CN106398702B - A kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament and its renovation technique - Google Patents
A kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament and its renovation technique Download PDFInfo
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- CN106398702B CN106398702B CN201610395940.4A CN201610395940A CN106398702B CN 106398702 B CN106398702 B CN 106398702B CN 201610395940 A CN201610395940 A CN 201610395940A CN 106398702 B CN106398702 B CN 106398702B
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- soil
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
Abstract
It is efficiently restored the invention discloses a kind of heavy-metal contaminated soil and repairs medicament, including following composition by weight: 8-18 parts of nano zero valence iron, 5-26 parts of ferrous sulfate, 3-17 parts of calcium polysulfide, 2-9 parts of bloodstone, 5-19 parts of iron powder, 1-3 parts of vulcanized sodium, 3-11 parts of chitosan, 2-16 parts of iron chloride, 9-38 parts of microorganism group mixture, 50-180 parts of Solution agent.The invention also discloses a kind of heavy metal-polluted soil renovation techniques, comprising the following steps: S1: weigh proportion, S2: soil tentatively overturns, S2: soil tentatively overturns, S3: soil crushes, and S4: S5: stirring and dissolving agent sows lytic agent；The formula of the invention is reasonable, and technique is more scientific, can effectively reduce the valence heavy metal ions content in soil.
Description
Technical field
The present invention relates to heavy metal-polluted soils to repair field, and specially a kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament
And its renovation technique.
Background technique
Existing soil treatment medicine component is unreasonable, after existing medicament discharges a period of time, has been reduced
Heavy metal ion, and high price state can be oxidized to due to the oxidation of air, wherein biggish to soil harm is six
Valence chromium ion and pentavalent arsenic ion, the excessive concentration of both ions can seriously affect the health degree of soil, and existing
Heavy metal-polluted soil treatment process steps are cumbersome, and it is excessively high to implement cost, be not suitable for it is large-scale promote, influence heavy metal-polluted soil
The efficiency of processing.
Summary of the invention
It is efficiently restored the purpose of the present invention is to provide a kind of heavy-metal contaminated soil and repairs medicament and its renovation technique, with
Solve the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme: a kind of heavy-metal contaminated soil efficiently restores reparation
Medicament, including following composition by weight: 8-18 parts of nano zero valence iron, 5-26 parts of ferrous sulfate, 3-17 parts of calcium polysulfide, bloodstone 2-
9 parts, 5-19 parts of iron powder, 1-3 parts of vulcanized sodium, 3-11 parts of chitosan, 2-16 parts of iron chloride, microorganism group mixture 9-38
Part, 50-180 parts of Solution agent.
Preferably, the microorganism group mixture includes following composition by weight: 2-7 parts of bacillus, 3-10 parts of white-rot fungi,
Gordona amarae 4-11.
Preferably, the Solution agent includes following composition by weight: 32-112 parts of water, 11-30 parts of ammonium hydrogen carbonate, and phosphoric acid
6-20 parts of calcium, 1-18 parts of potassium sulfate.
A kind of heavy metal-polluted soil renovation technique, comprising the following steps:
S1: weighing proportion, and the raw material that heavy metal-polluted soil repairs medicament is weighed, and saves respectively spare；
S2: soil tentatively overturns, by the ferrous sulfate after proportion, calcium polysulfide, bloodstone, iron powder, vulcanized sodium, chlorination
Tie Tong crosses sowing apparatus and sows soil surface, then carries out preliminary scarifying processing to soil using arable land equipment, will sow
The medicament of soil surface is dissolved into soil；
S3: soil crushes, and the nano zero valence iron after proportion, chitosan, microorganism group mixture use are sowed
Equipment is applied to soil surface, and carries out rotary tillage process to soil using rotary tillage equipment, soil is crushed, and further make medicine
Agent is merged with soil；
S4: each component of the lytic agent of proportion is put into mixing plant and is stirred by stirring and dissolving agent, stirring
Environment temperature be 15-26 degrees Celsius, pressure be 88-112 kPas, until lytic agent be in suspended liquid status；
S5: sowing lytic agent, and the lytic agent suspension after stirring is sprayed onto soil to be processed using spray appliance
Surface, repair process are completed.
Nano zero valence iron in the present invention can effectively reduce the heavy metal ion content in soil, due to nano zero-valence
Iron particle partial size is smaller, and size is 1~100nm, and with the reduction of particle diameter, the ratio that surface atom number accounts for total atom number is anxious
Increase severely and add, the surface area of nanoparticle and surface can also increase rapidly, therefore adsorption capacity is extremely strong, and this nano zero valence iron
It is oxidizable, therefore the speed that valence heavy metal ions are oxidized in soil can be slowed down, to extend having for medicament of the invention
Imitate the time.
Microorganism group mixture bacillus has high adsorption efficiency to chromium, is 20mg/L in chromium initial mass concentration,
PH5.0, adsorption temp are 20 DEG C, adsorption time 20min, and adsorption rate is up to 82.9% at this time, and Gordona amarae has heavy metal
Have suction-operated, for the removal rate of arsenic up to 86% or so, white-rot fungi also has larger adsorption capacity to heavy metal, to Pb, Hg,
Cu, Ni adsorbance respectively reach 108,61,60,56mg/g.
Chitosan can be used as a kind of adsorbent, ligand or chelating agent for halogenated hydrocarbons such as haloforms in water
With the enrichment and separation of certain heavy metal ion, 90% can be reached to the adsorption rate of Cr in water body.
Since effect of the microorganism remediation technology to low concentration pollutant is preferable, but by highly concentrated nano Zero-valent Iron and micro- life
Nano zero valence iron shows a degree of toxic action to microorganism and inhibits the growth of microorganism when object mixes, and this
Contain chitosan in the reparation formula of invention, the surface of nano zero valence iron be coated on after this natural polymer mixing,
So that microorganism is not directly contacted with nano zero valence iron, reduce the toxic action to microorganism, promote microorganism breeding and
Growth, chitosan not only itself has very strong heavy metal adsorption, while can provide micro- life as organic matter
Object grows enough nutriments.
Due to introducing chitosan, so that three kinds of microorganisms reduce to the competing of carbon source in microorganism group mixture
It strives, fast breeder can be obtained, do not inhibited mutually, found by test of many times, mentioned microorganism itself is simultaneously using production
Good synergistic effect is given birth to.
Solution agent not only can form chelate with heavy metal, play the role of fixed heavy metal, moreover it is possible to provide micro-
Mineral element necessary to biological growth promotes the growth of microorganism.
Each component cooperation in the present invention, component proportion are also just to be determined by test of many times, are obtained very well
Heavy metal treatment effect.
Compared with prior art, the beneficial effects of the present invention are: the more scientific conjunction of soil remediation reagent combination of the invention
Reason, each component cooperation can effectively reduce the heavy metal ion content in soil by addition nano zero valence iron, by
Smaller in nano zero valence iron grain diameter, size is 1~100nm, and with the reduction of particle diameter, surface atom number accounts for total atom
Several ratios sharply increase, and the surface area of nanoparticle and surface can also increase rapidly, therefore adsorption capacity is extremely strong, and this
Nano zero valence iron is oxidizable, therefore can slow down the speed that valence heavy metal ions are oxidized in soil, to extend the present invention
Medicament effective time, chitosan reduces toxic action of the Nanoscale Iron to microorganism, so that microorganism group mixture
In three kinds of microorganisms reduce the competition to carbon source, fast breeder can be obtained, itself be also equipped with strong absorption heavy metal
Ability, Solution agent not only can form chelate with heavy metal, play the role of fixed heavy metal, moreover it is possible to provide microorganism
Mineral element necessary to growing, promotes the growth of microorganism.Soil soil property is improved simultaneously, is removing weight convenient for soil
While metallic pollution, restore the ability of long-term cropping.
Soil remediation processing step of the invention is simple, medicament can be made to be sufficiently mixed with soil, thus more comprehensive
By the heavy metal ion reparation in soil, the heavy metal ion long period in soil is enable to keep compared with low state, total comes
It says, the formula of the invention is reasonable, and technique is more scientific, can effectively reduce the valence heavy metal ions content in soil.
Detailed description of the invention
Fig. 1 is that invention experimental result compares table.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one
The present invention provides a kind of technical solution: a kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament, including following heavy
It measures component: 10 parts of nano zero valence iron, 6 parts of ferrous sulfate, 7 parts of calcium polysulfide, 3 parts of bloodstone, 5 parts of iron powder, 1 part of vulcanized sodium, taking off
4 parts of acetyl chitin, 6 parts of iron chloride, 12 parts of microorganism group mixture, 90 parts of Solution agent.
Wherein microorganism group mixture includes following composition by weight: 3 parts of bacillus, 4 parts of white-rot fungi, and Gordona amarae 5
Part；Solution agent includes following composition by weight: 60 parts of water, 12 parts of ammonium hydrogen carbonate, 10 parts of calcium phosphate, 8 parts of potassium sulfate.
A kind of heavy metal-polluted soil renovation technique, comprising the following steps:
S1: weighing proportion, and the raw material that heavy metal-polluted soil repairs medicament is weighed, and saves respectively spare；
S2: soil tentatively overturns, by the ferrous sulfate after proportion, calcium polysulfide, bloodstone, iron powder, vulcanized sodium, chlorination
Tie Tong crosses sowing apparatus and sows soil surface, then carries out preliminary scarifying processing to soil using arable land equipment, will sow
The medicament of soil surface is dissolved into soil；
S3: soil crushes, and the nano zero valence iron after proportion, chitosan, microorganism group mixture use are sowed
Equipment is applied to soil surface, and carries out rotary tillage process to soil using rotary tillage equipment, soil is crushed, and further make medicine
Agent is merged with soil；
S4: each component of the lytic agent of proportion is put into mixing plant and is stirred by stirring and dissolving agent, stirring
Environment temperature be 16 degrees Celsius, pressure be 92 kPas, until lytic agent be in suspended liquid status；
S5: sowing lytic agent, and the lytic agent suspension after stirring is sprayed onto soil to be processed using spray appliance
Surface, repair process are completed.
Embodiment two
The present invention provides a kind of technical solution: a kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament, including following heavy
Amount component: 15 parts of nano zero valence iron, 21 parts of ferrous sulfate, 13 parts of calcium polysulfide, 7 parts of bloodstone, 15 parts of iron powder, 2 parts of vulcanized sodium,
8 parts of chitosan, 14 parts of iron chloride, 18 parts of microorganism group mixture, 160 parts of Solution agent.
Wherein microorganism group mixture includes following composition by weight: 5 parts of bacillus, 6 parts of white-rot fungi, and Gordona amarae 7
Part；Solution agent includes following composition by weight: 102 parts of water, 28 parts of ammonium hydrogen carbonate, 17 parts of calcium phosphate, 13 parts of potassium sulfate.
A kind of heavy metal-polluted soil renovation technique, comprising the following steps:
S1: weighing proportion, and the raw material that heavy metal-polluted soil repairs medicament is weighed, and saves respectively spare；
S2: soil tentatively overturns, by the ferrous sulfate after proportion, calcium polysulfide, bloodstone, iron powder, vulcanized sodium, chlorination
Tie Tong crosses sowing apparatus and sows soil surface, then carries out preliminary scarifying processing to soil using arable land equipment, will sow
The medicament of soil surface is dissolved into soil；
S3: soil crushes, and the nano zero valence iron after proportion, chitosan, microorganism group mixture use are sowed
Equipment is applied to soil surface, and carries out rotary tillage process to soil using rotary tillage equipment, soil is crushed, and further make medicine
Agent is merged with soil；
S4: each component of the lytic agent of proportion is put into mixing plant and is stirred by stirring and dissolving agent, stirring
Environment temperature be 22 degrees Celsius, pressure be 101 kPas, until lytic agent be in suspended liquid status；
S5: sowing lytic agent, and the lytic agent suspension after stirring is sprayed onto soil to be processed using spray appliance
Surface, repair process are completed.
Embodiment three
The present invention provides a kind of technical solution: a kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament, including following heavy
Amount component: 17 parts of nano zero valence iron, 26 parts of ferrous sulfate, 17 parts of calcium polysulfide, 9 parts of bloodstone, 19 parts of iron powder, 3 parts of vulcanized sodium,
11 parts of chitosan, 16 parts of iron chloride, 28 parts of microorganism group mixture, 180 parts of Solution agent.
Wherein microorganism group mixture includes following composition by weight: 7 parts of bacillus, 10 parts of white-rot fungi, and Gordona amarae
11；Solution agent includes following composition by weight: 112 parts of water, 30 parts of ammonium hydrogen carbonate, 20 parts of calcium phosphate, 18 parts of potassium sulfate.
A kind of heavy metal-polluted soil renovation technique, comprising the following steps:
S1: weighing proportion, and the raw material that heavy metal-polluted soil repairs medicament is weighed, and saves respectively spare；
S2: soil tentatively overturns, by the ferrous sulfate after proportion, calcium polysulfide, bloodstone, iron powder, vulcanized sodium, chlorination
Tie Tong crosses sowing apparatus and sows soil surface, then carries out preliminary scarifying processing to soil using arable land equipment, will sow
The medicament of soil surface is dissolved into soil；
S3: soil crushes, and the nano zero valence iron after proportion, chitosan, microorganism group mixture use are sowed
Equipment is applied to soil surface, and carries out rotary tillage process to soil using rotary tillage equipment, soil is crushed, and further make medicine
Agent is merged with soil；
S4: each component of the lytic agent of proportion is put into mixing plant and is stirred by stirring and dissolving agent, stirring
Environment temperature be 26 degrees Celsius, pressure be 108 kPas, until lytic agent be in suspended liquid status；
S5: sowing lytic agent, and the lytic agent suspension after stirring is sprayed onto soil to be processed using spray appliance
Surface, repair process are completed.
By comparing experiment to above-mentioned three groups of embodiments and traditional medicament, test result as shown in Figure 1, it can be found that
The ion concentration of soil after three groups of embodiment processing, Cr VI and pentavalent arsenic is greatly reduced, and removal rate reaches
98% or so, the present invention can be such that the heavy metal ion content in soil reduces in a short time, and drug effect is more lasting, and 1
The ion concentration of Cr VI and pentavalent arsenic does not obviously rebound in soil within year, can reduce the cost of soil remediation, improves
The effect of soil remediation.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of heavy-metal contaminated soil, which efficiently restores, repairs medicament, which is characterized in that including following composition by weight: nano zero-valence
It 8-18 parts of iron, 5-26 parts of ferrous sulfate, 3-17 parts of calcium polysulfide, 2-9 parts of bloodstone, 5-19 parts of iron powder, 1-3 parts of vulcanized sodium, takes off
3-11 parts of acetyl chitin, 2-16 parts of iron chloride, 9-38 parts of microorganism group mixture, 50-180 parts of Solution agent, wherein described
Microorganism group mixture includes following composition by weight: 2-7 parts of bacillus, 3-10 parts of white-rot fungi, 4-11 parts of Gordona amarae.
2. a kind of heavy-metal contaminated soil according to claim 1, which efficiently restores, repairs medicament, which is characterized in that described multiple
Closing lytic agent includes following composition by weight: 32-112 parts of water, 11-30 parts of ammonium hydrogen carbonate, and 6-20 parts of calcium phosphate, potassium sulfate 1-18
Part.
3. a kind of heavy metal-polluted soil renovation technique, which comprises the following steps:
S1: weighing proportion, and the raw material that the heavy-metal contaminated soil in claims 1 or 2 is efficiently restored to reparation medicament claims
Amount, and save respectively spare；
S2: soil tentatively overturns, by ferrous sulfate, calcium polysulfide, bloodstone, iron powder, vulcanized sodium, the chlorination Tie Tong after proportion
It crosses sowing apparatus and sows soil surface, preliminary scarifying processing then is carried out to soil using arable land equipment, will be sowed in soil
The medicament on surface is dissolved into soil；
S3: soil crushes, and equipment is sowed in the nano zero valence iron after proportion, chitosan, microorganism group mixture use,
It is applied to soil surface, and rotary tillage process is carried out to soil using rotary tillage equipment, soil is crushed, and further make medicament and soil
Earth fusion；
S4: each component of Solution agent of proportion is put into mixing plant and is stirred by stirring and dissolving agent, stirring
Environment temperature be 15-26 degrees Celsius, pressure be 88-112 kPas, until lytic agent be in suspended liquid status；
S5: sowing lytic agent, and the lytic agent suspension after stirring is sprayed onto soil surface to be processed using spray appliance,
Repair process is completed.
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| CN106734138A (en) * | 2017-03-22 | 2017-05-31 | 刘育含 | A kind of method of remediating lead-contaminated soil |
| CN107398472B (en) * | 2017-08-24 | 2019-11-29 | 航天凯天环保科技股份有限公司 | A kind of method that low temperature thermal desorption amalgamation stablizes reparation mercury contaminated soil |
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| CN108723073A (en) * | 2018-04-20 | 2018-11-02 | 华南理工大学 | A kind of method of modified Nano Zero-valent Iron collaboration microorganism remediation heavy-metal contaminated soil |
| CN111073651A (en) * | 2018-10-18 | 2020-04-28 | 南京化学工业园环保产业协同创新有限公司 | Soil heavy metal stabilizer and preparation method thereof |
| CN110179045A (en) * | 2019-05-30 | 2019-08-30 | 安徽稼仙金佳粮集团股份有限公司 | The processing method for eliminating metal ion in rice using bacterium colony |
| CN111073658A (en) * | 2019-11-21 | 2020-04-28 | 河北建设集团安装工程有限公司 | Heavy metal contaminated soil remediation agent and preparation method and application thereof |
| CN114292651A (en) * | 2021-12-23 | 2022-04-08 | 天津市地质研究和海洋地质中心 | Saline-alkali soil conditioner and application thereof |
| CN114736688A (en) * | 2022-01-05 | 2022-07-12 | 湖北省生态环境科学研究院(省生态环境工程评估中心) | Conditioner for reducing hexavalent chromium in soil and preparation method and preparation device thereof |
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