CN108609716A - A kind of method of the slow-release persulfate degradating chloro hydrocarbon of iron-charcoal optimization - Google Patents
A kind of method of the slow-release persulfate degradating chloro hydrocarbon of iron-charcoal optimization Download PDFInfo
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- CN108609716A CN108609716A CN201810507601.XA CN201810507601A CN108609716A CN 108609716 A CN108609716 A CN 108609716A CN 201810507601 A CN201810507601 A CN 201810507601A CN 108609716 A CN108609716 A CN 108609716A
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- persulfate
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- charcoal
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- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 title claims abstract description 71
- 239000003610 charcoal Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005457 optimization Methods 0.000 title claims abstract description 26
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 16
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 16
- -1 chloro hydrocarbon Chemical class 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 230000003647 oxidation Effects 0.000 claims description 23
- 238000007254 oxidation reaction Methods 0.000 claims description 23
- 239000004568 cement Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000004576 sand Substances 0.000 claims description 16
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical class CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000006004 Quartz sand Substances 0.000 claims description 9
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 7
- 244000060011 Cocos nucifera Species 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000007605 air drying Methods 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 2
- 239000012498 ultrapure water Substances 0.000 claims description 2
- 239000011398 Portland cement Substances 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 abstract description 16
- 230000001590 oxidative effect Effects 0.000 abstract description 13
- 239000000356 contaminant Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 abstract description 6
- 238000011065 in-situ storage Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000003673 groundwater Substances 0.000 abstract description 3
- 238000005067 remediation Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 13
- 230000015556 catabolic process Effects 0.000 description 11
- 238000006731 degradation reaction Methods 0.000 description 11
- 239000000126 substance Substances 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005183 environmental health Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 210000004994 reproductive system Anatomy 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
Abstract
The present invention relates to a kind of methods of the slow-release persulfate degradating chloro hydrocarbon of iron charcoal optimization, mainly belong to environment remediation technical field in conjunction with slow-release persulfate as chlorinated hydrocarbon contaminants present in oxidant removal underground water with iron carbon mixture；The method of the present invention is so that the underground water containing chlorinated hydrocarbon contaminants is reacted with the oxidant for mixing iron charcoal and slow-release persulfate in removal process, to achieve the purpose that handle chlorohydrocarbon.This method is advantageous in that：It is proposed iron charcoal optimization slow-release persulfate can into groundwater environment slow release oxidant, improve its utilization rate and chlorohydrocarbon removal efficiency, iron carbon mixture can further strengthen the removal effect of chlorohydrocarbon in underground water simultaneously, be suitable for chlorohydrocarbon polluted underground water in-situ immobilization system.
Description
Technical field
The present invention relates to environment remediation technical field, the slow-release persulfate degradation chlorine of specifically a kind of iron-charcoal optimization
For the method for hydrocarbon.
Background technology
Since the 1990s, Chinese society's economic development is swift and violent, and urbanization process is accelerated, and industry restructuring is deep
Change, cause land resource in short supply, people increasingly promote Environmental Health demand in addition, therefore many cities start to implement industry enterprise
Industry is closed or resettlement.The 2005-2013 in national environmental protection portion and Ministry of Land and Resources's joint publication《National soil pollution situation
Investigate bulletin》It has been shown that, in China, polluted enterprises land used and Industrial Wasteland have 36.3% and 34.9% to be contaminated respectively, work
Industry contaminated site has become the key constraints of soil redevelopment.Chlorinated hydrocarbon solvent (such as 1,1,1- trichloroethanes, trichlorine
Ethylene, four chlorination charcoals etc.) it is important industrial chemicals and organic solvent, during production, use, storage and disposition etc.
Improper operation causes it to become one of the organic pollution detected extensively in contaminated site underground water.Chlorohydrocarbon is largely difficult
Degradation organic compound has potential " three cause " effect (carcinogenic, teratogenesis, mutagenesis).Toxicology, animal and human experimentation table
Bright, chronic skin or breathing contact chlorinated solvent can generate negative effect to health under low concentration, influence liver, kidney, maincenter
The organs such as nerve, reproductive system.
In situ chemical oxidation (In-situ chemical oxidation, ISCO) refers to not moving Polluted Groundwater
Under the premise of soil, oxidant is directly injected at underground pollution source, removal pollutant of directly being degraded using oxidation
Or pollutant is converted into stability is strong, process of not easily shifted hypotoxicity substance.Under normal conditions, oxidant packet is commonly used
Include permanganate (MnO4 -), ozone (O3), hydrogen peroxide (H2O2) and persulfate (S2O8 2-) etc..Persulfate is as novel
Oxidant can ionize and generate over cure acid ion (S in water2O8 2-), there are peroxy (- O-O-) in molecule, and oxidation is also
Former current potential is 2.1V, is the stronger oxidant of a kind of oxidisability.It is abundant in view of its activated species, it is currently in contaminated site reparation
The oxidant being most widely used in the process.
The free radical that persulfate activation generates, can also be with other groups in underground environment other than being reacted with target contaminant
Divide reaction, reduces oxidation efficiency.Existing activation persulfate recovery technique reaction is too fast, the effective treatment range of Pollution Plume is narrow, repaiies
Underground water is acidified the extensive use that the reasons such as serious constrain the technology after multiple.Using slow release method, through different synthetic method systems
Relatively stablize in groundwater environment for the slow-release oxidating chemicals gone out, long half time, and specific pollutants, specific field can be directed to
Ground contamination feature sintetics can significantly improve underground water in situ chemical oxidation recovery technique.Iron-carbon mixture can be formed
Micro-electrolysis method is to utilize pollutant in the micro cell effect degradation aqueous solution of formation according to corrosion of metal electrochemical principle
Processing method.In recent years, micro electrolysis tech is paid more and more attention, especially in the processing of organic polluting water difficult to degrade application.
The validity and high efficiency for enhancing persulfate as a result, develop the release method of iron-charcoal optimization of persulfate to improve to dirt
The degradation efficiency for contaminating object is research emphasis.
Invention content
The purpose of the present invention is to provide a kind of method of the slow-release persulfate degradating chloro hydrocarbon of iron-charcoal optimization, with
Solve the problems mentioned above in the background art.
To achieve the above object, the present invention provides the following technical solutions：
A kind of method of the slow-release persulfate degradating chloro hydrocarbon of iron-charcoal optimization, using persulfate, cement, yellow sand
It is mixed according to a certain ratio with water, stirs evenly, be placed in cylinder mold and be molded, the natural wind in the case where being protected from light normal temperature condition
It is dry, after conserving 3~7 days, you can column slow-release persulfate oxidation agent is made, selects iron-carbon mixture material as an optimization,
It is alternately laminated to be placed in tubing string, it selects quartz sand as filled media, makes the subsurface flow that chlorohydrocarbon pollutes through tubing string, thus
Remove chlorohydrocarbon.
As a further solution of the present invention：The persulfate is that analysis is pure, and cement specification is P.O32.5 ordinary silicons
Acid salt cement, yellow sand grain size be 0.25~0.35mm, prepared using ultra-pure water, persulfate, cement, yellow sand and water mass ratio
It is 1~4：4：1：3.
As a further solution of the present invention：The slow-release persulfate oxidation agent is diameter 3.0cm, a height of
The cylinder of 2.0cm.
As a further solution of the present invention：The chlorohydrocarbon is trichloroethanes.
As a further solution of the present invention：Iron-the carbon mixture is 100 mesh reduced iron powders and 20~50 mesh coconut husks
The mixing of activated carbon.
As a further solution of the present invention：Iron-the carbon mixture is one layer, slow-release persulfate and quartz sand
Filler is one layer, and then alternately laminated is arranged in tubing string.
As a further solution of the present invention：Include the following steps：
(1) persulfate, cement, yellow sand and water mix according to a certain ratio, stir evenly；
(2) mixture that step (1) configures is filled into mold, mould inside shape is diameter 3.0cm, a height of 2.0cm
Cylinder, the natural air drying in the case where being protected from light normal temperature condition, after maintenance 3~7 days, you can column slow-release persulfate oxidation is made
Agent；
(3) 100 mesh reduced iron powders and 20~50 mesh cocoanut active charcoals are subjected to mixing stirring；
(4) mixture of the agent of slow-release persulfate oxidation and (3) configuration prepared by (2) lamination intersection is carried out to be positioned over
In tubing string, select quartz sand as filled media.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention using persulfate, cement, yellow sand, water and
The compound action of iron-charcoal, is made the slow-release persulfate oxidation agent of iron-charcoal optimization, and manufacturing process gradual change is of low cost.This
Inventing the slow-release persulfate oxidation agent of the iron-charcoal optimization proposed can slowly demonstrate persulfate for a long time, improve oxidant
Utilization ratio, overcome consumption of other substances to oxidant in underground environment, while iron-carbon mixture can improve pollution
The degradation effect of object effectively efficiently removes chlorinated hydrocarbon contaminants.
Specific implementation mode
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
The every other embodiment that art personnel are obtained without making creative work belongs to the model that the present invention protects
It encloses.
【Embodiment 1】
A kind of slow-release persulfate formula of iron-charcoal optimization：Persulfate 2.0g, cement 8.0g, yellow sand 2.0g, water
6.0g, iron and charcoal are 5g/L.
Persulfate 2.0g, cement 8.0g, yellow sand 2.0g, water 6.0g are mixed, stirs evenly, is filled into mold, mold
Interior shape be diameter 3.0cm, the cylinder of a height of 2.0cm, the natural air drying in the case where being protected from light normal temperature condition, maintenance 3~7 days after,
It can be prepared by column slow-release persulfate oxidation agent.Cocoanut active charcoal (20~50 mesh) and reduced iron powder (100 mesh) are mixed
Even stirring, iron and charcoal are 5g/L, and the iron of the slow-release persulfate oxidation agent of preparation and configuration-carbon mixture is carried out lamination
Intersection is positioned in tubing string, selects quartz sand as filled media to get the slow-release persulfate degradation chlorine optimized to iron-charcoal
For the method for hydrocarbon.
Under room temperature, the trichloroethanes solution of the 0.15mM configured is slow transitted through into the slow of iron obtained-charcoal optimization
Release type persulfate system, the removal rate of trichloroethanes reaches 57.3% after 12h, shows that oxidizer system obtained can be effective
Degradation trichloroethanes.
【Embodiment 2】
A kind of slow-release persulfate formula of iron-charcoal optimization：Persulfate 6.0g, cement 8.0g, yellow sand 2.0g, water
6.0g, iron and charcoal are 5g/L.
Persulfate 6.0g, cement 8.0g, yellow sand 2.0g, water 6.0g are mixed, stirs evenly, is filled into mold, mold
Interior shape be diameter 3.0cm, the cylinder of a height of 2.0cm, the natural air drying in the case where being protected from light normal temperature condition, maintenance 3~7 days after,
It can be prepared by column slow-release persulfate oxidation agent.Cocoanut active charcoal (20~50 mesh) and reduced iron powder (100 mesh) are mixed
Even stirring, iron and charcoal are 5g/L, and the iron of the slow-release persulfate oxidation agent of preparation and configuration-carbon mixture is carried out lamination
Intersection is positioned in tubing string, selects quartz sand as filled media to get the slow-release persulfate degradation chlorine optimized to iron-charcoal
For the method for hydrocarbon.
Under room temperature, the trichloroethanes solution of the 0.15mM configured is slow transitted through into the slow of iron obtained-charcoal optimization
Release type persulfate system, the removal rate of trichloroethanes reaches 82.4% after 12h, shows that oxidizer system obtained can be effective
Degradation trichloroethanes.
【Embodiment 3】
A kind of slow-release persulfate formula of iron-charcoal optimization：Persulfate 8.0g, cement 8.0g, yellow sand 2.0g, water
6.0g, iron and charcoal are 5g/L.
Persulfate 8.0g, cement 8.0g, yellow sand 2.0g, water 6.0g are mixed, stirs evenly, is filled into mold, mold
Interior shape be diameter 3.0cm, the cylinder of a height of 2.0cm, the natural air drying in the case where being protected from light normal temperature condition, maintenance 3~7 days after,
It can be prepared by column slow-release persulfate oxidation agent.Cocoanut active charcoal (20~50 mesh) and reduced iron powder (100 mesh) are mixed
Even stirring, iron and charcoal are 5g/L, and the iron of the slow-release persulfate oxidation agent of preparation and configuration-carbon mixture is carried out lamination
Intersection is positioned in tubing string, selects quartz sand as filled media to get the slow-release persulfate degradation chlorine optimized to iron-charcoal
For the method for hydrocarbon.
Under room temperature, the trichloroethanes solution of the 0.15mM configured is slow transitted through into the slow of iron obtained-charcoal optimization
Release type persulfate system, the removal rate of trichloroethanes reaches 99.6% after 12h, pH value of solution 9.92, persulfate concentration
11.51mM shows that oxidizer system obtained can effectively degrade trichloroethanes.
Chlorohydrocarbon solution will be added in the slow-release persulfate of obtained iron-charcoal optimization, target contaminant of degrading, not
With the variation of time piecewise analysis target pollutant concentration, persulfate concentration and pH value of solution, the oxidant found can be grown
Phase slowly discharges persulfate, can efficiently remove chlorinated hydrocarbon contaminants.
The sustained release of iron-charcoal optimization is made using the compound action of persulfate, cement, yellow sand, water and iron-charcoal in the present invention
Type persulfate oxidation agent.The present invention is advantageous in that：Manufacturing process is easy, of low cost；It can slowly demonstrate for a long time
Sulfate improves the utilization ratio of oxidant, overcomes consumption of other substances to oxidant in underground environment；Iron-charcoal simultaneously
Mixture can improve the degradation effect of pollutant, effectively efficiently remove chlorinated hydrocarbon contaminants.
The above are merely the preferred embodiment of the present invention, it is noted that for those skilled in the art, not
Under the premise of being detached from present inventive concept, several modifications and improvements can also be made, these should also be considered as the protection model of the present invention
It encloses, these all do not interfere with the effect and patent practicability that the present invention is implemented.
Claims (7)
1. a kind of iron-method of the slow-release persulfate degradating chloro hydrocarbon of charcoal optimization, which is characterized in that using persulfate,
Cement, yellow sand and water mix according to a certain ratio, stir evenly, and are placed in cylinder mold and are molded, and are being protected from light normal temperature condition
Lower natural air drying, after conserving 3~7 days, you can column slow-release persulfate oxidation agent is made, selects iron-carbon mixture conduct
Optimize material, it is alternately laminated to be placed in tubing string, select quartz sand as filled media, the subsurface flow warp for making chlorohydrocarbon pollute
Tubing string, to remove chlorohydrocarbon.
2. the method for the slow-release persulfate degradating chloro hydrocarbon of iron according to claim 1-charcoal optimization, feature exist
It is to analyze pure in, the persulfate, cement specification is P.O32.5 Portland cements, yellow sand grain size is 0.25~
0.35mm is prepared using ultra-pure water, persulfate, cement, yellow sand and water mass ratio be 1~4：4：1：3.
3. the method for the slow-release persulfate degradating chloro hydrocarbon of iron according to claim 1-charcoal optimization, feature exist
In the slow-release persulfate oxidation agent is diameter 3.0cm, the cylinder of a height of 2.0cm.
4. the method for the slow-release persulfate degradating chloro hydrocarbon of iron according to claim 1-charcoal optimization, feature exist
In the chlorohydrocarbon is trichloroethanes.
5. the method for the slow-release persulfate degradating chloro hydrocarbon of iron according to claim 1-charcoal optimization, feature exist
In the iron-carbon mixture is the mixing of 100 mesh reduced iron powders and 20~50 mesh cocoanut active charcoals.
6. the method for the slow-release persulfate degradating chloro hydrocarbon of iron-charcoal optimization according to claim 1 or 5, feature
It is, the iron-carbon mixture is one layer, and slow-release persulfate is one layer with quartz sand filler, and then alternating layer laying up
It is placed in tubing string.
7. according to the method for the slow-release persulfate degradating chloro hydrocarbon of claim 1-6 any one of them iron-charcoal optimization,
It is characterized in that, includes the following steps：
(1) persulfate, cement, yellow sand and water mix according to a certain ratio, stir evenly；
(2) mixture that step (1) configures is filled into mold, mould inside shape is diameter 3.0cm, the circle of a height of 2.0cm
Cylinder, the natural air drying in the case where being protected from light normal temperature condition, after conserving 3~7 days, you can column slow-release persulfate oxidation agent is made；
(3) 100 mesh reduced iron powders and 20~50 mesh cocoanut active charcoals are subjected to mixing stirring；
(4) mixture of the agent of slow-release persulfate oxidation and (3) configuration prepared by (2) is subjected to lamination intersection and is positioned over tubing string
In, select quartz sand as filled media.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942072A (en) * | 2019-04-23 | 2019-06-28 | 天津华勘环保科技有限公司 | A kind of method of natural polyphenol activation persulfate degradating chloro hydrocarbon |
| CN111777186A (en) * | 2020-07-10 | 2020-10-16 | 北京伦至环境科技有限公司 | Anti-blocking zero-valent iron coupling response type slow-release persulfate two-stage permeable reaction wall device and application |
| CN112387772A (en) * | 2020-10-14 | 2021-02-23 | 南京格洛特环境工程股份有限公司 | Method for repairing chlorohydrocarbon polluted site by in-situ chemical oxidation |
| CN114229947A (en) * | 2021-12-28 | 2022-03-25 | 北京建工环境修复股份有限公司 | Composite sustained-release material and preparation method and application thereof |
| CN116354487A (en) * | 2023-03-30 | 2023-06-30 | 长安大学 | Double-coating persulfate slow-release material and preparation method and application thereof |
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