CN107815316A - A kind of renovation agent, its preparation method and the method with its restoration of soil polluted by heavy metal - Google Patents
A kind of renovation agent, its preparation method and the method with its restoration of soil polluted by heavy metal Download PDFInfo
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- CN107815316A CN107815316A CN201711076050.8A CN201711076050A CN107815316A CN 107815316 A CN107815316 A CN 107815316A CN 201711076050 A CN201711076050 A CN 201711076050A CN 107815316 A CN107815316 A CN 107815316A
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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
- B09C1/08—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
- B09C2101/00—In situ
Abstract
The invention discloses a kind of renovation agent, its preparation method and the method with its restoration of soil polluted by heavy metal, belongs to remediating heavy metal soil pollution technical field, described renovation agent, including following raw material：Biological carbon, sepiolite, calcium dihydrogen phosphate, bagasse, pulverized limestone, longan skin, tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan, beans root straw.Described renovation agent is by made from the steps such as powder processed, fermentation, drying powder.The renovation agent preparation technology of the present invention is simple, using the renovation agent restoration of soil polluted by heavy metal of the present invention, can improve the clearance of mercury, cadmium, lead, arsenic, pyrene.
Description
【Technical field】
The invention belongs to remediating heavy metal soil pollution technical field, and in particular to a kind of renovation agent, its preparation method with
And the method with its restoration of soil polluted by heavy metal.
【Background technology】
China mainland is by nearly 20,000,000 hectares of the cultivated area of heavy metal pollution at present.The 1/5 of total cultivated area is accounted for, with
The continuous development of industrial or agricultural, heavy metal pollution of soil is still aggravating, especially in mining, processing transport, use, waste processing
During, substantial amounts of heavy metal is as various channels have finally flowed into soil and cause seriously to pollute.Heavy metal in soil
Entered with active ionic condition in water body and plant, animal body, and then pass through food chain harmful to human and the health of animal.Cause
This heavy metal pollution reparation has caused related governmental departments and the highest attention of professional.
Existing chemical remediation technology has in terms of the reparation of heavy-metal contaminated soil to have certain effect, but also has larger
Limitation.A kind of for example, Chinese patent application document " heavy-metal contaminated soil renovation agent " (publication number：
CN201611024221 a kind of heavy-metal contaminated soil renovation agent) is disclosed, is consisted of the following composition by weight：Biological carbon
35-55%, sepiolite 10-20%, water-soluble solid organic acid 5-10%, calcium dihydrogen phosphate 5-10%, thiosulfate 10-
20%th, surplus is the natural gypsum.Although the heavy metal pollution renovation agent can repair various heavy contaminated soil, mercury, cadmium,
Lead, arsenic, the clearance of pyrene are relatively low, and comprehensive repair effect is bad.
【The content of the invention】
It is the technical problem to be solved in the present invention is to provide a kind of renovation agent, its preparation method and dirty with its remediating heavy metal
The method of soil is contaminated, to solve in a kind of Chinese patent application document " heavy-metal contaminated soil renovation agent " (publication number：
CN201611024221 on the basis of renovation agent disclosed in), how optimize technique, improve mercury, cadmium, lead, arsenic, the clearance of pyrene, make
Obtain repairing effect superior technique problem.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of renovation agent, including following raw material：Including following raw material：Biological carbon, sepiolite, calcium dihydrogen phosphate, bagasse,
Pulverized limestone, longan skin, tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan, beans root straw；
The weight ratio of the phosphonic acids ︰ lignin sulfonic acid potassium ︰ malic acid of hydroxy ethylidene three is (50-60) ︰ (25-30) ︰ (45-
60)。
Preferably, the beans root straw are the one or more in soya bean root straw, black soya bean root straw, red bean root straw；
The present invention also provides a kind of preparation method of renovation agent, comprises the following steps：
S1, powder processed：Longan skin, beans root straw are first crushed into obtained mixed powder by weight proportion；
S2, fermentation：Under conditions of being 35-50 DEG C in temperature by mixed powder made from step S1, biological carbon, sepiolite,
Calcium dihydrogen phosphate, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place and are fermented under anoxia condition
12-18h, tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan are then added under aerobic environment and is stirred
Mix and uniformly continue the 1-3h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,20- is dried under conditions of being 50-70 DEG C in temperature
35min, it is less than 20% to renovation agent semi-finished product water content, renovation agent is made.
Preferably, it by the weight ratio of longan Pi ︰ beans root straw is (10-20) ︰ (13-20) that the mixing refining in step S1, which is,
Made from co-grinding.
Preferably, mixed powder crosses 600-800 mesh sieve described in step S1.
The present invention also provides a kind of method of renovation agent restoration of soil polluted by heavy metal：Obtained renovation agent is pressed into 0.45-
0.55kg/m2Amount be uniformly sprinkling upon on contaminated soil, renovation agent and soil are uniformly turned over, and is sprinkled water to soil to soil water-containing
Measure as 30-35%.
The invention has the advantages that：
(1) from embodiment 1-4 data, embodiment 2 is optimum embodiment, and mercury, cadmium, lead, arsenic, the clearance of pyrene are comprehensive
It is best to close effect.
(2) from embodiment 2 and comparative example 1-4 data, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid
Addition serves synergy in renovation agent is prepared simultaneously, significantly improves the clearance of mercury, cadmium, lead, arsenic, pyrene, and this may
It is：The active group of lignin sulfonic acid potassium molecule is combined with hydroxy ethylidene triphosphine acid molecule, and to possess hydroxy ethylidene tri methylene phosphonic acid certain
Suction-operated, enhance hydroxy ethylidene tri methylene phosphonic acid and mercury, cadmium, lead, arsenic, the complexing of pyrene ion, hydroxy ethylidene tri methylene phosphonic acid tool
Have preferable complexing, it is less toxic, nuisanceless, can with the various metals ion forming complex such as mercury, cadmium, lead, arsenic, pyrene, in work
Sprinkling can slowly decompose under property material existence condition；Lignin sulfonic acid potassium can be dissolved in hard water, and chemical stability is good, have one again
Determine the dispersiveness of degree, adsorptivity, various active groups be present in institutional framework, form unimolecule or polymolecular adsorbed film, can carry
Mercuric chloride, cadmium, lead, arsenic, the exchange interaction of pyrene ion；Coordination occurs between malic acid energy and mercury, cadmium, lead, arsenic, pyrene ion,
The higher complex of dissolubility is produced, reduces suction-operated of the soil particle to mercury, cadmium, lead, arsenic, pyrene ion.Work as hydroxy ethylidene
When tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid compatible use, lignin sulfonic acid potassium permeates malic acid in soil, promotes apple
Occur coordination between tartaric acid and mercury, cadmium, lead, arsenic, pyrene ion, the higher complex of generation dissolubility, at this time with it is wooden
The active group of plain potassium sulfonate molecule is combined with hydroxy ethylidene triphosphine acid molecule allows hydroxy ethylidene tri methylene phosphonic acid to be generated in soil
Complex adsorption come, hydroxy ethylidene tri methylene phosphonic acid can repair contaminated by heavy metals soil by the complexing of higher efficiency
Earth, so as to embody the collaboration that hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid while addition are played in renovation agent is prepared
Effect.
(3) from embodiment 1-4 and the data of comparative example 5, using embodiment 1-4 renovation agent repair by a huge sum of money
Belong to contaminated soil, mercury, cadmium, lead, arsenic, the clearance of pyrene are significantly higher than the mercury of comparative example 5, cadmium, lead, arsenic, the clearance of pyrene, explanation
Carry out repairing the repairing effect of contaminated by heavy metals soil using embodiment 1-4 renovation agent than repairing using comparative example 5
The repairing effect that multiple agent repair contaminated by heavy metals soil is good.
【Embodiment】
For ease of more fully understanding the present invention, it is illustrated by following instance, these examples belong to the protection of the present invention
Scope, but do not limit the scope of the invention.
In embodiment, the renovation agent, in units of parts by weight, including following raw material：Biological carbon 10-15 parts, Hai Pao
Stone 10-20 parts, calcium dihydrogen phosphate 15-20 parts, bagasse 10-20 parts, pulverized limestone 10-15 parts, longan skin 10-20 parts, tartaric acid
30-35 parts, hydroxy ethylidene tri methylene phosphonic acid 50-60 parts, lignin sulfonic acid potassium 25-30 parts, malic acid 45-60 parts, chitosan 5-10 parts,
Beans root straw 13-20 parts；
The beans root straw are the one or more in soya bean root straw, black soya bean root straw, red bean root straw；
The preparation method of described renovation agent, comprises the following steps：
S1, powder processed：First by longan skin, beans root straw co-grinding by weight proportion, 600-800 mesh sieve is crossed after crushing,
Mixed powder is made；
S2, fermentation：Under conditions of being 35-50 DEG C in temperature by mixed powder made from step S1, biological carbon, sepiolite,
Calcium dihydrogen phosphate, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place and are fermented under anoxia condition
12-18h, tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan are then added under aerobic environment,
Stir and continue the 1-3h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,20- is dried under conditions of being 50-70 DEG C in temperature
35min, it is less than 20% to renovation agent semi-finished product water content, renovation agent is made.
The method of the renovation agent restoration of soil polluted by heavy metal：Obtained renovation agent is pressed into 0.45-0.55kg/m2Amount
Uniformly be sprinkling upon on contaminated soil, renovation agent and soil uniformly turned over, and to soil sprinkle water to soil moisture content for 30-35% i.e.
Can.
Below by more specific embodiment, the present invention will be described.
Embodiment 1
A kind of renovation agent, in units of parts by weight, including following raw material：10 parts of biological carbon, 12 parts of sepiolite, biphosphate
16 parts of calcium, 11 parts of bagasse, 10 parts of pulverized limestone, 13 parts of longan skin, 30 parts of tartaric acid, 53 parts of hydroxy ethylidene tri methylene phosphonic acid, sulfomethylated lignin
Sour 25 parts of potassium, 47 parts of malic acid, 5 parts of chitosan, 13 parts of beans root straw；
The beans root straw are soya bean root straw；
The preparation method of described renovation agent, comprises the following steps：
S1, powder processed：First by longan skin, beans root straw co-grinding by weight proportion, 600- mesh sieve is crossed after crushing and is made
Mixed powder；
S2, fermentation：By mixed powder, biological carbon, sepiolite, phosphoric acid made from step S1 under conditions of being 35 DEG C in temperature
Calcium dihydrogen, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place the 12h that fermented under anoxia condition,
Then tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan are added under aerobic environment, is stirred
Continue the 1h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,20min is dried under conditions of being 50 DEG C in temperature,
It is 20% to renovation agent semi-finished product water content, renovation agent is made.
The method of the renovation agent restoration of soil polluted by heavy metal：Obtained renovation agent is pressed into 0.5kg/m2Amount uniformly spread
On contaminated soil, renovation agent and soil are uniformly turned over, and it is 30% to be sprinkled water to soil to soil moisture content.
Embodiment 2
A kind of renovation agent, in units of parts by weight, including following raw material：13 parts of biological carbon, 14 parts of sepiolite, biphosphate
19 parts of calcium, 15 parts of bagasse, 13 parts of pulverized limestone, 16 parts of longan skin, 33 parts of tartaric acid, 57 parts of hydroxy ethylidene tri methylene phosphonic acid, sulfomethylated lignin
Sour 29 parts of potassium, 54 parts of malic acid, 7 parts of chitosan, 17 parts of beans root straw；
The beans root straw are 8 parts of black soya bean root straw, 9 parts of red bean root straw,；
The preparation method of described renovation agent, comprises the following steps：
S1, powder processed：First by longan skin, beans root straw co-grinding by weight proportion, 700 mesh sieve are crossed after crushing and are made mixed
Close powder；
S2, fermentation：By mixed powder, biological carbon, sepiolite, phosphoric acid made from step S1 under conditions of being 45 DEG C in temperature
Calcium dihydrogen, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place the 16h that fermented under anoxia condition,
Then tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan are added under aerobic environment, is stirred
Continue the 2h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,30min is dried under conditions of being 60 DEG C in temperature,
It is 18.6% to renovation agent semi-finished product water content, renovation agent is made.
, the method for the renovation agent restoration of soil polluted by heavy metal：Obtained renovation agent is pressed into 0.55kg/m2Amount it is uniform
It is sprinkling upon on contaminated soil, renovation agent and soil is uniformly turned over, and it is 33% to be sprinkled water to soil to soil moisture content.
Embodiment 3
A kind of renovation agent, in units of parts by weight, including following raw material：14 parts of biological carbon, 16 parts of sepiolite, biphosphate
19 parts of calcium, 19 parts of bagasse, 14 parts of pulverized limestone, 17 parts of longan skin, 39 parts of tartaric acid, 53 parts of hydroxy ethylidene tri methylene phosphonic acid, lignin
27 parts of potassium sulfonate, 56 parts of malic acid, 9 parts of chitosan, 18 parts of beans root straw；
The beans root straw are black soya bean root straw；
The preparation method of described renovation agent, comprises the following steps：
S1, powder processed：First by longan skin, beans root straw co-grinding by weight proportion, 750 mesh sieve are crossed after crushing and are made mixed
Close powder；
S2, fermentation：By mixed powder, biological carbon, sepiolite, phosphoric acid made from step S1 under conditions of being 47 DEG C in temperature
Calcium dihydrogen, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place the 15h that fermented under anoxia condition,
Then tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan are added under aerobic environment, is stirred
Continue the 1h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,31min is dried under conditions of being 65 DEG C in temperature,
It is 19% to renovation agent semi-finished product water content, renovation agent is made.
, the method for the renovation agent restoration of soil polluted by heavy metal：Obtained renovation agent is pressed into 0.46kg/m2Amount it is uniform
It is sprinkling upon on contaminated soil, renovation agent and soil is uniformly turned over, and it is 30% to be sprinkled water to soil to soil moisture content.
Embodiment 4
A kind of renovation agent, in units of parts by weight, including following raw material：15 parts of biological carbon, 17 parts of sepiolite, biphosphate
16 parts of calcium, 20 parts of bagasse, 14 parts of pulverized limestone, 18 parts of longan skin, 33 parts of tartaric acid, 57 parts of hydroxy ethylidene tri methylene phosphonic acid, lignin
29 parts of potassium sulfonate, 60 parts of malic acid, 10 parts of chitosan, 20 parts of beans root straw；
The beans root straw are red bean root straw；
The preparation method of described renovation agent, comprises the following steps：
S1, powder processed：First by longan skin, beans root straw co-grinding by weight proportion, 800 mesh sieve are crossed after crushing and are made mixed
Close powder；
S2, fermentation：By mixed powder, biological carbon, sepiolite, phosphoric acid made from step S1 under conditions of being 50 DEG C in temperature
Calcium dihydrogen, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place the 18h that fermented under anoxia condition,
Then tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan are added under aerobic environment, is stirred
Continue the 3h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,35min is dried under conditions of being 70 DEG C in temperature,
It is 16.4% to renovation agent semi-finished product water content, renovation agent is made.
, the method for the renovation agent restoration of soil polluted by heavy metal：Obtained renovation agent is pressed into 0.5kg/m2Amount it is uniform
It is sprinkling upon on contaminated soil, renovation agent and soil is uniformly turned over, and it is 35% to be sprinkled water to soil to soil moisture content.
Comparative example 1
It is essentially identical with the preparation technology of embodiment 2, have only unlike prepare in the raw material of renovation agent and lack hydroxyl second
Pitch tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid.
Comparative example 2
It is essentially identical with the preparation technology of embodiment 2, have only unlike prepare in the raw material of renovation agent and lack hydroxyl second
Pitch tri methylene phosphonic acid.
Comparative example 3
It is essentially identical with the preparation technology of embodiment 2, have only unlike prepare in the raw material of renovation agent and lack lignin
Potassium sulfonate.
Comparative example 4
It is essentially identical with the preparation technology of embodiment 2, have only unlike prepare in the raw material of renovation agent and lack malic acid.
Comparative example 5
Using a kind of Chinese patent application document " heavy-metal contaminated soil renovation agent " (publication number：CN201611024221)
Embodiment 1-3 techniques prepare renovation agent.
Carry out repairing contaminated by heavy metals soil using embodiment 1-4 and comparative example 1-5 renovation agent, repair by a huge sum of money
It is basically identical to belong to contaminated soil, environment, after repairing 20 days, detects exchangeable species harmful components clearance in pedotheque, knot
Fruit see the table below：
(1) from embodiment 1-4 data, embodiment 2 is optimum embodiment, and mercury, cadmium, lead, arsenic, the clearance of pyrene are comprehensive
It is best to close effect.
(2) from embodiment 2 and comparative example 1-4 data, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid
Addition serves synergy in renovation agent is prepared simultaneously, significantly improves the clearance of mercury, cadmium, lead, arsenic, pyrene, and this may
It is：The active group of lignin sulfonic acid potassium molecule is combined with hydroxy ethylidene triphosphine acid molecule, and to possess hydroxy ethylidene tri methylene phosphonic acid certain
Suction-operated, enhance hydroxy ethylidene tri methylene phosphonic acid and mercury, cadmium, lead, arsenic, the complexing of pyrene ion, hydroxy ethylidene tri methylene phosphonic acid tool
Have preferable complexing, it is less toxic, nuisanceless, can with the various metals ion forming complex such as mercury, cadmium, lead, arsenic, pyrene, in work
Sprinkling can slowly decompose under property material existence condition；Lignin sulfonic acid potassium can be dissolved in hard water, and chemical stability is good, have one again
Determine the dispersiveness of degree, adsorptivity, various active groups be present in institutional framework, form unimolecule or polymolecular adsorbed film, can carry
Mercuric chloride, cadmium, lead, arsenic, the exchange interaction of pyrene ion；Coordination occurs between malic acid energy and mercury, cadmium, lead, arsenic, pyrene ion,
The higher complex of dissolubility is produced, reduces suction-operated of the soil particle to mercury, cadmium, lead, arsenic, pyrene ion.Work as hydroxy ethylidene
When tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid compatible use, lignin sulfonic acid potassium permeates malic acid in soil, promotes apple
Occur coordination between tartaric acid and mercury, cadmium, lead, arsenic, pyrene ion, the higher complex of generation dissolubility, at this time with it is wooden
The active group of plain potassium sulfonate molecule is combined with hydroxy ethylidene triphosphine acid molecule allows hydroxy ethylidene tri methylene phosphonic acid to be generated in soil
Complex adsorption come, hydroxy ethylidene tri methylene phosphonic acid can repair contaminated by heavy metals soil by the complexing of higher efficiency
Earth, so as to embody the collaboration that hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid while addition are played in renovation agent is prepared
Effect.
(3) from embodiment 1-4 and the data of comparative example 5, using embodiment 1-4 renovation agent repair by a huge sum of money
Belong to contaminated soil, mercury, cadmium, lead, arsenic, the clearance of pyrene are significantly higher than the mercury of comparative example 5, cadmium, lead, arsenic, the clearance of pyrene, explanation
Carry out repairing the repairing effect of contaminated by heavy metals soil using embodiment 1-4 renovation agent than repairing using comparative example 5
The repairing effect that multiple agent repair contaminated by heavy metals soil is good.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (6)
1. a kind of renovation agent, it is characterised in that including following raw material：Including following raw material：Biological carbon, sepiolite, biphosphate
Calcium, bagasse, pulverized limestone, longan skin, tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan, beans
Root straw；
The weight ratio of the phosphonic acids ︰ lignin sulfonic acid potassium ︰ malic acid of hydroxy ethylidene three is (50-60) ︰ (25-30) ︰ (45-60).
2. renovation agent according to claim 1, it is characterised in that the beans root straw are soya bean root straw, black soya bean root straw, red
One or more in beans root straw.
3. a kind of preparation method of renovation agent according to claim 1 or 2, it is characterised in that comprise the following steps：
S1, powder processed：Longan skin, beans root straw are first crushed into obtained mixed powder by weight proportion；
S2, fermentation：By mixed powder, biological carbon, sepiolite, phosphoric acid made from step S1 under conditions of being 35-50 DEG C in temperature
Calcium dihydrogen, bagasse, pulverized limestone, chitosan add after water stirs by weight proportion, place the 12- that fermented under anoxia condition
18h, tartaric acid, hydroxy ethylidene tri methylene phosphonic acid, lignin sulfonic acid potassium, malic acid, chitosan stirring are then added under aerobic environment
Uniformly continue the 1-3h that ferments, renovation agent semi-finished product are made；
S3, drying powder processed：By renovation agent semi-finished product made from step S2,20- is dried under conditions of being 50-70 DEG C in temperature
35min, it is less than 20% to renovation agent semi-finished product water content, renovation agent is made.
4. the preparation method of renovation agent according to claim 3, it is characterised in that the mixing refining in step S1 is by dragon
The weight ratio of Yan Pi ︰ beans root straw is (made from 10-20) ︰ (13-20) co-grinding.
5. the preparation method of renovation agent according to claim 3, it is characterised in that mixed powder mistake described in step S1
600-800 mesh sieve.
6. a kind of method of renovation agent restoration of soil polluted by heavy metal with described in claim 1 or 2, it is characterised in that will make
The renovation agent obtained presses 0.45-0.55kg/m2Amount be uniformly sprinkling upon on contaminated soil, renovation agent and soil are uniformly turned over, and gives
It is 30-35% that soil, which is sprinkled water to soil moisture content,.
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| CN107794049A (en) * | 2017-10-22 | 2018-03-13 | 长沙秋点兵信息科技有限公司 | Composite of used in soil remediation and preparation method thereof |
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| CN112403444A (en) * | 2020-11-20 | 2021-02-26 | 西南大学 | Modified biochar for reducing methyl mercury enrichment in rice and method |
| CN112403444B (en) * | 2020-11-20 | 2022-02-11 | 西南大学 | Modified biochar for reducing methyl mercury enrichment in rice and method |
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Application publication date: 20180320 |