CN102583690A - Method for processing nitrobenzene organic pollutants in wastewater - Google Patents
Method for processing nitrobenzene organic pollutants in wastewater Download PDFInfo
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- CN102583690A CN102583690A CN2012100535731A CN201210053573A CN102583690A CN 102583690 A CN102583690 A CN 102583690A CN 2012100535731 A CN2012100535731 A CN 2012100535731A CN 201210053573 A CN201210053573 A CN 201210053573A CN 102583690 A CN102583690 A CN 102583690A
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- nitrobenzene
- sodium persulfate
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Abstract
The invention relates to a method for processing nitrobenzene compounds in wastewater. The method concretely comprises the following steps: adding a reductive zero-valent metal and an oxidizer persulfate in proportion under normal-temperature normal-pressure reaction conditions, stirring to degrade nitrobenzene organic pollutants in the wastewater, and discharging after the detection standard reaching. The method has the advantages of normal-temperature normal-pressure carrying-out, mild reaction condition, simple operation, good processing effect, and realization of the combination of the reduction of the zero-valent metal and a high-grade oxidation technology to process the nitrobenzene organic matters which are difficult to oxidize in the wastewater.
Description
Technical field
The invention belongs to technical field of sewage; Be specifically related to the treatment process of nitrobenzene organic pollutant in a kind of waste water, the method for nitrobenzene compounds in the waste water is handled in specifically a kind of utilization " zero-valent metal reduction " associating " persulfate oxidation ".
Background technology
Nitrobenzene compounds is a high toxic material, is difficult to biological degradation, and biochemical reaction is had inhibition and toxic action.EPA is listed oil of mirbane, o-dinitrobenzene, Meta-dinitrobenzene, m-nitrochlorobenzene compounds among 129 kinds of priority pollutants in.
Nitrobenzene compounds is widely used in producing agricultural chemicals, fuel, explosive, medicine, polymer and other Chemicals.Along with the manufacturing and the use of these products, nitro aromatic compound also multipath ground gets in the environment polluted-water.Nitrobenzene compounds phenyl ring electronic cloud is intensive, is difficult to provide electronics, and the oxidation removal nitrobenzene compounds is difficulty relatively.Simultaneously, along with the fast development of industry such as weaving, printing and dyeing, explosive, process hides, the industrial water requirement of nitrobenzene compounds sharply increases.Therefore, the processing of p-nitrophenyl pollutant has very high practical value.
Summary of the invention
The treatment process that the purpose of this invention is to provide nitrobenzene organic pollutant in a kind of waste water, promptly a kind of reaction conditions is gentle, the method for the senior reduction-oxidation integrated process treatment of Nitrobenzene class organic pollutant that processing efficiency is high.
Method of the present invention is characterized in that, is in the waste water that contains the nitrobenzene organic pollutant, to add zero-valent metal simultaneously or sequentially and persulphate is handled nitrobenzene organic pollutant in the waste water.
Described zero-valent metal is the reductibility iron powder, and described persulphate is one or more in Sodium persulfate, Potassium Persulfate, the ammonium peroxydisulfate.
Method of the present invention, when the pH value of handling the waste water initial environment was 3～4, the implementation result of treatment process was best.
When the dosage of persulphate is the 1.5xN multiple of the nitrobenzene organic contamination substrate concentration in the waste water; And the mol ratio of Zero-valent Iron and persulphate is 1/10～1/50 o'clock; Can guarantee the efficient removal of p-nitrophenyl class organic pollutant, and the pharmaceutical quantities of using is minimum.Wherein Zero-valent Iron (being the reductibility iron powder)/persulphate mol ratio is 1/12～1/15 can guarantee the optimum handling effect.
Advantage of the present invention is to carry out under the normal temperature and pressure, and reaction conditions is gentle; Simple to operate; Treatment effect is good, handles the nitrobenzene organism that is difficult for oxidation in the waste water in conjunction with the reduction of zero-valent metal and the advantage of high-level oxidation technology.
Embodiment:
Method of the present invention is to utilize zero-valent metal reduction nitrobenzene organic pollutant to generate transition metal ion and toxicity is lower, the phenyl amines organism that is easy to oxidation removal.And zero-valent metal and transition metal ion all are the catalyzer of persulphate, and the two all can activate the SO that persulphate produces strong oxidizing property
4 -Thereby, degradation of organic substances.On the basis of zero-valent metal reduction nitrobenzene compounds, in reaction system, add the SO that persulphate produces strong oxidizing property
4 -Further remove reduzate phenyl amines organism; Thereby effectively the two combines with the zero-valent metal reduction of nitrobenzene organic pollutant and zero-valent metal and transition metal ion catalysis persulphate high-level oxidation technology, has obtained unexpected treatment effect.
Concrete operations are in the initial pH on wastewater value that guarantees to contain the nitrobenzene organic pollutant is 3～4 scope; Add zero-valent metal and persulphate simultaneously or sequentially and handle nitrobenzene organic pollutant in the waste water; Wherein to be that the 1.5xN multiple of the nitrobenzene organic contamination substrate concentration in the waste water is elected as suitable for the addition of persulphate, is 1/10～1/15 to add zero-valent metal and persulphate according to Zero-valent Iron/persulphate mol ratio.And stir, stirring can be adopted aeration agitation or mechanical stirring.When waste water qualified discharge after detecting is accomplished processing.
Embodiment 1:
With the Zero-valent Iron is the model reductive agent, and Sodium persulfate is the reduction of model oxygenant check zero-valent metal, the treatment effect of persulfate oxidation treatment of Nitrobenzene class organic pollutant.
Specific as follows: as to get certain knitting printing and dyeing mill and discharge waste water water sample 500mL, be about 200mg/L through detecting nitro phenenyl concentration.Regulate the original ph of water sample, making it satisfy pH is 3～4,8～9,10～11.Add Zero-valent Iron/Sodium Persulfate mole=1/10, the quality that adds Sodium persulfate is 5mg.Add Zero-valent Iron and peroxy-disulfuric acid sodium reagent simultaneously, at 0.25h, 0.5h, 1h, 2h, 3h, the concentration of aniline and oil of mirbane in the detection water sample of taking a sample during 5h.
Experimental result:
The treatment effect of table 1. Zero-valent Iron and Sodium persulfate combined degradation intermediate product aniline.
The result shows the oil of mirbane in the Zero-valent Iron reduction water sample, obtains intermediate product aniline, reacts after 0.5 hour, and the DeR of aniline occupies advantage, and aniline is further removed by Zero-valent Iron and the degraded of ferrous ion activatory Sodium persulfate.When the initial pH value of waste water is 3～4, react after 5 hours, the degradation rate of the aniline that generates in the water sample can reach 90%, and treatment effect is better.
The treatment effect of table 2. Zero-valent Iron and Sodium persulfate combined degradation oil of mirbane.
The result shows the oil of mirbane in Zero-valent Iron and the Sodium persulfate combined degradation waste water, and the pH value initial when waste water is 3～4, and the treatment effect of the oil of mirbane in the water sample is best.Reaction 2h degradation rate reaches 69%, and reaction 5 as a child degradation rate can reach 99%.
Embodiment 2:
Get certain knitting printing and dyeing mill and discharge waste water water sample 500mL, be about 200mg/L through detecting nitro phenenyl concentration.Regulate the original ph of water sample, making it satisfy pH is 3～4.The quality that adds Sodium persulfate is 5mg.Add Zero-valent Iron/Sodium Persulfate mole=1/50,1/25,1/15,1/10.Add Zero-valent Iron and peroxy-disulfuric acid sodium reagent simultaneously, at 0.25h, 0.5h, 1h, 2h, 3h, the concentration of aniline and oil of mirbane in the detection water sample of taking a sample during 5h.
Experimental result:
The treatment effect of table 1. Zero-valent Iron and Sodium persulfate combined degradation intermediate product aniline.
The result shows the oil of mirbane in the Zero-valent Iron reduction water sample, obtains intermediate product aniline, reacts after 0.5 hour, and the DeR of aniline occupies advantage, and aniline is further removed by Zero-valent Iron and the degraded of ferrous ion activatory Sodium persulfate.Add Zero-valent Iron/Sodium Persulfate molar ratio increase with crossing, the aniline treatment effect of the generation in the waste water is good more, can know that wherein Zero-valent Iron/Sodium Persulfate molar ratio is at 1/12～1/15 o'clock, and treatment effect is best.React after 5 hours, the degradation rate of the aniline that generates in the water sample can reach 96.5%.
The treatment effect of table 2. Zero-valent Iron and Sodium persulfate combined degradation oil of mirbane.
The result shows the oil of mirbane in Zero-valent Iron and the Sodium persulfate combined degradation waste water; Add Zero-valent Iron/Sodium Persulfate molar ratio increase with crossing; The treatment effect of the oil of mirbane in the waste water is good more, can know that wherein Zero-valent Iron/Sodium Persulfate molar ratio is at 1/10～1/15 o'clock, and treatment effect is best.React that degradation rate can reach more than 96% after 5 hours.
Embodiment 3:
Get certain knitting printing and dyeing mill and discharge waste water water sample 500mL, be about 200mg/L through detecting nitro phenenyl concentration.Regulate the original ph of water sample, making it satisfy pH is 3～4.Add Zero-valent Iron/Sodium Persulfate mole=1/10.The quality that adds Sodium persulfate is 0.5mg, 1mg, 2mg, 5mg.Add Zero-valent Iron and peroxy-disulfuric acid sodium reagent simultaneously, at 0.25h, 0.5h, 1h, 2h, 3h, the concentration of aniline and oil of mirbane in the detection water sample of taking a sample during 5h.
Experimental result:
The treatment effect of table 1. Zero-valent Iron and Sodium persulfate combined degradation intermediate product aniline.
The result shows the oil of mirbane in the Zero-valent Iron reduction water sample, obtains intermediate product aniline, reacts after 0.5 hour, and the DeR of aniline occupies advantage, and aniline is further removed by Zero-valent Iron and the degraded of ferrous ion activatory Sodium persulfate.Dosage with the peroxy-disulfuric acid sodium reagent increases, and the oil of mirbane treatment effect in the waste water is good more.React after 5 hours, the degradation rate of the aniline that generates in the water sample can reach 99%.
The treatment effect of table 2. Zero-valent Iron and Sodium persulfate combined degradation oil of mirbane.
The result shows the oil of mirbane in Zero-valent Iron and the Sodium persulfate combined degradation waste water, and with the concentration increase of Sodium persulfate, the treatment effect of the oil of mirbane in the waste water is good more.Reaction 1h degradation rate reaches 60%, and reaction 5 as a child degradation rate can reach 96%.
Embodiment 4:
Get certain knitting printing and dyeing mill and discharge waste water water sample 500mL, be about 200mg/L through detecting nitro phenenyl concentration.Regulate the original ph of water sample, making it satisfy pH is 3～4.Zero-valent Iron/Sodium Persulfate mole=1/10.The concentration that adds Sodium persulfate is 0.5mg, 1mg, 2mg, 5mg.Add Zero-valent Iron earlier, as a child added Sodium persulfate again in reaction 1, at 0.25h, 0.5h, 1h, 2h, 3h, the concentration of aniline and oil of mirbane in the detection water sample of taking a sample during 5h.
Experimental result:
The treatment effect of table 1. Zero-valent Iron and Sodium persulfate combined degradation intermediate product aniline.
The result shows Zero-valent Iron reduction oil of mirbane, a large amount of generation intermediate product aniline.Added Sodium persulfate in 1 hour again at subsequent reactions, aniline is further removed by the degraded of ferrous ion activatory Sodium persulfate.Concentration with Sodium persulfate increases, and the treatment effect of the oil of mirbane in the waste water is good more.React that the degradation rate of the aniline in the waste water can reach 98.2% after 5 hours.
The treatment effect of table 2. Zero-valent Iron and Sodium persulfate combined degradation oil of mirbane.
The result shows the oil of mirbane in Zero-valent Iron and the Sodium persulfate combined degradation waste water, and with the concentration increase of Sodium persulfate, the treatment effect of the oil of mirbane in the waste water is good more.Reaction 1h degradation rate reaches 50%, and reaction 5 as a child degradation rate can reach 94%.
Can know that through other embodiment the waste water that knitting printworks is discharged wherein contains a large amount of nitrobenzene organic pollutants.Make the initial pH on wastewater value reach at 3～4 o'clock; Add persulphate and be 1.5 times and be advisable; Zero-valent Iron and persulphate add mol ratio in 1/12～1/15 scope, the treatment effect of the nitrobenzene organic pollutant in its waste water is all reached more than 94%, and has saved the consumption of medicine.
Claims (6)
1. the treatment process of nitrobenzene organic pollutant in the waste water is characterized in that, is in the waste water that contains the nitrobenzene organic pollutant, to add zero-valent metal simultaneously or sequentially and persulphate is handled nitrobenzene organic pollutant in the waste water.
2. treatment process as claimed in claim 1 is characterized in that described zero-valent metal is the reductibility iron powder.
3. treatment process as claimed in claim 1 is characterized in that described persulphate is one or more in Sodium persulfate, Potassium Persulfate, the ammonium peroxydisulfate.
4. treatment process as claimed in claim 1 is characterized in that the pH value of described waste water initial environment is adjusted into 3～4.
5. treatment process as claimed in claim 1, the dosage that it is characterized in that described vitriol are 1.5xN times of the nitrobenzene organic contamination substrate concentration in the waste water, and N is a natural number; And the mol ratio of reductibility iron powder and persulphate is 1/10～1/50.
6. treatment process as claimed in claim 5, the mol ratio that it is characterized in that described reductibility iron powder and persulphate is 1/12～1/15.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100535731A CN102583690A (en) | 2012-03-02 | 2012-03-02 | Method for processing nitrobenzene organic pollutants in wastewater |
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| CN2012100535731A CN102583690A (en) | 2012-03-02 | 2012-03-02 | Method for processing nitrobenzene organic pollutants in wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944637A (en) * | 2015-06-09 | 2015-09-30 | 复旦大学 | Method for treating nitrobenzene waste liquid through iron scrap reduction by Fenton method |
| CN113198475A (en) * | 2021-04-29 | 2021-08-03 | 清创人和生态工程技术有限公司 | Preparation method and application of ferroalloy catalyst |
| CN113371809A (en) * | 2021-06-09 | 2021-09-10 | 浙江工业大学 | Aromatic carboxylic acid modified zero-valent iron agent and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0378888A1 (en) * | 1986-12-29 | 1990-07-25 | E.I. Du Pont De Nemours And Company | Destruction of nitrophenols |
| CN102225802A (en) * | 2011-04-12 | 2011-10-26 | 南京大学 | Method for inhibiting generation of dinitrobenzene compounds during processing aromatic hydrocarbon nitrified wastewater by using zero-valent irons |
-
2012
- 2012-03-02 CN CN2012100535731A patent/CN102583690A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0378888A1 (en) * | 1986-12-29 | 1990-07-25 | E.I. Du Pont De Nemours And Company | Destruction of nitrophenols |
| CN102225802A (en) * | 2011-04-12 | 2011-10-26 | 南京大学 | Method for inhibiting generation of dinitrobenzene compounds during processing aromatic hydrocarbon nitrified wastewater by using zero-valent irons |
Non-Patent Citations (1)
| Title |
|---|
| 杨世迎等: "零价铁还原和过硫酸盐氧化联合降解水中硝基苯", 《第六届全国环境化学大会暨环境科学仪器与分析仪器展览会摘要集》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944637A (en) * | 2015-06-09 | 2015-09-30 | 复旦大学 | Method for treating nitrobenzene waste liquid through iron scrap reduction by Fenton method |
| CN113198475A (en) * | 2021-04-29 | 2021-08-03 | 清创人和生态工程技术有限公司 | Preparation method and application of ferroalloy catalyst |
| CN113371809A (en) * | 2021-06-09 | 2021-09-10 | 浙江工业大学 | Aromatic carboxylic acid modified zero-valent iron agent and preparation method and application thereof |
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Application publication date: 20120718 |