Dyes for Cellulosic Fibers

Waring, David R.

doi:10.1007/978-1-4684-7715-3_3

Cited by 24 publications

(25 citation statements)

References 32 publications

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“…Color intensity is reinforced by the presence of substituents, capable of participating to the electron delocalization, and called auxochromes. These are often involved in other important properties, such as the solubility of the dye in water (or sometimes in non-aqueous solvents) as well as its affinity and solidity [166,174].…”

Section: Textile Dyesmentioning

confidence: 99%

Immobilized Lignin Peroxidase-Like Metalloporphyrins as Reusable Catalysts in Oxidative Bleaching of Industrial Dyes

et al. 2016

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Synthetic and bioinspired metalloporphyrins are a class of redox-active catalysts able to emulate several enzymes such as cytochromes P450, ligninolytic peroxidases, and peroxygenases. Their ability to perform oxidation and degradation of recalcitrant compounds, including aliphatic hydrocarbons, phenolic and non-phenolic aromatic compounds, sulfides, and nitroso-compounds, has been deeply investigated. Such a broad substrate specificity has suggested their use also in the bleaching of textile plant wastewaters. In fact, industrial dyes belong to very different chemical classes, being their effective and inexpensive oxidation an important challenge from both economic and environmental perspective. Accordingly, we review here the most widespread synthetic metalloporphyrins, and the most promising formulations for large-scale applications. In particular, we focus on the most convenient approaches for immobilization to conceive economical affordable processes. Then, the molecular routes of catalysis and the reported substrate specificity on the treatment of the most diffused textile dyes are encompassed, including the use of redox mediators and the comparison with the most common biological and enzymatic alternative, in order to depict an updated picture of a very promising field for large-scale applications.

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Section: Textile Dyesmentioning

confidence: 99%

Immobilized Lignin Peroxidase-Like Metalloporphyrins as Reusable Catalysts in Oxidative Bleaching of Industrial Dyes

et al. 2016

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“…Dyes remaining in discharged wastewater cause aesthetic problems and damage the quality of the receiving water because color impedes light penetration and can be toxic to aquatic life. The organic load concentration (biochemical and chemical oxygen demand) of cotton-textile wastewater is equivalent to a medium-polluted municipal wastewater (Waring, 1990).…”

Section: Introductionmentioning

confidence: 99%

Cotton‐Textile Wastewater Management: Investigating Different Treatment Methods

Georgiou

Aivasidis

2012

Water Environment Research

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BSTRACT: The cotton-textile industry consumes significant amounts of water during manufacturing, creating high volumes of wastewater needing treatment. The organic-load concentration of cotton-textile wastewater is equivalent to a medium-strength municipal wastewater; the color of the water, however, remains a significant environmental issue. This research, in cooperation with a cotton-textile manufacturer, investigated different treatment methods and different combinations of methods to identify the most cost-effective approaches to treating textile wastewater. Although activated-sludge is economical, it can only be used as part of an integrated wastewater management system because it cannot decolorize wastewater. Coagulation/flocculation methods are able to decolorize cotton-wastewater; however, this process creates high amounts of wastewater solids, thus significantly increasing total treatment costs. Chemical oxidation is an environmentally friendly technique that can only be used as a polishing step because of high operating costs. Anaerobic digestion in a series of fixed-bed bioreactors with immobilized methanogens using acetic acid as a substrate and a pH-control agent followed by activated-sludge treatment was found to be the most cost-effective and environmentally safe cottontextile wastewater management approach investigated. Water Environ. Res., 84, 54 (2012).

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“…They are complex organic compounds non-biodegradable by at least common aerobic microbes (activated-sludge) [9,10]. However, the above dyes decompose under highly reductive conditions leading to the formation of the so-called aromatic amines, which, in general, have proved degradable (under aerobic biological conditions) by numerous researchers over the recent years [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%