CN107185953B - Repairing device and method for extracting heavy metals in soil - Google Patents
Repairing device and method for extracting heavy metals in soil Download PDFInfo
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- CN107185953B CN107185953B CN201710471107.8A CN201710471107A CN107185953B CN 107185953 B CN107185953 B CN 107185953B CN 201710471107 A CN201710471107 A CN 201710471107A CN 107185953 B CN107185953 B CN 107185953B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a repairing device for extracting heavy metals in soil, which comprises a soil sample treatment system, wherein an outlet of the soil sample treatment system is connected with an ultrasonic enhanced extraction system, a mud outlet of the ultrasonic enhanced extraction system is connected with a mud-water separation system, a water outlet of the ultrasonic enhanced extraction system is connected with an extraction liquid treatment recycling system, reclaimed water of the mud-water separation system is connected to an inlet of the extraction liquid treatment recycling system, and reclaimed water of the extraction liquid treatment recycling system is connected to a water inlet of the ultrasonic enhanced extraction system. The method can efficiently extract heavy metals in the soil, conveniently recycle the extractant, reduce the restoration cost and reduce the secondary environmental pollution.
Description
Technical Field
The invention belongs to the field of soil heavy metal pollution remediation, and particularly relates to a remediation device and a remediation method for extracting heavy metals in soil.
Background
Soil is one of the most important natural resources that humans depend on to survive and develop. With the development of human society economy, soil pollution in China is increasingly serious due to atmospheric dry and wet sedimentation, sewage irrigation, pesticide hypertrophy and the like. According to the official report of the environmental protection department, about 1/5 of cultivated land in China is polluted by different degrees, wherein cadmium is one of main pollutants. Soil pollution seriously threatens national grain safety, and if the soil pollution is not reasonably controlled, the pollution is transmitted through a food chain to cause great influence on human health.
Although the traditional physical restoration means such as soil dressing, soil replacement or deep ploughing and soil turning are high in treatment speed and remarkable in effect, polluted soil is not treated, and heavy metals are deeply ploughed into the soil or transferred to other places. The method for jointly repairing the plants or microorganisms can be used for extracting the heavy metals, but has the advantages of long treatment period, large heavy metal residue and relatively high cost. Although the solidification/stabilization technology can be used for fixing heavy metals in soil and reducing the bioavailability and mobility of the heavy metals, the heavy metals are applicable to a narrow type of soil and are not applicable to farmlands or sites planted after restoration.
The ectopic soil leaching/extraction remediation technology is a physical-chemical separation technology, can effectively remove pollutants from soil, reduces potential risks of groundwater pollution, is high in remediation efficiency and low in treatment cost, is easy to realize system control and waste reduction, and becomes one of hot spot directions of the research of the polluted soil rapid remediation technology. However, the problems are that the traditional stirring extraction operation time is long, the extraction is incomplete, and some efficient extractants (such as chelating agents and surfactants) are not easy to recycle, and secondary pollution is easily caused to the environment when the extractants remain in the soil.
Disclosure of Invention
The invention aims to provide a repairing device and method for extracting heavy metals in soil, which are used for solving the problems in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a prosthetic devices of heavy metal in extraction soil, includes soil sample processing system, and soil sample processing system's exit linkage has ultrasonic wave to strengthen extraction system, and ultrasonic wave strengthens extraction system's play mud mouth and is connected with mud-water separation system, and ultrasonic wave strengthens extraction system's delivery port and is connected with extraction liquid treatment recycling system, and mud-water separation system's reclaimed water is connected to extraction liquid treatment recycling system's entrance, and extraction liquid treatment recycling system's reclaimed water is connected to ultrasonic wave and strengthens extraction system's water inlet.
Further, the soil sample treatment system comprises a soil sample crusher, wherein an outlet end of the soil sample crusher is connected with a rotary screen, and an outlet end of the rotary screen is connected to a feed inlet of the ultrasonic reinforced extraction system through a conveyor belt.
Further, the ultrasonic enhanced extraction system comprises a leaching tank, a feed inlet is arranged on one side of the leaching tank, the other side of the leaching tank is connected to the extraction liquid treatment and recycling system through a leaching tank water outlet, a leaching tank water distributor is arranged at the top of the leaching tank, a water inlet is arranged at the top of the leaching tank water distributor, a pulp stirrer with an ultrasonic probe is arranged at the lower part of the leaching tank water distributor, and the bottom of the leaching tank is connected to the mud-water separation system through a leaching tank mud outlet.
Further, mud-water separation system including setting up the hydrocyclone at the leaching tank mud hole downside, hydrocyclone's bottom is connected to the soil recovery pond after the restoration through hydrocyclone mud hole, hydrocyclone's one side is connected with the catch basin through hydrocyclone outlet, the exit end of catch basin is connected to the entrance of extract treatment recycling system.
Further, the extraction liquid treatment and recycling system comprises filtering equipment, wherein a filtering equipment water distributor is arranged at the top of the filtering equipment, the outlet ends of the leaching tank water outlet and the water collecting tank are both connected to the top inlet of the filtering equipment water distributor, the bottom of the filtering equipment is connected to an ion exchange resin tank through the filtering equipment water outlet, the top of the ion exchange resin tank is provided with the ion exchange resin tank water distributor, the filtering equipment water outlet is connected to the top inlet of the ion exchange resin tank water distributor, the bottom of the ion exchange resin tank is connected with an extraction liquid water collecting tank through the ion exchange resin tank water outlet, and the outlet ends of the extraction liquid water collecting tank are connected to the water inlet at the top of the leaching tank water distributor.
Further, the outlet ends of the water outlet and the water collecting tank of the leaching tank are connected to the top inlet of the water distributor of the filtering device through booster pumps.
Further, the outlet end of the extraction liquid water collecting tank is connected to a water inlet at the top of the water distributor of the leaching tank through a lifting pump, and a flowmeter is arranged between the lifting pump and the water inlet at the top of the water distributor of the leaching tank.
Further, a first filter screen, a second filter screen and a third filter screen are sequentially arranged in the filtering equipment from top to bottom; the ion exchange resin tank is internally provided with a first ion exchange resin unit, a second ion exchange resin unit and a third ion exchange resin unit from top to bottom in sequence.
Further, the side of the filter device is provided with a first visual door, and the side of the ion exchange resin tank is provided with a second visual door.
The method for extracting heavy metals in soil comprises the steps of preprocessing a polluted soil sample by the soil sample processing system, entering an ultrasonic reinforced extraction system for ultrasonic reinforced extraction, discharging an extraction liquid into an extraction liquid processing and recycling system after the heavy metals in the soil sample reach the standards, discharging the extracted soil sample into a mud-water separation system, discharging a separated water sample into the extraction liquid processing and recycling system, and discharging the extraction liquid recovered by the extraction liquid processing and recycling system into the ultrasonic reinforced extraction system for recycling.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, after the soil sample is treated by the soil sample treatment system, the soil sample is extracted by the ultrasonic reinforced extraction system, the solid part is separated by the mud-water separation system, and the liquid part is recovered by the extraction liquid treatment recycling system, so that the cadmium in the soil can be efficiently extracted and the extractant can be conveniently recovered. In the process for extracting heavy metals in soil, the ultrasonic reinforcement is combined with the traditional heavy metal leaching technology, and the ultrasonic action parameters are optimized, so that the internal oscillation of a sample is uniform, the required effect can be achieved in a short time, the using amount of eluent is reduced, the problems of long operation time, nonuniform oscillation and the like of a traditional oscillator are solved, and the extraction efficiency is improved. In addition, the method adopts the ion exchange resin to separate the heavy metals in the extract, so that the heavy metals in the extract can be efficiently recovered, and the extract can be recycled, thereby reducing the risk of secondary pollution caused by the traditional heavy metal contaminated soil extraction method and the cost of repairing the heavy metal contaminated soil.
Further, the upper end of the leaching tank is provided with a leaching tank water distributor, so that the effect of wide water distribution can be achieved.
Further, the slurry stirrer and the ultrasonic probe are integrated, so that the extraction liquid and the soil can be efficiently mixed and vibrated uniformly, and the extraction effect is improved.
Further, the water distributor of the ion exchange resin tank is arranged at the upper end of the ion exchange resin tank, so that the effect of wide water distribution can be achieved.
Further, by arranging the first ion exchange resin unit, the second ion exchange resin unit and the third ion exchange resin unit, the ion exchange resins in the first ion exchange resin unit, the second ion exchange resin unit and the third ion exchange resin unit can be replaced and regulated according to the types of the extractant and the heavy metals, and the separation of the heavy metals and the extraction liquid can be efficiently and quickly achieved.
Further, the right sides of the first ion exchange resin unit, the second ion exchange resin unit and the third ion exchange resin unit are provided with visual doors, the utilization degree of the ion exchange resin can be detected in the operation process, and if the utilization degree reaches the saturation degree, the ion exchange resin can be updated or washed and regenerated in time.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein, 1, soil sample treatment system, 2, ultrasonic intensified extraction system, 3, extract treatment recycling system, 4, mud-water separation system, 5, soil sample pulverizer, 6, drum screen, 7, conveyor belt, 8, leaching tank, 9, feed inlet, 10, leaching tank water distributor, 11, slurry stirrer with ultrasonic probe, 12, leaching tank mud discharge port, 13, leaching tank water discharge port, 14, filtration device water distributor, 15, first filter screen, 16, second filter screen, 17, third filter screen, 18, first visual door, 19, filtration device water discharge port, 20, booster pump, 21, ion exchange resin tank, 22, ion exchange resin tank water distributor, 23, second visual door, 24, first ion exchange resin unit, 25, second ion exchange resin unit, 26, third ion exchange resin unit, 27, ion exchange resin tank water discharge port, 28, extract tank, 29, lift pump, 30, flowmeter, 31, hydrocyclone separator, 32, hydrocyclone mud discharge port, 33, post-repair tank, 34, water collection tank, 35, water collection tank.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, a repairing device for extracting heavy metals in soil comprises a soil sample treatment system 1, wherein an outlet of the soil sample treatment system 1 is connected with an ultrasonic reinforced extraction system 2, a mud outlet of the ultrasonic reinforced extraction system 2 is connected with a mud-water separation system 4, a water outlet of the ultrasonic reinforced extraction system 2 is connected with an extraction liquid treatment recycling system 3, reclaimed water of the mud-water separation system 4 is connected to an inlet of the extraction liquid treatment recycling system 3, and reclaimed water of the extraction liquid treatment recycling system 3 is connected to a water inlet of the ultrasonic reinforced extraction system 2.
The soil sample processing system 1 comprises a soil sample crusher 5, an outlet end of the soil sample crusher 5 is connected with a rotary screen 6, a screen hole of the rotary screen 6 is set to be 2mm, soil can be fully contacted with an extraction liquid, an outlet end of the rotary screen 6 is connected to a feed inlet 9 of the ultrasonic reinforced extraction system 2 through a conveying belt 7, the conveying belt 7 is set to be a rotatable conveying belt, a plurality of material placing hoppers are arranged on the conveying belt 7, and the material conveying speed and the material conveying quantity can be controlled.
The ultrasonic enhanced extraction system 2 comprises a leaching tank 8, wherein the extracting solution in the leaching tank 8 can be selected from surfactant, chelating agent and the like with good effect, a feed port 9 is arranged on one side of the leaching tank 8, the other side of the leaching tank 8 is connected to the extracting solution treatment and recycling system 3 through a leaching tank water outlet 13, a leaching tank water distributor 10 is arranged at the top of the leaching tank 8, a water inlet is arranged at the top of the leaching tank water distributor 10, a slurry stirrer 11 with an ultrasonic probe is arranged at the lower part of the leaching tank water distributor 10, and the bottom of the leaching tank 8 is connected to the mud-water separation system 4 through a leaching tank mud outlet 12.
The mud-water separation system 4 comprises a hydrocyclone 31 arranged at the lower side of the mud discharging port 12 of the leaching tank, the bottom of the hydrocyclone 31 is connected to a restored soil recycling tank 33 through a mud discharging port 32 of the hydrocyclone, one side of the hydrocyclone 31 is connected with a water collecting tank 35 through a water discharging port 34 of the hydrocyclone, and the outlet end of the water collecting tank 35 is connected to the inlet of the extraction liquid treatment and recycling system 3.
The extraction liquid treatment and recycling system 3 comprises filtering equipment, wherein a first filter screen 15, a second filter screen 16 and a third filter screen 17 are sequentially arranged in the filtering equipment from top to bottom, the diameters of filter holes of the first filter screen 15, the second filter screen 16 and the third filter screen 17 are respectively 100 mu m, 50 mu m and 1 mu m, extraction liquid can be efficiently purified, blocking of the ion exchange resin is prevented and treated, a first visible door 18 is arranged on the filtering equipment, a filtering equipment water distributor 14 is arranged at the top of the filtering equipment, the outlet ends of a leaching tank water outlet 13 and a water collecting tank 35 are connected to the top inlet of the filtering equipment water distributor 14 through a booster pump 20, the bottom of the filtering equipment is connected to an ion exchange resin tank 21 through a filtering equipment water outlet 19, the ion exchange resin tank 21 is sequentially provided with a first ion exchange resin unit 24, a second ion exchange resin unit 25 and a third ion exchange resin unit 26 from top to bottom, the end parts of the first ion exchange resin unit 24, the second ion exchange resin unit 25 and the third ion exchange resin unit 26 are respectively provided with a second visible door 23, the top of the ion exchange resin tank 21 is provided with an ion exchange resin water distributor 22, the water distributor 22 is connected to the water inlet of the water collecting tank 10 through a water inlet of the filtering equipment water outlet 19, and the water collecting tank 29 is connected to the water inlet of the water collector 28 through a water inlet of the water collecting tank 10, and the water outlet of the water collector 28 is connected to the water inlet of the water collector 10 through a water outlet of the water collector 10.
The operation of the present invention is described in detail below:
the invention comprises a soil sample pretreatment system 1, an ultrasonic reinforced extraction system 2, a mud-water separation system 3 and an extraction liquid treatment and recycling system 4. The soil sample treatment system comprises a soil sample crusher 5, wherein the soil sample crusher 5 is connected with a rotary screen 6, and the rotary screen 6 is connected with a conveyor belt 7; the ultrasonic reinforced extraction system 2 comprises a feed port 9 connected to a leaching tank 8 through a conveyor belt 7, a leaching tank water distributor 10 is arranged at the upper part of the leaching tank 8, a pulp stirrer 11 with an ultrasonic probe is arranged at the lower end of the leaching tank water distributor 10, a leaching tank water outlet 13 is arranged at the right side of the leaching tank 8, and a leaching tank mud outlet 12 is arranged at the lower end of the leaching tank 8; the mud-water separation system 4 comprises a hydrocyclone 31 connected with the leaching tank mud discharging port 12 of the ultrasonic enhanced extraction system 3, the hydrocyclone mud discharging port 32 of the hydrocyclone 31 is connected with the restored soil recycling tank 33, and the hydrocyclone water discharging port 34 of the hydrocyclone 31 is connected with the water collecting tank 35; the extraction liquid treatment and recycling system 3 comprises a booster pump 20 connected to a filter device, the booster pump 20 is connected with a filter device water distributor 14 on the filter device, a first filter screen 15, a second filter screen 16 and a third filter screen 17 are sequentially arranged at the lower end of the filter device water distributor 14, a filter device water outlet 19 of the filter device is connected to an ion exchange resin tank 21, a first ion exchange resin unit 24, a second ion exchange resin unit 25 and a third ion exchange resin unit 26 are arranged in the ion exchange resin tank 21, and an ion exchange resin water filling and draining port 27 of the ion exchange resin tank 21 is connected with an extraction liquid collecting tank 28; the extract water collecting tank 28 is connected with a lifting pump 29, the lifting pump 29 is connected with a flowmeter 30, and the flowmeter 30 is connected with the leaching tank water distributor 10 on the leaching tank 8.
When the method is used, the physicochemical properties of quantitative heavy metal polluted soil samples are measured, and the subsequent extraction details are regulated according to the properties. The polluted soil sample is pretreated by a soil sample crusher 5 and a rotary screen 6 and then is sent to an ultrasonic reinforced extraction system 2 by a conveyor belt 7.
After entering the ultrasonic reinforced extraction system 2 through the feed inlet 9, the pretreated polluted soil extracts heavy metals from the extraction liquid (surfactant, chelating agent and the like) in the leaching tank 8. The extraction liquid with proper proportion is firstly distributed by a leaching tank water distributor 10, water and soil are uniformly mixed by a slurry stirrer 11 with an ultrasonic probe, and are subjected to ultrasonic reinforced extraction for proper time, the extraction liquid is discharged into an extraction liquid treatment and recycling system 3 from a water outlet 13 after the detection of the heavy metals by a soil sample reaches the standard, and the soil sample is discharged into a mud-water separation system 4 from a leaching tank mud outlet 12.
The soil sample enters the mud-water separation system 4 and is subjected to soil-water separation by the hydrocyclone 31, the separated water sample is discharged into the extraction liquid treatment recycling system 3 through a drainage outlet 34 of the hydrocyclone, and the separated soil sample is discharged into the restored soil recycling pool 33 through a mud discharge outlet 32 of the hydrocyclone.
The extraction liquid discharged from the water outlet 13 of the ultrasonic reinforced extraction system 2 sequentially passes through the first filter screen 15, the second filter screen 16 and the third filter screen 17 of the filtering equipment in the extraction liquid treatment recycling system 3, and the filtered water sample enters the ion exchange resin tank 21 through the water outlet 19 of the filtering equipment. The ion exchange resin tank 21 is provided therein with a first ion exchange resin unit 24, a second ion exchange resin unit 25 and a third ion exchange resin unit 26, and the type and amount of the ion exchange resins can be adjusted by the nature of the soil and the type of the extract. The side surfaces of the filtering equipment and the ion exchange resin tank are provided with visual doors, and the filter screen and the ion exchange resin can be replaced by observing and detecting actual conditions. The water sample is discharged into an extraction liquid water collecting tank 28 after passing through an ion exchange resin tank 21, and the extraction liquid parameters in the extraction liquid water collecting tank 28 are regulated and then recycled into the ultrasonic enhanced extraction system 2, wherein the lifting speed of a lifting pump 29 is controlled through a flowmeter 30.
Claims (6)
1. The repairing device for extracting heavy metals in soil is characterized by comprising a soil sample treatment system (1), wherein an outlet of the soil sample treatment system (1) is connected with an ultrasonic reinforced extraction system (2), a mud outlet of the ultrasonic reinforced extraction system (2) is connected with a mud-water separation system (4), a water outlet of the ultrasonic reinforced extraction system (2) is connected with an extraction liquid treatment recycling system (3), reclaimed water of the mud-water separation system (4) is connected to an inlet of the extraction liquid treatment recycling system (3), and reclaimed water of the extraction liquid treatment recycling system (3) is connected to a water inlet of the ultrasonic reinforced extraction system (2);
the soil sample treatment system (1) comprises a soil sample crusher (5), wherein the outlet end of the soil sample crusher (5) is connected with a rotary screen (6), and the outlet end of the rotary screen (6) is connected to a feed inlet (9) of the ultrasonic reinforced extraction system (2) through a conveyor belt (7);
the ultrasonic enhanced extraction system (2) comprises a leaching tank (8), a feed inlet (9) is formed in one side of the leaching tank (8), the other side of the leaching tank (8) is connected to an extraction liquid treatment recycling system (3) through a leaching tank water outlet (13), a leaching tank water distributor (10) is arranged at the top of the leaching tank (8), a water inlet is formed in the top of the leaching tank water distributor (10), a slurry stirrer (11) with an ultrasonic probe is arranged at the lower part of the leaching tank water distributor (10), and the bottom of the leaching tank (8) is connected to a mud-water separation system (4) through a leaching tank mud outlet (12);
the mud-water separation system (4) comprises a hydrocyclone (31) arranged at the lower side of a mud discharge opening (12) of the leaching tank, the bottom of the hydrocyclone (31) is connected to a restored soil recycling tank (33) through a mud discharge opening (32) of the hydrocyclone, one side of the hydrocyclone (31) is connected with a water collecting tank (35) through a water discharge opening (34) of the hydrocyclone, and the outlet end of the water collecting tank (35) is connected to the inlet of the extraction liquid treatment and recycling system (3);
the extraction liquid treatment recycling system (3) comprises filtering equipment, wherein the top of the filtering equipment is provided with a filtering equipment water distributor (14), the outlet ends of a leaching tank water outlet (13) and a water collecting tank (35) are connected to the top inlet of the filtering equipment water distributor (14), the bottom of the filtering equipment is connected to an ion exchange resin tank (21) through a filtering equipment water outlet (19), the top of the ion exchange resin tank (21) is provided with an ion exchange resin tank water distributor (22), the filtering equipment water outlet (19) is connected to the top inlet of the ion exchange resin tank water distributor (22), the bottom of the ion exchange resin tank (21) is connected with an extraction liquid water collecting tank (28) through an ion exchange resin tank water outlet (27), and the outlet end of the extraction liquid water collecting tank (28) is connected to the water inlet at the top of the leaching tank water distributor (10).
2. The repairing device for extracting heavy metals in soil according to claim 1, wherein the outlet ends of the leaching tank water outlet (13) and the water collecting tank (35) are connected to the top inlet of the water distributor (14) of the filtering equipment through booster pumps (20).
3. The repairing device for extracting heavy metals in soil according to claim 1, wherein the outlet end of the extraction liquid water collecting tank (28) is connected to a water inlet at the top of the leaching tank water distributor (10) through a lifting pump (29), and a flowmeter (30) is arranged between the lifting pump (29) and the water inlet at the top of the leaching tank water distributor (10).
4. The repairing device for extracting heavy metals in soil according to claim 1, wherein the filtering equipment is provided with a first filter screen (15), a second filter screen (16) and a third filter screen (17) in sequence from top to bottom; a first ion exchange resin unit (24), a second ion exchange resin unit (25) and a third ion exchange resin unit (26) are arranged in the ion exchange resin tank (21) in sequence from top to bottom.
5. A remediation device for extracting heavy metals from soil according to claim 1, characterised in that the side of the filtration device is provided with a first visual door (18) and the side of the ion exchange resin tank (21) is provided with a second visual door (23).
6. A method for extracting heavy metals in soil by adopting the repairing device for extracting heavy metals in soil according to any one of claims 1 to 5 is characterized in that polluted soil samples are pretreated by a soil sample treatment system (1), enter an ultrasonic enhanced extraction system (2) for ultrasonic enhanced extraction, extract liquor is discharged into an extract liquor treatment recycling system (3) after the heavy metals in the soil samples reach the standard, extracted soil samples are discharged into a mud-water separation system (4), separated water samples are also discharged into the extract liquor treatment recycling system (3), and extract liquor recovered by the extract liquor treatment recycling system (3) is discharged into the ultrasonic enhanced extraction system (2) for recycling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710471107.8A CN107185953B (en) | 2017-06-20 | 2017-06-20 | Repairing device and method for extracting heavy metals in soil |
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| CN201710471107.8A CN107185953B (en) | 2017-06-20 | 2017-06-20 | Repairing device and method for extracting heavy metals in soil |
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| CN107185953A CN107185953A (en) | 2017-09-22 |
| CN107185953B true CN107185953B (en) | 2023-05-26 |
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| CN109180541A (en) * | 2018-09-04 | 2019-01-11 | 陕西科技大学 | The method and recovery method of Cd in a kind of functional ionic liquids and preparation method thereof, intensified by ultrasonic wave washed off soil |
| CN112122322B (en) * | 2020-09-09 | 2022-04-19 | 季丹萍 | Contaminated soil fertility-increasing and repairing system and treatment process |
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| CN101879519A (en) * | 2010-01-18 | 2010-11-10 | 王鹤立 | Ultrasonic in situ extraction process for remediating heavy metal-polluted soil |
| CN205393174U (en) * | 2016-03-03 | 2016-07-27 | 河北煜环环保科技有限公司 | Heavy metal contaminated soil dystopy repair system |
| WO2017071104A1 (en) * | 2015-10-27 | 2017-05-04 | 华东理工大学 | Combined soil washing desorption method and device |
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- 2017-06-20 CN CN201710471107.8A patent/CN107185953B/en active Active
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|---|---|---|---|---|
| CN101879519A (en) * | 2010-01-18 | 2010-11-10 | 王鹤立 | Ultrasonic in situ extraction process for remediating heavy metal-polluted soil |
| WO2017071104A1 (en) * | 2015-10-27 | 2017-05-04 | 华东理工大学 | Combined soil washing desorption method and device |
| CN205393174U (en) * | 2016-03-03 | 2016-07-27 | 河北煜环环保科技有限公司 | Heavy metal contaminated soil dystopy repair system |
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