CN108097715A - A kind of method using the leaching and repairing cadmium polluted soil of symbiosis - Google Patents
A kind of method using the leaching and repairing cadmium polluted soil of symbiosis Download PDFInfo
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- CN108097715A CN108097715A CN201711471283.8A CN201711471283A CN108097715A CN 108097715 A CN108097715 A CN 108097715A CN 201711471283 A CN201711471283 A CN 201711471283A CN 108097715 A CN108097715 A CN 108097715A
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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
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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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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Abstract
The invention belongs to the technical fields of soil remediation, provide a kind of method using the leaching and repairing cadmium polluted soil of symbiosis.Then this method stands the soil of high cadmium pollution and water, zinc salt co-grinding, grinding, obtained fine Soil slurry, press filtration on strainer, so that cadmium ion is separated with zinc salt, then add in lye and be filtered separation, zinc salt is reused with filtrate, achievees the purpose that soil removes cadmium.Compared with conventional method, the method for cadmium pollution soil repair of the present invention utilizes cadmium and the characteristic of zinc symbiosis; it efficiently can quickly remove the cadmium in cadmium pollution soil; non-secondary pollution, soil remediation is efficient, and repairing effect is notable; simultaneously on soil texture and soil fertility without influence; it is repeatable to utilize, and whole process is simple, and raw material is easy to get; expend relatively low, suitable large-scale promotion application.
Description
Technical field
The invention belongs to the technical fields of soil remediation, provide a kind of side using the leaching and repairing cadmium polluted soil of symbiosis
Method.
Background technology
With population rapid growth, industrial scale of agricultural production constantly expands, and the situation of heavy metal pollution of soil is increasingly
It is severe, it has also become the serious environmental problem that the whole world faces.Heavy metal pollution does not only result in soil physics, chemistry and biology
It learns property to change, reduces the yield and quality of crops, and can human body, direct harmful to human be reached by food chain
Health.Wherein, cadmium is due to having a very wide distribution and its bio-toxicity is high, and easily accumulated by crop etc., cause its pollution particularly
Seriously.Therefore, the various recovery techniques of Cadmium Pollution in Soils are administered in research, have important meaning to agricultural development and Food Security
Justice.
Cadmium is the most strong heavy metal element of bio-toxicity, and chemism in the environment is strong, and mobility is big, and toxicity is lasting,
Jeopardize human health easily by the enrichment of food chain, have three to cause human body（Pathogenic, carcinogenic, mutagenesis）Effect, energy
Induce the diseases such as renal failure change, arthritis, cancer, the cadmium in soil easily enters human body by crops approach to be caused to poison.Soil
The source of middle cadmium includes two aspect of mineral weathering and mankind's activity, and most important source is mankind's industrial and agricultural production activity,
It is the most serious in area, city suburbs, highway both sides and the irrigating region that heavy industry, chemical industry, textile industry rapidly develop.Cadmium pollution
The chemurgy that the approach of soil mainly has atmospheric sedimentation, industrial residue accumulation, Wastewater Irrigation in Farmland, municipal refuse and sludge is utilized and changed
Fertile pesticide and a large amount of of agricultural film use.
In recent years, engineering technology and biotechnology can be summarized as to the recovery technique of heavy metal cadmium contaminated land.Engineering skill
Art is to administer heavy-metal contaminated soil with physics or physicochemical principle；Biotechnology refers to some characteristics using biology
To adapt to, inhibit and improve the technical method of heavy-metal contaminated soil.Wherein biotechnology has significant effect, non-secondary pollution
The advantages that, but technology requirement is high, is not used widely, the recovery technique of the heavy metal cadmium earthwork at present is still with engineering skill
Based on art.Engineering technology mainly has the methods of soil replacement method, elution method, electrolysis and improved method：Soil replacement method can make topsoil
The concentration of middle heavy metal is down to below critical concentration, but the implementation of this method operates that quantities is big, and the time is long, is expended high；Electrolysis
Method is to be removed the heavy metal in soil in electrode under the action of electrolysis, electromigration, electric osmose and electrophoresis etc., but presence has
The shortcomings of current are slow, metal ion electromigration speed is small；Improved method is to add modifying agent to contaminated soil to reach reduction heavy metal
Biological effectiveness purpose restorative procedure, it is big there are technical difficulty, the defects of can not reusing.In contrast, elution method
It is a kind of more commonly used recovery technique, mainly elutes contaminated soil with leacheate, makes to be absorbed and fixed on soil particle
Heavy metal form one reagent complex of deliquescent ion or metal, then collect leacheate recycling and heavy metal and recycle
A kind of recovery technique method of leacheate, the key of this method is the selection of reagent, for cadmium pollution, usually used caustic lime,
Cadmium precipitation is formed to fix cadmium, but this method damages soil texture, while the repeated contamination of cadmium can not be avoided, it is therefore desirable to
A kind of efficiently elution reparation reagent of safety.
It has been taken both at home and abroad in terms of remediation of heavy metal-contaminated soil, especially elution method cadmium pollution soil repair at present
Obtained certain effect.Wherein Tan has invented a kind of method of remediating heavy metal Cd-polluted farmland soil towards section et al.（Chinese invention
Number of patent application 201510945995.3）, the invention is that the cadmium in contaminated soil is shifted removal by the way of chemical leaching,
In chemical leaching, used eluent is the mixed aqueous solution of iron chloride and ammonium chloride, wherein, chlorination iron speciation
For 0.8 ~ 2.0%, the mass concentration of ammonium chloride is 0.5 ~ 1.5%.In addition, Zhang Bolin et al. has invented a kind of cadmium pollution soil reparation
Method（Chinese invention patent application number 201710006387.5）, comprise the following steps：(1) dystopy removes：Plot will be polluted
Soil dig out, soil particle is processed by crusher；(2) elute：The dilute acetic acid solution of configuration 3%；By a certain percentage will
The acetum configured carries out cycling elution to the soil particle in step (1)；Soil particle is eluted with clear water again；
(3) nurse one's health：Slag powder is added in the soil after elution by a certain percentage, is mixed to get to the soil after reparation.
As it can be seen that heavy metal cadmium soil restoring technology of the prior art is larger there are quantities, implement complicated, improvement
Costly and easy the shortcomings of soil fertility is caused to weaken, and traditional method using caustic lime or other reagents elution cadmium,
Soil texture can be not only destroyed, and cadmium ion easily returns soil, and intractability is big, there are repairing effect difference and can not repeat profit
The defects of using.
The content of the invention
For such case, it is proposed that a kind of method using the leaching and repairing cadmium polluted soil of symbiosis, mainly by height
Cadmium pollution soil slurrying adds in zinc salt grinding；Then Free water is separated under gravity, forms not flow regime
Mud, by press filtration separation of solid and liquid, due to cadmium zinc symbiosis so that cadmium ion is isolated with zinc salt from soil solids；By filtrate alkali
Change, be settled out cadmium, zinc salt is reused with filtrate.This method makes cadmium and zinc symbiosis rapidly and efficiently using cadmium and the characteristic of zinc symbiosis
Soil is discharged by eluting, alkali process is overcome and is destroyed caused by soil and the pollution repeatedly of cadmium.
To achieve the above object, specific technical solution of the present invention is as follows：
A kind of method using the leaching and repairing cadmium polluted soil of symbiosis by the soil of high cadmium pollution and water, zinc salt co-grinding, is ground
Fine Soil slurry is made in mill, is then stood again on strainer, press filtration so that cadmium ion is separated with zinc salt, then adds in lye
Separation is filtered, zinc salt is reused with filtrate, achievees the purpose that soil except cadmium, rehabilitating soil is as follows：
（1）The soil of high cadmium pollution with water, zinc salt by certain parts by weight is mixed, adds in forced mixer, and is inserted into
Vibrating head makes the rubble in soil and sand grains thoroughly be crushed, and slurries are made, and then adds in ball mill and is ground, makes
Obtain fine Soil slurry；
（2）By step（1）Soil slurry obtained is transferred on strainer, stands, Free water is made to be separated under the effect of gravity
Out, the mud of not flow regime is obtained, further separation of solid and liquid is then carried out using filter press, due to cadmium zinc symbiosis so that
Cadmium ion follows zinc salt to be separated from soil solids, achievees the purpose that soil removes cadmium；
（3）To step（2）Lye is added in isolated filtrate, cadmium hydroxide precipitation is formed, is then filtered separation, not
The zinc salt of precipitation is reused with filtrate.
Preferably, step（1）The zinc salt is at least one of zinc chloride, zinc sulfate, zinc nitrate or zinc acetate.
Preferably, step（1）Each parts by weight of raw materials is in described, 56 ~ 68 parts by weight of soil of high cadmium pollution, water 30 ~ 40
Parts by weight, 2 ~ 4 parts by weight of zinc salt.
Preferably, step（1）The grain size of soil particle in the Soil slurry is 300 ~ 800 μm.
Preferably, step（1）The bunker lift speed of the forced mixer is 18 ~ 25m/min, promotes power of motor
For 5 ~ 10kW, agitator shaft speed is 25 ~ 40r/min, and stirring motor power is 25 ~ 40kW.
Preferably, step（1）The lapping mode of the ball mill is wet grinding, using steel ball as abrasive media, is driven shape
Formula is Edge-Transmission, and drum speed is 16 ~ 36r/min.
Preferably, step（2）The mesh size of the strainer is 50 ~ 200 μm.
Preferably, step（2）The time of the standing separation is 2 ~ 4h.
Preferably, step（2）The filter area of the filter press is 40 ~ 80m2, filter chamber number is 30 ~ 50, in filter chamber
Operating pressure is 0.5 ~ 1.6MPa.
Preferably, step（3）The lye is one in sodium hydroxide solution, potassium hydroxide solution, barium hydroxide solution
Kind.
The present invention is made cadmium rapidly and efficiently discharge soil by eluting with zinc symbiosis, is overcome using cadmium and the characteristic of zinc symbiosis
Alkali process is destroyed caused by soil and the pollution repeatedly of cadmium.This method provides one preferably for processing cadmium pollution soil
Technological approaches.Compared to directly elute, zinc association it is more efficient.
The present invention provides a kind of methods using the leaching and repairing cadmium polluted soil of symbiosis, compared with prior art, dash forward
The characteristics of going out and excellent effect are：
1. the method for cadmium pollution soil repair of the present invention using cadmium and the characteristic of zinc symbiosis, can be removed thoroughly in cadmium pollution soil
Cadmium, without polluting repeatedly, soil remediation significant effect.
2. the soil remediation method that the present invention uses, the implementation operating time is short, and remediation efficiency is high.
3. the present invention's is used as elution to repair reagent using zinc salt, on soil texture and soil fertility without influence, and can
With recycling.
4. the restorative procedure of the present invention, raw material are easy to get, process is simple to operation, and consuming is relatively low, can large-scale promotion application.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Scope be only limitted to following example.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
The soil of the high cadmium pollution of 62kg with the water of 35kg, the zinc chloride of 3kg is mixed, is added in forced mixer, this is strong
It is 20m/min that standard mixer hopper, which promotes speed, and promotion power of motor is 8kW, agitator shaft speed 32r/min, and stirring is electric
Acc power is 33kW, and is inserted into vibrating head, and the rubble in soil and sand grains is made thoroughly to be crushed, and slurries are made, then add in
Wet grinding is carried out in ball mill, fine Soil slurry is made in drum speed 26r/min；Then by soil mud obtained
Slurry is transferred on the strainer that mesh size is 130 μm, stands 3h, Free water is made to be separated under the effect of gravity, is obtained not
Then the mud of flow regime uses filter area as 60m2, filter chamber number is 40, operating pressure is 1.0MPa filter press into
The further separation of solid and liquid of row achievees the purpose that soil removes cadmium；Sodium hydroxide solution is added in into isolated filtrate, is formed
Cadmium hydroxide precipitates, and is then filtered separation, unprecipitated zinc salt repeats utilization with filtrate；
The method of 1 cadmium pollution soil repair of embodiment, test cadmium removal rate, soil remediation efficiency, obtained result such as 1 institute of table
Show.
Embodiment 2
The soil of the high cadmium pollution of 68kg with the water of 30kg, the zinc sulfate of 2kg is mixed, is added in forced mixer, this is strong
It is 18m/min that standard mixer hopper, which promotes speed, and promotion power of motor is 5kW, agitator shaft speed 25r/min, and stirring is electric
Acc power is 25kW, and is inserted into vibrating head, and the rubble in soil and sand grains is made thoroughly to be crushed, and slurries are made, then add in
Wet grinding is carried out in ball mill, fine Soil slurry is made in drum speed 16r/min；Then by soil mud obtained
Slurry is transferred on the strainer that mesh size is 50 μm, stands 4h, Free water is made to be separated under the effect of gravity, is not flowed
The mud of dynamic state, then uses filter area as 40m2, filter chamber number is 30, operating pressure is 0.5MPa filter press carries out
Further separation of solid and liquid achievees the purpose that soil removes cadmium；Potassium hydroxide solution is added in into isolated filtrate, forms hydrogen
Cadmium oxide precipitates, and is then filtered separation, unprecipitated zinc salt repeats utilization with filtrate；
The method of 2 cadmium pollution soil repair of embodiment, test cadmium removal rate, soil remediation efficiency, obtained result such as 1 institute of table
Show.
Embodiment 3
The soil of the high cadmium pollution of 56kg with the water of 40kg, the zinc nitrate of 4kg is mixed, is added in forced mixer, this is strong
It is 25m/min that standard mixer hopper, which promotes speed, and promotion power of motor is 10kW, agitator shaft speed 40r/min, and stirring is electric
Acc power is 40kW, and is inserted into vibrating head, and the rubble in soil and sand grains is made thoroughly to be crushed, and slurries are made, then add in
Wet grinding is carried out in ball mill, fine Soil slurry is made in drum speed 36r/min；Then by soil mud obtained
Slurry is transferred on the strainer that mesh size is 200 μm, stands 2h, Free water is made to be separated under the effect of gravity, is obtained not
Then the mud of flow regime uses filter area as 80m2, filter chamber number is 50, operating pressure is 1.6MPa filter press into
The further separation of solid and liquid of row achievees the purpose that soil removes cadmium；Barium hydroxide solution is added in into isolated filtrate, is formed
Cadmium hydroxide precipitates, and is then filtered separation, unprecipitated zinc salt repeats utilization with filtrate；
The method of 3 cadmium pollution soil repair of embodiment, test cadmium removal rate, soil remediation efficiency, obtained result such as 1 institute of table
Show.
Embodiment 4
The soil of the high cadmium pollution of 64kg with the water of 33kg, the zinc acetate of 3kg is mixed, is added in forced mixer, this is strong
It is 20m/min that standard mixer hopper, which promotes speed, and promotion power of motor is 8kW, agitator shaft speed 32r/min, and stirring is electric
Acc power is 28kW, and is inserted into vibrating head, and the rubble in soil and sand grains is made thoroughly to be crushed, and slurries are made, then add in
Wet grinding is carried out in ball mill, fine Soil slurry is made in drum speed 20r/min；Then by soil mud obtained
Slurry is transferred on the strainer that mesh size is 80 μm, stands 2h, Free water is made to be separated under the effect of gravity, is not flowed
The mud of dynamic state, then uses filter area as 50m2, filter chamber number is 40, operating pressure is 0.8MPa filter press carries out
Further separation of solid and liquid achievees the purpose that soil removes cadmium；Potassium hydroxide is added in into isolated filtrate, forms hydroxide
Cadmium precipitates, and is then filtered separation, unprecipitated zinc salt repeats utilization with filtrate；
The method of 4 cadmium pollution soil repair of embodiment, test cadmium removal rate, soil remediation efficiency, obtained result such as 1 institute of table
Show.
Embodiment 5
The soil of the high cadmium pollution of 58kg with the water of 38kg, the zinc chloride of 4kg is mixed, is added in forced mixer, this is strong
It is 22m/min that standard mixer hopper, which promotes speed, and promotion power of motor is 9kW, agitator shaft speed 35r/min, and stirring is electric
Acc power is 36kW, and is inserted into vibrating head, and the rubble in soil and sand grains is made thoroughly to be crushed, and slurries are made, then add in
Wet grinding is carried out in ball mill, fine Soil slurry is made in drum speed 34r/min；Then by soil mud obtained
Slurry is transferred on the strainer that mesh size is 150 μm, stands 4h, Free water is made to be separated under the effect of gravity, is obtained not
Then the mud of flow regime uses filter area as 70m2, filter chamber number is 50, operating pressure is 1.4MPa filter press into
The further separation of solid and liquid of row achievees the purpose that soil removes cadmium；Sodium hydroxide solution is added in into isolated filtrate, is formed
Cadmium hydroxide precipitates, and is then filtered separation, unprecipitated zinc salt repeats utilization with filtrate；
The method of 5 cadmium pollution soil repair of embodiment, test cadmium removal rate, soil remediation efficiency, obtained result such as 1 institute of table
Show.
Embodiment 6
The soil of the high cadmium pollution of 61kg with the water of 36kg, the zinc sulfate of 3kg is mixed, is added in forced mixer, this is strong
It is 20m/min that standard mixer hopper, which promotes speed, and promotion power of motor is 7kW, agitator shaft speed 35r/min, and stirring is electric
Acc power is 30kW, and is inserted into vibrating head, and the rubble in soil and sand grains is made thoroughly to be crushed, and slurries are made, then add in
Wet grinding is carried out in ball mill, fine Soil slurry is made in drum speed 25r/min；Then by soil mud obtained
Slurry is transferred on the strainer that mesh size is 100 μm, stands 3h, Free water is made to be separated under the effect of gravity, is obtained not
Then the mud of flow regime uses filter area as 60m2, filter chamber number is 40, operating pressure is 1.2MPa filter press into
The further separation of solid and liquid of row achievees the purpose that soil removes cadmium；Potassium hydroxide solution is added in into isolated filtrate, is formed
Cadmium hydroxide precipitates, and is then filtered separation, unprecipitated zinc salt repeats utilization with filtrate；
The method of 6 cadmium pollution soil repair of embodiment, test cadmium removal rate, soil remediation efficiency and soil remediation cost, obtains
The results are shown in Table 1.
Comparative example 1
During soil remediation, zinc salt is not added with, other preparation conditions are consistent with embodiment 6；
The method of 1 cadmium pollution soil repair of comparative example, test cadmium removal rate, soil remediation efficiency, obtained result such as 1 institute of table
Show.
Table 1：
Claims (10)
- A kind of 1. method using the leaching and repairing cadmium polluted soil of symbiosis, which is characterized in that by the soil of high cadmium pollution and water, zinc Salt co-grinding, grinding, are made fine Soil slurry, are then stood on strainer, press filtration so that cadmium ion is with zinc salt point From then addition lye is filtered separation, and zinc salt is reused with filtrate, achievees the purpose that soil removes cadmium, rehabilitating soil It is as follows：（1）The soil of high cadmium pollution with water, zinc salt by certain parts by weight is mixed, adds in forced mixer, and is inserted into Vibrating head makes the rubble in soil and sand grains thoroughly be crushed, and slurries are made, and then adds in ball mill and is ground, makes Obtain fine Soil slurry；（2）By step（1）Soil slurry obtained is transferred on strainer, stands, Free water is made to be separated under the effect of gravity Out, the mud of not flow regime is obtained, further separation of solid and liquid is then carried out using filter press, due to cadmium zinc symbiosis, in zinc So that cadmium ion follows zinc salt to be separated from soil solids under ion association, achieve the purpose that soil removes cadmium；（3）To step（2）Lye is added in isolated filtrate, cadmium hydroxide precipitation is formed, is then filtered separation, not The zinc salt of precipitation is reused with filtrate.
- 2. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （1）The zinc salt is at least one of zinc chloride, zinc sulfate, zinc nitrate or zinc acetate.
- 3. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （1）In each parts by weight of raw materials be 56 ~ 68 parts by weight of soil, 30 ~ 40 parts by weight of water, 2 ~ 4 parts by weight of zinc salt of high cadmium pollution.
- 4. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （1）The grain size of soil particle in the Soil slurry is 300 ~ 800 μm.
- 5. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （1）The bunker lift speed of the forced mixer be 18 ~ 25m/min, promotions power of motor be 5 ~ 10kW, agitator shaft speed For 25 ~ 40r/min, stirring motor power is 25 ~ 40kW.
- 6. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （1）The lapping mode of the ball mill is wet grinding, and using steel ball as abrasive media, driving form is Edge-Transmission, and cylinder turns Speed is 16 ~ 36r/min.
- 7. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （2）The mesh size of the strainer is 50 ~ 200 μm.
- 8. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （2）The time of the standing separation is 2 ~ 4h.
- 9. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （2）The filter area of the filter press is 40 ~ 80m2, filter chamber number is 30 ~ 50, in filter chamber operating pressure for 0.5 ~ 1.6MPa。
- 10. a kind of method using the leaching and repairing cadmium polluted soil of symbiosis according to claim 1, it is characterised in that：Step （3）The lye is sodium hydroxide solution, one kind in potassium hydroxide solution, barium hydroxide solution.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109834028A (en) * | 2019-04-10 | 2019-06-04 | 杨大伟 | A kind of emergency processing method and device of soil pollution |
| CN110420986A (en) * | 2019-07-29 | 2019-11-08 | 昆明理工大学 | A kind of in-situ construction method of tailing coating |
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| CN1156762A (en) * | 1996-02-06 | 1997-08-13 | 段旭川 | Process for directly producing cadmium sulfate from zinc cadmium slag |
| CN105274355A (en) * | 2015-11-18 | 2016-01-27 | 来宾华锡冶炼有限公司 | Method and device for removing copper and cadmium in zinc sulfate solution in replacement manner |
| CN105583222A (en) * | 2015-12-23 | 2016-05-18 | 江苏盖亚环境工程有限公司 | Repairing method for cadmium and zinc heavy metal contaminated soil |
| CN106277675A (en) * | 2016-08-31 | 2017-01-04 | 新奥生态环境治理有限公司 | The efficient minimizing technology of Cadmium Pollutants On The Chinese |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1156762A (en) * | 1996-02-06 | 1997-08-13 | 段旭川 | Process for directly producing cadmium sulfate from zinc cadmium slag |
| CN105274355A (en) * | 2015-11-18 | 2016-01-27 | 来宾华锡冶炼有限公司 | Method and device for removing copper and cadmium in zinc sulfate solution in replacement manner |
| CN105583222A (en) * | 2015-12-23 | 2016-05-18 | 江苏盖亚环境工程有限公司 | Repairing method for cadmium and zinc heavy metal contaminated soil |
| CN106277675A (en) * | 2016-08-31 | 2017-01-04 | 新奥生态环境治理有限公司 | The efficient minimizing technology of Cadmium Pollutants On The Chinese |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109834028A (en) * | 2019-04-10 | 2019-06-04 | 杨大伟 | A kind of emergency processing method and device of soil pollution |
| CN110420986A (en) * | 2019-07-29 | 2019-11-08 | 昆明理工大学 | A kind of in-situ construction method of tailing coating |
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