CN105176535A - Composite oxidizing agent for remedying soil polluted by petroleum - Google Patents
Composite oxidizing agent for remedying soil polluted by petroleum Download PDFInfo
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- CN105176535A CN105176535A CN201510511445.0A CN201510511445A CN105176535A CN 105176535 A CN105176535 A CN 105176535A CN 201510511445 A CN201510511445 A CN 201510511445A CN 105176535 A CN105176535 A CN 105176535A
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- petroleum
- kmno
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Abstract
The invention discloses a composite oxidizing agent for remedying soil polluted by petroleum. The oxidizing agent is composed of H2O2 and KMnO4 according to a weight ratio of (18-24):(5-9). The composite oxidizing agent has the advantages that two oxidizing agents are compounded to remedy soil polluted by petroleum, the oxidizing effect is enhanced, a synergetic effect is generated, and the optimal remediation effect is achieved. H2O2 can promote KMnO4 to carry out oxidization reactions; then Mn<2+> and MnO2, which are generated by decomposition of KMnO4, can promote the decomposition of H2O2 to generate HO.; and HO. has a very strong oxidizing effect, is an effect factor that can oxidize organic substances such as petroleum, plays an important role in the whole reaction process, and can rapidly oxidize and decompose pollutants.
Description
Technical field
The present invention relates to soil remediation field, especially relate to a kind of composite oxidant repaired for oil-polluted soils.
Background technology
Soil is that the mankind depend on for existence and the basis developed, but along with the development of petroleum economics, having quantity crude oil not etc. in the processes such as drilling well in oil field, well-flushing, oil recovery, transport, refining is discharged in environment, makes the pollution that neighbouring soil is subject in various degree.Oil the environment of human survival to the pollution of soil serious harm, and the annual production of current China's oil is more than 1 × 10
9t, and annual new contaminated soil is up to 1 × 10
5t.In oil-polluted soils, the crude oil of usual more than 80% is trapped within the topsoil of more than 50cm.Ecological environment of soil worsens, and pollutes to destroy and ploughs, and will finally affect the healthy of agro based economic development and the people.Therefore, petroleum-type Land pollution is administered is the guarantee of people life property safety, the guarantee of developing agricultural economy.
What adopts the reparation of oil-polluted soils at present is chemical oxidization method, namely to being sprayed in petroleum hydrocarbon contaminated soil or injection chemical oxidizing agent, as ClO
2, H
2o
2and Fenton, KMnO
4and O
3deng, make itself and pollution substance generation chemical reaction realize purifying the object of soil.Chemical oxidization method both can be used alone, also can with other recovery techniques (as biological restoration) conbined usage.Chemical oxidation method can be used as an economy before biological restoration or natural biology degraded and effective pretreatment process, and the method need not excavate soil, not spoiled soil structure, can flexible Application in the process of dissimilar pollutent, simultaneously can not cause secondary pollution to environment.
Consider from rehabilitation cost and repairing effect, be all adopt single oxygenant to repair oil-polluted soils at present, but facts have proved, dosage and oxidation effectiveness all do not reach desirable oxidation effectiveness.
Summary of the invention
The object of the present invention is to provide a kind of composite oxidant repaired for oil-polluted soils that can play oxygenant best effect.
For achieving the above object, the present invention can take following technical proposals:
The composite oxidant repaired for oil-polluted soils of the present invention, it is by H
2o
2and KMnO
4form by following weight: H
2o
2: KMnO
4=18 ~ 24:5 ~ 9.
Described H
2o
2weight percent concentration be 3mg/L, described KMnO
4weight percent concentration be 1mg/L.
For making its repairing effect better, described H
2o
2and KMnO
4weight part consist of H
2o
2: KMnO
4=15 ~ 21:5 ~ 7.
During preparation,
By H
2o
2the solution being mixed with concentration 3mg/L on request makes component A, preserves separately,
By KMnO
4the solution being mixed with concentration 1mg/L on request makes B component, preserves separately.
When using, component A and B component are sprinkled in soil in proportion, and fully mix with topsoil gong, pour water and soil moisture is reached capacity, then balance 10 ~ 15 days, after making composite oxidant reach steady state, the plantation of farm crop can be carried out normally.
The invention has the advantages that and by after two kinds of oxygenant compounds, oil-polluted soils is repaired, improve oxidation effectiveness, make up for each other's deficiencies and learn from each other between the two, played best repairing effect.Wherein, H
2o
2kMnO can be promoted
4produce oxidizing reaction, secondly KMnO
4decompose the Mn produced
2+, MnO
2h can be promoted
2o
2decompose and produce HO, and HO there is very strong oxygenizement, is the organic efficiency factors such as petroleum oxidate, plays an important role in whole reaction process, impels pollutent rapid oxidation to degrade.
As can be seen here, H
2o
2and KMnO
4in reaction process, there is the effect of catalysis each other, produce the very strong hydroxyl radical free radical of a large amount of oxidisability (HO) simultaneously, so the two collaborative comprehensive action promoted substantially increases the clearance to organic contaminants in soil.
Embodiment
Below in conjunction with specific embodiment, more detailed explanation is done to the present invention.
The composite oxidant repaired for oil-polluted soils of the present invention is by H
2o
2and KMnO
4two kinds of oxygenants are by following weight composition: H
2o
2: KMnO
4=18 ~ 24:5 ~ 9; For making it have better repairing effect, its proportioning can be H
2o
2: KMnO
4=15 ~ 21:5 ~ 7.
Described H
2o
2weight percent concentration be 3mg/L, described KMnO
4weight percent concentration be 1mg/L.
For making its repairing effect better, described H
2o
2and KMnO
4weight part consist of H
2o
215 ~ 21 parts, KMnO
45 ~ 7 parts.
During preparation,
By H
2o
2the solution being mixed with concentration 3mg/L makes component A, preserves separately,
By KMnO
4the solution being mixed with concentration 1mg/L makes B component, preserves separately.
After farm crop harvesting or before proportion of crop planting, first the soil in farmland is carried out turning over, harrow even, the soil block particle diameter of more than 90% is made to be less than 10cm, then the component A of composite oxidant and B component are sprinkling upon soil surface successively, and composite oxidant and plough horizon are fully mixed, then pour water in farmland, soil moisture is reached capacity back balance 10 ~ 15 days, make renovation agent reach steady state, then just can carry out proportion of crop planting normally.
As, certain oil field polluted agricultural land (be divided into D1, D2, D3, D4, D5 five pieces and test field), after tested, its other physico-chemical properties of petroleum hydrocarbon component, content and soil see the following form 1:
Table 1
In governance process, D1 block Tanaka imposes oxygenant H
2o
2, D2 block Tanaka imposes oxygenant KMnO
4, D3 block Tanaka imposes composite oxidant of the present invention, and D4 block Tanaka imposes oxygenant ClO
2, D5 block Tanaka imposes oxygenant Fenton reagent.Plant wheat Tanaka after improvement simultaneously.After harvesting wheat, analyze wheat yield and petroleum hydrocarbon content respectively, see the following form 2.
Table 2
As can be seen from upper table 2, use the soil after composite oxidant reparation of the present invention can make wheat normal growth, compared with the experimental plot being used alone single-oxidizer, the content of soil Petroleum Hydrocarbon in the experiment field of composite oxidant of the present invention is adopted greatly to reduce, well below other experiment field.
Attached: the mechanism of action of composite oxidant of the present invention:
One, H
2o
2independent reaction
First, H
2o
2and KMnO
4there is dissociation reaction, H in part in water respectively
2o
2produce HO-and H+ ion, that is: H
2o
2 hO
2-+2H
+
Two, H
2o
2accelerate MnO
4-oxidizing reaction
Due to H
2o
2there is slightly acidic, and MnO
4 +unstable in an acidic solution, therefore MnO
4-can accelerate decomposition, that is: 4MnO under the existence having H+
4-+4H+=4MnO
2↓+2HO
2+ 3O
2↑
Meanwhile, H
2o
2reductibility is shown, so following reaction can be there is again when running into strong oxidizer:
2MnO
4－+5H
2O
2+6H+→2Mn2++5O
2↑+8H
2O
2MnO
4－+3H
2O
2→2MnO
2↓+3O
2↑+2OH－+2H
2O
Three, Mn
2+, MnO
2accelerate H
2o
2reaction
The Mn2+ produced, is easy to oxidized, again following reaction occurs further:
Mn2++2H
2O
2=MnO(OH)
2↓+2H
2O
Mn2+ also can catalysis H
2o
2resolve into hydroxyl radical free radical (HO), again due to KMnO
4with the MnO that centre generates
2all there is very strong oxidisability, finally make H
2o
2what dissociation generated crosses HO
2-rapid oxidation becomes hydroxyl radical free radical (HO), HO
2→ HO
2→ HO.
Claims (3)
1., for the composite oxidant that oil-polluted soils is repaired, it is characterized in that: it is by H
2o
2and KMnO
4form by following weight: H
2o
2: KMnO
4=18 ~ 24:5 ~ 9.
2. the composite oxidant repaired for oil-polluted soils according to claim 1, is characterized in that: described H
2o
2weight percent concentration be 3mg/L, described KMnO
4weight percent concentration be 1mg/L.
3. the composite oxidant repaired for oil-polluted soils according to claim 1 and 2, is characterized in that: described H
2o
2and KMnO
4weight part consist of H
2o
2: KMnO
4=15 ~ 21:5 ~ 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510511445.0A CN105176535A (en) | 2015-08-19 | 2015-08-19 | Composite oxidizing agent for remedying soil polluted by petroleum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510511445.0A CN105176535A (en) | 2015-08-19 | 2015-08-19 | Composite oxidizing agent for remedying soil polluted by petroleum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105176535A true CN105176535A (en) | 2015-12-23 |
Family
ID=54898975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510511445.0A Pending CN105176535A (en) | 2015-08-19 | 2015-08-19 | Composite oxidizing agent for remedying soil polluted by petroleum |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352770A (en) * | 2017-09-18 | 2017-11-17 | 北京惠博普能源技术有限责任公司 | A kind of Sludge in Oilfields oxidant |
| CN110079322A (en) * | 2019-04-30 | 2019-08-02 | 湖南省和清环境科技有限公司 | A kind of polycyclic aromatic hydrocarbon pollution treatment formulations and method and purposes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464455A (en) * | 2013-09-11 | 2013-12-25 | 中科华南（厦门）环保有限公司 | Method for carrying out chemical oxidation repair on organic contaminated soil by compounding potassium permanganate (KMnO4) and hydrogen peroxide (H2O2) |
| CN103537481A (en) * | 2013-10-30 | 2014-01-29 | 江苏上田环境修复有限公司 | Preparation method of curing isolation impervious body for organic pollutants |
-
2015
- 2015-08-19 CN CN201510511445.0A patent/CN105176535A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464455A (en) * | 2013-09-11 | 2013-12-25 | 中科华南（厦门）环保有限公司 | Method for carrying out chemical oxidation repair on organic contaminated soil by compounding potassium permanganate (KMnO4) and hydrogen peroxide (H2O2) |
| CN103537481A (en) * | 2013-10-30 | 2014-01-29 | 江苏上田环境修复有限公司 | Preparation method of curing isolation impervious body for organic pollutants |
Non-Patent Citations (1)
| Title |
|---|
| 邱立萍等: "《双氧水-高锰酸钾催化氧化降解地下水中硝基苯的效能与机理》", 《环境工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352770A (en) * | 2017-09-18 | 2017-11-17 | 北京惠博普能源技术有限责任公司 | A kind of Sludge in Oilfields oxidant |
| CN110079322A (en) * | 2019-04-30 | 2019-08-02 | 湖南省和清环境科技有限公司 | A kind of polycyclic aromatic hydrocarbon pollution treatment formulations and method and purposes |
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Application publication date: 20151223 |