CN101704559A - New method for quickly decolorizing dyes - Google Patents
New method for quickly decolorizing dyes Download PDFInfo
- Publication number
- CN101704559A CN101704559A CN200910185776A CN200910185776A CN101704559A CN 101704559 A CN101704559 A CN 101704559A CN 200910185776 A CN200910185776 A CN 200910185776A CN 200910185776 A CN200910185776 A CN 200910185776A CN 101704559 A CN101704559 A CN 101704559A
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- China
- Prior art keywords
- ammonium
- dyestuff
- nitrate
- ion
- light
- Prior art date
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a new method for quickly decolorizing dyes, which relates to the technical field of environmental pollution control. The method is characterized by comprising the following steps: 1) using a two-ion coexistence system of ammonium ions and nitrate ions; and 2) decolorizing the dyes under the irradiation of ultraviolet light or sunlight. The method has the characteristics of wide source of raw materials, low cost, mild reaction condition, simple post-treatment, convenient operation and the like. Under the irradiation of light, various dyes can be decolorized by the two-ion coexistence system in a short time, and the decolorizing efficiency is high and the decolorizing speed is quick.
Description
Technical field
The present invention relates to a kind of dyestuff novel method of decolouring fast that makes, under the irradiation of UV-light, the double ion coexistence system that ammonium ion and nitrate ion are formed can make all kinds of dyestuffs decolour fast, belongs to the environmental pollution treatment technology field.
Background technology
Dyestuff is widely used in weaving, pigment, leather, printing, food, makeup, photography and clothing factory etc., and dyestuff is bringing convenience to people, in the good life, causing the serious environmental pollution again.According to statistics, in the production process of textile printing and dyeing factory, the dyestuff of nearly 10-15% is discharged as sewage.The poisonous readily biodegradable not again of these sewage, and very strong to the resistibility of physical chemistry treatment process, particularly the color in the waste water from dyestuff is difficult to remove.Compare with other pollutent waste water, as long as there is the dyestuff of trace to have the high-visible and remarkably influenced water quality of color relation in the waste water.Therefore seek and a kind ofly dye colour removes in the waste water effective ways are compared with other colourless organic compound seem even more important.Traditional treatment process has at present: active carbon adsorption, condense-flocculence membrane filter method, ultra-filtration method, electrocoagulation, chemical precipitation method etc.In recent years, various oxidation technologies are as the ozonize katalysis, with H
2O
2Also be applied to the processing of waste water from dyestuff for the oxidation style on basis and photocatalysis etc.Yet these method decolourings are all undesirable, and easily cause secondary pollution.Recently, we find that under the irradiation of UV-light, the double ion coexistence system that ammonium ion and nitrate ion are formed has very strong decoloring ability to various dyestuffs.Azoic dyestuff is as tropeolin-D, Congo red, Acid Red G, orange G etc.; The quinones dyestuff, as methylene blue, rhodamine B, eosin B, the red G of pyrrole hello, magenta, victoria blue B, xylene cyanol blue FF etc. in the following short period of time of irradiation of UV-light, can both be decoloured and effect obvious.The present invention is a kind of method of very promising dye wastewater treatment using, also will provide a new visual field for dye decolored.The present invention simultaneously also might be synthetic new compound cut-through in the organic synthesis field.
The present invention is under the irradiation of UV-light (sunlight), utilizes the double ion coexistence system of being made up of ammonium ion and nitrate ion that dyestuff is decoloured.The result shows that various dyestuffs all have good decolorizing effect at short notice.The present invention has that raw material is wide, cost is low, reaction conditions is gentle, aftertreatment is simple and characteristics such as easy to operate.
Summary of the invention
Under the irradiation of UV-light, the double ion coexistence system of utilizing ammonium ion and nitrate ion to form is directly decoloured to dyestuff, and decolorizing effect is fine.The double ion coexisting body that ammonium ion and nitrate ion are formed ties up in the reaction on the one hand as reactant, play a part simultaneously photocatalyst on the other hand, the present invention has that raw material is wide, cost is low, reaction conditions is gentle, aftertreatment is simple and characteristics such as easy to operate.
Purpose of the present invention can realize by following measure: as reactant, the mol ratio that adds ammonium ion and nitrate ion is 1: 1 ammonium salt and a nitrate, shines under UV-light then, makes dye decolored with water-soluble dyestuff.The concentration of ammonium ion and nitrate ion should be in the 0-8g/L scope.Measure solution absorbancy (A before illumination respectively with spectrophotometer
0) and illumination after absorbancy (A), thereby can calculate the percent of decolourization η=(A of dyestuff
0-A)/A
0* 100%, judge the decolorizing effect of this system according to the size of percent of decolourization to dyestuff.The present invention has that raw material is wide, cost is low, reaction conditions is gentle, aftertreatment is simple and characteristics such as easy to operate.Dye decolored process is as follows:
Under the irradiation of UV-light, produce hydrated electron e
Aq -, process is as follows:
NO
3 -+hv→NO
3 *- (1)
NO
3 *-→NO
3 *+e
aq - (2)
The percent of decolourization of dyestuff is higher, with hydrated electron substantial connection is arranged.Hydrated electron and azoic dyestuff such as tropeolin-D or quinones dyestuff such as methylene blue react, and cause chromophoric group to be broken rapidly.Chromophoric group in hydrated electron and the azoic dyestuff (N=N-) very fast new free radical anion, the rapid then protonated generation hydrazyl free radical of generating earlier of reaction.
-N＝N-+e
aq -→-N-N
-- (3)
-N-N
--+H
2O→-N
*-NH-+OH
-(4)
Simultaneously, because the ammonium ion hydrolysis makes ammonium nitrate solution be acid.Under acidic conditions, hydrated electron and hydrogen ion react rapidly, generate hydroperoxyl radical, and hydroperoxyl radical and hydrazyl free radical then react again.
NH
4 ++2H
2O→NH
4OH+H
3O
+(5)
e
aq -+H
3O
+→H
*+H
2O (6)
-N
*-NH-+H
*→-NH-NH- (7)
The photochemical catalysis decoloring reaction of quinones dyestuff such as methylene blue and top reaction formula (3), (4) are similar with (7)
Test-results shows that nitrate ion and ammonium ion almost do not change before and after reaction, this is that reaction equation is as follows because nitrate ion and ammonium ion can transform in reaction mutually:
NO
3 -+10H
++8e
aq -→NH
4 ++3H
2O (10)
NH
4 ++2NO
3 *→3NO
2 *+3H
*+H
+ (11)
NO
2 *+OH
-→NO
3 -+H
* (12)
Embodiment
Embodiment one: with azoic dyestuff tropeolin-D is example.The photochemical catalysis decolorization experiment all carries out in photo catalysis reactor.Photo catalysis reactor is made up of two parts, and first part is a ring-like quartz glass sleeve, keeps flat a 375W medium pressure mercury lamp (characteristic wavelength is 365nm) in the middle empty tube as ultraviolet source or keep flat a 500W xenon lamp as the simulated solar radiant.Quartz glass sleeve internal layer chuck is connected with recirculated cooling water, and the may command reacting liquid temperature is about 30 ℃; Second section is that the diameter of an opening is the beaker of 12cm, adds a certain amount of reaction solution and catalyzer in reaction beginning forward direction beaker, and the stirring that does not stop with magneton.In the reaction process, keeping the lamp source is 11cm to the height of reaction liquid level, and the reaction liquid level records the UV light intensity and is about 18300 μ W/cm
2In the experimentation, the initial pH value of reaction solution is 6.0, and the starting point concentration of tropeolin-D is 9.5mg/L, and the consumption of ammonium nitrate is 8.0g/L.Experimental result shows that light application time is 2h, and the percent of decolourization of tropeolin-D is 90.8%.
Embodiment two: press above-mentioned with quadrat method catalysis decolouring quinones dyestuff such as methylene blue.In the experimentation, the initial pH value of reaction solution is 6.0, and the starting point concentration of tropeolin-D is 2.4mg/L, and the consumption of ammonium nitrate is 8.0g/L.Experimental result shows that light application time is 2h, and the percent of decolourization of methylene blue is 97.5%.
Claims (6)
1. one kind makes the dyestuff novel method of decolouring fast, it is characterized in that realizing by following step: the 1) double ion of ammonium ion and nitrate ion coexistence system, 2) even dye decolored under UV-light or irradiation of sunlight.
2. as the double ion coexistence system of claims 1 described ammonium ion and nitrate ion, comprise by all water-soluble ammonium salts, as ammonium chloride, brometo de amonio, ammonium sulfate, volatile salt, ammonium acetate, ammonium molybdate, ferric ammonium sulfate etc.; And nitrate, the coexistence system as SODIUMNITRATE, saltpetre, magnesium nitrate, nitrocalcite, aluminum nitrate, zinc nitrate, iron nitrate etc. are formed mutually also comprises the solution that the ammonium nitrate compound is water-soluble.
3. as claims 1 described dyestuff, comprise all dyestuffs, as azoic dyestuff and quinones dyestuff etc.
4. comprise wavelength all UV-light as claims 1 described UV-light less than 400nm.
5. as claims 1 described a kind of dyestuff novel method of decolouring fast that makes, add solid adsorbent,, help the carrying out that reacts as silica gel, gac, polymeric adsorbent, clay, diatomite, molecular sieve, activated alumina etc.
6. as claims 1 described a kind of dyestuff novel method of decolouring fast that makes, add ammonium sulphite, S-WAT, reductive agents such as Sulfothiorine help the carrying out that reacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101857764A CN101704559B (en) | 2009-12-02 | 2009-12-02 | New method for quickly decolorizing dyes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101857764A CN101704559B (en) | 2009-12-02 | 2009-12-02 | New method for quickly decolorizing dyes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101704559A true CN101704559A (en) | 2010-05-12 |
| CN101704559B CN101704559B (en) | 2011-10-12 |
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ID=42374830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101857764A Expired - Fee Related CN101704559B (en) | 2009-12-02 | 2009-12-02 | New method for quickly decolorizing dyes |
Country Status (1)
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|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630507A (en) * | 2013-11-19 | 2014-03-12 | 武汉纺织大学 | Method for measuring decolourization ratio of colored substance in solution |
| CN105174583A (en) * | 2015-09-17 | 2015-12-23 | 浙江奇彩环境科技有限公司 | Recycling treatment method of dilute alkali wastewater |
| CN108017113A (en) * | 2017-12-15 | 2018-05-11 | 蚌埠学院 | A kind of method for making dyestuff fast degradation decolourize using photocatalysis technology |
| CN108033512A (en) * | 2017-12-15 | 2018-05-15 | 蚌埠学院 | A kind of discoloration method of dyestuff |
| CN108147495A (en) * | 2017-12-15 | 2018-06-12 | 蚌埠学院 | A kind of method for dyestuff degradation being made to fade using nitrate ion |
| CN111875128A (en) * | 2020-07-16 | 2020-11-03 | 南京汉旗新材料股份有限公司 | Decolorizing treatment method for dye polaroid waste liquid |
| CN112897780A (en) * | 2021-03-08 | 2021-06-04 | 沈阳大学 | Method for advanced reductive degradation of azo dye by using ultraviolet/semi-dry desulfurized fly ash |
-
2009
- 2009-12-02 CN CN2009101857764A patent/CN101704559B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630507A (en) * | 2013-11-19 | 2014-03-12 | 武汉纺织大学 | Method for measuring decolourization ratio of colored substance in solution |
| CN105174583A (en) * | 2015-09-17 | 2015-12-23 | 浙江奇彩环境科技有限公司 | Recycling treatment method of dilute alkali wastewater |
| CN108017113A (en) * | 2017-12-15 | 2018-05-11 | 蚌埠学院 | A kind of method for making dyestuff fast degradation decolourize using photocatalysis technology |
| CN108033512A (en) * | 2017-12-15 | 2018-05-15 | 蚌埠学院 | A kind of discoloration method of dyestuff |
| CN108147495A (en) * | 2017-12-15 | 2018-06-12 | 蚌埠学院 | A kind of method for dyestuff degradation being made to fade using nitrate ion |
| CN111875128A (en) * | 2020-07-16 | 2020-11-03 | 南京汉旗新材料股份有限公司 | Decolorizing treatment method for dye polaroid waste liquid |
| CN112897780A (en) * | 2021-03-08 | 2021-06-04 | 沈阳大学 | Method for advanced reductive degradation of azo dye by using ultraviolet/semi-dry desulfurized fly ash |
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| Publication number | Publication date |
|---|---|
| CN101704559B (en) | 2011-10-12 |
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Granted publication date: 20111012 Termination date: 20121202 |