CN110075813A - A kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination and preparation method thereof - Google Patents
A kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination and preparation method thereof Download PDFInfo
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- CN110075813A CN110075813A CN201910447359.6A CN201910447359A CN110075813A CN 110075813 A CN110075813 A CN 110075813A CN 201910447359 A CN201910447359 A CN 201910447359A CN 110075813 A CN110075813 A CN 110075813A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/223—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
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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
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
Abstract
The present invention provides heavy metal-polluted soil adsorbent materials of a kind of resisting microbial contamination and preparation method thereof, the heavy metal-polluted soil adsorbent material includes spherical particle, the surface of the spherical particle is coated with nano-silica film layer, and the component of the spherical particle includes sodium carboxymethylcellulose, Sodium Polyacrylate, bentonite, chitosan, diatomite, corncob fine powder.The heavy metal-polluted soil adsorbent material of technical solution of the present invention, which adsorbs, to be stablized, and desorption efficiency is small, with better adsorption effect, microorganism adsorption can also be prevented parasitic, and used material is easily recycled and is regenerated, and it is more environmentally-friendly, it can be used for the Heavy Metal Pollution Control of water body and soil.
Description
Technical field
The invention belongs to environment protection treating technical field more particularly to a kind of heavy metal-polluted soil adsorption materials of resisting microbial contamination
Material and preparation method thereof.
Background technique
With the development of economy, a large amount of wastes that the mankind discharge into soil cause soil by serious pollution, special
It is not the content of beary metal raising in soil, the huge sum of money such as arsenic, mercury, lead, cadmium, chromium, copper, zinc, nickel, manganese, cobalt, selenium, vanadium, antimony, thallium, molybdenum
Belong to ion and deposit accumulation in the soil, serious destruction is caused to soil, serious threat is brought to ecological environment.Soil
In heavy metal pollution can enter in crops, reduce the quality of agricultural product, and finally flow into human body, it is strong to endanger body
Health.
Heavy metal by industrial pollution source emission, old and useless battery pollution and urbanization the problem of etc. approach enter water
Body environment causes the heavy metal concentration of aquatic ecosystem to have considerable degree of increase.China's heavy metal pollution of water body is asked
Topic is than more prominent.The main rivers such as the Changjiang river, the Zhujiang River, the pollution level of heavy metals exceeding standard section are super V class；Poyang Lake is rich
Pb is more than III class standard of surface water in the water of section；The content majority of Hg is apparently higher than suburb lake in Lake Water in Wuhan City
Water；Cu, Pb, Cd content are in slight pollution level in bottom mud in Taihu Lake；Dabaoshan Mine water body is by based on Cu, Zn, Cd, Pb
More metal combined contaminations, comprehensive pollution indexes be 2.23~18.11, over-standard phenomenon is more serious.The toxicity and biology of heavy metal
Cumulative bad, the pollution for causing it become a serious problem.All the time, to the feature of heavy metal pollution of water body, harm
Research with Treatment process is all popular project.
Heavy Metal Pollution Control technology has following several at present: precipitating and flocculation, electrochemical method, biological restoration, object
Physicochemical absorption method, magnetic absorption.Precipitating and flocculation process can consume a large amount of acid-base reagent, be primarily adapted for use in containing higher concentration
The processing of effluent containing heavy metal ions.Electrochemistry can recycle the heavy metal of higher degree from waste water, but this method is to a certain extent
By electrolyte consumption, current density is small, processing capacity is limited and energy consumption is high is limited, generally, for containing heavy metal and
The sewage of precious metal ion is electrochemically handled if water is little, is that comparison is effectively and economical.It is biological prosthetic
Method long processing period, costly, aquatic organism is mainly used as the instruction biology of Heavy-Metal-Contaminated Environments at present, for pollution control
Seldom.The advantages of magnetic absorption is a kind of novel adsorption method in research, has both separation and recycling, but cost of manufacture
Height fails have use value.Absorption method operates more simple, low energy consumption and concentration for the treatment of range is wide.To original waste water, first use
Absorption method reparation and recycling heavy metal, handle to reach emission request in conjunction with other methods, are relatively good selections.
Material currently used for heavy metal adsorption have sodium alginate, gelatin, bentonite, chitosan, cation exchange resin,
The substances such as carboxymethyl cellulose, starch, polyvinyl alcohol, diatomite, bacteria residue, stalk, heavy metal absorbent made of these materials
It will appear when using in the soil by the phenomenon of the microorganism adsorptions parasitisms such as bacterium algae in soil, to block heavy metal ion
Into the channel of adsorbent, adsorption efficiency is reduced.
Summary of the invention
Against the above technical problems, the invention discloses a kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination and its
Preparation method, the adsorbent material is efficient, stablizes, and easily recycling and regeneration, can be used for the Heavy Metal Pollution Control of water body and soil.
In this regard, the technical solution adopted by the present invention are as follows:
A kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination comprising spherical particle, the table of the spherical particle
Bread is covered with nano-silica film layer, and the component of the spherical particle includes sodium carboxymethylcellulose, Sodium Polyacrylate, swelling
Soil, chitosan, diatomite, corncob fine powder.
It adopts this technical solution, physical characteristic and silica itself of the nano-silica film layer because of nano particle
Hydrophily, bear it is electrical, it is therefore prevented that on the adsorbent material, while the hydrophily of silica can guarantee water to microorganism parasitism
In metal ion be adsorbed to material internal.The mode of this soil heavy-metal adsorption material absorption heavy metal ion is handed over ion
It is changed to master, organizes separately point and to be adsorbed containing a small amount of hydroxyl and amino, material stablizes the absorption of heavy metal ion, and desorption efficiency is small.
Further, the nano-silica film layer with a thickness of 20-50nm, the partial size of nano-silica film layer is
15-25nm。
As a further improvement of the present invention, the component and its mass percent of the spherical particle are as follows: carboxymethyl cellulose
Plain sodium 10-20%, Sodium Polyacrylate 10-20%, bentonite 20-60%, chitosan 0.2-1%, diatomite 10-30%, corn
Core fine powder 7-19%.
As a further improvement of the present invention, the partial size of the spherical particle is 1-5cm.
As a further improvement of the present invention, the spherical particle uses the material of each component is mixed after be granulated and obtain.
The invention also discloses a kind of heavy metal-polluted soil adsorbent materials of resisting microbial contamination described in any one as above
Preparation method comprising following steps:
Step S1 mixes sodium carboxymethylcellulose, Sodium Polyacrylate, bentonite, chitosan, diatomite, corncob fine powder
It closes uniform；
Uniformly mixed powder is granulated, obtains spherical particle by step S2；
Step S3 prepares silicon dioxide gel, spherical particle is put into silicon dioxide gel and is impregnated, progress is then taken out
Heating reaction, obtains the spherical particle of one layer of nano-silica film layer of cladding.
As a further improvement of the present invention, in step S2, granulation process includes: that uniformly mixed powder is put into ceramics
In pelletizer, water is added in spraying form then, is granulated, is dried to obtain spherical particle semi-finished product.
As a further improvement of the present invention, the dosage of water is the 15-25% of powder gross mass, and drying temperature is 75~85
℃。
As a further improvement of the present invention, in step S3, the configuration method of silicon dioxide gel are as follows: by 90~96 parts
Water, 4~10 parts of ethyl alcohol, 0.6-0.8 parts of nitric acid, 2-5 parts of ethyl orthosilicate mixing, then stir 0.5~2h, place 1~3h, drop
Enter 0.5-1 parts of ammonium hydroxide, obtains silicon dioxide gel after placement.
As a further improvement of the present invention, in step S3, the temperature of the heating reaction is 120-150 DEG C, when reaction
Between 0.5~2h.
Compared with prior art, the invention has the benefit that
It is such largely using organic substances such as polyvinyl alcohol, chitosan, starch in the adsorbent material that the prior art uses
Substance easily attracts microorganism to grow on it, and adsorption effect is caused to weaken.
Using technical solution of the present invention, the nano-silica film layer on spherical particle surface can prevent bacterium, algae
The adherency of equal microorganisms or organic matter is parasitic, guarantees that the heavy metal ion in water can smoothly enter absorbent interior；Simultaneously
The hydrophily of silica can guarantee that the metal ion in water is adsorbed to material internal, and adsorbent material internal composition is containing a small amount of
Hydroxyl and amino absorption, ensure that absorption is stablized, desorption efficiency is small.
Heavy metal-polluted soil adsorbent material of the invention, which adsorbs, to be stablized, and desorption efficiency is small, in the feelings with better adsorption effect
Under condition, moreover it is possible to it is parasitic to prevent microorganism adsorption, and used material is easily recycled and regenerated, it is more environmentally-friendly, it can be used for water body
With the Heavy Metal Pollution Control of soil.
Specific embodiment
Preferably embodiment of the invention is described in further detail below.
Embodiment 1
A kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination comprising spherical particle, the table of the spherical particle
Bread is covered with the nano-silica film layer of one layer of 20nm thickness, partial size 15nm or so, and the component of the spherical particle is by following original
Material composition: sodium carboxymethylcellulose 20%, Sodium Polyacrylate 15%, bentonite 44.8%, chitosan 0.2%, diatomite 10%,
Corncob fine powder 10%.
The preparation of the heavy metal-polluted soil adsorbent material of above-mentioned resisting microbial contamination, comprising the following steps:
(1) sodium carboxymethylcellulose, Sodium Polyacrylate, bentonite, chitosan, diatomite mix 8h in batch mixer；
(2) uniformly mixed powder is taken out, is put into ceramic prilling machine, water is added in spraying form, the dosage of water
It is the 15% of powder gross mass, produces the spherical particle of 1-2cm, carries out 80 DEG C and be dried to obtain semi-finished product.
(3) silicon dioxide gel, the configuration method of silicon dioxide gel are as follows: by 93.4 parts of water, 4 parts of ethyl alcohol, 0.6 part are prepared
Nitric acid, 2 parts of ethyl orthosilicate mixing, then stir 0.5~2h, place 1~3h, instill 0.5 part of ammonium hydroxide, obtain dioxy after placement
SiClx colloidal sol.Semi-finished product are impregnated into 1h in colloidal sol, 150 DEG C of reaction 1h are heated to after taking-up, form one layer of nanometer two on surface
Membranous layer of silicon oxide.
Embodiment 2
A kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination comprising spherical particle, the table of the spherical particle
Bread is covered with the nano-silica film layer of 35nm thickness, partial size 25nm or so, and the component of the spherical particle is by following raw material group
At: sodium carboxymethylcellulose 10%, Sodium Polyacrylate 20%, bentonite 20%, chitosan 1%, diatomite 30%, corncob are thin
Powder 19%.
The preparation of the heavy metal-polluted soil adsorbent material of above-mentioned resisting microbial contamination, comprising the following steps:
(1) sodium carboxymethylcellulose, Sodium Polyacrylate, bentonite, chitosan, diatomite mix 8h in batch mixer；
(2) uniformly mixed powder is taken out, is put into ceramic prilling machine, water is added in spraying form, the dosage of water
It is the 13% of powder gross mass, produces the spherical particle of 3-5cm, carries out 80 DEG C and be dried to obtain semi-finished product.
(3) silicon dioxide gel, the configuration method of silicon dioxide gel are as follows: by 90 parts of water, 4.4 parts of ethyl alcohol, 0.6 part are prepared
Nitric acid, 5 parts of ethyl orthosilicate mixing, then stir 0.5~2h, place 1~3h, instill 1 part of ammonium hydroxide, obtain titanium dioxide after placement
Silica solution.Semi-finished product are impregnated into 1h in colloidal sol, 150 DEG C of reaction 1h are heated to after taking-up, form one layer of nano-silica on surface
SiClx film layer.
Embodiment 3
A kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination comprising spherical particle, the table of the spherical particle
Bread is covered with the nano-silica film layer of 50nm thickness, partial size 20nm or so, and the component of the spherical particle is by following raw material group
At: sodium carboxymethylcellulose 10%, Sodium Polyacrylate 10%, bentonite 60%, chitosan 0.2%, diatomite 10%, corncob
Fine powder 9.8%.
The preparation of the heavy metal-polluted soil adsorbent material of above-mentioned resisting microbial contamination, comprising the following steps:
(1) sodium carboxymethylcellulose, Sodium Polyacrylate, bentonite, chitosan, diatomite mix 8h in batch mixer；
(2) uniformly mixed powder is taken out, is put into ceramic prilling machine, water is added in spraying form, the dosage of water
It is the 13% of powder gross mass, produces the spherical particle of 3-5cm, carries out 80 DEG C and be dried to obtain semi-finished product.
(3) silicon dioxide gel, the configuration method of silicon dioxide gel are as follows: by 92 parts of water, 4.2 parts of ethyl alcohol, 0.8 part are prepared
Nitric acid, 3 parts of ethyl orthosilicate mixing, then stir 0.5~2h, place 1~3h, instill 0.7 part of ammonium hydroxide, obtain dioxy after placement
SiClx colloidal sol.Semi-finished product are impregnated into 1h in colloidal sol, 150 DEG C of reaction 1h are heated to after taking-up, form one layer of nanometer two on surface
Membranous layer of silicon oxide.
Comparative example 1
The spherical particle of Example 1,2,3, surface do not coat nano-silica film layer and adsorb as heavy metal-polluted soil
Material comparative example.
The heavy metal-polluted soil adsorbent material of above-described embodiment 1~3 and comparative example 1 are subjected to adsorbance examination in accordance with the following methods
It tests
Adsorbance test: 100g Cu is prepared2+Concentration is the copper nitrate solution of 200mg/kg, and pH is adjusted to 4, is put into 1g material,
4h is impregnated, the solution concentration after test absorption, the results are shown in Table 1:
1 Examples 1 to 3 of table, the adsorbance test result of comparative example 1
| The Cu of material2+Adsorbance | Ion exchange capacity | |
| Embodiment 1 | 50mg/g | 1.6mmol/g |
| Embodiment 2 | 51.2mg/g | 1.63mmol/g |
| Embodiment 3 | 50.8mg/g | 1.62mmol/g |
| Comparative example 1 | 48mg/g | 1.53mmol/g |
Comparative example 2
Each 1kg of aqueous soil in farmland is taken, Cu is configured to2+Concentration is the contaminated soil of 200mg/kg, is respectively put into 5 grams
The finished product of the material of uncoated silica coating comparative example 2, Examples 1 to 3 with silica coating, stirs evenly, puts
Remaining Cu in soil is measured after setting 7 days2+Concentration.
2 Examples 1 to 3 of table, the adsorption by soil amount test result of comparative example 1
| Residue Cu in soil2+Concentration | |
| Embodiment 1 | 37mg/g |
| Embodiment 2 | 39.6mg/g |
| Embodiment 3 | 38.5mg/g |
| Comparative example 2 | 113mg/g |
Place the remaining Cu of soil of 2 material of comparative example2+Concentration is 113mg/kg, and mould is covered on material；It places real
Apply the remaining Cu of soil of 1,2,3 finished product of example2+Concentration is 37mg/kg or so, without algae bacterial growth on material.
By the comparison of embodiment and comparative example 2 as it can be seen that using the present embodiment heavy metal-polluted soil adsorbent material, have
Better adsorption effect, and microorganism adsorption can also be prevented parasitic.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of heavy metal-polluted soil adsorbent material of resisting microbial contamination, it is characterised in that: it includes spherical particle, described spherical
The surface of particle is coated with nano-silica film layer, and the component of the spherical particle includes sodium carboxymethylcellulose, polypropylene
Sour sodium, bentonite, chitosan, diatomite, corncob fine powder.
2. the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 1, it is characterised in that: the nanometer
Silica coating with a thickness of 20-50 nm, the partial size of nano-silica film layer is 15-25 nm.
3. the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 1, it is characterised in that: described spherical
The component and its mass percent of particle are as follows: sodium carboxymethylcellulose 1020%, Sodium Polyacrylate 1020%, bentonite 2060%, shell
Glycan 0.21%, diatomite 1030%, corncob fine powder 7-19%.
4. the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 3, it is characterised in that: described spherical
The partial size of particle is 1-5cm.
5. the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 3, it is characterised in that: described spherical
Particle uses the material of each component is mixed after be granulated and obtain.
6. a kind of preparation side of the heavy metal-polluted soil adsorbent material of the resisting microbial contamination as described in claim 1 ~ 5 any one
Method, which is characterized in that itself the following steps are included:
Step S1 mixes sodium carboxymethylcellulose, Sodium Polyacrylate, bentonite, chitosan, diatomite, corncob fine powder equal
It is even；
Uniformly mixed powder is granulated, obtains spherical particle by step S2；
Step S3 prepares silicon dioxide gel, spherical particle is put into silicon dioxide gel and is impregnated, then takes out and is heated
Reaction obtains the spherical particle of one layer of nano-silica film layer of cladding.
7. the preparation method of the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 6, feature exist
In: in step S2, granulation process includes: that uniformly mixed powder is put into ceramic prilling machine, then by water with spraying shape
Formula is added, and is granulated, is dried to obtain spherical particle semi-finished product.
8. the preparation method of the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 7, feature exist
In: the dosage of water is the 15-25% of powder gross mass, and drying temperature is 75 ~ 85 DEG C.
9. the preparation method of the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 6, feature exist
In: in step S3, the configuration method of silicon dioxide gel are as follows: by 90 ~ 96 parts of water, 4 ~ 10 parts of ethyl alcohol, 0.6-0.8 parts of nitric acid, 2-5
Part ethyl orthosilicate mixing, then stirs 0.5 ~ 2h, places 1 ~ 3h, instill 0.5-1 parts of ammonium hydroxide, it is molten to obtain silica after placement
Glue.
10. the preparation method of the heavy metal-polluted soil adsorbent material of resisting microbial contamination according to claim 6, feature exist
In: in step S3, the temperature of the heating reaction is 120-150 DEG C, 0.5 ~ 2h of reaction time.
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| CN113399446A (en) * | 2021-06-22 | 2021-09-17 | 岩土科技股份有限公司 | Brick kiln co-processing method for heavy metal contaminated soil |
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| CN113399446A (en) * | 2021-06-22 | 2021-09-17 | 岩土科技股份有限公司 | Brick kiln co-processing method for heavy metal contaminated soil |
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Application publication date: 20190802 |