Reactive Dyes

Zhang, Shufen; Tappe, Horst; Helmling, Walter; Mischke, Peter; Rebsamen, Karl; Reiher, Uwe; Russ, Werner; Schläfer, Ludwig; Vermehren, Petra

doi:10.1002/14356007.a22_651.pub2

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…The printing and dyeing industry has many kinds of products, complicated production process, and many dyestuff additives used, which will cause serious water pollution once discharged into the water, and the dyeing wastewater has high chromaticity, high organic pollutant content, and complex organic composition, which is difficult to degrade in the natural environment, so it is more difficult to treat. 19 At present, the commonly used treatment methods of dye wastewater mainly include physical adsorption 20,21 photocatalytic degradation, membrane separation 22,23 ion exchange 24,25 chemical deposition, microbial treatment, etc. Among them, physical adsorption has become a hot research topic in the field of water purification because of its low cost, high operability and low energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic electrospinning for fabrication of poly(lactic acid)/graphite oxide/poly(dopamine) nanofiber membrane

Zhu

Zhao

Qian

et al. 2023

Journal of Engineered Fibers and Fabrics

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As a new preparation process of nanofibers, electrospinning technology developed by bionic spider spinning can further improve the molecular structure and mechanical properties of nanofibers, and obtain nanofibers and base membrane products with better mechanical properties. The spider spinning needs minimal energy consumption though it has a very long liquid transport tube. Because spider silk has high mechanical properties and wide industrial applications, so a kind of new biomimetic electrospinning technology which harnessed a very long spiral-needle was proposed. Then poly(lactic acid)PLA/graphite oxide(GO)/dopamine (DA) nanofiber membrane was fabricated by the new biomimetic electrospinning technology. The results showed that compared with the pure PLA nanofiber membranes, the average pore size of PLA/GO porous nanofiber membranes decreased, the total number of pores increased, and the fracture strength and elongation at break increased. At the same time, the spun nanofibers were also more uniform. The pore size distribution of nanofiber was more dense after adding DA, and the fracture strength and elongation at break of nanofiber increased, while the nanofiber was also more even. After adding DA, the fracture strength was greatly increased and the elongation at break was similar to that of pure PLA nanofiber. The nanofiber membrane was obtained after oxidative polymerization of DA into poly(dopamine) (PDA), a layer of nanofiber membrane was attached to the surface of nanofiber. The performance of PLA/GO/PDA nanofiber membranes prepared based on PLA/GO/DA nanofiber membranes was superior to that of PLA/GO/PDA nanofiber membranes prepared based on PLA/GO nanofiber membranes, and its adsorption rate after 24 h was as high as 98.81%.

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Section: Introductionmentioning

confidence: 99%

Biomimetic electrospinning for fabrication of poly(lactic acid)/graphite oxide/poly(dopamine) nanofiber membrane

Zhu

Zhao

Qian

et al. 2023

Journal of Engineered Fibers and Fabrics

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“…Reactive dyes are a type of dye that is widely used in the textile industry because they contain reactive groups that allow textile fibers to be bonded to each other through the formation of covalent bonds. Thanks to this feature, which improves the interaction of dye with textile fibers, low energy consumption is possible (3,4). Many reactive dyes are available in the azo dye category.…”

Section: Introductionmentioning

confidence: 99%

Removal Of Sumifix Yellow EXF Reactive Azo Dye By Electro-Fenton Method

ÖZKUL,

KARABACAKOĞLU

2023

Journal of the Turkish Chemical Society Section A: Chemistry

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Reactive dyes can be found in large quantities in textile industry wastewater due to their widespread use for dyeing cotton fabrics and their durable nature. In the treatment of wastewater containing dyestuffs in this class, advanced treatment methods have become necessary due to the inadequacy of conventional treatment methods and their disadvantages. For this reason, electro-Fenton, an electrochemical advanced oxidation method, is a strong alternative as a treatment technology that provides complete disintegration of dye molecules. In this study, the electro-Fenton method was used to treat model wastewater containing the reactive azo dye Sumifix Yellow EXF. The electro-Fenton process is based on the in situ generation of hydroxyl radicals (⦁OH), a strong oxidant, using Fe2+ and H2O2 released at the electrodes or added from outside. In the electrochemical cell used, carbon fiber was used as the cathode and iron was used as the anode. While Fe2+ ion was produced at the anode, H2O2 was added to the cell externally. In the experiments carried out at room temperature, a 250 mL glass beaker was used as a reactor. In the study, the optimization of the parameters was achieved by using the classical experimental design method. According to this method, one parameter is changed and other parameters are kept constant. In order to achieve the highest dyestuff removal, experiments were conducted by varying the voltage (5–10 V), H2O2 concentration (9–74 mM), Na2SO4 concentration (6–25 mM), and pH (3-5), and the impact of these factors on dye removal and energy consumption was evaluated. It was found that for the best dye removal, voltage is 7.5 V, the H2O2 concentration is 74 mM, the Na2SO4 concentration is 25 mM and the optimum pH value is 4. At these values, 98.14% removal at 30 minutes was achieved with an energy consumption of 7.98 Wh/L. The electro-Fenton method was found to be a highly effective approach for wastewater treatment and environmental remediation, showing remarkable dye removal efficiency with reasonable energy consumption under optimized conditions.

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“…However, the reported researches about the azo-anthraquinone dyes mainly focused on acid and disperse dyes, but rarely on reactive dyes. In contrast, reactive dyes are extensively used in the textile industry since they can be linked onto the fibers through covalent bonds, and the dyed fibers have high fastness to wet treatment [13,14,15,16,17,18]. In addition, compared with 1,5- and 2,6-disubstituted and other monosubstituted anthraquinone derivatives, 1,4-disubstituted anthraquinone derivatives with lower energy gap between HOMO and LUMO of the molecular systems are more prone to get deep color shades [19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Dyeing Method and Properties of a Novel Blue Azo-Anthraquinone Reactive Dye on Cotton

2019

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A novel blue azo-anthraquinone reactive dye was evaluated in the dyeing of cotton by using a dip–pad–steam process. Dyeing method and properties were examined in detail and the results showed that the dyeing method consisting of dye concentration of 25 g/L, sodium carbonate of 12 g/L, dipping time of 3 min and steaming time of 30 min was the most effective when a conventional “one-dip–one-nip” process was used. The fixation of the dyes on cotton could reach up to 93.4%, the wash and rub fastness both reached grade 4 above, and the light fastness reached grade 4–5 above. Such colored cotton showed very close colorimetric properties.

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Reactive Dyes

Cited by 6 publications

References 37 publications

Biomimetic electrospinning for fabrication of poly(lactic acid)/graphite oxide/poly(dopamine) nanofiber membrane

Biomimetic electrospinning for fabrication of poly(lactic acid)/graphite oxide/poly(dopamine) nanofiber membrane

Removal Of Sumifix Yellow EXF Reactive Azo Dye By Electro-Fenton Method

Dyeing Method and Properties of a Novel Blue Azo-Anthraquinone Reactive Dye on Cotton

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