Indigo Dyeing of Cotton using Alkaline Catalase and Additives

Sodium hydrosulfite is universally applied as a reducing agent for the reduction of indigo, but also produces hazardous by-products viz. sulfate, sulfite, and thiosulfate ions with harmful effects on the environment due to their toxicity, as well as corrosive effects on the waste lines. To overcome these problems, use of an ecofriendly reducing agent, viz. alkaline catalase, along with iron (II) sulfate, was used in place of sodium hydrosulfite for dyeing of cotton with indigo. Dyed samples were characterized by attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy and scanning electron microscopy (SEM). The alkaline catalase with iron (II) sulfate reducing system produced the same reduction potential in dyebaths, reduction bath stability, surface color strength, and color fastness properties of dyed cotton compared to sodium hydrosulfite use.

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INVESTIGATION OF INDIGO DYEING USING SODIUM BOROHYDRIDE AS REDUCING AGENT

CBU International Conference Proceedings ◽

10.12955/cbup.v5.1071 ◽

2017 ◽

Vol 5 ◽

pp. 1061-1063

Author(s):

Banu YeĹźim Buyukakinci ◽

Nihal Sokmen

Keyword(s):

Cotton Fabric ◽

Sodium Borohydride ◽

Reducing Agent ◽

Fastness Properties ◽

Sodium Hydrosulfite ◽

Color Yield ◽

The World ◽

Indigo Dyeing ◽

Blue Jeans ◽

Textile Sector

Indigo, one of the oldest dyes, has a very important role for the textile sector. It is primarily used to dye cotton clothes, and blue jeans and over one billion pairs of jeans around the world are dyed blue with indigo. Although Sodium Hydrosulfite (Na2S2O4) is used as a reducing agent in most indigo dyeing processes, it is environmentally unfavorable because of the resultant contaminated toxic wastewater. In addition, the color fastnesses of dyed samples using Na2S2O4 as reducing agent are not good enough.In the present paper sodium borohydride (NaBH4) were used as ecologically safe reduction systems for the indigo dyeing of cotton fabric. After dyeing processes, the color yield and fastnesses according to washing and rubbing were measured, and results were compared.It was found when NaBH4 was used as reducing agent instead of Na2S2O4, the color yield and the fastness properties of the dyed samples improved.

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Optimized Vatting Condition Study for Natural Indigo Dyeing on Silk Yarn

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.535.749 ◽

2014 ◽

Vol 535 ◽

pp. 749-752

Author(s):

Suchada Ujjin ◽

Jantip Setthayanond

Keyword(s):

Reducing Agent ◽

Fastness Properties ◽

Color Strength ◽

Optimum Ph ◽

Different Temperatures ◽

Indigo Dyeing ◽

Indigo Dye ◽

Short Time ◽

Indigofera Tinctoria ◽

Silk Yarn

This research studied the optimized dyeing conditions for natural indigo dye (Indigofera tinctoria) on silk yarn. Vatting of natural indigo dye was investigated under different temperatures and times and the natural dyeing auxiliaries were used i.e. tamarind and ash solutions. The results informed the optimum vatting condition for the indigo dye at 90°C for 30 minutes and the optimum pH was 12. The sugars in tamarind solution was expected to work as a reducing agent for dye vatting whereas the ash solution derived from banana barks was used as an alkalinity controller. Dyeing silk yarns with leuco indigo dye under a short time (5 minutes) provided a complete dye distribution with satisfactory color strength on silk and very good fastness properties.

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Utilization of fruit by-products for organic reducing agent in indigo dyeing

Fibers and Polymers ◽

10.1007/s12221-013-2027-x ◽

2013 ◽

Vol 14 (12) ◽

pp. 2027-2031 ◽

Cited By ~ 6

Author(s):

Younsook Shin ◽

Min Choi ◽

Dong Il Yoo

Keyword(s):

Reducing Agent ◽

Indigo Dyeing ◽

By Products

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Zwitterionic molecule layer for inhibiting microbial corrosion of copper alloy

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-12-2016-1744 ◽

2018 ◽

Vol 65 (1) ◽

pp. 46-52

Author(s):

Fengling Xu ◽

Zhenghui Qiu ◽

Ri Qiu ◽

Jiadong Yang ◽

Cunguo Lin

Keyword(s):

Electrochemical Impedance ◽

Chemical Vapor ◽

Attenuated Total Reflectance ◽

Microbial Corrosion ◽

Content Type ◽

Sulfate Reducing ◽

Angle Measurements ◽

Static Contact ◽

Contact Angle Measurements ◽

Reducing Bacteria

Purpose For mitigating biocorrosion induced by sulfate-reducing bacteria (SRB) in seawater, the zwitterionic molecule layer (ZML) of poly (sulfobetaine methacrylate) is grafted onto B10 surface by chemical vapor deposition and surface-initiated atom transfer radical polymerization. Design/methodology/approach Energy-dispersive spectroscopy-attenuated total reflectance Fourier transform infrared spectroscopy and static contact angle measurements are used to characterize the as-formed layer. Findings After surface modification, B10 can significantly reduce SRB adhesion, demonstrating the good antifouling property. Further, the biocorrosion inhibition is investigated by potentiodynamic polarization and electrochemical impedance spectroscopy, indicating that ZML exhibits high resistance to biocorrosion with inhibition efficiency of approximately 90 per cent. Originality/value ZML performs a dual feature, i.e. antifouling film and corrosion inhibitor, for the biocorrosion inhibition.

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Bioaerosols in industrial environments: a reviewThis article is one of a selection of papers published in this Special Issue on Biological Air Treatment.

Canadian Journal of Civil Engineering ◽

10.1139/l09-117 ◽

2009 ◽

Vol 36 (12) ◽

pp. 1873-1886 ◽

Cited By ~ 25

Author(s):

Yan Gilbert ◽

Caroline Duchaine

Keyword(s):

Air Quality ◽

Main Concern ◽

Airborne Microorganisms ◽

Wood Processing ◽

Sample Characterization ◽

Air Sample ◽

Agricultural Industries ◽

Harmful Effects ◽

By Products ◽

Selection Of

Air quality in workplaces is a main concern for industrial hygienists and occupational health specialists. Aerosolization of microorganisms or their by-products from contaminated material can significantly decrease the air quality and expose the workers’ health to potentially harmful effects. To identify the risks and elaborate safe exposure thresholds, the microbiology of air samples from industrial workplaces must be characterized, which means the airborne microorganisms must be identified and quantified. This review summarizes, for nonbiologist specialists, the principal sampling and analysis techniques for air sample characterization regarding microbiological contamination. A survey of the literature regarding levels of airborne bacteria, fungi, and viruses in agricultural industries, waste management plants, peat and wood processing facilities, and other industries is also provided. This review shows that very complex bioaerosol sources are present in industrial settings, and variable and hardly predictable biodiversity is expected in such environments.

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One-pot, three-component synthesis of secondary amines and trisubstituted hydrazines from ketones

Chemical Papers ◽

10.2478/s11696-006-0056-2 ◽

2006 ◽

Vol 60 (4) ◽

Cited By ~ 2

Author(s):

H. Tavakol ◽

S. Zakery

Keyword(s):

Diethyl Ether ◽

Good Yield ◽

Lithium Perchlorate ◽

Reducing Agent ◽

Secondary Amines ◽

Reduction Step ◽

One Pot ◽

By Products

AbstractVarious imines and hydrazones were reduced to the corresponding amines and hydrazines using borane-tetrahydrofuran complex as a reducing agent in the solution of lithium perchlorate in diethyl ether. The initial imines or hydrazones have been prepared at the same conditions just before the reduction step. Both steps were carried out in one vessel with a good yield and insignificant formation of by-products.

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The Comparison between a Natural Reducing Agent and Sodium Dithionite in Vat, Indigo and Sulphur Dyeing on Cotton Fabric

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.441.207 ◽

2012 ◽

Vol 441 ◽

pp. 207-211 ◽

Cited By ~ 1

Author(s):

Zahra Motaghi

Keyword(s):

Textile Industry ◽

Waste Water Treatment ◽

Sodium Dithionite ◽

Reducing Agent ◽

Point Of View ◽

Color Strength ◽

Dyeing Process ◽

Pollution Problem ◽

Textile Dyeing ◽

Substance Consumption

In recent years, the use of low-environmental impact biotechnology giving rises to new types of treatment in the textile industry. From the environmental point of view, particularly the textile dyeing process constitutes a major pollution problem due to the variety and complexity of chemicals employed. In most industrial vat and indigo, sulphur dyeing processes, all of them are reduced mainly using sodium dithionite. This process produces large amounts of hazardous by-products which increase the costs for waste water treatment. Hence, many attempts are being made to replace the environmentally unfavorable sodium dithionite by ecologically more attractive alternatives, such as organic reducing agents or catalytic hydrogenation and natural reducing agent. In this paper ,a natural reducing agent is introduced that comes from a plant and have been studied on the substance for comparison it with sodium dithionite on vat, indigo and sulphur dyeing on cotton fabrics. The color strength of the samples was analyzed by Reflective Spectrophotometer and the color fastness of them was investigated. The results show that, the use of natural reducing agent in natural indigo dye and sulphur dye is better and for the rest of them has almost good advantage, but it cannot reduce synthetic indigo as well as sodium dithionite. Therefore, with introducing the substance, consumption of chemicals is minimized and vat, indigo and sulphur dyeing should be environmental.

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