CN105964679A - Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves - Google Patents
Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves Download PDFInfo
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- CN105964679A CN105964679A CN201610598562.XA CN201610598562A CN105964679A CN 105964679 A CN105964679 A CN 105964679A CN 201610598562 A CN201610598562 A CN 201610598562A CN 105964679 A CN105964679 A CN 105964679A
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- Prior art keywords
- chromium
- soil
- contaminated soil
- microwave
- reducing agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the field of soil heavy metal contamination repair and discloses a preparing method of a soil reducing agent for removing chromium contamination and a method for using the reducing agent to repair chromium-contaminated soil under the condition of the assistance of microwaves. The reducing agent is prepared from active carbon powder and Mn2+ liquid with the concentration of 40 mg/L. The method for using the reducing the agent to repair the contaminated soil comprises the steps that screened chromium-contaminated soil is mixed with the reducing agent, microwave radiation treatment is carried out for a while, and then repair of the chromium-contaminated soil is completed. By means of the method for using the reducing the agent to repair the contaminated soil, the time for repairing the contaminated soil can be greatly shortened, heavy metal chromium in the contaminated soil can be removed within a few minutes, and the demand for quick repair of heavy-metal-contaminated sites can be met.
Description
Technical field
The invention belongs to heavy metal pollution of soil and repair field, disclose a kind of for removing the reduction of chromium in contaminated soil
The preparation method of agent, and apply the method that this reducing agent repairs chromium-polluted soil under the conditions of microwave-assisted.
Background technology
Since reform and opening-up, with the fast development of chromium industry, nationwide soil Cr contamination accident is also gradually increasing
Many, the harm not only caused agricultural is gradually increased, and due to the expansion of food chain, to the murder by poisoning of animals and plants and people also not
Disconnected amplification.Due to historical reasons, in China's major part chromium salt factory production process, the solid waste of discharge does not take any antiseepage
Measure, the mode that main employing is simply stored up processes, the most regional in rainfall, and this Cr VI being readily soluble in water will be with
Drenching dewatering and enter soil, subsoil water or surface water, the pollution ratio causing soil is more serious.
At present, chromium-polluted soil reparation mainly has two kinds of approach: one is the existing forms changing heavy metal chromium in soil, and two
It is removal chromium from soil.Changing form is that such as by the immobilization stabilisation of chromium, fusion technology drops by the mode such as fixing
Its animal migration in the environment low and bioavailability.Heavy metal removal technology is to make it retain concentration close to or up soil
Heavy metal background value, such as Soil leaching technology, electric repairing technique and phytoremediation technology.
Immobilization and stabilisation are (can also to add certain reduction by being mixed with certain binding agent by the soil of pollution of chromium
Agent, for reduction of hexavalent chromium), fixed with the heavy metal chromium in soil by binding agent, reduce the bioavailability of chromium, make chromium
No longer migrate to surrounding, to reach the purpose of harmless to environment.Solidification and stabilization technology is for heavy metal pollutions such as chromium
The most widely used recovery technique of place soil.
Microwave heating is the microwave utilizing strong penetration capacity, gos deep into the inside of heating object, thus causes heating object
Body self starts heating and becomes heater, makes heating object internal and appearance heats simultaneously.Compare with traditional heating mode,
Microwave has (1) can heat the inside of heating object and appearance simultaneously, without convection current and quick heating, is heated evenly height
Effect is quick；(2) different according to material dielectric constant, the property of can be chosen heats；(3) thermal source is not directly contacted with heating material,
The corrosion of equipment can be avoided；(4) high density pollution thing concentration can carry out contracting to quantify to administer, and regulation effect has generally
Property；(5) microwave heating equipment volume is little, it is simple to the advantages such as operation.
Summary of the invention
The invention discloses a kind of for removing the preparation method of the reducing agent of chromium in contaminated soil, this reducing agent includes:
Activated carbon powder, the Mn of 40mg/L2+Liquid.Present invention also offers a kind of this reducing agent of application under the conditions of microwave-assisted, repair chromium
The method of contaminated soil.Its method step repairing chromium-polluted soil is: by the chromium-polluted soil that sieves with of the present invention
Reducing agent mixes, and microwave radiation processing a period of time, i.e. completes chromium-polluted soil reparation.
Beneficial effects of the present invention: the saturated carbon dust of manganese is a kind of good material absorbing microwave, can during microwave heating
Rapidly and efficiently heating soil, and be heated evenly.Secondly activated carbon will high price together with the organic matter of soil itself as reducing agent
The chromium of state reduces, and the fixing trivalent chromium of absorption reduces the toxicity of soil.And Mn2+There is catalytic action, can effectively promote
Enter activated carbon powder to reduction chromic in contaminated soil.
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is carried out clear, complete description, it is clear that described embodiment
It is only a part of embodiment of the present invention rather than whole embodiments.Based on embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into protection scope of the present invention.
The embodiment of the present invention provides a kind of reducing agent repairing chromium-polluted soil, can be used for coordinating reparation chromium with microwave reinforced
Contaminated soil, this reducing agent includes: activated carbon powder, Mn2+Solution.
Preferably, in this reducing agent, Mn2+The concentration of solution is 10 ~ 100mg/L.It is furthermore preferred that Mn2+The concentration of solution is
40mg/L。
The embodiment of the present invention also provides for a kind of method repairing chromium-polluted soil, and it is micro-to be that one utilizes above-mentioned reducing agent to work in coordination with
Wave radiation repairs the method for chromium-polluted soil, and the method comprises the following steps.
Being mixed with the above-mentioned reducing agent be given by the chromium-polluted soil sieved, add a certain amount of distilled water, microwave treatment is several
Minute, i.e. complete microwave reinforced reparation chromium-polluted soil；
In said method, the chromium-polluted soil sieved was the chromium-polluted soil that 200 eye mesh screens obtain, the pollution of chromium soil that will sieve
Earth mixes with above-mentioned reducing agent, reducing agent add ratio for 1 ~ 10%, it is preferred that the saturated carbon dust of manganese add ratio for 7%；
Preferably, after described chromium-polluted soil mixes with reducing agent, the moisture content of soil is 10 ~ 80%；It is furthermore preferred that described mixing
The moisture content of soil is 40%；
Preferably, described microwave irradiation power is 70 ~ 840W, and radiated time is 2 ~ 30min；It is furthermore preferred that described microwave radiation
Power is 700W, and radiated time is 15min.
The problem that the present invention is directed to existing reparation chromium-polluted soil, it is provided that an a kind of huge sum of money efficient, quick, eco-friendly
Belong to the restorative procedure of chromium-polluted soil, particularly chromium (mainly Cr VI form) total in clay is had higher reparation effect
Rate, the present invention uses the saturated carbon dust of manganese as reducing agent, well solves the ferrous iron that tradition fixing-stable technology is used
The renovation agent such as salt, sulfide causes secondary pollution and the problem destroying soil physico-chemical property.And this reducing agent is combined with microwave,
The process time shortening chromium-polluted soil that can strengthen, process 10 ~ 30min and i.e. can reach maximum material removal rate.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
Weigh 50g soil sample successively in a series of 100ml corundum crucibles, respectively with absorption 10mg/L, 20mg/L, 40mg/L,
60mg/L、80mg/L、100mg/LMn2+The activated carbon powder of ion, as microwave heating absorbing material, adds ratio for 7%, arranges micro-
Wave power is 700W, and exposure time is 10min.
Embodiment 2
Weigh 50g soil sample successively in a series of 100ml corundum crucibles, be separately added into the Mn of 1%, 2.5%, 5%, 7%, 9%, 10%2+
Saturated carbon dust mix homogeneously.Microwave power 700W, radiated time 10min.
Embodiment 3
Weigh 50g soil sample successively in a series of 100ml corundum crucibles, add the Mn of 7%2+Saturated carbon dust mix homogeneously.Arrange
Microwave power is 700W, and exposure time is 10min, and regulation compound moisture content is respectively 10%, 20%, 40%, 60%, 80%.
Embodiment 4
Weigh 50g soil sample successively in a series of 100ml corundum crucibles, add the Mn of 7%2+Saturated carbon dust mix homogeneously, keeps
Compound moisture content is 40%.Microwave power is being set gradually into 70W, 210W, 350W, 560W, 700W, 840W, irradiation is being set
Time is 10min.
Embodiment 5
Weigh 50g soil sample successively in a series of 100ml corundum crucibles, add the Mn of 7%2+Saturated carbon dust mix homogeneously.Micro-
When wave power is 700W, microwave irradiation time is set and is respectively 2min, 5min, 10min, 15min, 20min, 30min.
By above-mentioned five groups of embodiments it can be seen that utilize the reducing agent of the present invention to combine with microwave radiation, to contaminated soil
The removal of middle chromium has preferable effect, and chromic clearance is up to 98.90%, and the clearance of total chromium is up to 99.89%, and repairs
Effective, process time amount short, required medicament less, little to soil fail.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be as the criterion.
Claims (4)
1. the method that chromium-polluted soil is repaired in a microwave-assisted carbon reduction, it is characterised in that: comprise the following steps:
(1) the saturated carbon dust of reducing agent-manganese of chromium-polluted soil is repaired in preparation；
(2) saturated for manganese carbon dust is joined in chromium-polluted soil than 1 ~ 10% by adding, be sufficiently mixed；
(3) compound is placed in frequency conversion type microwave reactor, regulates power 70 ~ 840W, microwave radiation 2 ~ 30min；
(4) take out compound and measure the clearance of Chromium in Soil.
The method that chromium-polluted soil is repaired in the reduction of a kind of microwave-assisted carbon, it is characterised in that: step
(1) Mn in described reducing agent2+Concentration be 10 ~ 100mg/L.
The method that chromium-polluted soil is repaired in the reduction of a kind of microwave-assisted carbon, it is characterised in that: step
(2) moisture content of described compound is 10 ~ 80%.
The method that chromium-polluted soil is repaired in the reduction of a kind of microwave-assisted carbon, it is characterised in that: step
(4) clearance of described mensuration Chromium in Soil reaches more than 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610598562.XA CN105964679A (en) | 2016-07-28 | 2016-07-28 | Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves |
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| CN201610598562.XA CN105964679A (en) | 2016-07-28 | 2016-07-28 | Method for carbon reduction repair of chromium-contaminated soil with assistance of microwaves |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107353034A (en) * | 2017-07-27 | 2017-11-17 | 武汉理工大学 | A kind of method for preparing haydite using microwave sintering curing heavy metal chromium |
| CN107497843A (en) * | 2017-09-21 | 2017-12-22 | 福建农林大学 | A kind of method that low temperature pyrogenation repairs mercury contaminated soil |
| CN109940038A (en) * | 2019-04-09 | 2019-06-28 | 河北科技大学 | A kind of organic matter and hexavalent chromium combined contamination soil repair reactor and its restorative procedure |
| CN111229815A (en) * | 2020-02-13 | 2020-06-05 | 华南理工大学 | Method for restoring chromium-polluted site soil |
| CN111408613A (en) * | 2020-03-27 | 2020-07-14 | 北京石油化工学院 | Method and system for performing microwave heat treatment on polluted soil by bidirectional coupling and adjustable power |
| CN115870324A (en) * | 2023-01-06 | 2023-03-31 | 河北科技大学 | Continuous repairing device for organic contaminated soil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850357A (en) * | 2010-06-07 | 2010-10-06 | 中国科学院南京土壤研究所 | Processing method for microwave induced manganese dioxide catalytic degradation of polychlorinated biphenyl in soil |
| CN103084385A (en) * | 2013-01-28 | 2013-05-08 | 韩清洁 | Repairation method of chromium-polluted soil and corresponding equipment thereof |
| CN104841693A (en) * | 2015-05-29 | 2015-08-19 | 北京大学 | Hexavalent chromium contaminated soil in-situ remediation method |
-
2016
- 2016-07-28 CN CN201610598562.XA patent/CN105964679A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850357A (en) * | 2010-06-07 | 2010-10-06 | 中国科学院南京土壤研究所 | Processing method for microwave induced manganese dioxide catalytic degradation of polychlorinated biphenyl in soil |
| CN103084385A (en) * | 2013-01-28 | 2013-05-08 | 韩清洁 | Repairation method of chromium-polluted soil and corresponding equipment thereof |
| CN104841693A (en) * | 2015-05-29 | 2015-08-19 | 北京大学 | Hexavalent chromium contaminated soil in-situ remediation method |
Non-Patent Citations (1)
| Title |
|---|
| 吴风光: "微波辐射修复Cr（Ⅵ）污染土壤的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107353034A (en) * | 2017-07-27 | 2017-11-17 | 武汉理工大学 | A kind of method for preparing haydite using microwave sintering curing heavy metal chromium |
| CN107497843A (en) * | 2017-09-21 | 2017-12-22 | 福建农林大学 | A kind of method that low temperature pyrogenation repairs mercury contaminated soil |
| CN109940038A (en) * | 2019-04-09 | 2019-06-28 | 河北科技大学 | A kind of organic matter and hexavalent chromium combined contamination soil repair reactor and its restorative procedure |
| CN111229815A (en) * | 2020-02-13 | 2020-06-05 | 华南理工大学 | Method for restoring chromium-polluted site soil |
| CN111408613A (en) * | 2020-03-27 | 2020-07-14 | 北京石油化工学院 | Method and system for performing microwave heat treatment on polluted soil by bidirectional coupling and adjustable power |
| CN115870324A (en) * | 2023-01-06 | 2023-03-31 | 河北科技大学 | Continuous repairing device for organic contaminated soil |
| CN115870324B (en) * | 2023-01-06 | 2023-06-06 | 河北科技大学 | Organic contaminated soil continuous restoration device |
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Application publication date: 20160928 |