CN106862260A - A kind of biochemical process for administering Cadmium Pollution in Soils - Google Patents
A kind of biochemical process for administering Cadmium Pollution in Soils Download PDFInfo
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- CN106862260A CN106862260A CN201710141669.6A CN201710141669A CN106862260A CN 106862260 A CN106862260 A CN 106862260A CN 201710141669 A CN201710141669 A CN 201710141669A CN 106862260 A CN106862260 A CN 106862260A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention belongs to biological technical field, a kind of biochemical process for administering Cadmium Pollution in Soils is disclosed, it comprises the following steps：Step 1）Prepare microorganism formulation, step 2）Prepare nanometer iron preparation, step 3）Soil pretreatment, step 4）Chemistry is fixed to be repaired, step 5）It is biological prosthetic.Operation is simple for biochemical process of the invention, and rehabilitation cost is low, can be applied in large-scale cadmium pollution soil, has a extensive future.
Description
Technical field
The invention belongs to biological technical field, and in particular to a kind of biochemical process of improvement Cadmium Pollution in Soils.
Background technology
Cadmium is human body non-essential element, is often existed with compound state in nature, and general content is very low, home
Under state, health is not interfered with.Cadmium and zinc are congeners, in nature cadmium often with zinc, lead symbiosis.Work as soil environment
After cadmium pollution, cadmium can be enriched with vivo, and slow poisoning is caused into human body by food chain.Cadmium is absorbed by the body
Afterwards, cadmium sulfoprotein is formed in vivo, optionally in accumulation liver, kidney.Wherein, kidney can absorb the cadmium into vivo nearly 1/3, is
" target organ " of cadmium poisoning.Other internal organs such as spleen, pancreas, thyroid gland and hair etc. also have a certain amount of accumulation.Because cadmium damages kidney
There is glycosuria, albuminuria and acidaminuria in tubule, patient.Especially tool the metabolism of bone is obstructed, cause osteoporosis, atrophy,
The a series of symptoms such as deformation.Cadmium pollution soil, can cause nuisance disease itai-itai.Pollution of the cadmium to soil, mainly passes through two kinds of shapes
Formula, one is the cadmium box haul surrounding diffusion in industrial waste gas, through natural subsidence, is accumulated in factory's surrounding soil, another kind side
Formula is that industrial waste water containing Cd irrigation Nong Tian ﹐ make soil be polluted by cadmium.Therefore in order to prevent pollution of the cadmium to environment, it is necessary to do
The environmental health standards of good environmental protection Gong Zuo ﹐ strict implement cadmiums.
At present, administering cadmium pollution has various methods, and wherein microbial technique method develops rapidly in recent years, achieves preferably
Effect, microbial technique method will not be polluted to environment, but existence and stability is poor, it is impossible to effectively cadmium metal is carried out
Fixed, cadmium metal is easily lost in moisture etc., causes environmental pollution.
The content of the invention
In order to overcome the defect of prior art, the invention provides a kind of biochemical process for administering Cadmium Pollution in Soils；The work
Skill is fixed and repaired to Cadmium in Soil using microorganism formulation and chemicals synergy treatment soil, it is to avoid with
Current lose the pollution for causing, while carrying out, except cadmium, effectively having repaired soil environment using high-efficiency microorganism preparation.
The present invention is achieved by the following technical solution：
A kind of biochemical process for administering Cadmium Pollution in Soils, it comprises the following steps：Step 1）Prepare microorganism formulation, step 2）System
Standby nanometer iron preparation, step 3）Soil pretreatment, step 4）Chemistry is fixed to be repaired, step 5）It is biological prosthetic.
Specifically, the biochemical process comprises the following steps：
Step 1）Prepare microorganism formulation：It is 1 × 10 that Phanerochaete chrysosporium and pseudomonad are trained into concentration respectively8Individual/
The bacterium solution of ml, according to 2-3:The volume ratio of 1-2 is mixed to get mixed bacteria liquid, then with diatomite according to 1:2 mass ratio mixing is stirred
Mix uniform, finally carry out low temperature drying, drying temperature is 15 DEG C, and water content is 8wt% after drying, and is obtained final product；
Step 2）Prepare nanometer iron preparation：Under nitrogen protection, it is the FeSO of 0.02M toward concentration4Polyethylene pyrrole is added in solution
Pyrrolidone, stirs and evenly mixs, and incorporation time is 15min, and the concentration for being subsequently adding equal volume is the NaBH of 0.02M4The aqueous solution,
Under nitrogen protective condition, 500rpm stirring mixing 15min；Vacuum filtration after 10min is stood, then is placed in 60 DEG C and dry 1h, obtained final product；
Step 3）Soil pretreatment：The soil of cadmium pollution is turned over, is dried, crushed, control soil particle diameter is less than 2mm；
Step 4）Chemistry is fixed to be repaired：Toward step 2）In obtain adding 10 times of water of weight in nanometer iron preparation, stir, make
Into nanometer ferrous solution, nanometer ferrous solution is uniformly then sprayed onto step 3）In the soil of pretreatment, and make soil moisture with water
Content is 30-50wt%, is mixed, and stands 10 hours；
Step 5）It is biological prosthetic：Toward step 4）Soil in add microorganism formulation, addition is the one thousandth of soil quality,
Stir, 28-35 DEG C of standing 48-72h.
Preferably, the Phanerochaete chrysosporium is ATCC 24725.
Preferably, the pseudomonad is CCTCC NO: 2011184.
Preferably, the step 2）In, the addition of polyvinylpyrrolidone is FeSO4The 1% of solution quality.
Preferably, it is characterised in that the step 4）In, the nanometer ferrous solution accounts for step 3）The soil matter of middle pretreatment
The 0.1-1% of amount.
The training method of bacterial strain of the invention is not unique fixed, and it can obtain bacterium using conventional training method
Liquid, bacterial strain can be obtained from the purchase of the commercial sources such as ATCC, CCTCC.
Compared with prior art, advantages of the present invention mainly includes but is not limited to the following aspects：
The present invention is fixed and repaiied to Cadmium in Soil using microorganism formulation and chemicals synergy treatment soil
It is multiple, it is to avoid loss is polluted, while carrying out, except cadmium, effectively having repaired soil environment using high-efficiency microorganism preparation；The present invention
Reasonable compatibility between each strain of microorganism formulation, symbiosis is coordinated, mutually not antagonism, can effectively eliminate cadmium pollution；The present invention with
Polyvinylpyrrolidone is modified as stabilizer to Nanoscale Iron, and the modified Nano iron for obtaining has dispersive property good, in soil
Stability and animal migration are good in earth, the advantages of remediation efficiency is high；Operation is simple for biochemical process of the invention, rehabilitation cost
It is low, can be applied in large-scale cadmium pollution soil, have a extensive future.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, below in conjunction with the application tool
Body embodiment, is more clearly and completely described to the present invention, it is clear that described embodiment is only the application one
Divide embodiment, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, should all belong to the scope of protection of the invention.
Embodiment 1
A kind of biochemical process for administering Cadmium Pollution in Soils, it comprises the following steps：
1）Prepare microorganism formulation：By Phanerochaete chrysosporium ATCC 24725 and pseudomonad CCTCC NO: 2011184（Ginseng
See CN2011102153648）It is 1 × 10 to be trained concentration respectively8The bacterium solution of individual/ml, according to 2:1 volume ratio is mixed to get mixed
Bacterium solution is closed, then by mixed bacteria liquid and diatomite according to 1:2 quality finally carries out low temperature drying than mixing and stirring, dries
Temperature is 15 DEG C, and water content is 8wt% after drying, and is obtained final product；
2）Prepare nanometer iron preparation：Under nitrogen protection, it is the FeSO of 0.02M toward concentration4Polyvinyl pyrrole is added in the aqueous solution
Alkanone, the addition of polyvinylpyrrolidone is FeSO4The 1% of solution quality；Mechanical agitation is allowed to be sufficiently mixed, incorporation time
For 15min obtains mixed solution, it is the NaBH of 0.02M to be subsequently adding with the concentration of mixed solution equal volume4The aqueous solution, in nitrogen
Under the conditions of gas shielded, 500rpm stirring mixing 15min are obtained modified Nano iron particle；Vacuum filtration after 10min is stood, then is put
1h is dried in 60 DEG C, a nanometer iron preparation is obtained final product；
3）Soil pretreatment：The soil of cadmium pollution is turned over, is dried, crushed, control particle diameter is less than 2mm；
4）Chemistry is fixed to be repaired：By step 2）In obtain a nanometer iron preparation, add 10 times of water of weight, stir, be made and receive
Rice ferrous solution, is then uniformly sprayed onto step 3 by nanometer ferrous solution）In the soil of middle pretreatment, and the soil moisture is set to be with water
50wt%, mixes, and stands 10 hours；The nanometer ferrous solution accounts for step 3）The 0.1% of the soil quality of middle pretreatment；
5）It is biological prosthetic：Toward step 4）Soil in add microorganism formulation, addition is the one thousandth of soil quality, stirring
Uniformly, 35 DEG C of standing 48h.
Embodiment 2
A kind of biochemical process for administering Cadmium Pollution in Soils, it comprises the following steps：
1）Prepare microorganism formulation：By Phanerochaete chrysosporium ATCC 24725 and pseudomonad CCTCC NO:2011184 points
It is 1 × 10 not to be trained concentration8The bacterium solution of individual/ml, according to 3:2 volume ratio is mixed to get mixed bacteria liquid, then is pressed with diatomite
According to 1:2 quality finally carries out low temperature drying than mixing and stirring, and drying temperature is 15 DEG C, and water content is after drying
8wt%, obtains final product；
2）Prepare nanometer iron preparation：Under nitrogen protection, it is the FeSO of 0.02M toward concentration4The polyvinyl pyrrole added in solution
Alkanone, the addition of polyvinylpyrrolidone is FeSO4The 1% of solution quality；Mechanical agitation is allowed to be sufficiently mixed, incorporation time
It is 15min, the concentration for being subsequently adding equal volume is the NaBH of 0.02M4The aqueous solution, under nitrogen protective condition, 500rpm is stirred
Mix mixing 15min；Vacuum filtration after 10min is stood, then is placed in 60 DEG C and dry 1h, obtained final product；
3）Soil pretreatment：The soil of cadmium pollution is turned over, is dried, crushed, control particle diameter is less than 2mm；
4）Chemistry is fixed to be repaired：By step 2）In obtain a nanometer iron preparation, add 10 times of water of weight, stir, be made and receive
Rice ferrous solution, is then uniformly sprayed onto step 3 by nanometer ferrous solution）In the soil of middle pretreatment, and the soil moisture is set to be with water
40wt%, mixes, and stands 10 hours；The nanometer ferrous solution accounts for step 3）The 0.2% of the soil quality of middle pretreatment；
5）It is biological prosthetic：Toward step 4）Soil in add microorganism formulation, addition is the one thousandth of soil quality, stirring
Uniformly, 32 DEG C of standing 48h.
Embodiment 3
Animal migration and stability test：Nanometer iron preparation with the preparation of embodiment 1 is selected without polyvinyl pyrrole as experimental group
The modified preparation of alkanone is as a control group（Preparation method with embodiment 1, without polyvinylpyrrolidone）.
Step is as follows：
（1）Fe in experimental group and control group0Concentration is 1.0g/L.
（2）Cadmium pollution acid soil is taken into 10g to be filled in respectively in the plexiglas post of diameter 1.0cm, 10cm long.
（3）By the Fe of same volume0Solution and purified water are noted with the speed of 0.2 mL/min from earth pillar top respectively
Enter, collection penetrates liquid.
（4）Liquid is penetrated through 0.22 μm of membrane filtration, 0.1 M HCl is added, with gas ions-mass spectrograph（ICP-MS）Carry out
The measure of Fe contents；Fe contents（mg·L-1）Specifically it is shown in Table 1：
Table 1
| Group | Purified water | Control group | Experimental group |
| Fe contents | 41.8 | 72.6 | 136.9 |
Have detected stability simultaneously：PH is 5.3, during cadmium content is for the soil of 236mg/kg, adds Fe0Concentration is respectively 0.5mg/
Under conditions of kg, 1.0mg/kg, 48h is processed, the Leaching of control group and experimental group is respectively 37.1% and 9.6%（Fe0Concentration
It is 0.5mg/kg）, 45.9% and 12.6%（Fe0Concentration is 1.0mg/kg）.
Above-mentioned experimental data show the nano iron particles without polyvinyl pyrrolidone modified with the injection of liquid quilt
Heavy-metal composite pollution acid soil is adsorbed, and animal migration is poor；The aobvious acidity of the pH of soil, and polyvinylpyrrolidone is a kind of non-
Ionic macromolecular compound, with very strong hydrophily, the positive and negative charge of institute's band in nanometer iron preparation of the invention and soil
There is no electrostatic interaction, therefore it has preferably transfer ability in soil.And through the nanometer of polyvinyl pyrrolidone modified
After iron preparation is stabilized, the stabilization effect of the cadmium metal in cadmium pollution acid soil is far better than unused polyvinylpyrrolidone
Modified nanometer iron preparation.
Embodiment 4
Removal of the present invention process to Cadmium in Soil metal is tested：
Soil sample is 30kg, and cadmium content is 179mg/kg, and sample is divided into three parts, respectively 1 group of embodiment, 1 group of control（Only
Addition ATCC 24725, other are with embodiment 1）, compare 2 groups（Only add CCTCC NO:2011184, other are with embodiment 1）.
Specifically it is shown in Table 2：
Table 2
| Group | 1 group of embodiment | Compare 1 group | Compare 2 groups |
| Cadmium concentration（mg/kg） | 12.56 | 29.18 | 35.93 |
Conclusion：Complex microorganism preparations of the present invention are much better than single bacterial strain except cadmium ability, illustrate two kinds of bacterial strain compatibilities rationally, tool
Standby preferably synergy.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specific example " or
The description of " some examples " etc. means that combining the embodiment or specific features, structure, material or the feature of example description includes
In at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term necessarily pin
To be identical embodiment or example.Although embodiments of the invention have been shown and described above, it is to be understood that
Above-described embodiment is exemplary, it is impossible to be interpreted as limitation of the present invention, one of ordinary skill in the art is of the invention
In the range of above-described embodiment can be changed, change, replace and modification.
Claims (6)
1. it is a kind of administer Cadmium Pollution in Soils biochemical process, it comprises the following steps：Step 1）Prepare microorganism formulation, step 2）
Prepare nanometer iron preparation, step 3）Soil pretreatment, step 4）Chemistry is fixed to be repaired, step 5）It is biological prosthetic.
2. biochemical process according to claim 1, it is characterised in that the biochemical process comprises the following steps：
Step 1）Prepare microorganism formulation：It is 1 × 10 that Phanerochaete chrysosporium and pseudomonad are trained into concentration respectively8Individual/ml
Bacterium solution, according to 2-3:The volume ratio of 1-2 is mixed to get mixed bacteria liquid, then with diatomite according to 1:2 mass ratio is mixed
Uniformly, low temperature drying is finally carried out, drying temperature is 15 DEG C, and water content is 8wt% after drying, and is obtained final product；
Step 2）Prepare nanometer iron preparation：Under nitrogen protection, it is the FeSO of 0.02M toward concentration4Polyvinyl pyrrole is added in solution
Alkanone, stirs and evenly mixs, and incorporation time is 15min, and the concentration for being subsequently adding equal volume is the NaBH of 0.02M4The aqueous solution, in nitrogen
Under the conditions of gas shielded, 500rpm stirring mixing 15min；Vacuum filtration after 10min is stood, then is placed in 60 DEG C and dry 1h, obtained final product；
Step 3）Soil pretreatment：The soil of cadmium pollution is turned over, is dried, crushed, control soil particle diameter is less than 2mm；
Step 4）Chemistry is fixed to be repaired：Toward step 2）In obtain adding 10 times of water of weight in nanometer iron preparation, stir, make
Into nanometer ferrous solution, nanometer ferrous solution is uniformly then sprayed onto step 3）In the soil of pretreatment, and add during water makes soil
Moisture is 30-50wt%, stands 10 hours；
Step 5）It is biological prosthetic：Toward step 4）Soil in add microorganism formulation, addition is the one thousandth of soil quality,
Stir, 28-35 DEG C of standing 48-72h.
3. biochemical process according to claim 2, it is characterised in that the Phanerochaete chrysosporium is ATCC 24725.
4. biochemical process according to claim 2, it is characterised in that the pseudomonad is CCTCC NO: 2011184.
5. biochemical process according to claim 2, it is characterised in that the step 2）In, polyvinylpyrrolidone adds
Dosage is FeSO4The 1% of solution quality.
6. biochemical process according to claim 2, it is characterised in that the step 4）In, the nanometer ferrous solution accounts for step
Rapid 3）The 0.1-1% of the soil quality of middle pretreatment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108865154A (en) * | 2018-06-11 | 2018-11-23 | 佛山皖阳生物科技有限公司 | A kind of cadmium soil remediation biological agent |
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