Optimization and modeling of decolorization and COD reduction of reactive dye solutions by ultrasound-assisted adsorption

2006 ◽  
Vol 119 (2-3) ◽  
pp. 175-181 ◽  
Author(s):  
Enes Şayan
Keyword(s):  
Reactive Dye ◽  
Cod Reduction ◽  
Ultrasound Assisted ◽  
Dye Solutions

Treatment of reactive dye solutions by physicochemical combined process

2009 ◽  
Vol 12 (1-3) ◽  
pp. 202-209 ◽  
Author(s):  
A.Z. Bouyakoub ◽  
S. Kacha ◽  
B. Lartiges ◽  
S. Bellebia ◽  
Z. Derriche
Keyword(s):  
Reactive Dye ◽  
Combined Process ◽  
Dye Solutions

scholarly journals Jetting Performance of Polyethylene Glycol and Reactive Dye Solutions

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 739 ◽  
Author(s):  
Zhiyuan Tang ◽  
Kuanjun Fang ◽  
Yawei Song ◽  
Fuyun Sun
Keyword(s):  
Surface Tension ◽  
Polyethylene Glycol ◽  
Production Efficiency ◽  
Hydrophobic Interactions ◽  
Reactive Dye ◽  
Droplet Formation ◽  
Visible Absorption ◽  
Fluid Behavior ◽  
Spherical Droplets ◽  
Dye Solutions

The jetting performance of dye inks determines the image quality, production efficiency, and lifetime of the print head. In the present study, we explored the jetting performance of mixed solutions of polyethylene glycol (PEG) and reactive dye by testing the visible absorption spectra, rheological properties, and surface tension, in addition to the observation of droplet formation. The results indicate that PEG macromolecules could change the aggregate groups of Red 218 molecules into smaller ones through hydrophobic interactions and separation effect. The addition of PEG into the dye solution increased the viscosity and decreased the surface tension. In the whole shear rate range tested, the 10% and 20% PEG400, as well as the 30% PEG200 dye solutions, showed good Newtonian fluid behavior. PEG macromolecules improved the droplet formation of the dye solutions. Increasing the PEG400 concentration to 30% and 40% resulted in elimination of the formation of satellites and the formation of ideal droplets at 10,000 Hz jetting frequency. A 30% PEG600-dye solution with the Z value of 4.6 formed the best spherical droplets at 10,000 Hz and produced perfect color images on cotton fabrics.

Effects of reactive dye structures on surface tensions and viscosities of dye solutions

2019 ◽  
Vol 287 ◽  
pp. 110932 ◽  
Author(s):  
Kun Zhang ◽  
Ruyi Xie ◽  
Kuanjun Fang ◽  
Weichao Chen ◽  
Zhen Shi ◽  
...  
Keyword(s):  
Reactive Dye ◽  
Surface Tensions ◽  
Dye Solutions

Efficiency of the Coagulation-Flocculation Method for the Treatment of Dye Mixtures Containing Disperse and Reactive Dye

2007 ◽  
Vol 42 (1) ◽  
pp. 54-62 ◽  
Author(s):  
Pei Wen Wong ◽  
Tjoon Tow Teng ◽  
Nik Abdul Rahman Nik Norulaini
Keyword(s):  
Oxygen Demand ◽  
Textile Wastewater ◽  
Reactive Dye ◽  
Settling Time ◽  
Test Method ◽  
Colour Removal ◽  
Cod Reduction ◽  
Jar Test ◽  
Wastewater Samples ◽  
Ph Range

Abstract The coagulation-flocculation method was used to treat aqueous solutions containing varying ratios of commercial disperse and reactive dyes. The effectiveness of this method was assessed using such coagulants as alum, polyaluminium chloride (PACl) and MgCl2, and an anionic coagulant aid. The jar test method was used to measure the effects of pH and coagulant type and dosage on colour removal and chemical oxygen demand (COD) reduction. The effect of coagulant aid on floc settling time was also measured. The results showed that the coagulant dosage needed to achieve optimum colour removal and COD reduction increased as the percentage of reactive dye in the mixture increased. Alum and PACl performed effectively in a lower pH range (pH 3.8 to 5.2), whereas MgCl2 performed effectively in a higher pH range (pH 10.4 to 10.9). PACl was more effective than MgCl2 and alum, achieving >99% colour removal and 96.3% COD reduction using a smaller quantity of the coagulant. The addition of coagulant aid improved floc settling time. These results show that PACl is more effective than MgCl2 and alum in removing both colour and COD in the treatment of the industrial textile wastewater samples.

Pd–Pt/Al2O3 bimetallic catalysts for the advanced oxidation of reactive dye solutions

2003 ◽  
Vol 87 (1-4) ◽  
pp. 51-57 ◽  
Author(s):  
Sung-Chul Kim ◽  
Hwi-Hye Park ◽  
Dong-Keun Lee
Keyword(s):  
Bimetallic Catalysts ◽  
Advanced Oxidation ◽  
Reactive Dye ◽  
Dye Solutions

Flocculated decolorization of vinylsulfone reactive dye solutions with a β-cyclodextrin-based copolymer

2010 ◽  
Vol 118 (1) ◽  
pp. 480-485 ◽  
Author(s):  
Xiuzhi Tian ◽  
Dan Wu ◽  
Jing Zhang ◽  
Shugen Wang ◽  
Xue Jiang
Keyword(s):  
Reactive Dye ◽  
Dye Solutions
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