CN108865153A - A kind of calper calcium peroxide capsule of nano soil-repairing agent and its preparation method and application - Google Patents
A kind of calper calcium peroxide capsule of nano soil-repairing agent and its preparation method and application Download PDFInfo
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- CN108865153A CN108865153A CN201810353826.4A CN201810353826A CN108865153A CN 108865153 A CN108865153 A CN 108865153A CN 201810353826 A CN201810353826 A CN 201810353826A CN 108865153 A CN108865153 A CN 108865153A
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- calcium peroxide
- calper calcium
- humic acid
- chitosan
- soil
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- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 235000019402 calcium peroxide Nutrition 0.000 title claims abstract description 44
- 239000004343 Calcium peroxide Substances 0.000 title claims abstract description 43
- 239000002775 capsule Substances 0.000 title claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 33
- 239000004021 humic acid Substances 0.000 claims abstract description 31
- 229920001661 Chitosan Polymers 0.000 claims abstract description 30
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 19
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011575 calcium Substances 0.000 claims abstract description 15
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 15
- 239000002114 nanocomposite Substances 0.000 claims abstract description 14
- 230000015556 catabolic process Effects 0.000 claims abstract description 10
- 238000006731 degradation reaction Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000003094 microcapsule Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 3
- 239000001110 calcium chloride Substances 0.000 claims abstract description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 3
- 239000002689 soil Substances 0.000 claims description 48
- 239000000243 solution Substances 0.000 claims description 23
- 239000011259 mixed solution Substances 0.000 claims description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 10
- 229960002415 trichloroethylene Drugs 0.000 claims description 10
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims description 10
- 239000003209 petroleum derivative Substances 0.000 claims description 8
- 229960000583 acetic acid Drugs 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000003643 water by type Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 239000012362 glacial acetic acid Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000012452 mother liquor Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 238000000975 co-precipitation Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 150000002978 peroxides Chemical class 0.000 claims 2
- 150000004676 glycans Chemical class 0.000 claims 1
- 238000007873 sieving Methods 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000009418 renovation Methods 0.000 abstract description 9
- 238000005067 remediation Methods 0.000 abstract description 7
- 238000011109 contamination Methods 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 206010011732 Cyst Diseases 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 208000031513 cyst Diseases 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 12
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 6
- 239000002957 persistent organic pollutant Substances 0.000 description 5
- 235000013399 edible fruits Nutrition 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000012046 mixed solvent Substances 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- -1 hydroxyl radical free radical Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Cosmetics (AREA)
Abstract
The invention discloses a kind of calper calcium peroxide capsule of nano soil-repairing agents, belong to organic contamination place chemical remediation field, and including calper calcium peroxide, humic acid, chitosan, the calper calcium peroxide is by CaCl2、H2O2, NaOH and ammonium hydroxide preparation gained, the calper calcium peroxide is 5 ~ 9 parts, humic acid is 1 part, chitosan is 5 ~ 10 parts, calper calcium peroxide-humic acid nanocomposite partial size is 100 ~ 200nm, and the preparation method in the present invention is to advanced optimize on the prior art to the degradation property, absorption property and dispersion performance of renovation agent, can a step fabricated in situ based on calper calcium peroxide-humic acid nanocomposite microcapsules renovation agent, cyst material used is environmental-friendly natural organic matter chitosan.Present invention process is simple, easy to operate, and reaction is mild, low energy consumption, and no bazardous waste generates.
Description
Technical field
The invention belongs to organic contamination place chemical remediation fields, and in particular to a kind of calper calcium peroxide capsule of nano soil
Renovation agent and its preparation method and application.
Background technique
With the quickening of Urbanization Process In China, the enterprises such as bulk petroleum, chemical industry, coking move from city and shift,
It forms a large amount of industry and leaves organic contamination place.Since organic pollutant has the characteristics that high toxicity, easily diffusion, these
Organic contamination place seriously threatens the recycling in environmental aspect around, the health of resident and soil, there is an urgent need to
Measure rapidly and efficiently is taken to administer.In the method for removal soil organic pollutant, in situ chemical oxidation method is repaired because having
Multiple cost is relatively low, repairs the advantages that quick, easy to operate is widely used.However, traditional soil-repairing agent is to organic
The degradation efficiency of pollutant is unsatisfactory, and influences greatly, to easily cause secondary pollution to soil nutrient, physicochemical property.
Calper calcium peroxide is a kind of environmentally friendly material for having both and releasing and nourishing one's nature with oxidisability, is reacted in soil environment with water
Molecular oxygen and hydrogen peroxide are discharged, hydrogen peroxide can be catalyzed by the iron mineral in soil and generate hydroxyl radical free radical, and then degradation has
Machine pollutant.Therefore calper calcium peroxide is compared with traditional soil-repairing agent, adapt to the range of pH it is relatively wide, itself and its be reduced
Product is nontoxic, half-life short, is a kind of oxidant for being very suitable for organic polluted soil chemical remediation.
Humic acid is a kind of high molecular polymer for being widely present in nature, is the main body of the soil organism, contains carboxylic
Organic pollutant can be adsorbed by hydrophobic effect, ligand exchange and hydrogen bond action in the various actives such as acidic group, phenolic hydroxyl group functional group,
There is certain degradation capability to the organic pollutant of absorption simultaneously.Therefore humic acid for soil organic pollutant removal,
The holding of soil nutrient is of great significance, and is with a wide range of applications in organic contamination place chemical remediation field.
The purpose for preparing microcapsules is following reason.First, so that core material is kept good dispersity and in the soil
Transfer ability.Second, active principle is discharged as needed.Third improves renovation agent microscopic appearance and property to a certain extent
Energy.In recent years, microcapsules technology continues to develop, since its unique performance is widely used in many necks such as environmental protection, pesticide, medicine
Domain, especially in soil remediation industry, the potentiality of microcapsules technology constantly show.
The invention discloses a kind of calper calcium peroxide capsule of nano soil-repairing agents, by the nanoscale mistake with strong oxidizing property
Calcium oxide particle, which is uniformly embedded in inside the humic acid with adsorptivity, prepares calper calcium peroxide-humic acid nanocomposite,
Using calper calcium peroxide-humic acid nanocomposite as core material, chitosan is wall material, and it is micro- to successfully synthesize a kind of calper calcium peroxide nanometer
Capsule soil-repairing agent；The renovation agent remains the strong oxidizing property of calper calcium peroxide and the adsorptivity of humic acid, improves organic dirt
Contaminate the degradation efficiency of object；The renovation agent can solve that traditional calper calcium peroxide remediation efficiency is low, partial size is too big, is not easy in soil environment
Disperse and to the biggish defect of Effect of soil nutrient.
Summary of the invention
Technical assignment of the invention is to provide a kind of calper calcium peroxide capsule of nano soil for the above the deficiencies in the prior art
Earth renovation agent and its preparation method and application.
The technical solution adopted by the present invention to solve the technical problems is：A kind of calper calcium peroxide capsule of nano soil remediation
Agent and its preparation method and application, including calper calcium peroxide, humic acid, chitosan, the calper calcium peroxide is by CaCl2、H2O2、
NaOH and ammonium hydroxide preparation gained, the calper calcium peroxide are 5 ~ 9 parts, and humic acid is 1 part, and chitosan is 5 ~ 10 parts, calper calcium peroxide-corruption
Growing sour nanocomposite partial size is 100 ~ 200nm.
It is further improved：The calper calcium peroxide, humic acid, chitosan weight be 5 ~ 7 ~:1:8~10.
It is further improved：The calper calcium peroxide is 1.5 ~ 3.5g, and humic acid is 0.3 ~ 0.5g, and chitosan is 2.4 ~ 5.0g.
A kind of preparation method of calper calcium peroxide capsule of nano soil-repairing agent, including the first step：First according to right
It is required that proportion described in 1, uses chemical coprecipitation to prepare partial size nano combined for calper calcium peroxide-humic acid of 100 ~ 200nm
Material then configures chitosan solution, and 2.4 ~ 5.0g chitosan is taken to be dissolved in 40 ~ 60mL acetum；
Second step：Calper calcium peroxide-humic acid nanocomposite that 1.8 ~ 4.0g is prepared is weighed, 10 ~ 20mL glacial acetic acid is dissolved in
It is configured to mixed solution, this mixed solution is extracted with needle tubing, is slowly dropped into the chitosan solution prepared.
In the first step, first by 1.5 ~ 4.5 gCaCl2Being dissolved in 30 ~ 60 mL volume ratios is 1 ~ 3:1 distilled water and
Then 30% H is added dropwise in ammonium hydroxide in the mixed solvent2O210 ~ 20 mL, and continue 40 ~ 60min of stirring, NaOH solution is then added dropwise
PH to 10 ~ 12 is adjusted, later 0.3 ~ 0.5g of fast drop humic acid solution, and mixed solution is placed in and is persistently stirred under room temperature
20 ~ 40min is mixed, finally loading centrifuge tube, which is put into a centrifuge, washs 2 ~ 4 times to neutrality with a large amount of deionized waters, is finally putting into dry
It is dry in dry case, it pulverizes, is sieved, is put into spare in bag.
In second step, during chitosan solution is added dropwise, continue to stir and be slowly added dropwise NaOH solution maintenance pH=10, shape
At chitosan material stop 20 in mother liquor ~ for 24 hours, the centrifuge tube that is placed on put into a centrifuge and washed with a large amount of deionized waters
2 ~ 4 times to neutral, finally by composite micro-capsule dry 20 in freeze drier ~ for 24 hours, pulverize, be sieved to get product.
A kind of application of calper calcium peroxide capsule of nano soil-repairing agent, it is characterised in that：The polycyclic virtue in degradation soil
The application of hydrocarbon, trichloro ethylene and petroleum hydrocarbon.
Advantages of the present invention：Preparation method in the present invention to the degradation property of renovation agent, is inhaled on the prior art
Attached performance and dispersion performance advanced optimize, can a step fabricated in situ based on calper calcium peroxide-humic acid nanocomposite
Microcapsules renovation agent, cyst material used are environmental-friendly natural organic matter chitosan.Present invention process is simple, operation letter
Just, reaction is mild, low energy consumption, and no bazardous waste generates.
Specific embodiment
The invention will be described in further detail combined with specific embodiments below.
The preparation of 1 calper calcium peroxide of embodiment-humic acid nanocomposite
By 3.0gCaCl2Being dissolved in 50 mL volume ratios is 1：Then 2 distilled water and ammonium hydroxide in the mixed solvent is added dropwise 30%
H2O215mL, and continue to stir 50min, NaOH solution is then added dropwise and adjusts pH to 11, fast drop 0.4g humic acid is molten later
Liquid, and mixed solution is placed in and persistently stirs 30min under room temperature is finally packed into centrifuge tube and puts into a centrifuge with largely going
Ion water washing 3 times extremely neutral, is finally putting into drying in drying box, pulverizes, is sieved, is put into spare in bag.
The preparation of 2 calper calcium peroxides of embodiment-humic acid nanocomposite
By 4.0gCaCl2Being dissolved in 60 mL volume ratios is 1：Then 3 distilled water and ammonium hydroxide in the mixed solvent is added dropwise 30%
H2O220mL, and continue to stir 60min, NaOH solution is then added dropwise and adjusts pH to 11.5, later fast drop 0.5g humic acid
Solution, and mixed solution is placed in and persistently stirs 30min under room temperature, it is finally packed into centrifuge tube and puts into a centrifuge with a large amount of
Deionized water washs 3 times to neutrality, is finally putting into drying in drying box, pulverizes, is sieved, is put into spare in bag.
The preparation of 3 calper calcium peroxide capsule of nano of embodiment
First configure 2%（w/v）Chitosan solution, i.e., 2.1g chitosan is dissolved in the acetum of 50mL1%（By 36% acetic acid with
Water presses 1:35 mass ratio mixing）, 2h is stirred under mechanical agitation, then weighs calper calcium peroxide-corruption that 2.4g is prepared
It grows sour nanocomposite and is dissolved in 10mL glacial acetic acid and be configured to mixed solution, extract this mixed solution with needle tubing, be slowly dropped into and match
Good chitosan solution, and continue to stir and be slowly added dropwise NaOH solution maintenance pH=10 during this period.The chitosan material of formation
Stopped in mother liquor for 24 hours, the centrifuge tube that is placed on put into a centrifuge and wash 3 times to neutral with a large amount of deionized waters, finally will
Composite micro-capsule is dry in freeze drier to pulverize for 24 hours, is sieved to get product.
The preparation of 4 calper calcium peroxide capsule of nano of embodiment
First configure 3%（w/v）Chitosan solution, i.e., 2.5g chitosan is dissolved in the acetum of 60mL1%（By 36% acetic acid with
Water presses 1:35 mass ratio mixing）, 2.5h is stirred under mechanical agitation, then weighs the calper calcium peroxide-that 3.6g is prepared
Humic acid nanocomposite is dissolved in 15mL glacial acetic acid and is configured to mixed solution, extracts this mixed solution with needle tubing, is slowly dropped into
The chitosan solution prepared, and continue to stir and be slowly added dropwise NaOH solution maintenance pH=10.5 during this period.The chitosan of formation
Material stops for 24 hours in mother liquor, the centrifuge tube that is placed on put into a centrifuge and wash 3 times to neutral, most with a large amount of deionized waters
It is afterwards that composite micro-capsule is dry in freeze drier to pulverize for 24 hours, it is sieved to get product.
Degradation property of the 5 calper calcium peroxide capsule of nano of embodiment to polycyclic aromatic hydrocarbon, trichloro ethylene and petroleum hydrocarbon
（1）It weighs the contaminated soil 10g that polycyclic aromatic hydrocarbon content is 50mg/kg to be put into 250mL conical flask, deionized water is added
Mud state soil mixed solution is made in 40mL, and liquid soil is made to consolidate mass ratio 4:1, calper calcium peroxide capsule of nano 0.4g is added,
It is stood after being sufficiently stirred for 24 hours, polycyclic aromatic hydrocarbon remaining in soil is extracted with ultrasonic method, it is tied using liquid chromatograph
Fruit carries out quantitative detecting analysis, and PAHs in soil removal rate reaches 80%；
（2）It weighs the contaminated soil 10g that trichloro ethylene content is 50mg/kg to be put into 250mL conical flask, deionized water is added
Mud state soil mixed solution is made in 40mL, and liquid soil is made to consolidate mass ratio 4:1, calper calcium peroxide capsule of nano 0.4g is added,
It is stood after being sufficiently stirred for 24 hours, trichloro ethylene remaining in soil is extracted with ultrasonic method, it is tied using liquid chromatograph
Fruit carries out quantitative detecting analysis, and trichloro ethylene removal rate reaches 90% in soil；
（3）It weighs the contaminated soil 10g that petroleum hydrocarbon content is 50mg/kg to be put into 250mL conical flask, deionized water 40mL is added
Mud state soil mixed solution is made, liquid soil is made to consolidate mass ratio 4:1, calper calcium peroxide capsule of nano 0.4g is added, sufficiently
It is stood after stirring for 24 hours, petroleum hydrocarbon remaining in soil is extracted with ultrasonic method, its result is carried out using liquid chromatograph
Quantitative detecting analysis, removal rate of petroleum hydrocarbons reaches 85% in soil.
Degradation property of the 6 calper calcium peroxide capsule of nano of embodiment to polycyclic aromatic hydrocarbon, trichloro ethylene and petroleum hydrocarbon
（1）It weighs the contaminated soil 10g that polycyclic aromatic hydrocarbon content is 50mg/kg to be put into 250mL conical flask, deionized water is added
Mud state soil mixed solution is made in 50mL, and liquid soil is made to consolidate mass ratio 5:1, calper calcium peroxide capsule of nano 0.5g is added,
It is stood after being sufficiently stirred for 24 hours, polycyclic aromatic hydrocarbon remaining in soil is extracted with ultrasonic method, it is tied using liquid chromatograph
Fruit carries out quantitative detecting analysis, and PAHs in soil removal rate reaches 85%；
（2）It weighs the contaminated soil 10g that trichloro ethylene content is 50mg/kg to be put into 250mL conical flask, deionized water is added
Mud state soil mixed solution is made in 50mL, and liquid soil is made to consolidate mass ratio 5:1, calper calcium peroxide capsule of nano 0.5g is added,
It is stood after being sufficiently stirred for 24 hours, trichloro ethylene remaining in soil is extracted with ultrasonic method, it is tied using liquid chromatograph
Fruit carries out quantitative detecting analysis, and trichloro ethylene removal rate reaches 94% in soil；
（3）It weighs the contaminated soil 10g that petroleum hydrocarbon content is 50mg/kg to be put into 250mL conical flask, deionized water 50mL is added
Mud state soil mixed solution is made, liquid soil is made to consolidate mass ratio 5:1, calper calcium peroxide capsule of nano 0.5g is added, sufficiently
It is stood after stirring for 24 hours, petroleum hydrocarbon remaining in soil is extracted with ultrasonic method, its result is carried out using liquid chromatograph
Quantitative detecting analysis, removal rate of petroleum hydrocarbons reaches 90% in soil.
Claims (7)
1. a kind of calper calcium peroxide capsule of nano soil-repairing agent, it is characterised in that：Including calper calcium peroxide, humic acid, chitosan,
The calper calcium peroxide is by CaCl2、H2O2, NaOH and ammonium hydroxide preparation gained, the calper calcium peroxide be 5 ~ 9 parts, humic acid be 1 part, shell
Glycan is 5 ~ 10 parts, and calper calcium peroxide-humic acid nanocomposite partial size is 100 ~ 200nm.
2. a kind of calper calcium peroxide capsule of nano soil-repairing agent according to claim 1, it is characterised in that：The peroxide
Change calcium, humic acid, chitosan weight be 5 ~ 7 ~:1:8~10.
3. a kind of calper calcium peroxide capsule of nano soil-repairing agent according to claim 1, it is characterised in that：The peroxide
Change calcium is 1.5 ~ 3.5g, and humic acid is 0.3 ~ 0.5g, and chitosan is 2.4 ~ 5.0g.
4. a kind of preparation method of calper calcium peroxide capsule of nano soil-repairing agent, it is characterised in that：Including,
The first step：First proportion described in accordance with the claim 1, the mistake for using chemical coprecipitation to prepare partial size as 100 ~ 200nm
Calcium oxide-humic acid nanocomposite, then configures chitosan solution, and 2.4 ~ 5.0g chitosan is taken to be dissolved in 40 ~ 60mL acetic acid
In solution；
Second step：Calper calcium peroxide-humic acid nanocomposite that 1.8 ~ 4.0g is prepared is weighed, 10 ~ 20mL glacial acetic acid is dissolved in
It is configured to mixed solution, this mixed solution is extracted with needle tubing, is slowly dropped into the chitosan solution prepared.
5. a kind of preparation method of calper calcium peroxide capsule of nano soil-repairing agent according to claim 4, feature exist
In：In the first step, first by 1.5 ~ 4.5 gCaCl2Being dissolved in 30 ~ 60 mL volume ratios is 1 ~ 3:1 distilled water and ammonium hydroxide is mixed
In bonding solvent, 30% H is then added dropwise2O210 ~ 20 mL, and continue 40 ~ 60min of stirring, NaOH solution is then added dropwise and adjusts pH
To 10 ~ 12,0.3 ~ 0.5g of fast drop humic acid solution later, and by mixed solution be placed under room temperature persistently stirring 20 ~
40min, finally loading centrifuge tube, which is put into a centrifuge, washs 2 ~ 4 times to neutrality with a large amount of deionized waters, is finally putting into drying box
Middle drying, pulverizes, and sieving is put into spare in bag.
6. a kind of preparation method of calper calcium peroxide capsule of nano soil-repairing agent according to claim 4, feature exist
In：In second step, during chitosan solution is added dropwise, continue to stir and be slowly added dropwise NaOH solution maintenance pH=10, the shell of formation
Chitosan material stops 20 in mother liquor ~ for 24 hours, the centrifuge tube that is placed on put into a centrifuge and washed 2 ~ 4 times with a large amount of deionized waters
To neutrality, finally by composite micro-capsule dry 20 in freeze drier ~ for 24 hours, pulverize, be sieved to get product.
7. a kind of application of calper calcium peroxide capsule of nano soil-repairing agent, it is characterised in that：Degradation PAHs in soil,
The application of trichloro ethylene and petroleum hydrocarbon.
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| CN201810353826.4A CN108865153B (en) | 2018-04-19 | 2018-04-19 | Calcium peroxide nano microcapsule soil remediation agent and preparation method and application thereof |
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| CN201810353826.4A CN108865153B (en) | 2018-04-19 | 2018-04-19 | Calcium peroxide nano microcapsule soil remediation agent and preparation method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527515A (en) * | 2019-08-20 | 2019-12-03 | 北京上水环境科技发展有限公司 | A kind of petroleum hydrocarbon contaminated soil renovation agent and its preparation and application method |
| CN110846046A (en) * | 2019-11-28 | 2020-02-28 | 浙江海洋大学 | Composite repairing agent for organic contaminated soil, preparation method and application thereof |
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