CN101658803A - Soil catalyst and application in the degradation of organic pollutants thereof - Google Patents
Soil catalyst and application in the degradation of organic pollutants thereof Download PDFInfo
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- CN101658803A CN101658803A CN200910175047A CN200910175047A CN101658803A CN 101658803 A CN101658803 A CN 101658803A CN 200910175047 A CN200910175047 A CN 200910175047A CN 200910175047 A CN200910175047 A CN 200910175047A CN 101658803 A CN101658803 A CN 101658803A
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Abstract
The invention provides a soil catalyst and an application in the degradation of organic pollutants thereof. The preparation method of the soil catalyst comprises the following steps: using the wet heating treatment to sterilize the soil, performing air drying, grinding, sieving with a 200 meshes sieve and storing the obtained product in a dryer to obtain the soil catalyst. The soil catalyst provided by the invention has simple preparation method, the self cleaning capacity of the soil that the soil can degrade and convert chemical pollutants and kill the pathogenic microorganism can be fully used so as to create a new method of degrading organic pollutants, and the method can realize the treatment of organic pollutants by using lower cost.
Description
Technical field
The present invention relates to a kind of Preparation of catalysts method that directly obtains by soil; The invention still further relates to the application of this soil catalyst in degradable organic pollutant.
Background technology
Soil is the important component part of ecological environment, is the basis that human society is depended on for existence and development.Soil is by solid phase (solid matters such as mineral matter and organic matter), liquid phase (soil moisture) and gas phase (soil air) are formed, owing to wherein comprise various biologies and abitotic substance, therefore have absorption, exchange, complexing, chelation and redox, have degraded, transform chemical pollutant and kill the self-purification capacity of pathogenic microorganisms.Directly do not appear in the newspapers with soil as urging agent to be used for the degradation of organic substances pollution.
Summary of the invention
The objective of the invention is to provide a kind of catalyst that from soil, is prepared into; Another object of the present invention is the application of this soil catalyst in degradable organic pollutant.
The object of the present invention is achieved like this: a kind of soil catalyst, and soil is air-dry by wet heating sterilization back, grind, cross 200 mesh sieves, be stored in the drier, obtain soil catalyst.
The soil catalyst content of organic matter 2.14%, acidity 5.14, the quality percentage composition of Fe, Mn, Cu, Co, Zn is respectively 3.88%, 0.37%, 0.0070%, 0.0035%, 0.0072%.
The control temperature is 121 ℃ during the wet heating sterilization,, sterilization time is 30min.
The application of soil catalyst in degradable organic pollutant.
Soil catalyst provided by the invention, the preparation method is simple, made full use of the degraded that soil itself has, transformed chemical pollutant and killed the self-purification capacity of pathogenic microorganisms, obtained a kind of new method of degradable organic pollutant, can finish the processing of organic pollution with lower cost.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 SRB is with the variation of reaction time absorption spectrum
[SRB]＝1.50×10
-5mol/L，[soil]＝0.20g/L，[H
2O
2]＝1.50×10
-4mol/L，pH＝3.00，vis
Utilize Soil/H2O
2System degraded SRB, the variation of SRB absorption spectrum shows in the system: SRB is at the 565nm place Maximum absorption band is arranged, and along with the carrying out of reaction, its characteristic absorption peak constantly reduces, and during reaction 240min, SRB is tending towards Fully decolouring.
The different systems of Fig. 2 are to the degraded of SRB
[SRB]＝1.50×10
-5mol/L，[soil]＝0.20g/L，[H
2O
2]＝1.50×10
-4mol/L，pH＝3.00
At differential responses condition (Soil/H2O
2/vis、Soil/H
2O
2/dark、Soil/vis、H
2O
2/ vis) under, the degradation kinetics curve of SRB is seen Fig. 1, therefrom as seen: Soil/H2O
2Under/vis the condition, the SRB decolouring is the fastest, and 240min has decoloured Entirely, and under the dark reaction condition, reaction 60min, after percent of decolourization reached 25.59%, decolorization rate slowed down, during 240min, Percent of decolourization 34.15% illustrates that radiation of visible light can obviously improve system to the degradation efficiency of SRB; The reaction of Soil/ visible light In, SRB decolours hardly, illustrates after the adsorption-desorption balance there is not H2O
2Participate in, soil constituent can't be fallen in oxidation Separate SRB.
The circulation of Fig. 3 catalytic reaction
[SRB]＝1.20×10
-5mol/L，[soil]＝1.00g/L，[H
2O
2]＝1.50×10
-4mol/L，pH＝3.00
Investigate the stability of soil catalyst, carried out the circulation degradation experiment of light-catalyzed reaction SRB.The solution that to go up a circulation before next one circulation separates by natural subsidence, keeps the SRB that catalyst adds isodose, adds H after the adsorption/desorption balance
2O
2Carry out next one circulation.After soil catalyst recycles 5 times, still keeping good photocatalytic activity, illustrating that catalyst has good stability.
The variation of COD in Fig. 4 SRB degradation process
[SRB]＝3.00×10
-5mol/L，[soil]＝0.50g/L，[H
2O
2]＝3.75×10
-4mol/L，pH＝3.00
Under selected condition, the COD clearance of SRB reactant liquor 10h light reaction, dark reaction is respectively 90.44%, 56.86%.Shown the mineralizing and degrading of system to organic dyestuff, visible light has promoted the mineralising reaction.
Dynamic (dynamical) variation of Fig. 5 DCP degraded
[2，4-DCP]＝1.00×10
-4mol/L，[soil]＝0.20g/L，[H
2O
2]＝1.50×10
-4mol/L，pH＝3.00
Soil/H
2O
2/ dark and soil/H
2O
2/ vis system 240min is respectively the clearance of DCP: 18.59% and 80.55%.Illustrate that visible light can promote the oxidative degradation of DCP, because DCP do not absorb visible light, the mechanism of the visible light accelerated degradation different-phase catalyst (soil) that should be excited by visible light in the reaction and quickened reaction.
The specific embodiment
Embodiment:
The soil catalyst preparation: soil is air-dry by wet heating sterilization back, grind, cross 200 mesh sieves, be stored in the drier, obtain soil catalyst.The control temperature is 121 ℃ during the wet heating sterilization,, sterilization time is 30min.
The soil catalyst content of organic matter 2.14% that obtains, acidity 5.14, the quality percentage composition of Fe, Mn, Cu, Co, Zn is respectively 3.88%, 0.37%, 0.0070%, 0.0035%, 0.0072%.
Use this catalyst degradation organic pollution:
1, (Sulforhodamine B, decolouring SRB) add 1.5mL SRB (5 * 10 successively in the cylindrical Pyrex bulb of 70mL to acid brilliant pink
-4Mol/L), 10mg soil, regulate pH to 3.00 with perchloric acid or NaOH, be settled to 50mL, place the darkroom to stir 60min to reach the absorption-desorption balance.Add 100 μ l H then
2O
2(7.49 * 10
-2Mol/L) pick up counting, at interval with the sampling of Ep pipe, high speed centrifugation is measured its absorbance, the variation of tracking and measuring SRB absorbance with ultraviolet-uisible spectrophotometer at the 565nm place in different time.The result shows, Soil/H
2O
2/ vis system ([SRB]=1.50 * 10
-5Mol/L, [soil]=0.20g/L, [H
2O
2]=1.50 * 10
-4Mol/L, the pH=3.00) SRB that can degrade effectively, reaction 240min can decolour fully.
2, to the mineralizing and degrading of SRB, in the 500mL reactor, reaction volume is 200mL, system condition: [SRB]=3.00 * 10
-5Mol/L, [soil]=0.50g/L, [H
2O
2]=3.75 * 10
-4Mol/L, pH=3.00, radiation of visible light.With the chemical oxygen demand COD of dichromate titration (GB 11914-89) assaying reaction solution, get regularly reactant liquor of 20mL, add 10mL K
2Cr
2O
7Solution (0.025mol/L), zeolite and 30mL H
2SO
4-Ag
2SO
4Solution boils condensing reflux 2h, cooling back 0.01mol/L (NH
4)
2Fe (SO
4)
26H
2O (demarcating with potassium bichromate before using) titration is scaled reaction liquid C OD value.The result shows, Soil/H
2O
2/ vis system ([SRB]=3.00 * 10
-5Mol/L, [soil]=0.50g/L, [H
2O
2]=3.75 * 10
-4Mol/L, pH=3.00), 10h COD clearance reaches 90.44%.
3, to 2, and the 4-chlorophenesic acid (2,4-Dichlorophenol, removal DCP) adds 1.0mL DCP solution (5.00 * 10 successively in the cylindrical Pyrex bulb of 70mL
-3Mol/L), the 10mg soil catalyst, regulate pH to 3.00 with perchloric acid or NaOH, be settled to 50mL, place the darkroom to stir 60min to reach the absorption-desorption balance.Add 100 μ l 7.49 * 10 then
-2The H of mol/L
2O
2Solution, timing also begins reaction, takes a sample at interval in different time, pacifies the variation that basic antipyrine (4-AAP) colorimetric method is followed the tracks of the DCP amount with 4-.The result shows, Soil/H
2O
2/ vis system ([2,4-DCP]=1.00 * 10
-4Mol/L, [soil]=0.20g/L, [H
2O
2]=1.50 * 10
-4Mol/L, pH=3.00) reaction 240min, the clearance of DCP reaches 80.55%.
Claims (4)
1, a kind of soil catalyst is characterized in that: soil is air-dry by wet heating sterilization back, grind, and cross 200 mesh sieves, be stored in the drier, obtain soil catalyst.
2, soil catalyst according to claim 1 is characterized in that: its content of organic matter 2.14%, and acidity 5.14, the quality percentage composition of Fe, Mn, Cu, Co, Zn is respectively 3.88%, 0.37%, 0.0070%, 0.0035%, 0.0072%.
3, soil catalyst according to claim 1 is characterized in that: the control temperature is 121 ℃ during the wet heating sterilization, and sterilization time is 30min.
4, the application of the described soil catalyst of claim 1 in degradable organic pollutant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910175047A CN101658803A (en) | 2009-09-17 | 2009-09-17 | Soil catalyst and application in the degradation of organic pollutants thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910175047A CN101658803A (en) | 2009-09-17 | 2009-09-17 | Soil catalyst and application in the degradation of organic pollutants thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101658803A true CN101658803A (en) | 2010-03-03 |
Family
ID=41787178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910175047A Pending CN101658803A (en) | 2009-09-17 | 2009-09-17 | Soil catalyst and application in the degradation of organic pollutants thereof |
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| Country | Link |
|---|---|
| CN (1) | CN101658803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112495373A (en) * | 2020-12-10 | 2021-03-16 | 重庆大学 | Manganese-containing soil low-temperature denitration catalyst and preparation method thereof |
-
2009
- 2009-09-17 CN CN200910175047A patent/CN101658803A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112495373A (en) * | 2020-12-10 | 2021-03-16 | 重庆大学 | Manganese-containing soil low-temperature denitration catalyst and preparation method thereof |
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Open date: 20100303 |