryzujące się bardzo dobrymi parametrami struktury porowatej, wyjątkowo dobrze nadają się do adsorpcji barwników z roztworów wodnych.

8

Determination of the Dexlansoprazole in Bulk and Spiked Human Plasma by Extraction Spectrophotometry

Sekharan C. B., Rao M. P., Mahesh M., Chandramouli I., Seemanth J.

International Letters of Chemistry, Physics and Astronomy

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2015

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Vol. 52

28--38

EN

This paper describes a simple extraction spectrophotometric method for the quantification of dexlansoprazole in bulk and spiked human plasma. This method involves formation of stable yellow colored chloroform extractable ion-pair complex of the amino derivative of dexlansoprazole with acid dye, namely methyl orange in acidic medium. The ion-pair complexes exhibit absorption maxima at 425 nm. Dexlansoprazole can be determined up to 4-40 μg/mL by the proposed method. The effect of optimum reagent concentration was studied. The relative standard deviations (≤1. 246%) obtained in the intra-day and inter-day analyses were found to be satisfactory. The accuracy results exhibited the mean recovery and percentage error in the range of 99.137%–100.574% and 0.012%–0.863%. When applied for the assay of the dexlansoprazole in spiked human plasma sample, recovery mean values ranged from 96.495–98.960%. The proposed method is useful for the estimation of the dexlansoprazole in bulk and human plasma samples.

9

Effect of dye content in a treated solution on performance of the UF ceramic membrane

Kawiecka-Skowron J., Majewska-Nowak K.

Environment Protection Engineering

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2011

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Vol. 37, nr 2

5-12

EN

Low-pressure membrane processes have been studied in order to treat aqueous solutions of dyes. The influence of dye concentration (10, 20, 100 g/m3) on separation efficiencies of organic dyes (Methyl Orange, Titan Yellow and Direct Black) was analyzed. CeRAM INSIDE®(Tami Industries) membranes with various cut-off values (1, 15 kDa) were examined. The ultrafiltration process was carried out at the transmembrane pressures of: 0.03, 0.06, and 0.09 MPa. It was found that the process efficacy was affected not only by the kind of dye, but also by the dye concentration, applied pressure and membrane cut-off. With increasing dye content in the treated solution the rejection coefficient improved.

10

Preparation of activated carbons with enhanced adsorption of cationic and anionic dyes from Chinese Hickory husk using the Taguchi method

Cao Y., Pawłowski A., Zhang J.

Environment Protection Engineering

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2010

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Vol. 36, nr 3

69-86

EN

Waste Chinese Hickory husk biomass was used as a precursor in the preparation of low-cost activated carbon by ZnCl2 activation. The activated carbon was to be used for the removal of both cationic and anionic dyes - methylene blue (MB) and methyl orange (MO). The preparation parameters, including impregnation ratio (the mass ratio of ZnCl2 to the precursor), the activation temperature, the activation time and the impregnation time, were evaluated. The Taguchi method, in combination with analysis of variance (ANOVA), was used to determine the effects of the preparation parameters on the dye adsorptive capacities of the activated carbon, and to optimize preparation conditions with the goal of maximizing its adsorptive capacities. The optimized conditions were an impregnation ratio of 2.0 g/g, an activation temperature of 550 oC and an activation time of 60 min. In such an optimal combination of parameters, the adsorption of MB and MO was expected to reach approximately 400 mg/g and 900 mg/g, respectively. The activation temperature had the most significant effect on the carbon capacity to adsorb MB and MO. The impregnation ratio had a significant effect on the adsorption of both dyes with the trend towards higher adsorption at higher impregnation ratio, while the activation time and the impregnation time were found to be insignificant.

11

Wpływ polielektrolitu na skuteczność ultrafiltracji roztworów wodnych zawierających barwniki organiczne i substancję powierzchniowo czynną

Majewska-Nowak K.

Ochrona Środowiska

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2006

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R. 28, nr 4

3-10

PL

Oceniono wydajność i skuteczność procesu ultrafiltracji wodnych roztworów barwników organicznych z dodatkiem substancji powierzchniowo czynnej i kationowego polielektrolitu. W badaniach wykorzystano płaskie membrany ultrafiltracyjne wykonane z regenerowanej celulozy i polietersulfonu. Membrany charakteryzowały się różnymi wartościami granicznej rozdzielczości (5 kDa, 10 kDa i 30 kDa). Proces ultrafiltracji przeprowadzono w przy ciśnieniach 0,1 MPa i 0,2 MPa w stosunku do roztworów anionowych barwników organicznych (oranżu metylowego, czerwieni indygo, czerni amidowej i czerni bezpośredniej) oraz roztworów barwników z dodatkiem surfaktantu - dodecylosiarczanu sodu (SDS) i kationowego polielektrolitu Magnofloc LT 22S. Stężenie barwników i SDS w roztworach wodnych wynosiło 100 g/m3, zaś polielektrolitu - 0,5 g/m3. Stwierdzono, że obecność kationowego polielektrolitu, jako substancji kompleksującej, przyczyniła się do polepszenia właściwości separacyjnych membran ultrafiltracyjnych (zwłaszcza polietersulfonowych) w stosunku do anionowych barwników organicznych i anionowej substancji powierzchniowo czynnej (SDS). Obecność kationowego polielektrolitu zarówno w roztworach zawierających anionowe barwniki organiczne jak i w roztworach barwników z anionową substancją powierzchniowo czynną spowodowała zmniejszenie wydajności membran ultrafiltracyjnych, zwłaszcza o umiarkowanej hydrofilowości. Przyczyną tego zjawiska było blokowanie struktury membran przez makrocząsteczkowe kompleksy typu polielektrolit-barwnik (SDS). Zjawisko to było tym bardziej widoczne, im większa była graniczna rozdzielczość membran.

EN

The effect of a cationic polyelectrolyte on the efficiency of dye and surfactant solution treatment by ultrafiltration was assessed. Flat UF membranes made of regenerated cellulose and polyethersulfone characterized by different cut-off values (5, 10, and 30 kDa) were used in the experiments. The UF process involved a pressure of 0.1 and 0.2 MPa. Permeation measurements were carried out with aqueous solutions of different anionic dyes (Methyl Orange, Indigo Carmine, Amido Black, and Direct Black) and dye solutions containing an anionic surfactant, sodium dodecyl sulphate (SDS), and/or a cationic polyelectrolyte, Magnofloc LT 22S. Dye and surfactant concentration in the experimental solutions amounted to 100 g/m3, whereas polyelectrolyte concentration was equal to 0.5 g/m3. It was found that when a cationic polyelectrolyte was present in the dye solutions or in the aqueous mixtures of an anionic dye and an anionic surfactant, this was concomitant with a decrease in membrane permeability and an increase in dye and surfactant retention (especially for polyethersulfone membranes). The observed effects can be attributed to the formation of intermolecular complexes of polycations with dye and surfactant particles. These polyelectrolyte complexes can cause membrane fouling, which is more pronounced for membranes of higher cut-off values and moderate hydrophilicity.

12

Usuwanie barwników organicznych z roztworów wodnych w procesie ultrafiltracji w obecności anionowej substancji powierzchniowo czynnej

Majewska-Nowak K.

Ochrona Środowiska

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2006

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R. 28, nr 3

15-24

PL

Określono wydajność i skuteczność procesu ultrafiltracji wodnych roztworów barwników organicznych z dodatkiem substancji powierzchniowo czynnej. W badaniach wykorzystano płaskie membrany ultrafiltracyjne wykonane z różnych polimerów (octan celulozy, regenerowana celuloza, polisulfon, polietersulfon i poliamid), charakteryzujące się różnymi wartościami granicznej rozdzielczości (cut-off), tj. 1 kDa, 5 kDa, 10 kDa i 30 kDa. Proces ultrafiltracji przeprowadzono w zakresie ciśnień od 0,05 MPa do 0,2 MPa w stosunku do roztworów anionowych barwników organicznych (oranż metylowy, czerwień indygo, czerń amidowa, żółcień tytanowa i czerń bezpośrednia) oraz roztworów barwników z dodatkiem surfaktantu (dodecylosiarczan sodu - SDS). Stężenie barwników i SDS w roztworach wodnych wynosiło 100 g/m3. Stwierdzono, że w wypadku membran o umiarkowanym stopniu hydrofilowości obecność SDS w roztworze przyczyniła się do obniżenia przepuszczalności membran i polepszenia efektu separacji barwników, natomiast w wypadku membran wybitnie hydrofilowych stwierdzono zjawisko odwrotne - dodanie anionowego związku powierzchniowo czynnego do roztworu anionowego barwnika spowodowało poprawę właściwości transportowych i niewielkie obniżenie skuteczności zatrzymywania barwników.

EN

The effect of an anionic surfactant on the efficiency of dye solution treatment by ultrafiltration was assessed. Flat UF membranes made of various polymers (cellulose acetate, regenerated cellulose, polysulfone, polyethersulfone, and polyamide) and characterized by different cut-off values (1, 5, 10, and 30 kDa) were used in the experiments. The UF process involved a pressure of 0.05, 0.1, 0.15, and 0.2 MPa. Permeation measurements were carried out with aqueous solutions of different anionic dyes (methyl orange, indigo carmine, amido black, titan yellow, and direct black) and dye solutions containing an anionic surfactant - sodium dodecyl sulfate (SDS). Dye and surfactant concentration in the experimental solutions amounted to 100 g/m3. It was found that when a surfactant was present in the dye solutions, this was concomitant with a decrease in membrane permeability and an increase in dye retention for membranes of moderate hydrophilicity. In the case of high-hydrophilic membranes, an opposite phenomenon was observed - the dosage of an anionic surface active agent into dye solutions brought about an improvement in transport properties and a slight deterioration in dye retention.