CN105293792A - Method for treating printing and dyeing wastewater by adopting diketone compound - Google Patents
Method for treating printing and dyeing wastewater by adopting diketone compound Download PDFInfo
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- CN105293792A CN105293792A CN201510856787.6A CN201510856787A CN105293792A CN 105293792 A CN105293792 A CN 105293792A CN 201510856787 A CN201510856787 A CN 201510856787A CN 105293792 A CN105293792 A CN 105293792A
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Abstract
The invention discloses a method for treating printing and dyeing wastewater by adopting a diketone compound. The method comprises the following steps of (1) removing suspended particulate matters in the wastewater by adopting plate-frame pressure filtration; (2) adding 2,5-hexanedione into filtered wastewater, and uniformly stirring at the rotating speed of 500 to 800r/min; (3) irradiating a water body obtained in step (2) by adopting an ultraviolet source of 5 to 15mW/cm<2>. By utilizing the photooxidation activity characteristics of the diketone compound under the irradiation of ultraviolet light, the efficient and rapid decoloration of the dye wastewater can be realized, and the method can be used for the treatment of the printing and dyeing wastewater and a polluted water body subjected to being polluted by dye.
Description
Technical field
The present invention relates to the technical field for the treatment of of dyeing and printing, especially relate to a kind of method utilizing dyestuff in the photolytic activity oxidized waste water of diketone compound.
Background technology
The large percentage that dyeing waste water is shared in China's trade effluent.Dyeing waste water has that organic content is high, complicated component, colourity are dark, change of water quality is large, chemical oxygen demand (COD) and biochemical oxygen demand (BOD) all comparatively high, belongs to unmanageable trade effluent.A lot of dyestuff (such as tropeolin-D, Congo red and rhodamine B etc.) has carinogenicity.Even if the concentration of Wastewater Dyes is very low, water body transmittance after entering water body, also can be caused to decline, thus detrimentally affect is caused to aquatic ecosystem water body natural landscape of unifying.Therefore, along with the increasingly stringent of environmental standard, need the technology of efficient degradation waste water from dyestuff badly.
At present, the treatment process of waste water from dyestuff mainly comprises Physical, chemical method and biological process.Applying maximum in physical treatment process is absorption method, due to adsorbent reactivation difficulty, its application is restricted.Membrane separation process processing efficiency is high, but concentration polarization and fouling membrane phenomenon make membrane flux extend with working time and constantly decline, and limit its application in dye wastewater treatment.It is large that coagulant sedimentation in chemical method produces body refuse amount, to hydrophilic dye poor processing effect.Biological process utilizes the metabolism of microorganism to realize degraded to dyestuff, but due to the biodegradability of waste water from dyestuff can be poor, the decolorizing efficiency of this method is lower.
Photooxidation method is a kind of organic method of efficient degradation that development in recent years is got up, and has that reaction conditions gentleness, oxidation efficiency are high, the feature of wide accommodation.Photooxidation method mainly comprises heterogeneous photooxidation method and homogeneous phase photooxidation method.In heterogeneous photooxidation method, most study is conductor photocatalysis method, and owing to being subject to the restriction of rate of mass transfer, the oxidation efficiency of this method is not as homogeneous phase photooxidation method.In common homogeneous phase photooxidation method, UV/O
3its ozone of method need be prepared at the scene, and running cost is higher, and UV/Fenton method can produce a large amount of mud, needs to process further, and UV/H
2o
2the decolorizing efficiency of method is not then very desirable, and is easily subject to the impact of the organic pollutant coexisted in water body.
Summary of the invention
For the problems referred to above that prior art exists, the applicant provides a kind of method adopting diketone compound treatment of dyeing and printing.The inventive method utilizes diketone compound under the irradiation of UV-light, have the feature of photoxidation activity, realizes the efficient quick decolorization of waste water from dyestuff, can be applicable to dyeing waste water and the process by dyestuff polluted-water.
Technical scheme of the present invention is as follows:
Adopt a method for diketone compound treatment of dyeing and printing, described method comprises the steps:
(1) suspended particulate matter in filter press removing waste water is adopted;
(2) in the waste water after filtration, add 2,5-hexanedione, stir under the rotating speed of 500 ~ 800r/min;
(3) ultraviolet source irradiation step (2) the gained water body of 5 ~ 15mW/cm2 is adopted.
Volumetric molar concentration containing dyestuff in described waste water is 0.05 ~ 0.5mM, and the pH of water body is 5 ~ 9.
In described step (2), the addition of the relative waste water of 2,5-hexanedione is 0.5 ~ 6mM.
Dyestuff contained in described waste water is tropeolin-D, Congo red, methylene blue or rhodamine B.
The technique effect that the present invention is useful is:
The inventive method utilizes the photoxidation characteristic of diketone compound, carries out desolventing technology to Wastewater Dyes, and in the inventive method, decoloring reaction has autoacceleration performance, and along with the prolongation of light application time, decolorization rate is accelerated; In the system that organism (as alcohol) coexists, the impact that decolorizing efficiency is subject to is less.Therefore, this method can be widely used in dyeing waste water and the process by dyestuff polluted-water.
Embodiment
Below in conjunction with embodiment, the present invention is specifically described.
Embodiment 1
Adopt a method for diketone compound treatment of dyeing and printing, described method comprises the steps:
(1) suspended particulate matter in filter press removing waste water (pH is 9, containing tropeolin-D 0.05mM) is adopted;
(2) in the waste water after filtration, add 2,5-hexanedione (addition of relative waste water is 0.5mM), stir under the rotating speed of 700r/min;
(3) ultraviolet source irradiation step (2) the gained water body of 5mW/cm2 is adopted.
Embodiment 2
Adopt a method for diketone compound treatment of dyeing and printing, described method comprises the steps:
(1) suspended particulate matter in filter press removing waste water (pH is 5, containing Congo red 0.25mM) is adopted;
(2) in the waste water after filtration, add 2,5-hexanedione (addition of relative waste water is 4mM), stir under the rotating speed of 500r/min;
(3) ultraviolet source irradiation step (2) the gained water body of 10mW/cm2 is adopted.
Embodiment 3
Adopt a method for diketone compound treatment of dyeing and printing, described method comprises the steps:
(1) suspended particulate matter in filter press removing waste water (pH is 7, containing rhodamine B 0.5mM) is adopted;
(2) in the waste water after filtration, add 2,5-hexanedione (addition of relative waste water is 6mM), stir under the rotating speed of 800r/min;
(3) ultraviolet source irradiation step (2) the gained water body of 15mW/cm2 is adopted.
Claims (4)
1. adopt a method for diketone compound treatment of dyeing and printing, it is characterized in that described method comprises the steps:
(1) suspended particulate matter in filter press removing waste water is adopted;
(2) in the waste water after filtration, add 2,5-hexanedione, stir under the rotating speed of 500 ~ 800r/min;
(3) ultraviolet source irradiation step (2) the gained water body of 5 ~ 15mW/cm2 is adopted.
2. method according to claim 1, it is characterized in that the volumetric molar concentration containing dyestuff in described waste water is 0.05 ~ 0.5mM, the pH of water body is 5 ~ 9.
3. method according to claim 1, is characterized in that the addition of the relative waste water of 2,5-hexanedione in described step (2) is 0.5 ~ 6mM.
4. method according to claim 1, to is characterized in that in described waste water that contained dyestuff is tropeolin-D, Congo red, methylene blue or rhodamine B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510856787.6A CN105293792A (en) | 2015-11-30 | 2015-11-30 | Method for treating printing and dyeing wastewater by adopting diketone compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510856787.6A CN105293792A (en) | 2015-11-30 | 2015-11-30 | Method for treating printing and dyeing wastewater by adopting diketone compound |
Publications (1)
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| CN105293792A true CN105293792A (en) | 2016-02-03 |
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| CN201510856787.6A Pending CN105293792A (en) | 2015-11-30 | 2015-11-30 | Method for treating printing and dyeing wastewater by adopting diketone compound |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005131450A (en) * | 2003-10-28 | 2005-05-26 | Japan Organo Co Ltd | Method and apparatus for treating wastewater |
| US20120118833A1 (en) * | 2010-11-12 | 2012-05-17 | Korea Institute Of Science And Technology | Method and apparatus for enhanced photocatalytic oxidative decolorization of wastewater containing reactive anthraquinone dye |
| CN102491450A (en) * | 2011-12-15 | 2012-06-13 | 南京大学 | Method for treating dye waste water by using ultraviolet-acetylacetone oxidation treatment process |
| CN102642890A (en) * | 2012-05-09 | 2012-08-22 | 南京大学 | Method utilizing small-molecule diketone to serve as optical active agent for oxidation treatment of dye waste water |
-
2015
- 2015-11-30 CN CN201510856787.6A patent/CN105293792A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005131450A (en) * | 2003-10-28 | 2005-05-26 | Japan Organo Co Ltd | Method and apparatus for treating wastewater |
| US20120118833A1 (en) * | 2010-11-12 | 2012-05-17 | Korea Institute Of Science And Technology | Method and apparatus for enhanced photocatalytic oxidative decolorization of wastewater containing reactive anthraquinone dye |
| CN102491450A (en) * | 2011-12-15 | 2012-06-13 | 南京大学 | Method for treating dye waste water by using ultraviolet-acetylacetone oxidation treatment process |
| CN102642890A (en) * | 2012-05-09 | 2012-08-22 | 南京大学 | Method utilizing small-molecule diketone to serve as optical active agent for oxidation treatment of dye waste water |
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Application publication date: 20160203 |
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