CN112897781A - Method for degrading azo dye by synergy of ultrasonic-ultraviolet-semidry desulfurization ash - Google Patents
Method for degrading azo dye by synergy of ultrasonic-ultraviolet-semidry desulfurization ash Download PDFInfo
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- CN112897781A CN112897781A CN202110248726.7A CN202110248726A CN112897781A CN 112897781 A CN112897781 A CN 112897781A CN 202110248726 A CN202110248726 A CN 202110248726A CN 112897781 A CN112897781 A CN 112897781A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 33
- 230000023556 desulfurization Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000987 azo dye Substances 0.000 title claims abstract description 19
- 230000000593 degrading effect Effects 0.000 title claims abstract description 10
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- 239000002699 waste material Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 230000002195 synergetic effect Effects 0.000 claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003546 flue gas Substances 0.000 claims abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 7
- 239000011575 calcium Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 3
- 238000007873 sieving Methods 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 claims 3
- 238000006731 degradation reaction Methods 0.000 claims 3
- 239000002956 ash Substances 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 11
- 239000010881 fly ash Substances 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract 1
- 238000002604 ultrasonography Methods 0.000 abstract 1
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 4
- 229940012189 methyl orange Drugs 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 210000004884 grey matter Anatomy 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention belongs to the technical field of solid waste resource utilization and advanced reduction treatment of wastewater, and particularly relates to a method for degrading azo dyes by using ultrasonic-ultraviolet-semidry desulfurized fly ash in a synergistic manner. And degrading and removing azo dyes in the wastewater by using strong reducing free radicals generated by a high-grade reducing system consisting of ultrasonic-ultraviolet-desulfurized fly ash under the synergistic action of ultrasonic and ultraviolet light. The method mainly comprises the following steps: (1) grinding wastes (desulfurized ash) generated by a semi-dry calcium flue gas desulfurization system which operates stably through a sieve, and bagging the sieved powder for later use; (2) placing a certain amount of azo dye wastewater into a reaction tank, adding a certain amount of pretreated desulfurization ash, adjusting the reaction pH of the solution, and treating the wastewater under the irradiation conditions of ultrasound and an ultraviolet lamp; (3) adjusting the treated wastewater to be neutral, standing for a period of time, and filtering out water. The process realizes high value-added resource utilization of the waste while performing harmless treatment on the waste water and the waste, achieves the aim of treating the waste by the waste, and has remarkable economic benefit, social benefit and environmental benefit.
Description
Technical Field
The invention belongs to the technical field of solid waste resource utilization and advanced reduction treatment of wastewater, and particularly relates to a method for degrading azo dyes by using ultrasonic-ultraviolet-semidry desulfurized fly ash in a synergistic manner.
Background
The semi-dry flue gas desulfurization technology is a flue gas desulfurization technology with the advantages of a wet method and a dry method, compared with the wet method, the method has the advantages of high desulfurization efficiency, simple process system, low capital cost and small occupied area, and the desulfurization product is similar to the dry method and is dry powder without wastewater. However, the desulfurization product components are complex and variable (the main components are calcium sulfite, calcium carbonate, calcium hydroxide, a small amount of calcium sulfate and the like), are strong in basicity and are easy to decompose, so that the comprehensive utilization is very difficult. Therefore, it is very important to find a low-cost desulfurization ash treatment method or resource utilization mode.
Disclosure of Invention
The invention provides a method for degrading azo dyes by using ultrasonic-ultraviolet-semidry desulfurized fly ash in a synergistic manner, which takes semidry desulfurized fly ash as a reducing agent, utilizes strong reducing free radicals generated by a high-grade reduction system consisting of the ultrasonic-ultraviolet-desulfurized fly ash under the synergistic action of ultrasonic and ultraviolet light to degrade and remove the azo dyes in wastewater, realizes the high value-added resource utilization of wastes while performing harmless treatment on the wastewater and the wastes, achieves the aim of treating the wastes with the wastes, and has remarkable economic benefit, social benefit and environmental benefit.
1. A method for degrading azo dyes by synergy of ultrasonic-ultraviolet-semidry desulfurization ash is characterized by comprising the following steps:
(1) grinding waste (desulfurized ash) generated by a semi-dry calcium flue gas desulfurization system which operates stably, sieving the ground waste with a 80-mesh sieve, and bagging the sieved powder for later use;
(2) and (3) putting a certain amount of azo dye wastewater into a reaction tank, adding a certain amount of pretreated desulfurization ash, and adjusting the reaction pH = 2.5-7.0. Reacting for 0.5-4.0 h under the irradiation of ultrasonic waves with the frequency of 40-100 kHz and an ultraviolet lamp with the power of 20-80W;
(3) adjusting the pH of the treated wastewater to be 6.0-7.0, standing for a period of time, and filtering out water.
The semi-dry desulfurized fly ash belongs to waste generated by flue gas desulfurization by a semi-dry calcium method.
The added desulfurization gray matter amount in the reaction tank is about 20-100 times of the amount of azo dye pollutants in the wastewater, and the reaction pH = 2.5-7.0.
The reaction needs to be carried out for 0.5 to 4.0 hours under the irradiation condition of ultrasonic waves with the frequency of 40 to 100kHz and an ultraviolet lamp with the power of 20 to 80W.
Compared with the prior art, the invention has the characteristics and beneficial effects that:
the invention realizes the high value-added resource utilization of the waste while performing harmless treatment on the waste water and the waste, achieves the aim of treating the waste by the waste, and has obvious economic benefit, social benefit and environmental benefit.
Drawings
FIG. 1 is a photograph of semi-dry desulfurized fly ash used in the examples of the invention.
FIG. 2 is an XRD pattern of semi-dry desulfurized fly ash used in the examples of the invention.
Detailed Description
The method and technique of the present invention are described below by way of example, but not limitation in practical applications.
Example 1
The method for degrading azo dye by using the desulfurization ash obtained by the ultrasonic-ultraviolet-semidry method in a synergistic manner comprises the following steps:
(1) grinding desulfurization ash generated by a semi-dry calcium flue gas desulfurization system which operates stably, sieving the ground desulfurization ash with a 80-mesh sieve, and bagging the sieved powder for later use;
(2) and (3) taking 150 mL of methyl orange wastewater with the concentration of 100 mg/L into a reaction tank, adding 0.8 g of pretreated desulfurization ash, and adjusting the reaction pH of the solution to be = 2.5. Reacting for 3.0 h under the conditions of 80kHz ultrasonic and 60W ultraviolet lamp irradiation;
(3) the treated wastewater was adjusted to pH =7.0 and after standing for a period of time, the water was filtered off.
The methyl orange removal rate of the treated wastewater can reach over 90 percent through measurement.
Example 2
The method for degrading azo dye by using the desulfurization ash obtained by the ultrasonic-ultraviolet-semidry method in a synergistic manner comprises the following steps:
(1) grinding desulfurization ash generated by a semi-dry calcium flue gas desulfurization system which operates stably, sieving the ground desulfurization ash with a 80-mesh sieve, and bagging the sieved powder for later use;
(2) and (3) putting 200 mL of methyl orange wastewater with the concentration of 200 mg/L into a reaction tank, adding 2.5g of pretreated desulfurization ash, and adjusting the reaction pH of the solution to be = 3.0. Reacting for 3.0 h under the conditions of 100kHz ultrasonic and 60W ultraviolet lamp irradiation;
(3) the treated wastewater was adjusted to pH =7.0 and after standing for a period of time, the water was filtered off.
The methyl orange removal rate of the treated wastewater can reach over 90 percent through measurement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (4)
1. A method for degrading azo dyes by synergy of ultrasonic-ultraviolet-semidry desulfurization ash is characterized by comprising the following steps:
(1) grinding waste (desulfurized ash) generated by a semi-dry calcium flue gas desulfurization system which operates stably, sieving the ground waste with a 80-mesh sieve, and bagging the sieved powder for later use;
(2) placing a certain amount of azo dye wastewater into a reaction tank, adding a certain amount of pretreated desulfurization ash, adjusting the reaction pH to be 2.5-7.0, and reacting for 0.5-4.0 h under the conditions of ultrasonic with the frequency of 40-100 kHz and irradiation of a 20-80W ultraviolet lamp;
(3) adjusting the pH of the treated wastewater to be 6.0-7.0, standing for a period of time, and filtering out water.
2. The method for the synergistic degradation of azo dyes by using the ultrasonic-ultraviolet-semi-dry desulfurization ash as claimed in claim 1, wherein the semi-dry desulfurization ash belongs to waste generated by flue gas desulfurization by a semi-dry calcium method.
3. The method for the synergistic degradation of azo dyes by desulfurization ash through ultrasonic-ultraviolet-semidry process according to claim 1, characterized in that the amount of desulfurization ash added in the reaction tank is about 20-100 times of the amount of azo dye pollutants in wastewater, and the reaction pH =2.5-7.0 is controlled.
4. The method for the synergistic degradation of azo dyes from desulfurized ash by ultrasonic-ultraviolet-semidry process according to claim 1, wherein the reaction is carried out under the irradiation of ultrasonic waves with frequency of 40-100 kHz and ultraviolet lamps with power of 20W-80W for 0.5-4.0 h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110248726.7A CN112897781A (en) | 2021-03-08 | 2021-03-08 | Method for degrading azo dye by synergy of ultrasonic-ultraviolet-semidry desulfurization ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110248726.7A CN112897781A (en) | 2021-03-08 | 2021-03-08 | Method for degrading azo dye by synergy of ultrasonic-ultraviolet-semidry desulfurization ash |
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| CN112897781A true CN112897781A (en) | 2021-06-04 |
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| CN202110248726.7A Pending CN112897781A (en) | 2021-03-08 | 2021-03-08 | Method for degrading azo dye by synergy of ultrasonic-ultraviolet-semidry desulfurization ash |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030082101A1 (en) * | 2001-06-11 | 2003-05-01 | Cavalier Discovery | Accelerators for increasing the rate of formation of free radicals and reactive oxygen species |
| US20170217803A1 (en) * | 2011-11-07 | 2017-08-03 | Marcus George Theodore | Redox water treatment method |
| CN107720925A (en) * | 2017-09-14 | 2018-02-23 | 安徽工程大学 | Utilize the method for sodium sulfite activation persulfate degraded methyl orange azo dye wastewater |
| CN108658165A (en) * | 2018-06-15 | 2018-10-16 | 蚌埠学院 | A method of utilizing photocatalysis technology degradation high concentration dyestuff |
| CN112110562A (en) * | 2020-07-29 | 2020-12-22 | 中冶南方都市环保工程技术股份有限公司 | Method for treating cold-rolling chromium-containing wastewater by using semi-dry desulfurized fly ash in steel mill |
-
2021
- 2021-03-08 CN CN202110248726.7A patent/CN112897781A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030082101A1 (en) * | 2001-06-11 | 2003-05-01 | Cavalier Discovery | Accelerators for increasing the rate of formation of free radicals and reactive oxygen species |
| US20170217803A1 (en) * | 2011-11-07 | 2017-08-03 | Marcus George Theodore | Redox water treatment method |
| CN107720925A (en) * | 2017-09-14 | 2018-02-23 | 安徽工程大学 | Utilize the method for sodium sulfite activation persulfate degraded methyl orange azo dye wastewater |
| CN108658165A (en) * | 2018-06-15 | 2018-10-16 | 蚌埠学院 | A method of utilizing photocatalysis technology degradation high concentration dyestuff |
| CN112110562A (en) * | 2020-07-29 | 2020-12-22 | 中冶南方都市环保工程技术股份有限公司 | Method for treating cold-rolling chromium-containing wastewater by using semi-dry desulfurized fly ash in steel mill |
Non-Patent Citations (4)
| Title |
|---|
| 杨世迎等: "高级还原技术:一种水处理新技术", 《化学进展》 * |
| 程爱华等: "高级还原技术处理偶氮染料废水的研究", 《现代化工》 * |
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