CN102627371B - Method for ultraviolet-assisted Fenton-like oxidation and degradation of methanol wastewater with low concentration - Google Patents
Method for ultraviolet-assisted Fenton-like oxidation and degradation of methanol wastewater with low concentration Download PDFInfo
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- CN102627371B CN102627371B CN201210108474.9A CN201210108474A CN102627371B CN 102627371 B CN102627371 B CN 102627371B CN 201210108474 A CN201210108474 A CN 201210108474A CN 102627371 B CN102627371 B CN 102627371B
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- methanol
- methyl alcohol
- ultraviolet
- low concentration
- fenton
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Abstract
The invention relates to a method for ultraviolet-assisted Fenton-like oxidation and degradation of methanol wastewater with low concentration. The method for ultraviolet-assisted Fenton-like oxidation and degradation of the methanol wastewater with low concentration comprises the following steps of: adjusting pH value of the methanol wastewater with the concentration of lower than 100 mg/L by sulfuric acid so that the pH value of the methanol wastewater is 3-6, continuously feeding FeSO4.7H2O and Na2C4H4O6.2H2O into the methanol wastewater, stirring to be dissolved, adding H2O2 with the mass percentage concentration of 30%, wherein the molar ratio of H2O2 to CH3OH is [H2O2]: [CH3OH]=1-6, and the molar ratio of H2O2 to FeSO4.7H2O to Na2C4H4O6.2H2O in the Fenton-like is [H2O2]: [Fe<2+>]: [C4H4O6<2->]=10: 1: 1, oxidizing and degrading the methanol for 10-60 minutes under the ultraviolet irradiation, and after reaction is completed, carrying out static settlement for liquid-solid separation. The method, provided by the invention, can be suitable for treating the methanol wastewater with low concentration, and has the advantages of short reaction time and complete oxidation, and the removal rate of the methanol can reach 100%.
Description
One, technical field:
What the present invention relates to is the method for processing trade effluent, and what be specifically related to is the method for ultraviolet-aided class-Fenton oxidative degradation wastewater containing methyl alcohol in low concentration.
Two, background technology:
Along with increasing sharply of methanol production amount, the wastewater containing methanol producing in production process also sharply increases, water pollutes and is on the rise, each manufacturing enterprise has taked certain pollution processing and prophylactico-therapeutic measures to high concentration methanol waste water, but the processing of wastewater containing methyl alcohol in low concentration is not also caused to enough attention.Because the content of methyl alcohol in wastewater containing methyl alcohol in low concentration is low, in addition the volatility of methyl alcohol own is high, wetting ability is strong, polarity is large, adopt the methods such as traditional rectifying or extraction to process, facility investment is large, cost is high, efficiency is low, be difficult to be accepted by most enterprises, cause wastewater containing methyl alcohol in low concentration to pollute and be on the rise.
Three, summary of the invention:
The object of this invention is to provide the method for ultraviolet-aided class-Fenton oxidative degradation wastewater containing methyl alcohol in low concentration, it carries out wastewater containing methyl alcohol in low concentration processing for solving methods such as adopting traditional rectifying or extraction, and facility investment is large, cost is high, inefficient problem.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method of ultraviolet-aided class-Fenton oxidative degradation wastewater containing methyl alcohol in low concentration, in methanol waste water to concentration lower than 100mg/L, use sulphur acid for adjusting pH value, making the pH value of methanol waste water is 3-6, then continues to drop into FeSO in methanol waste water
47H
2o and Na
2c
4h
4o
62H
2o, is stirred to that to add mass percent concentration after dissolving be 30% H
2o
2, H
2o
2with CH
3mol ratio between OH is [H
2o
2]: [CH
3oH]=1-6, H in Fenton-like
2o
2, FeSO
47H
2o, Na
2c
4h
4o
62H
2mol ratio between O is [H
2o
2]: [Fe
2+]: [C
4h
4o
6 2-]=10:1:1, oxidative degradation methyl alcohol 10-60 minute under UV-irradiation, staticly settles and carries out liquid-solid separation after reaction finishes.
In such scheme, get the methanol waste water of 200mL 50mg/L, pH value of solution is adjusted to 4.0 with dilute sulphuric acid, adds 0.1mL H in system
2o
2, 28mgFeSO
47H
2o and 23mg Na
2c
4h
4o
62H
2o carries out light and helps class-Fenton oxidative degradation methyl alcohol 10 minutes under UV-irradiation.
In such scheme, get the methanol waste water of 200mL 100mg/L, pH value of solution is adjusted to 4.0 with dilute sulphuric acid, adds 0.3mL H in system
2o
2, 83mgFeSO
47H
2o and 69mg Na
2c
4h
4o
62H
2o carries out light and helps class-Fenton oxidative degradation methyl alcohol 30 minutes under UV-irradiation.
In such scheme, sulfuric acid is dilute sulphuric acid, the pH value of methanol waste water is regulated with dilute sulphuric acid.
A processing difficult problem that the present invention is directed to wastewater containing methyl alcohol in low concentration has proposed a kind of effective oxidation degradation method, and it is both efficient that the method is processed methanol waste water, non-secondary pollution again.Utilize the water treatment method of ultraviolet-aided class-Fenton technology, can effectively improve the oxidation capacity of Fenton reagent, the methyl alcohol in efficient degrading waste water fast, even permineralization.Reaction equation is as follows:
CH
3OH?+?HO·?→?HCHO
HCHO?+?HO·?→?HCOOH
HCOOH?+?HO·?→?……?→CO
2?+H
2O
Beneficial effect:
(1) the present invention is applicable to the processing of wastewater containing methyl alcohol in low concentration, and the reaction times is short, and thoroughly, methyl alcohol clearance can reach 100% in oxidation.
(2) the present invention is in oxidising process, Fe(II) become Fe(III), there is flocculating function, and without any toxic side effect, can not produce secondary pollution to water body.
(3) the present invention is UV-light and class-Fenton coupling, made up the short and halfway deficiency of oxidative degradation methyl alcohol of UV-light/Fenton technology oxygenizement time, reaches further raising and remove the object of methyl alcohol effect.
Four, embodiment:
Embodiment 1:
Get the methanol waste water of 200mL 50mg/L, pH value of solution is adjusted to 4.0 with dilute sulphuric acid, adds 0.1mL H in system
2o
2, 28mgFeSO
47H
2o and 23mg Na
2c
4h
4o
62H
2o carries out light and helps class-Fenton oxidative degradation methyl alcohol 10 minutes under UV-irradiation, and methyl alcohol clearance reaches 100%.
Comparative example 1:
Get the methanol waste water of 200mL 50mg/L, pH value of solution is adjusted to 4.0 with dilute sulphuric acid, adds 0.3mL H in system
2o
2, react 60 minutes methyl alcohol clearances and reach 64%.
Comparative example 2:
Get the methanol waste water of 200mL 50mg/L, pH value of solution is adjusted to 4.0 with dilute sulphuric acid, adds 0.3mL H in system
2o
2with 28mg FeSO
47H
2o, reacts 60 minutes methyl alcohol clearances and reaches 81%.
Embodiment 2
Get the methanol waste water of 200mL 100mg/L, pH value of solution is adjusted to 4.0 with dilute sulphuric acid, adds 0.3mL H in system
2o
2, 83mgFeSO
47H
2o and 69mg Na
2c
4h
4o
62H
2o carries out light and helps class-Fenton oxidative degradation methyl alcohol 30 minutes under UV-irradiation, and methyl alcohol clearance reaches 100%.
Claims (2)
1. the method for ultraviolet-aided class-Fenton oxidative degradation wastewater containing methyl alcohol in low concentration, it is characterized in that: the method for this ultraviolet-aided class-Fenton oxidative degradation wastewater containing methyl alcohol in low concentration: to concentration, be with sulphur acid for adjusting pH value, to be 4 in the methanol waste water of 50mg/L or 100mg/L, then continue to drop into FeSO in methanol waste water
47H
2o and Na
2c
4h
4o
62H
2o, is stirred to that to add mass percent concentration after dissolving be 30% H
2o
2, H
2o
2with CH
3mol ratio between OH is [H
2o
2]: [CH
3oH]=1-6, the methanol waste water 200mL that is 50mg/L to concentration, adds 0.1mL H
2o
2, 28mgFeSO
47H
2o and 23mg Na
2c
4h
4o
62H
2o carries out light and helps class-Fenton oxidative degradation methyl alcohol 10 minutes under UV-irradiation, after reaction finishes, staticly settles and carries out liquid-solid separation; Or the methanol waste water 200mL that is 100mg/L to concentration, add 0.3mL H
2o
2, 83mgFeSO
47H
2o and 69mg Na
2c
4h
4o
62H
2o carries out light and helps class-Fenton oxidative degradation methyl alcohol 30 minutes under UV-irradiation, after reaction finishes, staticly settles and carries out liquid-solid separation.
2. the method for ultraviolet-aided class-Fenton oxidative degradation wastewater containing methyl alcohol in low concentration according to claim 1, is characterized in that: described sulfuric acid is dilute sulphuric acid, the pH value of methanol waste water is regulated with dilute sulphuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210108474.9A CN102627371B (en) | 2012-04-14 | 2012-04-14 | Method for ultraviolet-assisted Fenton-like oxidation and degradation of methanol wastewater with low concentration |
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|---|---|---|---|
| CN201210108474.9A CN102627371B (en) | 2012-04-14 | 2012-04-14 | Method for ultraviolet-assisted Fenton-like oxidation and degradation of methanol wastewater with low concentration |
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| Publication Number | Publication Date |
|---|---|
| CN102627371A CN102627371A (en) | 2012-08-08 |
| CN102627371B true CN102627371B (en) | 2014-04-16 |
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| CN105540962A (en) * | 2015-12-14 | 2016-05-04 | 山东凯盛新材料有限公司 | Treatment method of 1-(2-chloroethoxy)propane-containing waste water |
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| CN1030983C (en) * | 1990-10-05 | 1996-02-14 | 吉林大学 | Treating phenolic aldehyde bearing waste water by photocatalysis |
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| ITSA20070020A1 (en) * | 2007-05-24 | 2008-11-25 | Uiversita Degli Studi Di Saler | HIGH EFFICIENCY PHOTO-FENTON HETEROGENEOUS PROCESS FOR DEGRADATION OF ORGANIC POLLUTANTS. |
| CN102198989A (en) * | 2011-04-22 | 2011-09-28 | 安徽国星生物化学有限公司 | Method for treating PMIDA wastewater |
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