CN110387242A - A kind of potassium permanganate sustained-release agent and its preparation method and application - Google Patents
A kind of potassium permanganate sustained-release agent and its preparation method and application Download PDFInfo
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- CN110387242A CN110387242A CN201910569638.XA CN201910569638A CN110387242A CN 110387242 A CN110387242 A CN 110387242A CN 201910569638 A CN201910569638 A CN 201910569638A CN 110387242 A CN110387242 A CN 110387242A
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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
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
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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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention discloses a kind of potassium permanganate sustained-release agents, are in terms of 100% by total mass of raw material, raw material composition includes: paraffin 30%~50%, quartz sand 30%~50%, active carbon 5%~20%, potassium permanganate 5%~10%.The invention also discloses the preparation methods of the potassium permanganate sustained-release agent described in one kind, comprising steps of (1) paraffin is added in the mixed liquor of dehydrated alcohol and polyethylene glycol, are heated to 60~80 DEG C, stirring is until paraffin melts completely；(2) surfactant, quartz sand, active carbon powder and potassium permanganate is successively added into step (1) acquired solution under stiring；(3) the molten state material for obtaining step (2) is cooling up to the potassium permanganate sustained-release agent.The invention also discloses the potassium permanganate sustained-release agents described in one kind to repair by the application in volatile organic contaminant contaminated soil and underground water.The potassium permanganate sustained-release agent covered effect is good, rate of release is low, has excellent permeability and adsorptivity, has mixing and absorption characteristic.
Description
Technical field
The present invention relates to soil and groudwater remediation technical fields, and in particular to a kind of potassium permanganate sustained-release agent and its preparation
Methods and applications.
Background technique
Underground water is the important component of water resource, and significance is to serve as Drinking Water for Residents, ensures that agricultural is used
Water supports socio-economic development and the maintenance ecological balance etc..But soil and groundwater pollution is got worse, wherein volatility has
Machine contaminants are even more the key problem for being difficult to capture.Underground water pollution usually comes at soil pollution, similarly, soil
Pollution is also the important sources of underground water pollution.Soil pollution can be used as the pollution sources of underground water pollution, especially containing not
It is dissolved in the soil of the organic matter of water, can endlessly release harmful substance.So natural environment is difficult to degrade, simultaneously
Simple pump-and-treat system cannot reach ideal effect.Therefore, treating groundwater pollutes, it is necessary in conjunction with the characteristics of soil pollution,
Accomplish treating both manifestation and root cause of disease.
Organic pollutant can be accumulated in the soil, slowly discharge into underground water, it is difficult to thoroughly repair；Some organic contaminations
Object, such as heavy phase nonaqueous phase liquid (DNAPL), density ratio water is big, is practically insoluble in water, the low but strong toxicity of concentration, this gives underground
The reparation of water brings huge challenge.Relative to traditional time-consuming and laborious showering technology, based technique for in-situ remediation is close
Become popular over a little years, specifically there is in-situ oxidation technology, in-situ reducing technology etc..Wherein in situ chemical oxidation technology possesses effect
Well, it does not rebound, is cheap, be easy to launch, do not generate the advantages of harmful side product, purposes is more extensive.But due to underground
The characteristics of the characteristics of water itself and groundwater pollutant, in-situ immobilization are also faced with many problems and challenge.With potassium permanganate
(KMnO4) be developed in this background as the technology of groundwater remediation agent in-situ immobilization.But previous potassium permanganate is all
Water-bearing layer is injected in liquid form, and rate of release is fast, non-selectivity, and there are the blockage problem of reaction product manganese dioxide, institutes
It is very low with oxidizing efficiency, and contaminated site is easy rebound.
Sustained release agent technology based on control release technic is gradually developed.Controlled release material is based on original
Position chemical remediation technology and control release technic prepare molding groundwater remediation material.By control release technic, Wo Menke
With by KMnO4Cladding in the carrier, controls its rate of release, achievees the purpose that long-term repair, positioning are repaired；Meanwhile it discharging
Concentration is low, and actual efficiency is promoted, without secondary pollution, easy to operate in actual place, is easy to transport.The ideal effect of sustained release agent
Fruit is fine, but in actually preparation and theoretical performance test, there is also some problems: such as release concentration instability problem, infiltration
Property problem, by-product blockage problem, adsorptivity problem etc..
Summary of the invention
For shortcoming existing for this field, the present invention provides a kind of potassium permanganate sustained-release agents, are with potassium permanganate
Primary oxidizers, paraffin is carrier, while quartz sand and active carbon is added, and enhances permeability and adsorptivity.The permanganic acid
Potassium sustained release agent covered effect is good, rate of release is low, has excellent permeability and adsorptivity, has mixing and absorption characteristic, can be used for repairing
Again by volatile organic contaminant contaminated soil and underground water.
A kind of potassium permanganate sustained-release agent is in terms of 100% by total mass of raw material, and raw material composition includes:
The potassium permanganate sustained-release agent selects paraffin, quartz sand, active carbon as mixed carrier, in which: paraffin has
Good adhesiveness, it is not soluble in water, it is environment-friendly materials；Quartz sand has good permeability, is green material；Active carbon
The adsorptivity of sustained release agent can be increased, it is environmentally protective.It can be played when paraffin, quartz sand, active carbon are as mixed carrier significant
Synergistic effect, effectively increases covered effect, permeability and the adsorptivity of sustained release agent.
Preferably, the mass ratio of the potassium permanganate and active carbon is 1:1~2, further preferably 1:1.Activity
The additive amount and sustained release agent rate of release of charcoal are positively correlated, but burst size is not meant to remediation efficiency, and concentration may cause greatly
The inefficiency of oxidant.So the adding proportion of control active carbon can get optimum efficiency.
The present invention also provides the preparation methods of the potassium permanganate sustained-release agent described in one kind, are based on microcapsules technology, use
Fusing condensation dispersion method, comprising steps of
(1) paraffin is added in the mixed liquor of dehydrated alcohol and polyethylene glycol, is heated to 60~80 DEG C, stirring is until paraffin
Melt completely；
(2) under stiring successively into step (1) acquired solution be added surfactant, quartz sand, active carbon powder and
Potassium permanganate；
(3) the molten state material for obtaining step (2) is cooling up to the potassium permanganate sustained-release agent.
Since the fusion temperature range of paraffin is 58~60 DEG C, so paraffin controls system temperature when dissolving in step (1)
It is 60~80 DEG C, paraffin can be made to melt completely.Preferably, being heated to 70~75 DEG C in step (1), it is more advantageous to step (3)
Subsequent cooling is convenient in the transfer of middle molten state material.
In step (1), the dehydrated alcohol and polyethylene glycol are dissolution aids, auxiliary paraffin dissolution.Preferably, institute
The mass ratio of the dehydrated alcohol and polyethylene glycol stated is 1~20:1.
Preferably, the molecular weight of the polyethylene glycol is 4000.
In step (1), (2), the revolving speed of the stirring is 100~200rpm, and stirring total time is 5~30min.
In step (2), preferably, the surfactant is polyethylene glycol-4000, at least one in sorbester p17
Kind, play emulsification.The polyethylene glycol-4000 is the polyethylene glycol that molecular weight is 4000.
Preferably, the mass ratio of polyethylene glycol is 0.01~0.2:1 in the surfactant and step (1).
The sustained release agent of melting is in flow regime before the forming, once cooling paraffin will compared with quick setting, setting time compared with
It is few.In step (3), in order to make cooling obtained potassium permanganate sustained-release agent that there is fixed geomery, step (2) can be obtained
Molten state material pour into mold and cooled down.
The specific size of the mold can be 1.0cm × 1.0cm × 1.0cm.
The principle of above-mentioned preparation method is: being based on control release technic and microcapsules technology, utilizes fusing condensation dispersion
Method is by oxidant KMnO4It is dispersed in paraffin, quartz sand, active carbon etc. as in the molten state liquid of carrier, addition is anhydrous
The reagents such as ethyl alcohol, sorbester p17 assistant carrier and oxidant, which are uniformly mixed, to be stablized, then pours into mold while hot after being stirred by ultrasonic, cooling
Solid particle is formed after drying, to achieve the purpose that sustained release.
It is polluted in reparation by volatile organic contaminant the present invention also provides the potassium permanganate sustained-release agent described in one kind
Application in soil and groundwater.
Potassium permanganate has universality to the oxidation of volatile organic contaminant.Consider from removal effect, as
It is preferred that the volatile organic contaminant is trichloro ethylene (TCE).
Compared with prior art, the present invention major advantage includes:
(1) for potassium permanganate sustained-release agent of the invention using potassium permanganate as primary oxidizers, paraffin is carrier, while stone is added
Sand and active carbon in the case where ensure that the function that sustained release is repaired while enhancing permeability and adsorptivity, reducing repair process
In by-product blockage problem.The potassium permanganate sustained-release agent covered effect is good, rate of release is low, has excellent permeability and suction
Attached property has mixing and absorption characteristic, can be used for repairing by volatile organic contaminant contaminated soil and underground water.
(2) preparation method of potassium permanganate sustained-release agent of the invention is based on control release technic and microcapsules technology, utilizes
Fusing condenses dispersion method for oxidant KMnO4It is dispersed in the molten state liquid with paraffin, quartz sand, active carbon etc. for carrier
In, the reagents assistant carriers such as dehydrated alcohol, sorbester p17 are added and oxidant is uniformly mixed and stablizes, then are fallen while hot after being stirred by ultrasonic
Enter mold, solid particle is formed after cooling drying, to achieve the purpose that sustained release.
(3) rate of release is substantially reduced potassium permanganate sustained-release agent of the invention in water, and permeability enhancing, adsorptivity increases
By force；Meanwhile deenergized period is elongated, sustained release agent rate of release is relatively stable, especially such as to intractable heavy phase organic pollutant
TCE has good treatment effect.
Detailed description of the invention
Fig. 1 is the photo in kind of the sustained release agent of embodiment 1；
Fig. 2 is the sustained release agent static release potassium permanganate concentration changes with time figure of embodiment 1；
Fig. 3 is the sustained release agent response situation photo in water and trichloro ethylene solution respectively of embodiment 1；Wherein, figure a is
The photo of static release initial time in water, figure b are the photo of the reaction initial time in trichloro ethylene solution, and figure c is in water
The photo of static release 1h, figure d are the photo that 1h is reacted in trichloro ethylene solution；
Fig. 4 is trichloro ethylene concentration changes with time figure in the sustained release agent static state reparative experiment of embodiment 1；
Fig. 5 is in potassium permanganate concentration and control experiment and reparative experiment in the dynamic release experiment of embodiment 1
Trichloro ethylene concentration changes with time figure；
Fig. 6 is that the different activities charcoal ratio sustained release agent static state of test case 1 repairs two hours trichloro ethylene concentration variation diagrams；
Fig. 7 is that the different carriers sustained release agent static state of test case 2 repairs two hours trichloro ethylene concentration variation diagrams.
Specific embodiment
With reference to the accompanying drawing and specific embodiment, the present invention is further explained.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.The operating method of actual conditions is not specified in the following example, usually according to
Normal condition, or according to the normal condition proposed by manufacturer.
Embodiment 1
It the use of sustained release agent is KMnO4, paraffin, quartz sand and quality of activated carbon be than the mixing and absorption sustained release for 2:10:10:2
Agent.
(1) preparation of sustained release agent
Based on microcapsules technology, dispersion method is condensed using fusing, prepares sustained release agent.It takes the paraffin of 10g in conical flask, adds
Enter 20mL dehydrated alcohol, heating water bath is to 75 DEG C；Melt completely to paraffin, 1g polyethylene glycol-4000 and 1 drop Arlacel-80 be added,
It is sufficiently stirred；10g quartz sand, 2g active carbon and 2g potassium permanganate powder are sequentially added by the mass ratio of 2:10:10:2, is stirred
Keep its evenly dispersed；Pouring into ready specification while hot is in 1.0cm × 1.0cm × 1.0cm mold；After supercooling is dry
Square figure solid potassium permanganate sustained release agent can be obtained.
Fig. 1 is KMnO4, paraffin, quartz sand and quality of activated carbon than the mixing and absorption sustained release agent for 2:10:10:2 material object
Photo.
(2) sustained release agent static release
The principle of static release experiment is that (water environment is organic by allowing different sustained release agents to be under identical liquid environment
Solution environmental), allow oxidant KMnO in sustained release agent4Release, but do not react.Within the regular hour, setting time point
It is sampled, with the KMnO of UV detector measurement different time4Concentration.
The Solid Releasing Fresh-keeping Agent of 2.0g or so is taken to be placed in the beaker of 100mL；100mL water is added, starts timing；Timing respectively
Sample of quantitative is placed in 10mL colorimetric cylinder, is recorded label (adding blank sample)；Permanganic acid is measured at spectrophotometer 530nm
Potassium absorbance；Its concentration is calculated, line chart is drawn.Sustained release agent static release potassium permanganate concentration changes with time is as shown in Figure 2.
Because paraffin is not soluble in water, it is dissolved in organic solvent.Therefore the trichloro ethylene aqueous solution for choosing water and 80mg/L carries out pair
Than test, its variation is observed.As shown in figure 3, qualitative experiment the result shows that: sustained release agent discharges comparatively fast in trichloro ethylene solution,
Reaction effect is preferable, meets expection, may be repaired experiment.
(3) sustained release agent static state reparation
Static reparative experiment is simulated, selection is representative three chloroethene of underground water volatile organic contaminant containing chlorine
Alkene.The reasons are as follows: 1) trichloro ethylene density ratio water is big, is heavy phase nonaqueous phase liquid (DNAPL)；2) in underground water pollution
In, TCE is common contaminant；3) trichloro ethylene energy and KMnO4Fast reaction, realization effectively remove.KMnO is just selected in this experiment4
It handles the simulated groundwater of the micro- pollution of trichloro ethylene, is timed sampling and measuring.
KMnO4The treatment effect for aoxidizing trichloro ethylene is preferable.Reaction equation is as follows:
2KMnO4+C2HCl3→2CO2+2MnO2+2K++H++3Cl-
This reaction can comparatively fast occur, and be conducive to contaminant degradation.
Since trichloro ethylene has stronger volatility, and concentration is low, chooses Headspace-Gas Chromatography Analysis and measures trichloro ethylene.
Unreacted KMnO is removed using excessive saturation sodium hydrogensulfite when being measured by sampling4, as reaction terminating agent.
Low concentration trichloro ethylene is prepared, contaminant water is served as；It takes 1.5g sustained release agent to be determined to be placed in reactor, is added
500mL contaminant water, trichloro ethylene content are 80mg/L；It is primary every 10min sampling, 1mL is taken every time, samples 1h, then be spaced
30min is sampled 2 times, is placed in the ml headspace bottle for filling 1mL saturation solution of sodium bisulfite, is added 3mL pure water, sealed with sealer；
With trichloro ethylene concentration in Headspace Gas Chromatography sample, and concentration changes with time curve is drawn, as a result such as Fig. 4 institute
Show.
(4) dynamic release and reparation
Dynamic experiment is mainly the media environment of simulated groundwater, flow velocity, carries out one-dimensional sand column experiments.In such case
Under, polluted underground water is repaired with mixing and absorption sustained release agent, observes its repairing effect.This experiment in one-dimensional sand column into
Row.It the use of sustained release agent is KMnO4, paraffin, quartz sand and quality of activated carbon be than the mixing and absorption sustained release agent for 2:10:10:2.
Media environment, the flow velocity of simulated groundwater carry out one-dimensional sand column experiments.Experiment parameter simulated groundwater environment is set
It sets.The infiltration coefficient for testing column medium is 1.5cm/s；Water velocity is set as 2mL/min；The diameter for testing column is R=
5.0cm；Experiment column length is L=18cm, and wherein sustained release agent accounting length is l1=3.0cm, front buffer medium accounting l2=
2.5cm, real medium accounting l3=10.0cm, rear portion buffer medium accounting l4=2.5cm.
One-dimensional sand column is filled, and water (or contaminant water) in one-dimensional sand column is allowed to be saturated (200mL)；In one-dimensional sand column water inlet
Put 1.5g potassium permanganate sustained-release agent；Connect one-dimensional sand column, sink and peristaltic pump；Start peristaltic pump；With the flow velocity of 2.0mL/min,
It is pumped into water；Sample time is 10,20,30,40,50,60,90,120,150,180,240,300min after starting peristaltic pump, sampling
12 times；Measure the potassium permanganate concentration (or trichloro ethylene concentration) of 12 water samples；Draw trichloro ethylene concentration curve.
Dynamic release experiment: allowing water saturation in the experiment column after populated medium, is added in one-dimensional sand column water inlet
1.5g mixing and absorption sustained release agent.It allows water in system to be liquor potassic permanganate, measures its concentration changes with time.
Control experiment: allowing trichloro ethylene pollution water saturation in the experiment column after populated medium, initial concentration 80mg/L.
Sustained release agent is not added, the aquametry connect with water outlet is only tested trichloro ethylene concentration in column under the action of water flow and become at any time
Change.
Reparative experiment: make experiment column medium interior full of trichloro ethylene contaminant water, initial concentration 80mg/L.Enter in experiment column
1.5g mixing and absorption sustained release agent is added at the mouth of a river.Peristaltic pump and experiment column are connected, peristaltic pump is opened and carries out dynamic restoring experiment.
Dynamic release experiment in potassium permanganate concentration and control experiment and reparative experiment in trichloro ethylene concentration with
Time change is as shown in Figure 5.
Embodiment 2
It the use of sustained release agent is KMnO4, paraffin, quartz sand and quality of activated carbon be than the mixing and absorption sustained release for 2:10:10:3
Agent.
The preparation of sustained release agent:
Based on microcapsules technology, dispersion method is condensed using fusing, prepares sustained release agent.It takes the paraffin of 10g in conical flask, adds
Enter 20mL dehydrated alcohol, heating water bath is to 75 DEG C；Melt completely to paraffin, 1g polyethylene glycol-4000 and 1 drop Arlacel-80 be added,
It is sufficiently stirred；10g quartz sand, 3g active carbon and 2g potassium permanganate powder are sequentially added by the mass ratio of 2:10:10:3, is stirred
Keep its evenly dispersed；Pouring into ready specification while hot is in 1.0cm × 1.0cm × 1.0cm mold；After supercooling is dry
Square figure solid potassium permanganate sustained release agent can be obtained.
Embodiment 3
It the use of sustained release agent is KMnO4, paraffin, quartz sand and quality of activated carbon be than the mixing and absorption sustained release for 2:10:10:4
Agent.
The preparation of sustained release agent:
Based on microcapsules technology, dispersion method is condensed using fusing, prepares sustained release agent.It takes the paraffin of 10g in conical flask, adds
Enter 20mL dehydrated alcohol, heating water bath is to 75 DEG C；Melt completely to paraffin, 1g polyethylene glycol-4000 and 1 drop Arlacel-80 be added,
It is sufficiently stirred；10g quartz sand, 4g active carbon and 2g potassium permanganate powder are sequentially added in the ratio of 2:10:10:4, stirring makes it
It is evenly dispersed；Pouring into ready specification while hot is in 1.0cm × 1.0cm × 1.0cm mold；After supercooling is dry
Obtain square figure solid potassium permanganate sustained release agent.
Test case 1
For influence of the additive amount to sustained release agent effect of Study On The Activated Carbon, choose 3 kinds of sustained release agents of Examples 1 to 3 into
Row static state reparative experiment, the results are shown in Table 1.
1 different activities charcoal ratio sustained release agent static state of table repairs trichloro ethylene concentration variation (mg/L) in two hours
Different activities charcoal ratio sustained release agent static state, which is obtained, by above-mentioned data repairs two hours trichloro ethylene variation diagrams such as Fig. 6 institute
Show.As it can be seen that activated carbon addition is more, sustained release agent rate of release is bigger, but burst size is not meant to remediation efficiency, and concentration is big
It may cause the inefficiency of oxidant.So needing to control the adding proportion of active carbon to obtain optimum efficiency.
Comparative example 1
It the use of sustained release agent is KMnO4, Quality of Paraffin Waxes is than the mixing and absorption sustained release agent for 5:15.
The preparation of sustained release agent:
Based on microcapsules technology, dispersion method is condensed using fusing, prepares sustained release agent.It takes the paraffin of 15g in conical flask, adds
Enter 20mL dehydrated alcohol, heating water bath is to 75 DEG C；Melt completely to paraffin, 1g polyethylene glycol-4000 and 1 drop Arlacel-80 be added,
It is sufficiently stirred；5g potassium permanganate powder is added in the ratio of 5:15, stirring keeps its evenly dispersed；Ready specification is poured into while hot
For in 1.0cm × 1.0cm × 1.0cm mold；Square figure solid potassium permanganate sustained release can be obtained after supercooling is dry
Agent.
Comparative example 2
It the use of sustained release agent is KMnO4, paraffin, quartz sand mass ratio be 5:10:10 mixing and absorption sustained release agent.
The preparation of sustained release agent:
Based on microcapsules technology, dispersion method is condensed using fusing, prepares sustained release agent.It takes the paraffin of 10g in conical flask, adds
Enter 20mL dehydrated alcohol, heating water bath is to 75 DEG C；Melt completely to paraffin, 1g polyethylene glycol-4000 and 1 drop Arlacel-80 be added,
It is sufficiently stirred；10g quartz sand and 5g potassium permanganate powder are sequentially added in the ratio of 5:10:10, stirring keeps its evenly dispersed；It takes advantage of
It is in 1.0cm × 1.0cm × 1.0cm mold that heat, which pours into ready specification,；Square can be obtained after supercooling is dry
Type solid potassium permanganate sustained release agent.
Test case 2
In order to study influence of the different carriers to sustained release agent effect, 3 kinds of sustained release agents of embodiment 2, comparative example 1~2 are chosen
Static reparative experiment is carried out, the results are shown in Table 2.
2 different carriers sustained release agent static state of table repairs trichloro ethylene concentration variation (mg/L) in two hours
Different carriers sustained release agent static state is obtained by above-mentioned data and repairs trichloro ethylene variation in two hours as shown in Figure 7, wherein real
The sustained release agent for applying example 2 is denoted as active carbon sustained release agent, and label is in figure；The sustained release agent of comparative example 2 is denoted as quartz sand sustained release
Agent, label is in figure；The sustained release agent of comparative example 1 is denoted as paraffin sustained release agent, and label is in figure.
As it can be seen that the size of two hours removal rates are as follows: active carbon sustained release agent (94.19%) > quartz sand sustained release agent (93.24%)
> paraffin sustained release agent (84.20%).The two hours repairing effects of sustained release agent for adding active carbon are best.Add the sustained release agent of active carbon
Repairing effect it is more steady, and final removal rate is minimum；The sustained release agent removal rate of addition quartz sand looks well, still
Its release is too fast, and fluctuation is bigger, does not meet the theory of ideal sustained release agent, in an experiment, it can be seen that it is always discharged quickly.Stone
Wax sustained release agent is due to poor permeability, so rate of release is slower, discharges nor very gentle, this distribution with its oxidant is not
It is related.All in all, static repair of active carbon sustained release agent is behaved oneself best.
In addition, it should also be understood that, those skilled in the art can be to this hair after having read foregoing description content of the invention
Bright to make various changes or modifications, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (10)
1. a kind of potassium permanganate sustained-release agent, which is characterized in that being that raw material forms in terms of 100% by total mass of raw material includes:
2. the preparation method of potassium permanganate sustained-release agent according to claim 1, which is characterized in that comprising steps of
(1) paraffin is added in the mixed liquor of dehydrated alcohol and polyethylene glycol, is heated to 60~80 DEG C, stirring is until paraffin is complete
Melt；
(2) surfactant, quartz sand, active carbon powder and Gao Meng is successively added into step (1) acquired solution under stiring
Sour potassium；
(3) the molten state material for obtaining step (2) is cooling up to the potassium permanganate sustained-release agent.
3. the preparation method of potassium permanganate sustained-release agent according to claim 2, which is characterized in that step is heated in (1)
70~75 DEG C.
4. the preparation method of potassium permanganate sustained-release agent according to claim 2, which is characterized in that described in step (1)
The mass ratio of dehydrated alcohol and polyethylene glycol is 1~20:1.
5. the preparation method of potassium permanganate sustained-release agent according to claim 2, which is characterized in that the polyethylene glycol
Molecular weight is 4000.
6. the preparation method of potassium permanganate sustained-release agent according to claim 2, which is characterized in that in step (1), (2), institute
The revolving speed for stating stirring is 100~200rpm, and stirring total time is 5~30min.
7. the preparation method of potassium permanganate sustained-release agent according to claim 2, which is characterized in that described in step (2)
Surfactant is selected from least one of polyethylene glycol-4000, sorbester p17；
The mass ratio of polyethylene glycol is 0.01~0.2:1 in the surfactant and step (1).
8. the preparation method of potassium permanganate sustained-release agent according to claim 2, which is characterized in that in step (3), by step
(2) the molten state material obtained, which pours into mold, to be cooled down, and the potassium permanganate sustained-release agent is obtained.
9. a kind of potassium permanganate sustained-release agent according to claim 1 is being repaired by volatile organic contaminant contaminated soil
With the application in underground water.
10. potassium permanganate sustained-release agent according to claim 9 repairing by volatile organic contaminant contaminated soil and
Application in underground water, which is characterized in that the volatile organic contaminant is trichloro ethylene.
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