CN104098211A - Method for improving decoloration ratio of wastewater from reactive dye printing - Google Patents
Method for improving decoloration ratio of wastewater from reactive dye printing Download PDFInfo
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- CN104098211A CN104098211A CN201410385432.9A CN201410385432A CN104098211A CN 104098211 A CN104098211 A CN 104098211A CN 201410385432 A CN201410385432 A CN 201410385432A CN 104098211 A CN104098211 A CN 104098211A
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Abstract
The invention relates to a method for improving the decoloration ratio of wastewater from reactive dye printing, and belongs to the technical field of textile dyeing and printing. The method comprises the following steps of: adjusting the pH value of the wastewater from reactive dye printing to be neutral, slowly adding 0.5-2g/L calcium chloride and stirring to dissolve, and removing generated suspended solid by a millipore filter; adding 0.5-1g/L iso-decanol polyoxyethylene ether (the epoxy value is 7), and holding for 15 min after stirring uniformly, and at last photocatalytically decoloring the painting wastewater by using titanium dioxide. According to the method, the photocatalytic decoloration effect of the titanium dioxide on the wastewater from reactive dye printing can be effectively improved, and chromaticity of the printing wastewater can be reduced.
Description
Technical field
The present invention relates to a kind of method that improves reactive dye printing waste water percent of decolourization, particularly improve the percent of decolourization while utilizing titanium dioxide to carry out photochemical catalysis to reactive dye printing waste water, belong to technical field of textile printing.
Background technology
Reactive dyestuffs excellent performance, be widely used in pure cotton fabric directly, in the printing technology such as resist printing and discharge.When stamp, reactive dyestuffs and thickener, auxiliary agent etc. are mixed with the mill base with certain viscosity, be printed on fabric after through oven dry, decatize or bake and make dyestuff and fiber-reactive.Conventionally, the degree of fixation of reactive dyestuffs only has 70% left and right, and the dyestuff of fixation and thickener, auxiliary agent etc. need to, by thorough eccysis of operation such as washing, soap, finally not discharge with printing waste water.
The critical process of reactive dye printing waste water processing is decoloured to it exactly, reduces the colourimetric number of waste water, makes it reach the primary standard of discharge.Method to reactive dyestuffs decolouring is a lot, and the method for wherein utilizing optically catalytic TiO 2 effect to realize active dye wastewater decolouring has obtained paying close attention to widely and using.But the Photocatalytic Degradation Process of titanium dioxide is not only limited by the photocatalytic activity of self, is also affected by other factors.The composition such as all kinds of thickeners, auxiliary agent containing in substantial activity dye printing waste water all will produce certain influence to its decolorizing effect.Conventionally,, for making printing paste system reach best rheology effect, printing with reactive dye often selects sodium alginate and emulsion thickening as thickening thickener.After stamp, most sodium alginates and emulsion thickening all will be removed and enter into printing waste water from fabric face.Sodium alginate is a kind of polymer thickener being made up of mannonic acid and the surplus base of golonic acid, in the time coexisting in the aqueous solution with titanium dioxide, can produce obvious restraining effect to its photocatalysis effect.Emulsion thickening is the emulsion being formed through high-speed stirring under the existence of emulsifying agent by petroleum solvent and two kinds of immiscible liquid of water, when from the eccysis of PRINTED FABRIC surface to waste water time, break milk separation easily occurs, and also can cause the loss of optically catalytic TiO 2 effect.Therefore, directly utilize titanium dioxide reactive dye printing waste water to be carried out to the poor effect of Photocatalytic Decoloration, do not reach decolouring processing requirements.
Summary of the invention
The object of the invention is to provide a kind of method of titanium dioxide to reactive dye printing waste water Photocatalytic Decoloration effect that improve, and reduces the colourity of printing waste water, alleviates the pressure of subsequent wastewater treatment.
The present invention includes following step: reactive dye printing waste water pH value is adjusted to neutrality, slowly adds 0.5-2g/L calcium chloride and stir to make it to dissolve, then with millipore filtration, the suspended solid generating is removed; Under ultrasound condition, add 0.5-1g/L isomery ten polyoxyethylenated alcohol (epoxy number is 7) and stir to keep 15min, finally above-mentioned printing waste water is carried out to conventional optically catalytic TiO 2 decolouring.
When printing with reactive dye fixation, need to use the alkaline agents such as sodium carbonate, therefore reactive printing waste water meta-alkalescence, first regulates wastewater pH to neutral with acetic acid.Slowly add 0.5-2g/L calcium chloride and stir to make it to dissolve, make the sodium alginate rapid reaction in waste water form suspended solid and remove by millipore filtration.Subsequently, under ultrasound condition, add 0.5-1g/L isomery ten polyoxyethylenated alcohol (epoxy number is 7) and stir maintenance 15min.Isomery ten polyoxyethylenated alcohol (epoxy number is 7) are a kind of nonionogenic tensides, can eliminate emulsion thickening and the impact of residual calcium ion on titanium dioxide decolorizing effect in waste water.Finally, above-mentioned waste water is carried out to conventional optically catalytic TiO 2 decolouring, excitation light source is that conventional predominant wavelength is 365nm ultraviolet lamp.
Embodiment
Further illustrate the present invention below by embodiment and comparative example.
embodiment 1
Active red dye printing waste water pH value is adjusted to neutrality, slowly adds 0.5g/L calcium chloride and stir to make it to dissolve, then with millipore filtration, the suspended solid generating is removed; Under ultrasound condition, add 0.5g/L isomery ten polyoxyethylenated alcohol (epoxy number is 7) and stir to keep 15min, finally above-mentioned printing waste water is carried out to conventional optically catalytic TiO 2 decolouring.After completing, measuring this printing waste water percent of decolourization is 92%.
comparative example 1
The active red dye printing waste water pH value identical with embodiment 1 is adjusted to neutrality, with filtering with microporous membrane, waste water carried out to the conventional optically catalytic TiO 2 decolouring identical with embodiment 1.After completing, measuring this printing waste water percent of decolourization is 21%.
embodiment 2
Yellow reactive dyes printing waste water pH value is adjusted to neutrality, slowly adds 1g/L calcium chloride and stir to make it to dissolve, then with millipore filtration, the suspended solid generating is removed; Under ultrasound condition, add 0.5g/L isomery ten polyoxyethylenated alcohol (epoxy number is 7) and stir to keep 15min, finally above-mentioned printing waste water is carried out to conventional optically catalytic TiO 2 decolouring.After completing, measuring this printing waste water percent of decolourization is 90%.
comparative example 2
The Yellow reactive dyes printing waste water pH value identical with embodiment 2 is adjusted to neutrality, with filtering with microporous membrane, waste water carried out to the conventional optically catalytic TiO 2 decolouring identical with embodiment 2.After completing, measuring this printing waste water percent of decolourization is 34%.
embodiment 3
Reactive blue dye printing waste water pH value is adjusted to neutrality, slowly adds 2g/L calcium chloride and stir to make it to dissolve, then with millipore filtration, the suspended solid generating is removed; Ultrasound condition adds 1g/L isomery ten polyoxyethylenated alcohol (epoxy number is 7) and the maintenance 15min that stirs, and finally above-mentioned printing waste water is carried out to conventional optically catalytic TiO 2 decolouring.After completing, measuring this printing waste water percent of decolourization is 88%.
comparative example 3
The reactive blue dye printing waste water pH value identical with embodiment 3 is adjusted to neutrality, with filtering with microporous membrane, waste water carried out to the conventional optically catalytic TiO 2 decolouring identical with embodiment 3.After completing, measuring this printing waste water percent of decolourization is 17%.
Can find out, in embodiment, the percent of decolourization of reactive printing waste water is all significantly higher than percent of decolourization in comparative example, shows that this inventive method is effective.
Claims (1)
1. one kind is improved the method for reactive dye printing waste water percent of decolourization, it is characterized in that adopting following methods: reactive dye printing waste water pH value is adjusted to neutrality, slowly add 0.5-2g/L calcium chloride and stir to make it to dissolve, then with millipore filtration, the suspended solid generating is removed; Under ultrasound condition, add 0.5-1g/L isomery ten polyoxyethylenated alcohol (epoxy number is 7) and stir to keep 15min, finally above-mentioned printing waste water is carried out to conventional optically catalytic TiO 2 decolouring.
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| CN201410385432.9A CN104098211B (en) | 2014-08-07 | 2014-08-07 | A kind of method improving reactive dye printing waste water percent of decolourization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858844A (en) * | 2016-05-30 | 2016-08-17 | 安徽国能亿盛环保科技有限公司 | Composite flocculating agent for treating printing and dyeing wastewater |
| CN109052741A (en) * | 2016-01-19 | 2018-12-21 | 青岛大学 | A kind of synchronous decoloration of printing waste water and nitrogen recovery and treatment method |
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2014
- 2014-08-07 CN CN201410385432.9A patent/CN104098211B/en not_active Expired - Fee Related
Non-Patent Citations (2)
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| 柳荣展等: "蜡防印花生产废水处理工艺", 《水处理技术》, vol. 32, no. 9, 30 September 2006 (2006-09-30), pages 72 - 1 * |
| 陈益宾等: "甲基橙模拟印染废水的絮凝与光催化联用处理", 《福建轻纺》, no. 10, 31 October 2012 (2012-10-31) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052741A (en) * | 2016-01-19 | 2018-12-21 | 青岛大学 | A kind of synchronous decoloration of printing waste water and nitrogen recovery and treatment method |
| CN109052741B (en) * | 2016-01-19 | 2021-08-03 | 青岛大学 | Synchronous decoloring and nitrogen recovery treatment method for printing wastewater |
| CN105858844A (en) * | 2016-05-30 | 2016-08-17 | 安徽国能亿盛环保科技有限公司 | Composite flocculating agent for treating printing and dyeing wastewater |
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| CN104098211B (en) | 2015-12-09 |
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