Photocatalysis treating method for dyeing wastewater of polyester/cotton one bath process dyeing

Abstract

The invention discloses a photocatalysis treating method for dyeing wastewater of polyester / cotton one bath process dyeing. The method comprises the steps that 1, titanium alkoxide is dropwise added into an acid water solution under a violent stirring effect, the temperature is increased to 45-65 DEG C, continuous and violent stirring is carried out for 10-25 h, and prepared titanium dioxide nanometer hydrosol is used as a modified coating of cotton fabric; 2, cotton machine woven fabric is coated with the titanium dioxide nanometer hydrosol through dipping, roller pressing and curing; 3, the titanium dioxide modified fabric is shorn into multiple blocks, and the blocks are placed into bath liquid left after dyeing; processing liquid is exposed under sunlight. The cotton fabric with photocatalysis activity is prepared, the surface of the fabric is coated with a layer of nano TiO2 photocatalyst, and residual dye wastewater can be effectively photocatalyzed and degraded under irradiation of sunlight.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for photocatalytically treating dyed wastewater in polyester / cotton one-bath dyeing that realizes zero wastewater discharge. Background technique [0002] Polyester / cotton blended fabric is widely liked by the public, and this is because this blended fabric combines the common advantages of polyester fiber (trade name: polyester fiber) and cotton fiber. For example, the comfort and breathability of cotton fibers and the better mechanical properties of synthetic polyester fibers. However, dyeing becomes difficult when the two fibers are blended together. Generally, the traditional dyeing method is based on a variety of two-bath methods to dye blended fabrics, which can endow the dyed fabrics with better wet rubbing fastness. However, the two-bath method is time-consuming and expensive to operate. The reduction cleaning process will cause structural damage to reactive dye...

AI Technical Summary

Problems solved by technology

[0003] However, any dyeing process will leave more or less dyeing wastewater

If these dyed wastewater are directly discharged into nature, it will lead to bad consequences

For example, the color of dyed wastewater will not only destroy the natural beauty of nature, but also the toxicity of dyes will cause fatal harm to aquatic animals and plants

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