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Here is a short description of the Remediation Technologies of Textile Effluents. Textile industries use large volumes of water and chemicals for the wet process of textiles. The chemical reagents used are terribly various in chemical composition, ranging from inorganic compounds to polymers and organic merchandise. The low concentration of dyes in the effluent is extremely visible and undesirable. There are additional than a hundred,000 commercially available dyes with over 7X105 tonnes of color created annually.
Remediation Technologies of Textile Effluents can be divided as follows
- Chemical methods for dye removal
- Physical Treatment for dye removal
- Membrane Filtration
- Ion exchange
- Irradiation
- Electro-kinetic coagulation
Chemical Method for Dye Removal
Oxidative Processes: This is the foremost normally used technique of decolorization by chemical means, mainly due to its simplicity of application. Chemical reaction removes the dye from the dye-containing effluent by oxidation ensuing in the aromatic bond of the dye molecules. We have mentioned before about various strategic like,
Fenton reagent
Ozonation
Photochemical, etc.
Physical Treatment for dye removal
Adsorption: These techniques have gained favor recently due to their efficiency within the removal of pollutants too stable for standard strategies. The major techniques are
Activated carbon
Peat,
Wood chips.
Fly Ash/coal.
Silica gel.
Membrane Filtration
This method clarifies, concentrate, and separate dye continuously from effluent. It has some special features unrivaled by different strategies, they are,
- Resistance to temperature.
- Resistance to the adverse chemical environment.
- Microbial attack
This method is appropriate for water employment inside a textile dye plant if the effluent has a low amount of dyes.
Ion exchange
Ion exchange has not been widely used for the treatment of dye-containing effluents, mainly due to the opinion that particle exchangers can’t accommodate a large variety of dyes. Wastewater is passed over the activity organic compound until the offered exchange sites area unit saturated. Both ion and ion dyes will be off from the dye-containing effluent in this manner. A major disadvantage is that the cost of operation and preparation of the organic compound.
Irradiation
Sufficient quantities of dissolved O area unit needed for organic substances to be broken down effectively by radiation. Dissolved O is consumed terribly chop-chop and therefore a relentless and adequate provide of oxygen is needed. This is very pricey.
Electro-kinetic coagulation
This is the economically feasible technique of dye removal. It involves the addition of ferrous sulfate and metal chloride, allowing the wonderful removal of direct dyes from wastewaters. Production of large quantity of sludge is occurred and exerts high disposal value of sludge.
