CN109734421A - A kind of place heavy-metal contaminated soil disposal of resources method - Google Patents
A kind of place heavy-metal contaminated soil disposal of resources method Download PDFInfo
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Abstract
The present invention relates to heavy metals immobilization detoxification technology fields, and disclose a kind of place heavy-metal contaminated soil disposal of resources method, including clay ontology, aluminium oxide, strong acid, sandstone, silver powder, water, fuel cartridge, flame gun, air-cooler, scraper, kiln, quartz sand, sodium carbonate, nitrate double salt, silica and pulverizer, raw material in formula is respectively as follows: clay ontology 65%-70% by weight ratio, aluminium oxide 2%-3.5%, strong acid 3%-3.5%, sandstone 8%-10%, silver powder 0.01%-0.02%, water 7%-12%, quartz sand 0.2%-0.5%, sodium carbonate 0.2%-0.3%.The method is when implementing, pass through the leakage so as to avoid heavy metal, clay ontology is fabricated to adobe, adobe made of clay ontology is put into kiln and is fired, and then so that clay is transformed into brick, due to silver powder to the absorption of heavy metal and aluminium oxide to the package of heavy metal, and then be mothballed heavy-metal residual object can in brick always, and injury will not be generated to human body, so that this device be made to have the advantages of reparation target utilized to waste resource recovery.
Description
Technical field
The present invention relates to heavy metals immobilization detoxification technology field, specially a kind of place heavy-metal contaminated soil recycling
Method of disposal.
Background technique
Science and technology is a double-edged sword, and science and technology is grown rapidly since 20th century, promotes expanding economy, improves
The living standard of the people, however, at the same time, the mankind have also paid heavy cost.Due to Industrial " three Waste " motor-vehicle tail-gas
Discharge, sewage irrigation and pesticide, herbicide, the use of chemical fertilizer etc. and the development of mining industry, seriously polluted soil, water
Matter and atmosphere, it was reported that it is 56t that heavy metal Hg is discharged in China YouSe metallurgical industry in 1989, which into environment, and Cd 88t, As are
173t, Pb 226t.American scientist carried out chemical analysis to the soil of some highways and city, and wherein lead contains for discovery
Amount is out of sight, and reaches tens times or even hundred times of maximum magnitude, 2004, Xia Houlin et al. was according to Chinese Pharmacopoeia
2000 editions annex heavy metal inspection techniques and the Ministry of Foreign Trade and Economic Cooperation promulgate " medicinal plant and preparation inlet and outlet are green
Color professional standard " in the measuring method in relation to lead, cadmium, mercury, determine total metals in tablet of Corydalis tuber for alleviating pain, as a result lead, cadmium, mercury
Content has different degrees of exceeded.
There is ten thousand people of 3500-7700 drinking contaminated water, heavy metal pollution mesh in 125,000,000 populations of Bangladesh
It is preceding quite serious, to the very harmful of environment and biology, meanwhile, it is easily enriched with by food chain, therefore, has been drawn
The great attention of countries in the world scientist has been played, it is extremely urgent to solve this problem
The solidification detoxification of heavy metal is always Research Challenges, especially for weight in industrial sites heavy-metal contaminated soil
Metal detoxification research it is very few, currently, place heavy-metal contaminated soil disposition mainstream technology thinking be using dystopy sealing,
The engineering technology such as chemical leaching, the leacheate that technology cost of disposal height and the contaminated soil of dystopy sealing, elution generate,
There are security risks in transfer process, may cause secondary pollution；Therefore, a kind of place of low-cost high-efficiency how is found
Setting technology becomes the research hotspot of current heavy-metal contaminated soil disposal technology, and the soil in city industrial area plot is due to weight
Industry pollution, inside often have higher clay mineral and heavy-metal residual object, iron compound, calorize in soil
Object rich content is closed, however heavy-metal residual object will lead to the crops planted out in surface soil that heavy metal occurs always is residual
Stay exceeded problem.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of place heavy-metal contaminated soil disposal of resources method,
Have for the purpose of the innovation of contaminated soil key recovery technique and achievements conversion capability improving, it is dirty for the difference of place soil
Feature is contaminated, place heavy-metal contaminated soil resource technology is researched and developed, this disposal method utilizes oxygen based on vitrification
The change higher clay of aluminium component content is matrix, and brick body is made after mixed clay and contaminated soil, roasts at a certain temperature
After be fixed on heavy metal structures in brick body material, tested by Leaching, it is ensured that in brick body heavy metal release safety
Property, while brick body material obtained being made to meet brick body professional standard, it can be used as building and gardens roadbed brick body materials'use, reach
To the purpose of the resource utilization of heavy-metal contaminated soil, realize that without secondary pollution, pollution-free transfer, waste resource recovery utilize
Reparation target the advantages of, solve due to soil resource pollution cause environmental degradation and agricultural product content of beary metal exceeded
Problem.
(2) technical solution
To achieve the above object, the invention provides the following technical scheme: at a kind of place heavy-metal contaminated soil recycling
Set method, including clay ontology, aluminium oxide, strong acid, sandstone, silver powder, water, fuel cartridge, flame gun, air-cooler, scraper, kiln,
Quartz sand, sodium carbonate, nitrate double salt, silica and pulverizer, the raw material in formula are respectively as follows: clay by weight ratio
Ontology 65%-70%, aluminium oxide 2%-3.5%, strong acid 3%-3.5%, sandstone 8%-10%, silver powder 0.01%-0.02%,
Water 7%-12%, quartz sand 0.2%-0.5%, sodium carbonate 0.2%-0.3%, nitrate double salt 0.3%-0.35%, titanium dioxide
Silicon 2%-4%.
Device in formula is respectively fuel cartridge one by quantitative proportion, and flame gun one, air-cooler one, kiln one
It is a, scraper one, one, pulverizer.
Preferably, the clay ontology is passed through clay ontology using iron compound, the clay of aluminium compound rich content
Sunlight irradiates 15-24 hours, to make the moisture content in clay ontology lower than 1%, and then crushes to clay, until
The form of clay becomes powdered object of the diameter less than 3 millimeters, to complete the processing of clay ontology.
Preferably, the aluminium oxide is that ammonium bicarbonate soln and aluminum sulfate mix, ammonium bicarbonate soln and aluminum sulfate
Ratio be respectively as follows: ammonium bicarbonate soln 50%, aluminum sulfate 50%, by the way that ammonium bicarbonate soln and aluminum sulfate are blended in one
Rise, and then be stirred, when stirring, generates bubble, persistently stir 3-5 minute after bubble collapse aluminium hydroxide made
At, and then complete the production of aluminium oxide.
Preferably, the sandstone uses diameter for the natural sand stone within 5 millimeters, takes natural sand stone in water in water
Impregnated, immersion when it is 5-10 hours a length of, to dispel natural sand stone, and then complete the production of sandstone.
Preferably, the silver powder uses purity for 99.99% silver bullion, carries out milling processing to silver bullion, until silver bullion
Form becomes the silver powder that diameter is 0.01 mm in size, so that silver powder completes the process.
Preferably, the quartz sand is crushed using natural siliceous sand, and it is 1 milli that natural siliceous sand, which is crushed to diameter,
Granular substance within rice, and then graininess quartz sand is cleaned, it is removed by the mill stripping power between mechanical force and sand grains
Film iron, bonding and the mud impure mineral of quartz sand surface and further wipe it is broken not at the mineral aggregate of monomer, then through point
Grade operation achievees the effect that further purifying quartz sand, to complete the purification of quartz sand, and then completes the production of quartz sand.
Preferably, the silica is extracted using natural silica, and then is at diameter by Silica abrasive
0.1 mm in size it is powdered, to complete the production of silica.
Preferably, the sodium carbonate uses salt, ammonium hydroxide and carbon dioxide for raw material, by ammonia and water and carbon dioxide
Reaction generates the ammonium hydrogen carbonate of a molecule, and ammonium hydrogen carbonate reacts the sodium bicarbonate precipitating generated and ammonium chloride, carbonic acid with sodium chloride
It is sodium bicarbonate solid to be obtained by filtration, and then to sodium bicarbonate solid because its solubility is smaller why hydrogen sodium, which precipitates,
Cool down, make the temperature of sodium bicarbonate solid be reduced to 30 ° hereinafter, being smashed and ground in turn to sodium bicarbonate solid, carbon
The form of sour hydrogen sodium solid becomes powder, to complete the processing of sodium carbonate.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of place heavy-metal contaminated soil disposal of resources method, have
Below the utility model has the advantages that
1, the place heavy-metal contaminated soil disposal of resources method, by clay ontology, aluminium oxide, strong acid, sandstone,
Silver powder, water and kiln are used cooperatively, and make the method when implementing, by the way that clay ontology is adequately mixed with water, general
Strong acid liquefies to aluminium oxide, to the aluminium oxide after liquefaction can be mixed easily with clay ontology, to make oxygen
Change aluminium to wrap up the heavy metal contaminants in clay, so as to avoid the leakage of heavy metal, and then be mixed into clay ontology
Sandstone is added, clay ontology is added in silver powder again, adsorbs silver powder counterweight metal residue, and then by clay ontology
It is fabricated to adobe, is fired so that adobe made of clay ontology is put into kiln, and then clay is made to be transformed into brick,
Due to silver powder to the absorption of heavy metal and aluminium oxide to the package of heavy metal, and then be mothballed heavy-metal residual object can always
In brick, and injury will not be generated to human body, so that this device be made to have the excellent of the reparation target utilized to waste resource recovery
Point solves the problems, such as to cause environmental degradation and agricultural product content of beary metal exceeded since soil resource pollutes.
2, the place heavy-metal contaminated soil disposal of resources method, passes through silica, quartz sand, sodium carbonate and nitre
Hydrochlorate double salt is used cooperatively, and makes the method when implementing, can be by answering silica, quartz sand, sodium carbonate and nitrate
Salt is mixed in proportion, to pass through fuel cartridge to the mixture of silica, quartz sand, sodium carbonate and nitrate double salt
It is heated with flame gun, so that silica, quartz sand, sodium carbonate and nitrate double salt is made to be transformed into glass flow, thus
Glass flow is uniformly applied on the brick that clay ontology burns out, the uniform glassivation fluid in the outer surface of brick is made,
And then cooled down by air-cooler to brick, cool and solidify glass flow, and then glassy layer is made to wrap clay brick,
To the effect completing the firing of clay brick, and then heavy metal soil is made to be reused, realize it is without secondary pollution, without dirt
The advantages of reparation target that dye transfer, waste resource recovery utilize, solves since soil resource pollution causes environmental degradation and agriculture
The exceeded problem of product content of beary metal.
3, the place heavy-metal contaminated soil disposal of resources method makes this by being used cooperatively for aluminium oxide and silver powder
Method since aluminium oxide is practically insoluble in water and non-polar organic solvent, and then makes brick made of clay ontology when implementing
When encountering rain and snow weather, sleet, which is dropped in brick surface, will not take away the heavy metal object contained in brick, and then avoid weight
The leakage of metal residue is wrapped up silver powder counterweight metal residue, is further avoided by the setting of silver powder
The leakage of heavy-metal residual object avoids the pollution of heavy metal to keep the implementation of the method more safe.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution: a kind of place heavy-metal contaminated soil disposal of resources method, including clay
Ontology, aluminium oxide, strong acid, sandstone, silver powder, water, fuel cartridge, flame gun, air-cooler, scraper, kiln, quartz sand, sodium carbonate,
Nitrate double salt, silica and pulverizer, the raw material in formula are respectively as follows: clay ontology 65%-70% by weight ratio,
Clay ontology is irradiated 15-24 hours using iron compound, the clay of aluminium compound rich content, by clay ontology through sunlight, from
And make moisture content in clay ontology lower than 1%, and then crush to clay, until to become diameter small for the form of clay
In 3 millimeters of powdered object, to complete the processing of clay ontology, aluminium oxide 2%-3.5%, aluminium oxide is that ammonium hydrogen carbonate is molten
Liquid and aluminum sulfate mix, and the ratio of ammonium bicarbonate soln and aluminum sulfate is respectively as follows: ammonium bicarbonate soln 50%, aluminum sulfate
50%, it by mixing ammonium bicarbonate soln and aluminum sulfate, and then is stirred, when stirring generates bubble, persistently stirs
Mix 3-5 minutes until bubble collapse after aluminium hydroxide complete, and then complete aluminium oxide production, the method implement when,
Since aluminium oxide is practically insoluble in water and non-polar organic solvent, and then brick made of clay ontology is made to encounter sleet sky
When gas, sleet, which is dropped in brick surface, will not take away the heavy metal object contained in brick, and then avoid heavy-metal residual object
Leakage, by the setting of silver powder, wraps up silver powder counterweight metal residue, further avoids heavy-metal residual object
Leakage avoid the pollution of heavy metal, strong acid 3%-3.5%, sandstone to keep the implementation of the method more safe
8%-10%, sandstone use diameter for the natural sand stone within 5 millimeters, and natural sand stone is taken to be impregnated in water in water, soak
Bubble when it is 5-10 hours a length of, to dispel natural sand stone, and then complete the production of sandstone, silver powder 0.01%-0.02%, silver
Powder uses purity for 99.99% silver bullion, carries out milling processing to silver bullion, until it is 0.01 milli that the form of silver bullion, which becomes diameter,
The silver powder of meter great little, so that silver powder completes the process, water 7%-12%, the method is when implementing, by by clay ontology and water
Adequately mixed, strong acid liquefy to aluminium oxide, thus by the aluminium oxide after liquefaction can easily with clay ontology
It is mixed, so that aluminium oxide be made to wrap up the heavy metal contaminants in clay, so as to avoid the leakage of heavy metal,
And then added into clay ontology into sandstone, clay ontology is added in silver powder again, inhales silver powder counterweight metal residue
It is attached, and then clay ontology is fabricated to adobe, it is fired so that adobe made of clay ontology is put into kiln, in turn
So that clay is transformed into brick, due to silver powder to the absorption of heavy metal and aluminium oxide to the package of heavy metal, and then keep heavy metal residual
It stays object that can be mothballed in brick always, and injury will not be generated to human body, so that this device be made to have to waste resource recovery
The advantages of reparation target utilized, solves since soil resource pollution causes environmental degradation and agricultural product content of beary metal super
Target problem, quartz sand 0.2%-0.5%, quartz sand are crushed using natural siliceous sand, natural siliceous sand are crushed to directly
Diameter is the granular substance within 1 millimeter, and then is cleaned to graininess quartz sand, is shelled by the mill between mechanical force and sand grains
Power come remove quartz sand surface film iron, bonding and mud impure mineral and further wipe it is broken not at the mineral combination of monomer
Body, then achieve the effect that further purifying quartz sand through graded operation, to complete the purification of quartz sand, and then complete quartz
The production of sand, sodium carbonate 0.2%-0.3%, sodium carbonate use salt, ammonium hydroxide and carbon dioxide for raw material, by ammonia and water and
Carbon dioxide reaction generates the ammonium hydrogen carbonate of a molecule, and ammonium hydrogen carbonate reacts the sodium bicarbonate precipitating generated and chlorine with sodium chloride
Change ammonium, it is sodium bicarbonate solid to be obtained by filtration, and then to carbon because its solubility is smaller why sodium bicarbonate, which precipitates,
Sour hydrogen sodium solid cools down, make the temperature of sodium bicarbonate solid be reduced to 30 ° hereinafter, in turn to sodium bicarbonate solid carry out
Smashing and grinding, the form of sodium bicarbonate solid becomes powder, so that the processing of sodium carbonate is completed, nitrate double salt 0.3%-
0.35%, silica 2%-4%, the silica is extracted using natural silica, so by Silica abrasive at
Diameter is the powdered of 0.1 mm in size, to complete the production of silica, the device in formula is distinguished by quantitative proportion
It is fuel cartridge one, flame gun one, air-cooler one, kiln one, scraper one, one, pulverizer, the method is being implemented
When, can by the way that silica, quartz sand, sodium carbonate and nitrate double salt are mixed in proportion, thus to silica,
The mixture of quartz sand, sodium carbonate and nitrate double salt is heated by fuel cartridge and flame gun, thus make silica,
Quartz sand, sodium carbonate and nitrate double salt are transformed into glass flow, so that glass flow to be uniformly applied to clay ontology burning
On the brick produced, makes the uniform glassivation fluid in the outer surface of brick, and then cool down to brick by air-cooler, make
Glass flow cooling and solidifying, and then glassy layer is made to wrap clay brick, to complete the firing of clay brick, and then make weight
The effect that metal soil is reused realizes the reparation target that without secondary pollution, pollution-free transfer, waste resource recovery utilize
The advantages of, it solves the problems, such as to cause environmental degradation and agricultural product content of beary metal exceeded since soil resource pollutes.
The electric elements occurred in this article are electrically connected with extraneous main controller and 220V alternating current, and main controller can be
Computer etc. plays the conventionally known equipment of control.
The method is when implementing, and by adequately being mixed clay ontology with water, strong acid is carried out liquid to aluminium oxide
Change, to the aluminium oxide after liquefaction can be mixed easily with clay ontology, to make aluminium oxide to the huge sum of money in clay
Belong to pollutant to be wrapped up, so as to avoid the leakage of heavy metal, and then add into clay ontology into sandstone, it again will be silver-colored
Clay ontology is added in powder, adsorbs silver powder counterweight metal residue, and then clay ontology is fabricated to adobe, thus will
Adobe made of clay ontology, which is put into kiln, to be fired, and then clay is made to be transformed into brick, since silver powder is to heavy metal
The package with aluminium oxide to heavy metal is adsorbed, and then be mothballed heavy-metal residual object can in brick always, and will not be right
Human body generates injury, so that this device be made to have the advantages of reparation target utilized to waste resource recovery, solves due to soil
Resource pollution causes environmental degradation and the exceeded problem of agricultural product content of beary metal.
The present invention is by the fired brick of heavy metals exceeding standard soil processing thus, radiation intensity examine the commission third-party institution into
Row detection, detection unit are Guangdong Province's building material product quality inspection center, and standard is using GB6566-2010 " construction material radiation
Property radionuclides limitation ", test result is qualification.From result it can be concluded that, with the heavy metals exceeding standard soil processing of clear water pool industrial area
Fired brick be embodiment, fired brick radioactive indicator meets the standard requirements of construction main body material.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.
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 (8)
1. a kind of place heavy-metal contaminated soil disposal of resources method, including clay ontology, aluminium oxide, strong acid, sandstone, silver
Powder, water, fuel cartridge, flame gun, air-cooler, scraper, kiln, quartz sand, sodium carbonate, nitrate double salt, silica and crushing
Machine, it is characterised in that: the raw material in formula is respectively as follows: clay ontology 65%-70%, aluminium oxide 2%-3.5% by weight ratio,
Strong acid 3%-3.5%, sandstone 8%-10%, silver powder 0.01%-0.02%, water 7%-12%, quartz sand 0.2%-0.5%, carbon
Sour sodium 0.2%-0.3%, nitrate double salt 0.3%-0.35%, silica 2%-4%；
Device in formula is respectively fuel cartridge one by quantitative proportion, flame gun one, air-cooler one, kiln one, is scraped
One, knife, one, pulverizer.
2. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Clay ontology is irradiated 15-24 hours using iron compound, the clay of aluminium compound rich content, by clay ontology through sunlight, from
And make the moisture content in clay ontology lower than 1%, and then crush to clay, until the form of clay becomes diameter and is less than
3 millimeters of powdered object, to complete the processing of clay ontology.
3. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Aluminium oxide is that ammonium bicarbonate soln and aluminum sulfate mix, and the ratio of ammonium bicarbonate soln and aluminum sulfate is respectively as follows: bicarbonate
Ammonium salt solution 50%, aluminum sulfate 50% by mixing ammonium bicarbonate soln and aluminum sulfate, and then are stirred, stirring
When generate bubble, persistently stir 3-5 minute until bubble collapse after aluminium hydroxide complete, and then completion aluminium oxide system
Make.
4. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Sandstone uses diameter for the natural sand stone within 5 millimeters, and natural sand stone is taken to be impregnated in water in water, immersion when it is a length of
5-10 hours, to dispel natural sand stone, and then complete the production of sandstone.
5. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Silver powder uses purity for 99.99% silver bullion, carries out milling processing to silver bullion, until it is 0.01 milli that the form of silver bullion, which becomes diameter,
The silver powder of meter great little, so that silver powder completes the process.
6. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Quartz sand is crushed using natural siliceous sand, and it is the granular substance within 1 millimeter that natural siliceous sand, which is crushed to diameter, in turn
Graininess quartz sand is cleaned, the film iron of quartz sand surface is removed by the mill stripping power between mechanical force and sand grains, is glued
Knot and mud impure mineral and further wipe it is broken not at the mineral aggregate of monomer, then through graded operation reach further purify stone
The effect of sand to complete the purification of quartz sand, and then completes the production of quartz sand.
7. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Silica is extracted using natural silica, and then is the powdered of 0.1 mm in size at diameter by Silica abrasive, from
And complete the production of silica.
8. a kind of place heavy-metal contaminated soil disposal of resources method according to claim 1, it is characterised in that: described
Sodium carbonate uses salt, ammonium hydroxide and carbon dioxide for raw material, and ammonia and water and carbon dioxide reaction are generated to the carbonic acid of a molecule
Hydrogen ammonium, ammonium hydrogen carbonate reacted with sodium chloride generate sodium bicarbonate precipitating and ammonium chloride, sodium bicarbonate why precipitate be because
Its solubility is smaller, sodium bicarbonate solid is obtained by filtration, and then cool down to sodium bicarbonate solid, consolidates sodium bicarbonate
The temperature of body is reduced to 30 ° hereinafter, smashing and grinding in turn to sodium bicarbonate solid, and the form of sodium bicarbonate solid becomes powder
Shape object, to complete the processing of sodium carbonate.
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| CN105948711A (en) * | 2016-04-25 | 2016-09-21 | 广西大学 | Fired brick and preparation method thereof |
| CN106560461A (en) * | 2016-05-17 | 2017-04-12 | 中科鼎实环境工程有限公司 | Repairing and resourceful treatment method of contaminated soil |
| CN107308906A (en) * | 2017-08-21 | 2017-11-03 | 苏州中晟环境修复股份有限公司 | A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal and preparation method thereof |
| CN107790478A (en) * | 2017-07-28 | 2018-03-13 | 安徽国祯环境修复股份有限公司 | A kind of method that pollution of chromium soil resource utilizes |
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- 2018-12-18 CN CN201811550392.3A patent/CN109734421A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092753A (en) * | 1994-03-25 | 1994-09-28 | 中国辐射防护研究院 | Glazed, vitrified brick of chrome slag and preparation method thereof |
| CN102657925A (en) * | 2012-04-12 | 2012-09-12 | 广东省生态环境与土壤研究所 | Clay-based heavy metal thermal curing agent and its method for curing heaving metal |
| CN105948711A (en) * | 2016-04-25 | 2016-09-21 | 广西大学 | Fired brick and preparation method thereof |
| CN106560461A (en) * | 2016-05-17 | 2017-04-12 | 中科鼎实环境工程有限公司 | Repairing and resourceful treatment method of contaminated soil |
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Application publication date: 20190510 |