CN110238190A - A kind of heavy-metal contaminated soil restorative procedure based on microorganism - Google Patents
A kind of heavy-metal contaminated soil restorative procedure based on microorganism Download PDFInfo
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- CN110238190A CN110238190A CN201910399185.0A CN201910399185A CN110238190A CN 110238190 A CN110238190 A CN 110238190A CN 201910399185 A CN201910399185 A CN 201910399185A CN 110238190 A CN110238190 A CN 110238190A
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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
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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
- B09C2101/00—In situ
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Abstract
The present invention discloses a kind of heavy-metal contaminated soil restorative procedure based on microorganism, including is crushed to contaminated soil, then microorganism mixed bacteria is uniformly sprinkled into soil and is turned over by addition water-soluble metal chelating agent；Enclosure wall is set around heavy-metal contaminated soil, gives soil water supply；Extract the water on soil top out by water pump, water is filtered by heavy metals removal device；After last time water body is drained, dry to soil to moisture state；After applying stalk and organic fertilizer in the soil, earthworm is introduced；Multiple careless caves are dug out in soil, and worm method cultivation maggot is educated using straw, makes remaining heavy metal in maggot purification soil.Heavy metal in soil total amount can be effectively reduced using microorganism removal, heavy metals removal device, earthworm bioaccumulation and maggot enrichment, economical rationality simultaneously, and to quasi- reparation place is pollution-free and destruction, it is environmentally friendly, the pollution to soil is reduced, restores the activity of soil, heavy metals removal effect is preferable.
Description
Technical field
The present invention relates to heavy metal-polluted soil processing technology fields, and in particular to a kind of heavy metal polluted soil based on microorganism
Earth restorative procedure.
Background technique
Heavy metal pollution of soil (heavy metal pollution of the soil) refers to due to mankind's activity, soil
The content of minor metallic element in the soil in earth is more than background value, and too high levels caused by excess deposition are referred to as soil
Earth heavy metal pollution.
Heavy metal refers to the metal that specific gravity is equal to or more than 5.0, and the heavy metal of contaminated soil mainly includes mercury (Hg), cadmium
(Cd), the significant element of bio-toxicities such as lead (Pb), chromium (Cr) and metalloid arsenic (As), and have certain toxicity zinc (Zn),
The elements such as copper (Cu), nickel (Ni).Mainly from pesticide, waste water, sludge and atmospheric sedimentation etc., if mercury is mainly from mercury-containing waste water,
Cadmium, lead contamination mainly from smelt discharge and automobile exhaust gas sedimentation, arsenic be then widely used as insecticide, fungicide, rat poison and
Herbicide.Excessive heavy metal can cause physiological function of plants disorder, trophic disturbance, and the elements such as cadmium, mercury are enriched in crop grain
Coefficient is higher, even more than food hygienic standard, nor affects on plant growth, development and yield, furthermore mercury, arsenic can weaken and press down
Nitrification, amonifying bacteria activity, influence Nitrogen supplying in soil processed.Heavy metal contaminants mobility very little in the soil, be not easy with
Water leaching is not microbial degradation, and after entering human body by food chain, potential hazard is very big, it should be specifically noted that preventing heavy metal
To soil pollution.Stone grand style and Tailings Dam are not yet established in some mines in exploitation, and barren rock and tailing are arbitrarily stacked, and cause tailing
In rich in the heavy metal that is difficult to resolve enter soil, remaining metal waste residue with rainwater enters ground water regime after ore processing in addition,
Cause serious heavy metal pollution of soil.
Heavy metal pollution of soil has concealment, chronicity and irreversibility.Currently, countries in the world are all to a soil huge sum of money
Belong to pollution remediation technology to be studied extensively, main path there are 3 kinds: 1. changing heavy metal state, reduces its activity, keep its blunt
Change, is detached from food chain, reduces its toxicity；2. absorbing the heavy metal in soil using hyperaccumulative plant；3. will be weighed with engineering technology
Metal becomes soluble state, free state, using elution, the heavy metal in leacheate is then collected, to reach recycling heavy metal
With the purpose for reducing heavy metal in soil content.But above-mentioned three kinds of approach modes are more single, remove the effect of heavy metal-polluted soil
Fruit is unsatisfactory.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of heavy-metal contaminated soils based on microorganism
Restorative procedure, while microorganism removal, heavy metals removal device, being finally enriched with using earthworm bioaccumulation and maggot, economical rationality can
Effectively reduce heavy metal in soil total amount, and pollution-free to quasi- reparation place and destroy, it is environmentally friendly, reduce the dirt to soil
Dye, restores the activity of soil.
To achieve the goals above, the technical solution adopted by the present invention is that:
The present invention provides a kind of heavy-metal contaminated soil restorative procedure based on microorganism, comprising the following steps:
Step (1) is crushed contaminated soil, then addition water-soluble metal chelating agent uniformly spreads microorganism mixed bacteria
Enter in soil and is turned over；
Enclosure wall is arranged in step (2) around heavy-metal contaminated soil, and the height of enclosure wall is higher by soil 30-40cm, and enclosure wall is enterprising
One step connects waterpipe, is all impregnated with soil to water to soil water supply by waterpipe by the way of broad irrigation and is higher by
When soil 10cm or more, stops supplying water, wait 2-3 days；
Step (3), the water for extracting soil top after 2-3 days out by water pump, water are filtered by heavy metals removal device, are repeated
Step (1)-(2) are carried out, the water reflux after filterability repeats after reflux；
After step (4), last time water body are drained, dry to soil to moisture state；
Step (5) after applying stalk and organic fertilizer in the soil, introduces earthworm, during which waters daily, and keeping the soil moisture is 5
~32 DEG C, continue 1-2 months；
Step (6) digs out multiple careless caves in soil, is divided into 2-3m between adjacent grass cave, educates worm method cultivation maggot using straw,
Make remaining heavy metal in maggot purification soil, flies away after maggot adult.
Preferably, microorganism fungus kind includes Thiobacillus ferrooxidans, Thiobacillus thioxidans, desulphurization in the step (1)
Thiobacillus, head mold, Escherichia coli, trichoderma, penicillium spinulosum it is one or more.
In any of the above-described scheme preferably, filler chamber is equipped in step (3) the heavy metals removal device, in filler chamber
Portion is equipped with water inlet, and lower part is equipped with water outlet, filler, the side that the filler enters according to runoff rainwater is arranged in the filler chamber
To sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers are followed successively by from top to bottom, geotextiles conduct is arranged in each interlayer
Permeable interlayer.Zero-valent Iron layers of balls is the main removal layer of object of depolluting.Pass through the absorption of Zero-valent Iron, redox and catalysis reduction
The effects of, remove most of heavy metal and polycyclic aromatic hydrocarbon.Zeroth order iron ball can synchronize removal various heavy and polycyclic aromatic hydrocarbon.Zeroth order
Polycyclic aromatic hydrocarbon and heavy metal has been significantly greatly increased using the bigger serface of Zero-valent Iron iron ball in the setting of this novel-section bed of material of iron ball
Removal effect, improve treatment effeciency.Traditional filtrate (natural sand, sandstone, gravel etc.) is solved to the removal energy of heavy metal
Power is not as good as Conventional pollution and the problem of different metal removal rate differs greatly.
In any of the above-described scheme preferably, the sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers
Thickness ratio is 2~3:1:2~3:3~6:5~7.
In any of the above-described scheme preferably, the sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers
Thickness ratio is 2:1:2:3:5.
In any of the above-described scheme preferably, the sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers
Thickness ratio is 2.5:1:2.5:4:6.
In any of the above-described scheme preferably, the sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers
Thickness ratio is 3:1:3:6:7
In any of the above-described scheme preferably, the raw material for preparing the zeroth order iron ball includes nano zero-valence iron powder, the nanometer zero
The diameter of valence iron powder is 336~337nm.
In any of the above-described scheme preferably, the filtrate of the sand bed includes the equal proportion mixing of husky, zeolite and quartz sand
Object, sand cross 80 meshes.
In any of the above-described scheme preferably, the filtrate of the float stone layer includes float stone, and the diameter of the float stone is 1.5 ±
0.5 cm。
In any of the above-described scheme preferably, the filtrate of the granule rock layers includes bird's-eye gravel, and the bird's-eye gravel diameter is 1
±0.5 cm。
In any of the above-described scheme preferably, supporting layer is set in granule rock layers lower part, the filtrate of supporting layer includes
Cobble, the diameter of the cobble are 2.5 ± 0.5cm.
In any of the above-described scheme preferably, straw educates the concrete operation method of worm method in the step (6) are as follows: by straw
It is cut into the segment that length is 3-6cm, boiling is added to boil 1-2 hours, after being embedded in careless cave, the sludge of 6-8cm and sealing on upper cap,
Watering is primary daily, keeps internal wet, after 8-10 days, maggot is born.
In any of the above-described scheme preferably, the grass cave is 80-100cm × 80-100cm, depth 25-35cm.
The beneficial effects of the present invention are:
The present invention provides a kind of heavy-metal contaminated soil restorative procedure based on microorganism, while using microorganism removal, a huge sum of money
Heavy metal in soil total amount can be effectively reduced by belonging to removal device, earthworm bioaccumulation and maggot enrichment, economical rationality, and to quasi- reparation field
Ground is pollution-free and destroys, environmentally friendly, reduces the pollution to soil, restores the activity of soil, heavy metals removal effect is preferable.
Specific embodiment
Embodiment 1
The present invention provides a kind of heavy-metal contaminated soil restorative procedure based on microorganism, comprising the following steps:
Step (1) is crushed contaminated soil, and addition water-soluble metal chelating agent then (can be with by microorganism mixed bacteria
For dry powder, additive amount is 0.05-2g per acre, and solution use is made after can also activating) uniformly it is sprinkled into soil and is turned over
It ploughs, microorganism fungus kind includes Thiobacillus ferrooxidans, Thiobacillus thioxidans, grate sulfur thiobacillus, head mold, Escherichia coli, trichoderma, small
Tattoo is mould, the ratio Thiobacillus ferrooxidans of each strain: Thiobacillus thioxidans: grate sulfur thiobacillus: head mold: Escherichia coli: wood
It is mould: penicillium spinulosum 3:3:3:2:1:2:1；
Enclosure wall is arranged in step (2) around heavy-metal contaminated soil, and the height of enclosure wall is higher by soil 30-40cm, and enclosure wall is enterprising
One step connects waterpipe, is all impregnated with soil to water to soil water supply by waterpipe by the way of broad irrigation and is higher by
When soil 10cm or more, stops supplying water, wait 2-3 days, during which can be stirred every two hours；
Step (3), the water for extracting soil top after 2-3 days out by water pump, water are filtered by heavy metals removal device, are repeated
Step (1)-(2) are carried out, the water reflux after filterability repeats after reflux；
After step (4), last time water body are drained, dry to soil to moisture state；
Step (5) after applying stalk and organic fertilizer in the soil, introduces earthworm, during which waters daily, and keeping the soil moisture is 5
~32 DEG C, continue 1-2 months；
Step (6) digs out multiple careless caves in soil, is divided into 2-3m between adjacent grass cave, educates worm method cultivation maggot using straw,
Make remaining heavy metal in maggot purification soil, flies away after maggot adult.Straw educates the concrete operation method of worm method are as follows: by straw
It is cut into the segment that length is 3-6cm, boiling is added to boil 1-2 hours, after being embedded in careless cave, the sludge of 6-8cm and sealing on upper cap,
Watering is primary daily, keeps internal wet, after 8-10 days, maggot is born.Careless cave is 80-100cm × 80-100cm, and depth is
25-35cm。
Filler chamber is equipped in heavy metals removal device, filler chamber top is equipped with water inlet, and lower part is equipped with water outlet, described to fill out
Expect indoor setting filler, the direction that the filler enters according to runoff rainwater is followed successively by sand bed from top to bottom, Zero-valent Iron layers of balls, floats
Rock layers, charcoal layer and granule rock layers, each interlayer setting geotextiles are as permeable interlayer.Sand bed, Zero-valent Iron layers of balls, float stone layer, wood
The thickness of layer of charcoal and granule rock layers ratio is 2:1:2:3:5.
The raw material for preparing the zeroth order iron ball includes nano zero-valence iron powder, and the diameter of the nano zero-valence iron powder is 336~
337nm。
The filtrate of sand bed includes husky, zeolite and quartz sand equal proportion mixture, and sand crosses 80 meshes.
The filtrate of float stone layer includes float stone, and the diameter of the float stone is 1.5 ± 0.5 cm.
The filtrate of granule rock layers includes bird's-eye gravel, and the bird's-eye gravel diameter is 1 ± 0.5 cm.
Supporting layer is set in granule rock layers lower part, the filtrate of supporting layer includes cobble, and the diameter of the cobble is 2.5
±0.5cm。
Embodiment 2
The present invention provides a kind of heavy-metal contaminated soil restorative procedure based on microorganism, comprising the following steps:
Step (1) is crushed contaminated soil, then addition water-soluble metal chelating agent uniformly spreads microorganism mixed bacteria
Enter in soil and turned over, microorganism fungus kind includes Thiobacillus ferrooxidans, Thiobacillus thioxidans, grate sulfur thiobacillus, root
Mould, Escherichia coli, trichoderma, penicillium spinulosum, the ratio Thiobacillus ferrooxidans of each strain: Thiobacillus thioxidans: desulphurization sulphur bar
Bacterium: head mold: Escherichia coli: trichoderma: penicillium spinulosum 2:2:2:2:1:2:1；
Enclosure wall is arranged in step (2) around heavy-metal contaminated soil, and the height of enclosure wall is higher by soil 30-40cm, and enclosure wall is enterprising
One step connects waterpipe, is all impregnated with soil to water to soil water supply by waterpipe by the way of broad irrigation and is higher by
When soil 10cm or more, stops supplying water, wait 2-3 days, during which can be stirred every two hours；
Step (3), the water for extracting soil top after 2-3 days out by water pump, water are filtered by heavy metals removal device, are repeated
Step (1)-(2) are carried out, the water reflux after filterability repeats after reflux；
After step (4), last time water body are drained, dry to soil to moisture state；
Step (5) after applying stalk and organic fertilizer in the soil, introduces earthworm, during which waters daily, and keeping the soil moisture is 5
~32 DEG C, continue 1-2 months；
Step (6) digs out multiple careless caves in soil, is divided into 2-3m between adjacent grass cave, educates worm method cultivation maggot using straw,
Make remaining heavy metal in maggot purification soil, flies away after maggot adult.Straw educates the concrete operation method of worm method are as follows: by straw
It is cut into the segment that length is 3-6cm, boiling is added to boil 1-2 hours, after being embedded in careless cave, the sludge of 6-8cm and sealing on upper cap,
Watering is primary daily, keeps internal wet, after 8-10 days, maggot is born.Careless cave is 80-100cm × 80-100cm, and depth is
25-35cm。
Filler chamber is equipped in heavy metals removal device, filler chamber top is equipped with water inlet, and lower part is equipped with water outlet, described to fill out
Expect indoor setting filler, the direction that the filler enters according to runoff rainwater is followed successively by sand bed from top to bottom, Zero-valent Iron layers of balls, floats
Rock layers, charcoal layer and granule rock layers, each interlayer setting geotextiles are as permeable interlayer.Sand bed, Zero-valent Iron layers of balls, float stone layer, wood
The thickness of layer of charcoal and granule rock layers ratio is 2.5:1:2.5:4:6.
The raw material for preparing the zeroth order iron ball includes nano zero-valence iron powder, and the diameter of the nano zero-valence iron powder is 336~
337nm。
The filtrate of sand bed includes husky, zeolite and quartz sand equal proportion mixture, and sand crosses 80 meshes.
The filtrate of float stone layer includes float stone, and the diameter of the float stone is 1.5 ± 0.5 cm.
The filtrate of granule rock layers includes bird's-eye gravel, and the bird's-eye gravel diameter is 1 ± 0.5 cm.
Supporting layer is set in granule rock layers lower part, the filtrate of supporting layer includes cobble, and the diameter of the cobble is 2.5
±0.5cm。
Embodiment 3
The present invention provides the present invention and provides a kind of heavy-metal contaminated soil restorative procedure based on microorganism, comprising the following steps:
Step (1) is crushed contaminated soil, then addition water-soluble metal chelating agent uniformly spreads microorganism mixed bacteria
Enter in soil and turned over, microorganism fungus kind includes Thiobacillus ferrooxidans, Thiobacillus thioxidans, grate sulfur thiobacillus, root
Mould, Escherichia coli, trichoderma, penicillium spinulosum, the ratio Thiobacillus ferrooxidans of each strain: Thiobacillus thioxidans: desulphurization sulphur bar
Bacterium: head mold: Escherichia coli: trichoderma: penicillium spinulosum 4:4:4:2:1:2:1；
Enclosure wall is arranged in step (2) around heavy-metal contaminated soil, and the height of enclosure wall is higher by soil 30-40cm, and enclosure wall is enterprising
One step connects waterpipe, is all impregnated with soil to water to soil water supply by waterpipe by the way of broad irrigation and is higher by
When soil 10cm or more, stops supplying water, wait 2-3 days, during which can be stirred every two hours；
Step (3), the water for extracting soil top after 2-3 days out by water pump, water are filtered by heavy metals removal device, are repeated
Step (1)-(2) are carried out, the water reflux after filterability repeats after reflux；
After step (4), last time water body are drained, dry to soil to moisture state；
Step (5) after applying stalk and organic fertilizer in the soil, introduces earthworm, during which waters daily, and keeping the soil moisture is 5
~32 DEG C, continue 1-2 months；
Step (6) digs out multiple careless caves in soil, is divided into 2-3m between adjacent grass cave, educates worm method cultivation maggot using straw,
Make remaining heavy metal in maggot purification soil, flies away after maggot adult.Straw educates the concrete operation method of worm method are as follows: by straw
It is cut into the segment that length is 3-6cm, boiling is added to boil 1-2 hours, after being embedded in careless cave, the sludge of 6-8cm and sealing on upper cap,
Watering is primary daily, keeps internal wet, after 8-10 days, maggot is born.Careless cave is 80-100cm × 80-100cm, and depth is
25-35cm。
Filler chamber is equipped in heavy metals removal device, filler chamber top is equipped with water inlet, and lower part is equipped with water outlet, described to fill out
Expect indoor setting filler, the direction that the filler enters according to runoff rainwater is followed successively by sand bed from top to bottom, Zero-valent Iron layers of balls, floats
Rock layers, charcoal layer and granule rock layers, each interlayer setting geotextiles are as permeable interlayer.Sand bed, Zero-valent Iron layers of balls, float stone layer, wood
The thickness of layer of charcoal and granule rock layers ratio is 3:1:3:6:7
The raw material for preparing the zeroth order iron ball includes nano zero-valence iron powder, and the diameter of the nano zero-valence iron powder is 336~
337nm。
The filtrate of sand bed includes husky, zeolite and quartz sand equal proportion mixture, and sand crosses 80 meshes.
The filtrate of float stone layer includes float stone, and the diameter of the float stone is 1.5 ± 0.5 cm.
The filtrate of granule rock layers includes bird's-eye gravel, and the bird's-eye gravel diameter is 1 ± 0.5 cm.
Supporting layer is set in granule rock layers lower part, the filtrate of supporting layer includes cobble, and the diameter of the cobble is 2.5
±0.5cm。
Comparative example 1
Unlike a kind of heavy-metal contaminated soil restorative procedure and embodiment 2 based on microorganism, microorganism fungus kind includes oxygen
Change ferrous Thiobacillus, Thiobacillus thioxidans, grate sulfur thiobacillus, head mold, Escherichia coli, trichoderma, penicillium spinulosum, the ratio of each strain
Example Thiobacillus ferrooxidans: Thiobacillus thioxidans: grate sulfur thiobacillus: head mold: Escherichia coli: trichoderma: penicillium spinulosum 5:5:5:
2:1:2:1。
Comparative example 2
Unlike a kind of heavy-metal contaminated soil restorative procedure and embodiment 2 based on microorganism, in step (3), water is obstructed
Overweight metal removal device is filtered, and is directly flowed back.
Comparative example 3
Unlike a kind of heavy-metal contaminated soil restorative procedure and embodiment 2 based on microorganism, the filler is according to runoff
The direction that rainwater enters is followed successively by sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers from top to bottom, and each interlayer is set
Geotextiles are set as permeable interlayer.Sand bed, Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers thickness ratio be 2.5:
0.5: 2.5:4:6。
Different types of heavy metal removing rate and heavy metal total removal rate result be such as in embodiment 2~4 and comparative example 1~3
Shown in table 1, the microorganism fungus kind ratio of comparative example 1 is adjusted, and the obstructed overweight metal removal device of the water of comparative example 2 carries out
Filtering directly flows back, and each interlayer ratio of the filler of comparative example 1 is adjusted.
The results are shown in Table 1:
1 heavy metal removing rate contrast table of table
As can be seen from the data in table 1, the soil remediation method heavy metal removing rate of embodiment 1-3 is higher, the total removal rate of embodiment 2
The total removal rate of highest, comparative example 1-3 is poor.
It is provided for the embodiments of the invention technical solution above to be described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention are expounded, the explanation of above embodiments is only applicable to help to understand this
The principle of inventive embodiments；At the same time, for those skilled in the art, according to an embodiment of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of heavy-metal contaminated soil restorative procedure based on microorganism, which comprises the following steps:
Step (1) is crushed contaminated soil, then addition water-soluble metal chelating agent uniformly spreads microorganism mixed bacteria
Enter in soil and is turned over；
Enclosure wall is arranged in step (2) around heavy-metal contaminated soil, and the height of enclosure wall is higher by soil 30-40cm, and enclosure wall is enterprising
One step connects waterpipe, is all impregnated with soil to water to soil water supply by waterpipe by the way of broad irrigation and is higher by
When soil 10cm or more, stops supplying water, wait 2-3 days；
Step (3), the water for extracting soil top after 2-3 days out by water pump, water are filtered by heavy metals removal device, are repeated
Step (1)-(2) are carried out, the water reflux after filterability repeats after reflux；
After step (4), last time water body are drained, dry to soil to moisture state；
Step (5) after applying stalk and organic fertilizer in the soil, introduces earthworm, during which waters daily, and keeping the soil moisture is 5
~32 DEG C, continue 1-2 months；
Step (6) digs out multiple careless caves in soil, is divided into 2-3m between adjacent grass cave, educates worm method cultivation maggot using straw,
Make remaining heavy metal in maggot purification soil, flies away after maggot adult.
2. a kind of heavy-metal contaminated soil restorative procedure based on microorganism according to claim 1, which is characterized in that institute
Stating microorganism fungus kind in step (1) includes Thiobacillus ferrooxidans, Thiobacillus thioxidans, grate sulfur thiobacillus, head mold, large intestine bar
Bacterium, trichoderma, penicillium spinulosum it is one or more.
3. a kind of heavy-metal contaminated soil restorative procedure based on microorganism according to claim 1, which is characterized in that institute
It states and is equipped with filler chamber in step (3) heavy metals removal device, filler chamber top is equipped with water inlet, and lower part is equipped with water outlet, described
In filler chamber be arranged filler, the direction that the filler enters according to runoff rainwater be followed successively by from top to bottom sand bed, Zero-valent Iron layers of balls,
Float stone layer, charcoal layer and granule rock layers, each interlayer setting geotextiles are as permeable interlayer.
4. the heavy-metal contaminated soil restorative procedure based on microorganism according to claim 3, it is characterized in that: the sand bed,
Zero-valent Iron layers of balls, float stone layer, charcoal layer and granule rock layers thickness ratio be 2~3:1:2~3:3~6:5~7.
5. the heavy-metal contaminated soil restorative procedure according to claim 3 based on microorganism, it is characterised in that: preparation institute
The raw material for stating zeroth order iron ball includes nano zero-valence iron powder, and the diameter of the nano zero-valence iron powder is 336~337nm.
6. the heavy-metal contaminated soil restorative procedure according to claim 3 based on microorganism, it is characterised in that: the sand
The filtrate of layer includes husky, zeolite and quartz sand equal proportion mixture, and sand crosses 80 meshes.
7. the heavy-metal contaminated soil restorative procedure according to claim 3 based on microorganism, it is characterised in that: described floating
The filtrate of rock layers includes float stone, and the diameter of the float stone is 1.5 ± 0.5 cm.
8. the heavy-metal contaminated soil restorative procedure according to claim 3 based on microorganism, it is characterised in that: described thin
The filtrate of gravel layer includes bird's-eye gravel, and the bird's-eye gravel diameter is 1 ± 0.5 cm.
9. the heavy-metal contaminated soil restorative procedure according to claim 3 based on microorganism, it is characterised in that: described
Supporting layer is arranged in granule rock layers lower part, and the filtrate of supporting layer includes cobble, and the diameter of the cobble is 2.5 ± 0.5cm.
10. a kind of heavy-metal contaminated soil restorative procedure based on microorganism according to claim 1, which is characterized in that
Straw educates the concrete operation method of worm method in the step (6) are as follows: straw is cut into the segment that length is 3-6cm, boiling is added to boil
1-2 hours, after being embedded in careless cave, the sludge of 6-8cm and sealing on upper cap, watering was primary daily, kept internal wet, 8-10
After it, maggot is born.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112840785A (en) * | 2020-12-31 | 2021-05-28 | 湖北环境修复与治理技术研究有限公司 | Method for restoring heavy metal polluted soil in shrimp rice field |
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| CN205258063U (en) * | 2015-12-11 | 2016-05-25 | 北京建筑大学 | Be arranged in multiple heavy metal of runoff rainwater and polycyclic aromatic hydrocarbons remove device in coordination |
| CN105945047A (en) * | 2016-07-10 | 2016-09-21 | 中山市绿浪助剂有限公司 | Comprehensive remediation method for soil polluted by heavy metals and application of comprehensive remediation method |
| CN106269831A (en) * | 2016-08-30 | 2017-01-04 | 夏百庆 | A kind of method of quick improvement heavy metal pollution of soil |
| CN106433680A (en) * | 2016-10-20 | 2017-02-22 | 江苏东南生物科技有限公司 | Soil remediation agent |
| CN107685070A (en) * | 2017-11-02 | 2018-02-13 | 新乡学院 | A kind of heavy metal-polluted soil purification method based on ornamental plant and microorganism |
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2019
- 2019-05-14 CN CN201910399185.0A patent/CN110238190A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205258063U (en) * | 2015-12-11 | 2016-05-25 | 北京建筑大学 | Be arranged in multiple heavy metal of runoff rainwater and polycyclic aromatic hydrocarbons remove device in coordination |
| CN105945047A (en) * | 2016-07-10 | 2016-09-21 | 中山市绿浪助剂有限公司 | Comprehensive remediation method for soil polluted by heavy metals and application of comprehensive remediation method |
| CN106269831A (en) * | 2016-08-30 | 2017-01-04 | 夏百庆 | A kind of method of quick improvement heavy metal pollution of soil |
| CN106433680A (en) * | 2016-10-20 | 2017-02-22 | 江苏东南生物科技有限公司 | Soil remediation agent |
| CN107685070A (en) * | 2017-11-02 | 2018-02-13 | 新乡学院 | A kind of heavy metal-polluted soil purification method based on ornamental plant and microorganism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112840785A (en) * | 2020-12-31 | 2021-05-28 | 湖北环境修复与治理技术研究有限公司 | Method for restoring heavy metal polluted soil in shrimp rice field |
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