A critical review on recent advancements of the removal of reactive dyes from dyehouse effluent by ion-exchange adsorbents.
By M. M. Hassan, C. Carr. Chemosphere, 2018
691 citations recorded by the source corpus.
The effluent discharged by the textile dyehouses has a seriously detrimental effect on the aquatic environment. Some dyestuffs produce toxic decomposition products and the metal complex dyes release toxic heavy metals to watercourses. Of the dyes used in the textile industry, effluents containing reactive dyes are the most difficult to treat because of their high water-solubility and poor absorption into the fibers. A range of treatments has been investigated for the decolorization of textile effluent and the adsorption seems to be one of the cheapest, effective and convenient treatments. In this review, the adsorbents investigated in the last decade for the treatment of textile effluent containing reactive dyes including modified clays, biomasses, chitin and its derivatives, and magnetic ion-exchanging particles have been critically reviewed and their reactive dye binding capacities have been compiled and compared. Moreover, the dye binding mechanism, dye sorption isotherm models and also the merits/demerits of various adsorbents are discussed. This review also includes the current challenges and the future directions for the development of adsorbents that meet these challenges. The adsorption capacities of adsorbents depend on various factors, such as the chemical structures of dyes, the ionic property, surface area, porosity of the adsorbents, and the operating conditions. It is evident from the literature survey that decolorization by the adsorption shows a great promise for the removal of color from dyehouse effluent. If biomasses want to compete with the established ion-exchange resins and activated carbon, their dye binding capacity will need to be substantially improved.
Subfields: Analytical Chemistry, Organic Chemistry, Water Science and Technology
View Paper: https://www.semanticscholar.org/paper/2b4a16941859123609574f3fdd717a9f375f79f9
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In Analytical Chemistry
In Organic Chemistry
In Water Science and Technology
Citations in the corpus
- A critical review on advances in the practices and perspectives for the treatment of dye industry wastewater (2020, background): “Dyes exhibit high solubility in water and make it more difficult to be removed by conventional procedures [7].”
- Efficiency of Sawdust as Low-Cost Adsorbent for Dyes Removal (2020, background): “Sometimes, they are classified by their application or by their solubility in water; vat, azoic, sulfur, and disperse dyes are insoluble, while reactive, direct, basic, and acid dyes are highly soluble [16].”