CN104438312B - A kind of restorative procedure in severe combined pollution place - Google Patents
A kind of restorative procedure in severe combined pollution place Download PDFInfo
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Abstract
The invention discloses the restorative procedure in a kind of severe combined pollution place.The method utilizes load ferrum attapulgite and microwave-assisted Combined Treatment Organic substance and heavy metal to be combined heavily contaminated place.Carry ferrum attapulgite by self institute's band structure electric charge and lattice defect, hydroxyl complexation chelation absorption Organic substance and stabilisation heavy metal, under microwave action, ferrum modified activation attapulgite has the absorbing property of excellence, beneficially soil warming to be fixed heavy metal and realizes long-acting stable；Oxygen and soil moisture in high temperature degradation effect, catalytic air under load iron modified active attapulgite microwave field, exciting hydroxyl radical free radical oxidative degradation to process Organic substance, the specific surface area of the attapulgite excellence that ferrum is modified simultaneously is conducive to adsorbing catabolite.The new method that the present invention provides, material preparation process is simple, processes reaction process flow process simple, cheap environmental protection, fast and stable.
Description
Technical field
The invention belongs to Treatment process field, severe combined pollution place, more particularly, to one weight
The restorative procedure in degree combined pollution place.
Background technology
In recent years, along with fast development and the adjustment of industrial pattern of Urbanization in China, most
Large quantities of chemical industry of old town, big and medium-sized cities, smelt, enterprises remove or the closedown such as plating, owing to these are looked forward to
Industry equipment is outmoded, Industrial " three Waste " treatment technology imperfection, causes having left over large stretch of heavily contaminated place.This
The most all there is the heavy metal of high concentration and organic combined pollution in a little heavily contaminated places.
The soil remediation of Organic substance and heavy metal pollution is mainly included peripheral doses, biological restoration and change
Learning and repair, Physical processing cost is high, big for high concentration heavy metal pollution sitework amount, to height
Concentration organic can not realize thorough degradation of organic substances and can produce secondary pollution problem；Biological restoration
Contaminated site for high concentration level is repaired inapplicable.Chemical restoration is steady owing to having regulation effect
The advantages such as fixed, thorough, the improvement being applicable to serious pollution soil and obtain and pay close attention to widely.
Currently for combined pollution reparation research still in be advanced slowly and situation seek quickness again speed send out
In the stage of exhibition, combined contamination soil many employings heavy metal and Organic substance are processed respectively and reach to repair
Multiple purpose, what the nowadays soil realization about combined pollution was repaired simultaneously chemical restoration mainly uses
Chemical leaching technology and hot-fixing.But, for elution technique, due to heavy metal with have
Machine thing differs greatly, and single eluant heavy metal and Organic substance eluting simultaneously has certain limitation, to soil
Matter also has certain requirement, and eluent needs to process further；And for hot-fixing,
It uses and burns with microwave technology as main recovery technique, but incineration technology energy consumption is higher.
Summary of the invention
For disadvantages described above or the Improvement requirement of prior art, the invention provides the compound dirt of a kind of severe
The restorative procedure in dye place, it is intended that solve in existing chemical repair method, it is achieved heavy metal
Elution technique single eluent limitation and the energy of hot-fixing when repairing with Organic Pollution simultaneously
Consume high problem.
For achieving the above object, according to one aspect of the present invention, it is provided that a kind of severe combined pollution
The restorative procedure in place, comprises the steps:
(1) clay mineral is carried out activation act, and carry out carrying clunch to the clay mineral after activation
Mineral preparation manipulation；
(2) will enter from the contaminated soil in severe combined pollution place, water, load clunch mineral three
Row uniformly mixing, wherein water is 0%～40% with the mass ratio of contaminated soil, and contaminated soil glues with carrying ferrum
Mass ratio between soil mineral is between 10:0.25 to 10:4；
(3) mixture obtained in step (2) is carried out microwave treatment, wherein microwave treatment time
Between be more than or equal to 5 minutes.
Preferably, clay mineral is attapulgite, zeolite, bentonite or montmorillonite etc..
Preferably, step (1) carries out activation act to clay mineral to specifically include that
By ultra-pure water clay mineral washed and stand, to go the removal of impurity, then at ultrasonic point
Under Saning, this clay mineral is carried out the bleaching that sterilizes, no longer has to it bubble to emerge；
Utilize acid solution that this clay mineral carries out acid bubble activation, and the concentration of this acid solution exists
0.1～1M, soak time is more than or equal to 1 hour；
With ultra-pure water or dehydrated alcohol, this clay mineral is washed to pH value weakly acidic pH, dry for standby,
Dry temperature at 70 DEG C～105 DEG C.
Preferably, the clay mineral after activation is carried out carrying the preparation behaviour of clunch mineral by step (1)
Work is to use Fe3+Saline solution carries out impregnation process, finally at vacuum condition to the clay mineral after activation
Under be dried, baking temperature is at 70 DEG C～105 DEG C.
Preferably, Fe used by infusion process3+Saline solution is Fe (NO3)3Or FeCl3, concentration is
0.1～0.5M, dip time is 12h～24h, and calcining heat is 200 DEG C～600 DEG C, and calcination time is
3～5h.
Preferably, the clay mineral after activation is carried out carrying the preparation behaviour of clunch mineral by step (1)
Work is to use Fe2+、Fe3+Solution to activation after clay mineral carry out supersonic coprecipitation process, finally
Being dried under vacuum, baking temperature is at 70 DEG C～105 DEG C.
Preferably, Fe used2+、Fe3+, concentration of lye than for 1:2:2.5～1:3:2.5, alkali liquor is NaOH
Or ammonia, concentration is 0.5～1M.
Preferably, the clay mineral after activation is carried out carrying the preparation behaviour of clunch mineral by step (1)
Work is to use Fe3+Saline solution carries out impregnation process to the clay mineral after activation, and uses Fe2+、Fe3+
Solution to activation after clay mineral carry out supersonic coprecipitation process, carry out the most under vacuum
Being dried, baking temperature is at 70 DEG C～105 DEG C.
Preferably, Fe used by infusion process3+Saline solution is Fe (NO3)3Or FeCl3, concentration is
0.1～0.5M, dip time is 12h～24h, and calcining heat is 200 DEG C～600 DEG C, and calcination time is
3～5h, the Fe used by supersonic and co-deposition2+、Fe3+, concentration of lye is than for 1:2:2.5～1:3:2.5, alkali
Liquid is NaOH or ammonia, and concentration is 0.5～1M.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it is possible to
Obtain following beneficial effect:
(1) heavy metal is solved and technical problem that Organic Pollution is repaired simultaneously: owing to have employed step
Suddenly the load clunch mineral that prepared by (1) as renovation agent, according to method in step (2) by Polluted Soil,
Renovation agent and water mix by a certain percentage, require microwave treatment according to step (3), and renovation agent microwave is made
Both had absorption and the effect of oxidative degradation under with to Organic substance, heavy metal also has stable/immobilization role；
(2) elution technique single eluent office in existing combined pollution chemical remediation technology is solved
Limit problem: load clunch mineral environmental friendliness prepared by the step (1) of employing and to prepare material the easiest
, preparation technology is simple；Repair and the soil texture is the most substantially limited to；There is bigger specific surface area
The clunch mineral carried, process for heavy metal, can pass through structure charge and lattice defect, hydroxyl network
The adsorptions such as conjunction and microwave field high temperature fixation are stable, process for Organic substance, both can pass through
Structure charge and the chelating such as lattice defect, hydroxyl are adsorbed with machine thing, again can microwave induced ferrum catalysis moisture
Oxygen in son and air, produces oxidative free radical (such as hydroxyl radical free radical, oxygen-derived free radicals etc.) fall
Solve Organic substance, there is significant catalytic oxidation effect.
(3) problem that in existing combined pollution chemical remediation technology, hot-fixing energy consumption is high is solved:
The load clunch mineral environmental friendliness prepared of step (1) that uses and to prepare material cheap and easy to get, preparation
Technique is simple；The microwave repairing method used have equipment simple, efficiently, quick, selectivity heating,
The features such as operating cost is low；
(4) present invention is applicable to each heavy metal species and the combined contamination soil of organic pollution level, work
Process flow is simple, is swift in response.Combined contamination soil can be sandy soil or the sandy loam of good penetrability, also
It can be the clay of poor permeability；Heavy metal contaminants can be the heavy metals such as lead, zinc, cadmium.
Accompanying drawing explanation
Fig. 1 is the flow chart of the restorative procedure in severe combined pollution place of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, the present invention is further elaborated.Should be appreciated that described herein specifically
Embodiment only in order to explain the present invention, is not intended to limit the present invention.Additionally, it is disclosed below
Just may be used as long as technical characteristic involved in each embodiment of the present invention does not constitutes conflict each other
To be mutually combined.
The basic ideas of the present invention are, use the mode of microwave heating can reduce reaction activity,
Accelerate reaction rate, the ferrum catalysis oxidation of organic compounds of microwave energy induction simultaneously.Attapulgite is by structure electricity
Organic substance in lotus and lattice defect, hydroxyl complexation chelation absorption soil and heavy metal, at microwave field
Under, microwave energy is heat energy by the good absorbing property carrying ferrum attapulgite, and high temperature promotes concavo-convex
Stable/immobilization of heavy metal in rod soil, and oxygen in microwave induced ferrum catalytic water molecule and air, produce
Raw oxidative free radical (such as hydroxyl radical free radical, oxygen-derived free radicals etc.), is conducive to organic contamination of degrading
Thing.
As it is shown in figure 1, the invention provides the restorative procedure in a kind of severe combined pollution place, its bag
Include following steps:
(1) clay mineral is carried out activation act, and carry out carrying clunch to the clay mineral after activation
Mineral preparation manipulation；In the present embodiment, clay mineral is attapulgite, it should be appreciated that other class
The clay mineral of type, such as zeolite, bentonite, montmorillonite etc., it is also possible to used.
This step is carried out activation act to clay mineral and specifically includes that to be entered clay mineral by ultra-pure water
Row washing and standing, to go the removal of impurity, then carrying out sterilization drift under ultrasonic disperse to this clay mineral
White process, no longer has to it bubble to emerge, utilizes thereafter acid solution (to use in the present embodiment
Sulphuric acid or hydrochloric acid) this clay mineral carried out acid bubble activation, and the concentration of this acid solution is 0.1～1M,
Soak time is more than or equal to 1 hour, is finally washed by this clay mineral with ultra-pure water or dehydrated alcohol
To pH value weakly acidic pH (i.e. pH value is between 6 to 7), dry for standby, dry temperature and exist
70 DEG C～105 DEG C.
It is to use Fe that this step carries out carrying the preparation manipulation of clunch mineral to the clay mineral after activation3+
Saline solution carries out impregnation process to the clay mineral after activation, and/or uses Fe2+、Fe3+Solution to work
Clay mineral after change carries out supersonic coprecipitation process, is dried the most under vacuum, is dried
Temperature is at 70 DEG C～105 DEG C；Wherein, Fe used by infusion process3+Saline solution can be Fe (NO3)3Or
FeCl3, concentration is 0.1～0.5M, and dip time is 12h～24h, and calcining heat is 200 DEG C～600 DEG C,
Calcination time is 3～5h, the Fe used by supersonic and co-deposition2+、Fe3+, concentration of lye ratio be
1:2:2.5～1:3:2.5, alkali liquor can be NaOH or ammonia, and concentration, 0.5～1M, adds alkali liquor extremely
PH value is 10～12 and stops supersonic coprecipitation process；
(2) will enter from the contaminated soil in severe combined pollution place, water, load clunch mineral three
Row uniformly mixing, wherein water is 0%～40% with the mass ratio of contaminated soil, and contaminated soil glues with carrying ferrum
Mass ratio between soil mineral is between 10:0.25 to 10:4；
(3) mixture obtained in step (2) is carried out microwave treatment, wherein microwave treatment time
Between be more than or equal to 5 minutes.
Embodiment 1:
For heavy metal and organic compound contaminated thing, use and prepare heavy metal Cd, Zn, organic voluntarily
Thing paranitrophenol (4-NP), the composite analogy Polluted Soil of phenol are experimental subject, carry out microwave auxiliary
Load ferrum attapulgite is helped to process Polluted Soil experiment.Simulated soil soil property belongs to sandy loam, simulating pollution
In soil, Cd, Zn, 4-NP, the concentration of phenol is respectively 10,10,500,500mg/kg.Carry
The preparation of ferrum attapulgite, selecting concentration is 1M hydrochloric acid activation attapulgite, the attapulgite after activation
Use FeCl2、FeCl3, NaOH concentration ratio for 1:2.5:2.5, NaOH concentration is that 0.5M preparation carries ferrum
Attapulgite, adding NaOH is 11 to pH value, and vacuum 24h baking temperature crosses 100 after 70 DEG C
Mesh sieve grinds standby；Contaminated soil, water, load ferrum attapulgite are mixed in quartz ampoule；Wherein,
The addition of water is the 20% of contaminated soil quality, and contaminated soil and load ferrum attapulgite, according to quality
Ratio 10:4 uniformly mixes, and mixture carries out microwave treatment, and microwave power is set to 700W, 560W,
420W, 280W, 140W, the microwave time is 20 minutes.After reaction measure heavy metal in soil Cd,
Zn leaching concentration and Organic substance 4-NP, phenol content, result see table 1.
Pollutant Treatment rate under table 1 different microwave
By upper table 1, for heavy metal Cd, Zn, Organic substance paranitrophenol (4-NP),
The composite analogy Polluted Soil of phenol, the load ferrum attapulgite prepared at Polluted Soil and supersonic coprecipitation adds
Ratio 10:4, water addition is 20%, under the conditions of microwave 20min, along with the increase of microwave power,
Heavy metal and Organic substance treatment effect all increased, when microwave power reaches 700W, with much money
Belong to and organic handling rate all reaches more than 90%.
Embodiment 2:
For heavy metal and organic compound contaminated thing, use and prepare heavy metal Cd, Pb, organic voluntarily
Thing paranitrophenol (4-NP), the composite analogy Polluted Soil of 2,4-Dichlorophenol (2,4-DCP) are experiment
Object, carries out microwave-assisted and carries the process Polluted Soil experiment of ferrum attapulgite.Simulated soil soil property belongs to
Sandy loam, in simulating pollution soil, Cd, Pb, 4-NP, 2, the concentration of 4-DCP is respectively 10,10,
500、500mg/kg.Carry the preparation of ferrum attapulgite, prepare two kinds and carry ferrum attapulgite, select concentration
For 1M hydrochloric acid activation attapulgite, the attapulgite after a kind of activation uses 0.2MFe (NO3)3Dipping
Preparation carries ferrum attapulgite material, and dip time is 24h, and calcining heat is 400 DEG C, after calcining 3h
Cross 100 mesh sieves and grind standby, the attapulgite FeCl after a kind of activation2、FeCl3, NaOH concentration
Ratio is 1:2.5:2.5, and NaOH concentration is that 0.5M preparation carries ferrum attapulgite, adds NaOH to pH
Value is 11, and vacuum 24h baking temperature is crossed 100 mesh sieves after 70 DEG C and ground standby；By contaminated soil,
Water, two kinds of load ferrum attapulgites are mixed in quartz ampoule；Wherein, the addition of water is Polluted Soil loamy texture
The 20% of amount, two kinds carry the mixing of ferrum attapulgite equal proportion, contaminated soil and two kinds of mixed load ferrum
Attapulgite, uniformly mixes according to mass ratio 10:0.5,10:1,10:2,10:3,10:4 respectively,
Mixture carries out microwave treatment, and microwave power is set to 700W, and the microwave time is 20 minutes.After reaction
Measure heavy metal in soil Cd, Pb leaching concentration and Organic substance 4-NP, 2,4-DCP content, result is shown in
Table 2 below.
Pollutant Treatment rate under the different adding proportion of table 2
By upper table 2, for heavy metal Cd, Pb, Organic substance paranitrophenol (4-NP),
The composite analogy Polluted Soil of 2,4-Dichlorophenols (2,4-DCP), load prepared by supersonic coprecipitation and infusion process
Ferrum attapulgite equal proportion mixes, and water addition is 20%, microwave power 700W, microwave 20min
Under the conditions of, along with the increase of load ferrum attapulgite addition, heavy metal and Organic substance treatment effect are equal
Increased, when under the conditions of this, Polluted Soil and the adding proportion carrying ferrum attapulgite reach 10:4, weight
Metal and organic handling rate all reach more than 90%.
Embodiment 3:
For heavy metal and organic compound contaminated thing, use and prepare heavy metal Zn, Pb, organic voluntarily
Thing paranitrophenol (4-NP), the composite analogy Polluted Soil of 2,4-Dichlorophenol (2,4-DCP) are experiment
Object, simulated soil soil property belongs to sandy soil, simulation soil is carried out microwave-assisted and carries at ferrum attapulgite
Reason Polluted Soil experiment.In simulating pollution soil, Zn, Pb, 4-NP, 2, the concentration of 4-DCP be respectively
10、10、500、500mg/kg.Carry the preparation of ferrum attapulgite, prepare two kinds and carry ferrum attapulgite clay, select
Concentration is 1M hydrochloric acid activation attapulgite, and the attapulgite after a kind of activation uses 0.2MFe (NO3)3
Dipping preparation carries ferrum attapulgite material, and dip time is 24h, and calcining heat is 400 DEG C, calcines 3h
Rear mistake 100 mesh sieve grinds standby, the attapulgite FeCl after a kind of activation2、FeCl3, NaOH dense
Degree ratio is 1:2.5:2.5, and NaOH concentration is that 0.5M preparation carries ferrum attapulgite, adds NaOH to pH
Value is 11, and vacuum 24h baking temperature is crossed 100 mesh sieves after 70 DEG C and ground standby；By contaminated soil,
Water, two kinds of load ferrum attapulgites are mixed in quartz ampoule；Wherein, the addition of water is Polluted Soil loamy texture
The 20% of amount, two kinds carry ferrum attapulgite clay equal proportion and mix, contaminated soil and two kinds of mixed load ferrum attapulgite clay,
Uniformly mixing according to mass ratio 10:4, mixture carries out microwave treatment, and microwave power is set to 700W,
The microwave time is respectively set as 10 minutes, 15 minutes, 20 minutes.A huge sum of money in soil is measured after reaction
Belong to Zn, Pb leaching concentration and Organic substance 4-NP, 2,4-DCP content, result see table 3.
Pollutant Treatment rate under the table 3 different microwave time
By upper table 3, for heavy metal Zn, Pb, Organic substance paranitrophenol (4-NP),
The composite analogy Polluted Soil of 2,4-Dichlorophenols (2,4-DCP), load prepared by supersonic coprecipitation and infusion process
Ferrum attapulgite equal proportion mixes, and Polluted Soil is 10:4 with the adding proportion of load ferrum attapulgite, and water adds
Dosage is 20%, under the conditions of microwave power 700W, along with the increase of microwave time, heavy metal and
Organic substance treatment effect all increased, when under the conditions of this, the microwave time reaches 20min, and heavy metal
More than 90% is all reached with organic handling rate.
Embodiment 4:
For heavy metal and organic compound contaminated thing, use and prepare heavy metal Zn, Cd, organic voluntarily
Thing paranitrophenol (4-NP), the composite analogy Polluted Soil of 2,4-Dichlorophenol (2,4-DCP) are experiment
Object, simulated soil soil property belongs to sandy loam, simulation soil is carried out microwave-assisted and carries ferrum attapulgite
Process Polluted Soil is tested.In simulating pollution soil, Zn, Pb, 4-NP, 2, the concentration of 4-DCP is respectively
Be 10,10,500,500mg/kg.Carry the preparation of ferrum attapulgite, prepare two kinds and carry ferrum attapulgite,
Selecting concentration is 1M hydrochloric acid activation attapulgite, and the attapulgite after a kind of activation uses
0.2MFe(NO3)3Dipping preparation carries ferrum attapulgite material, and dip time is 24h, and calcining heat is
400 DEG C, cross 100 mesh sieves after calcining 3h and grind standby, the attapulgite FeCl after a kind of activation2、
FeCl3, NaOH concentration ratio for 1:2.5:2.5, NaOH concentration is that 0.5M preparation carries ferrum attapulgite,
Adding NaOH is 11 to pH value, and vacuum 24h baking temperature is crossed 100 mesh sieves after 70 DEG C and ground standby
With；Contaminated soil, water, two kinds of load ferrum attapulgites are mixed in quartz ampoule；Wherein, the adding of water
Dosage is respectively the 0% of contaminated soil quality, 20%, 40%, and two kinds carry the mixing of ferrum attapulgite clay equal proportion,
Contaminated soil and two kinds of mixed load ferrum attapulgite clay, uniformly mix according to mass ratio 10:4, mixture
Carrying out microwave treatment, microwave power is set to 700W, and the microwave time is set as 20 minutes.Survey after reaction
Determine heavy metal in soil Zn, Cd leaching concentration and Organic substance 4-NP, 2,4-DCP content, result is shown in
Table 4 below.
Pollutant Treatment rate under the conditions of the different water addition of table 4
By upper table 4, for heavy metal Zn, Cd, Organic substance paranitrophenol (4-NP),
The composite analogy Polluted Soil of 2,4-Dichlorophenols (2,4-DCP), load prepared by supersonic coprecipitation and infusion process
Ferrum attapulgite equal proportion mixes, and Polluted Soil is 10:4 with the adding proportion of load ferrum attapulgite, microwave
Power 700W, under the conditions of microwave time 20min, along with the increase of the addition of water, heavy metal and
The change of Organic substance treatment effect is inconspicuous, it can thus be appreciated that aqueous situation is the most notable on repairing effect impact.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention,
Not in order to limit the present invention, all made within the spirit and principles in the present invention any amendment, etc.
With replacement and improvement etc., should be included within the scope of the present invention.
Claims (9)
1. the restorative procedure in a severe combined pollution place, it is characterised in that comprise the steps:
(1) clay mineral is carried out activation act, and carry out carrying clunch to the clay mineral after activation
Mineral preparation manipulation；
(2) will enter from the contaminated soil in severe combined pollution place, water, load clunch mineral three
Row uniformly mixing, wherein water is 0%～40% with the mass ratio of contaminated soil, and contaminated soil glues with carrying ferrum
Mass ratio between soil mineral is between 10:0.25 to 10:4；
(3) mixture obtained in step (2) is carried out microwave treatment, wherein microwave treatment time
Between be more than or equal to 5 minutes.
Restorative procedure the most according to claim 1, it is characterised in that clay mineral is attapulgite
Soil, zeolite, bentonite or montmorillonite.
Restorative procedure the most according to claim 1, it is characterised in that to viscous in step (1)
Soil mineral carry out activation act and specifically include that
By ultra-pure water clay mineral washed and stand, to go the removal of impurity, then at ultrasonic point
Under Saning, this clay mineral is carried out the bleaching that sterilizes, no longer has to it bubble to emerge；
Utilize acid solution that this clay mineral carries out acid bubble activation, and the concentration of this acid solution exists
0.1～1M, soak time is more than or equal to 1 hour；
With ultra-pure water or dehydrated alcohol, this clay mineral is washed to pH value weakly acidic pH, dry for standby,
Dry temperature at 70 DEG C～105 DEG C.
Restorative procedure the most according to claim 3, it is characterised in that to work in step (1)
It is to use Fe that clay mineral after change carries out carrying the preparation manipulation of clunch mineral3+After saline solution is to activation
Clay mineral carry out impregnation process, be dried the most under vacuum, baking temperature exists
70 DEG C～105 DEG C.
Restorative procedure the most according to claim 4, it is characterised in that Fe used by infusion process3+Salt
Solution is Fe (NO3)3Or FeCl3, concentration is 0.1～0.5M, and dip time is 12h～24h, calcining
Temperature is 200 DEG C～600 DEG C, and calcination time is 3～5h.
Restorative procedure the most according to claim 3, it is characterised in that to work in step (1)
It is to use Fe that clay mineral after change carries out carrying the preparation manipulation of clunch mineral2+、Fe3+Solution to work
Clay mineral after change carries out supersonic coprecipitation process, is dried the most under vacuum, is dried
Temperature is at 70 DEG C～105 DEG C.
Restorative procedure the most according to claim 6, it is characterised in that Fe used2+、Fe3+、
Concentration of lye is than for 1:2:2.5～1:3:2.5, and alkali liquor is NaOH or ammonia, and concentration is 0.5～1M.
Restorative procedure the most according to claim 3, it is characterised in that to work in step (1)
It is to use Fe that clay mineral after change carries out carrying the preparation manipulation of clunch mineral3+After saline solution is to activation
Clay mineral carry out impregnation process, and/or use Fe2+、Fe3+Solution to activation after clay mineral
Carrying out supersonic coprecipitation process, be dried the most under vacuum, baking temperature exists
70 DEG C～105 DEG C.
Restorative procedure the most according to claim 8, it is characterised in that Fe used by infusion process3+Salt
Solution is Fe (NO3)3Or FeCl3, concentration is 0.1～0.5M, and dip time is 12h～24h, calcining
Temperature is 200 DEG C～600 DEG C, and calcination time is 3～5h, the Fe used by supersonic and co-deposition2+、Fe3+、
Concentration of lye is than for 1:2:2.5～1:3:2.5, and alkali liquor is NaOH or ammonia, and concentration is 0.5～1M.
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| CN111423885B (en) * | 2020-05-08 | 2021-03-30 | 吉林大学 | Passivator for Cd and Pb pollution in farmland soil and preparation method and restoration method thereof |
| CN114054484B (en) * | 2020-07-31 | 2024-06-07 | 中国石油化工股份有限公司 | Permeable reactive barrier and method for repairing polluted underground water by same |
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| CN101513643A (en) * | 2009-03-20 | 2009-08-26 | 华中科技大学 | In situ microwave repairing method and apparatus of contaminated soil |
| CN103286120B (en) * | 2013-06-07 | 2014-10-08 | 华北电力大学 | Microwave electric soil in-situ restoration device and restoration method |
| CN103551373B (en) * | 2013-11-21 | 2015-03-04 | 华北电力大学 | System and method for removing organic pollutants in soil employing microwave-assisted soil vapor extraction (SVE) |
| CN103894407B (en) * | 2014-03-24 | 2015-12-02 | 华南理工大学 | A kind of method of restoration of soil polluted by heavy metal |
| CN104070060B (en) * | 2014-06-20 | 2015-10-28 | 江苏中宜生态土研究院有限公司 | A kind of chromium-contaminatesoil soil remediation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108504360A (en) * | 2018-03-12 | 2018-09-07 | 湖南金旅环保股份有限公司 | A kind of pollution of vanadium place soil stabilization renovation agent and its methods for making and using same |
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