CN106345797A - Chemical eluant for repairing cadmium polluted soil and use method of chemical eluant - Google Patents
Chemical eluant for repairing cadmium polluted soil and use method of chemical eluant Download PDFInfo
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- CN106345797A CN106345797A CN201611093561.6A CN201611093561A CN106345797A CN 106345797 A CN106345797 A CN 106345797A CN 201611093561 A CN201611093561 A CN 201611093561A CN 106345797 A CN106345797 A CN 106345797A
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- soil
- chemical leaching
- cadmium pollution
- drip washing
- cadmium
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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
-
- 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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- 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
Abstract
The invention relates to a chemical eluant for repairing cadmium polluted soil. The chemical eluant is prepared from citric acid with the concentration of 0.1mol/L to 0.5mol/L, ammonium citrate with the concentration of 0.05mol/L to 0.1mol/L and sodium thiosulfate with the concentration of 0.1mol/L to 0.2mol/L, wherein the volume ratio of the citric acid to the ammonium citrate to the sodium thiosulfate in the chemical eluant is (2 to 4): (1 to 2): (1 to 2). According to the chemical eluant, the cadmium removal rate is high, the influence on soil properties is low, and the cost is low. The invention further provides a use method of the chemical eluant for repairing the cadmium polluted soil.
Description
Technical field:
The present invention relates to remediation of heavy metal-contaminated soil field, particularly to be a kind of for cadmium pollution soil repair
Chemical leaching and using method.
Background technology:
Heavy metal pollution is one of serious problem of environmental pollution that current whole world various countries suffer from.2005 to 2013
Year, China has carried out national Soil Pollution Investigation first.The total point position exceeding standard rate of national soil is 16.1%, wherein ploughs
Soil point position exceeding standard rate is 19.4%.Reached 20,000,000 hectares by the cultivated area of heavy metal pollution, account for the six of national total cultivated area
/ mono-.Heavy metal pollution of soil can make soil fertility and the yield and quality of crop reduce, and jeopardizes eventually through food chain
The life and health of the mankind.In recent years, heavy metal pollution event takes place frequently, the Guangdong Bei Jiang cadmium pollution of 2005, in August, 2009 lake
The cadmium pollution that southern Liuyang occurs, in September, 2009 send out the lead dirt of the raw lead contamination in Hunan Wugang, the generation of in March, 2010 Hunan Jiahe
Dye etc. event, allow the public that farmland pollution is created with new worry, also result in simultaneously society for agricultural product particularly Oryza sativa L.,
The cereal crops safety such as Semen Tritici aestivi and the concern of farmland pollution problem.
Cadmium, chromium, lead, hydrargyrum, arsenic five heavy metal species are referred to as " five poisonous creatures: scorpion, viper, centipede, house lizard, toad " in soil because its toxicity is big.Cadmium is not that human body must
The element needing, cadmium is mainly entered human body and body is damaged by food, water and air.Enter the cadmium of human body, shape in vivo
Become cadmium sulfoprotein, whole body is reached by blood, and selectively accumulates in Liver and kidney.Although the cadmium in human body can pass through excrement
Just, urine etc. is discharged, but speed is very slow.The biological half life of cadmium is up to 10～30 years, therefore it can be accumulated in body for a long time
Human body is worked the mischief.Because cadmium is larger to the harm of human body, cd is classified as the 6th danger by poisonous substance administration committee of the U.S. (atsdr)
The noxious substance of evil health, united nations environment regional planning agency (dnfp) and international work hygiene heavy metal committee also arrange cd
Enter the environmental contaminants of primary study, World Health Organization's then food contaminant as priority research.Heavy metal pollution
Problem is the significant problem being related to the people's livelihood, and concern, solution heavy metal pollution problem are extremely urgent conscientiously.
The restorative procedure of heavy-metal contaminated soil mainly has physical method, chemical method and biological renovation method etc., but by
High in the difficulty extracting heavy metal from soil, required time is long, and some methods are because treatment cost is high, benefit is low, easily make
Become secondary pollution, difficulty of construction is big etc. can not expanded to be applied.Soil leaching technology, is using water or other eluents, passes through
The effects such as chelating, precipitation, separate contaminated soil component or the pollutant in soil are transferred to liquid phase, then to the pouring containing pollutant
The technology that washing liquid is processed.Heavy metal can thoroughly be removed from soil by Soil leaching recovery technique, and the time used is relatively
Short, therefore this technology is increasingly taken seriously, and also therefore have developed substantial amounts of Soil leaching agent.
The key of Soil leaching technology is the selection of eluent, and eluent should meet following condition: one is to soil physical chemistry
Property destructiveness is not strong；Two are price economies and have practicality；Three is strong to the solvability of the heavy metal in soil；Four are
The coalition of eluent and heavy metal is easily isolated and can back and forth utilize, and does not cause secondary pollution to environment.At present, both at home and abroad
The Soil leaching agent of research generally can be divided three classes: inorganic, organic acid eluent, artificial chelating agent and Bio-surface active
Agent.Citric acid is a kind of natural organic acidss, can form, with most of heavy metal, the animal migration that soluble chelating thing strengthens heavy metal.
With respect to mineral acids such as hydrochloric acid, nitric acid, citric acid is in the lessivation to soil to soil physico-chemical property and biological structure shadow
Sound is relatively small, and its low price, is easily degraded in soil, does not result in secondary pollution, is before one kind very has application
The eluent of scape.Ammonium citrate is a kind of soluble-salt, and Liu Jiali is by carrying out drip washing to regions of sewage irrigation in Tianjin alkalescence salty soils
Cd fractionation analysis experiment in soil after desalination and desalination, result shows that ammonium citrate has stronger activation to the cadmium in soil
Effect, illustrates that ammonium citrate is carrying out to cadmium pollution soil to play certain effect when drip washing is repaired.Chen Chunle etc. have studied
Hydrochloric acid and 3 kinds of neutral salt are combined the elution efficiency to Cadmium in Soil for the drip washing, and result shows that compound eluent is all high to the clearance of cadmium
In single eluent.For complicated soil system, single eluent is limited all the time to the removal effect of the heavy metal in soil.
Content of the invention:
The purpose of the present invention is for heavy metal cadmium soil, provide a kind of high on cadmium clearance, soil property is affected little,
The chemical leaching for cadmium pollution soil repair of low cost.
Another object of the present invention is to provide for a kind of using method of the chemical leaching of cadmium pollution soil repair.
The object of the present invention is achieved like this:
The chemical leaching of cadmium pollution soil repair of the present invention, the Fructus Citri Limoniae that chemical leaching is 0.1～0.5 mol/l by concentration
The sodium thiosulfate composition that acid, concentration are the ammonium citrate of 0.05～0.1 mol/l, concentration is 0.1～0.2 mol/l, chemistry
Citric acid in eluent, ammonium citrate and sodium thiosulfate volume ratio be 2～4: 1～2: 1～2, volume unit be ml,
Mass unit is g.
The using method of the above-mentioned chemical leaching for cadmium pollution soil repair, using citric acid, ammonium citrate and
Sodium thiosulfate prepares the chemical leaching drip washing cadmium pollution soil that obtains at least 2 times, then with distillation water wash 1～3 time, removal
The cadmium of residual and chemical leaching in soil, the mixture centrifugation of chemical leaching and soil obtains the soil repaired.
Chemical leaching volume of the present invention is 3～5: 1 with the mass ratio first time drip washing of cadmium pollution soil, drenches for second
Wash as 1～3: 1, described distilled water volume is 2～10: 1 with the mass ratio of cadmium pollution soil, and volume unit is ml, quality
Unit is g.
3～5 h for the first time of above-mentioned chemical leaching drip washing time, second 1～2 h, the distillation water wash time is 0.5
～1h.
The using method of the above-mentioned chemical leaching for cadmium pollution soil repair, specifically includes following step:
(1) by air-dried for cadmium pollution soil, levigate mistake 20 mesh sieve；
(2) first time drip washing cadmium pollution soil: be 3～5: 1 configurationization by chemical leaching volume and cadmium pollution soil mass ratio
Learn eluent, chemical leaching is added in cadmium pollution soil to be repaired, be under 180～250 r/min room temperature conditions in rotating speed
Vibration drip washing 3～5 h, is then centrifuged 5～10min under 3600～4000 r/min, supernatant liquid is poured out；
(3) second drip washing cadmium pollution soil: be 1～3: 1 preparation by chemical leaching volume and cadmium pollution soil mass ratio
Learn eluent, chemical leaching is added in the soil through first time drip washing, room under the conditions of rotating speed is 180～250 r/min
Temperature vibration drip washing 1～2 h, is then centrifuged 5～10 min under 3600～4000 r/min, supernatant liquid is poured out；
(4) in distilled water volume and cadmium pollution soil mass ratio, the ratio for 2～10: 1 adds in the soil through second drip washing
Enter distilled water, vibration drip washing 1～3 time under room temperature, hunting speed is 180～250 r/min, and the time is 0.5～1h, Ran Hou
It is centrifuged 5～10min under 3600～4000 r/min, supernatant liquid is poured out, obtains rehabilitating soil.
The present invention prepares the chemical leaching drip washing cadmium pollution soil obtaining using citric acid, ammonium citrate and sodium thiosulfate
Earth at least 2 times, then remove the cadmium of residual and eluent in soil for 1～3 time with distillation water wash, by the mixing of leacheate and soil
Thing centrifugation, obtains rehabilitating soil.
The present invention adopts citric acid, ammonium citrate and sodium thiosulfate as eluent, carries out during soil remediation to cadmium
Clearance is higher, leacheate applied widely, particularly centering heavy Cd contamination soil has preferable effect.Fructus Citri Limoniae used
Acid, ammonium citrate, sodium thiosulfate are cheap, the removal effect under low concentration, cadmium having been had, and the reparation reducing soil becomes
This.Chemical leaching using method of the present invention is simple.
Specific embodiment:
Embodiment 1:
Pick up from ShenFang,SiChuan chemical plant periphery farmland for examination soil, soil types is purple tide sand mud field soil, fundamental property is shown in Table
1.
Will, levigate mistake 20 mesh sieve air-dried for examination soil.Take several polypropylene vial, every bottle weighs soil sample 5 g, every bottle of addition
The citric acid of 0.1 mol/l is by concentration, chemistry pouring that ammonium citrate, sodium thiosulfate are prepared by 3: 1: 1 volume ratios
Lotion 15 ml, is put in agitator and vibrates 3 h under 180 r/min, room temperature condition, is subsequently placed on centrifuge, 4000
It is centrifuged 10 min under r/min rotating speed, supernatant liquid is poured out.Add the above-mentioned chemical leaching of 10 ml again in bottle, be put in vibration
Vibrate 2 h under 180 r/min, room temperature condition in device.It is subsequently placed on centrifuge, be centrifuged 10 under 4000 r/min rotating speeds
Min, supernatant liquid is poured out；Last add in bottle 10 ml distilled water in the agitator 180 r/min, shake under room temperature condition
Swing 0.5 h, be subsequently placed on centrifuge, be centrifuged 10 min under 4000 r/min rotating speeds, supernatant liquid is poured out.Similarity condition
Under again with distillation water wash twice, obtain rehabilitating soil.
Comparative example 1:
Weigh supplying in several pieces embodiment 1 respectively and try soil 5 g in several polypropylene vial, every bottle of addition is by concentration
The citric acid of 0.1 mol/l and sodium thiosulfate press chemical leaching 15 ml that 3: 1 volume ratios are prepared, and are put in agitator
Vibrate 3 h under 180 r/min, room temperature condition, be subsequently placed on centrifuge, under 4000 r/min rotating speeds, be centrifuged 10 min,
Supernatant liquid is poured out.Add the above-mentioned chemical leaching of 10 ml again in bottle, be put in agitator in 180 r/min, room temperature bar
2 h are vibrated under part.It is subsequently placed on centrifuge, be centrifuged 10 min under 4000 r/min rotating speeds, supernatant liquid is poured out.Finally
Bottle adds 10 ml distilled water in the agitator 180 r/min, vibrate 0.5 h under room temperature condition, be subsequently placed in centrifuge
On, it is centrifuged 10 min under 4000 r/min rotating speeds, supernatant liquid is poured out.Under similarity condition again with distillation water wash twice,
Obtain rehabilitating soil.
Embodiment 2:
Weigh supplying in several pieces embodiment 1 respectively and try soil 5 g in several polypropylene vial, every bottle of addition is by concentration
The citric acid of 0.1 mol/l, ammonium citrate, sodium thiosulfate press change eluent 15 ml that 2: 1: 2 volume ratios are prepared, and put
Vibrate 3 h under 200r/min, room temperature condition in agitator；Be subsequently placed on centrifuge, under 4000 r/min rotating speeds from
The heart 5 min, supernatant liquid is poured out.Add the above-mentioned chemical leaching of 10 ml again in bottle, be put in agitator in 200r/
Vibrate 2 h under min, room temperature condition, be subsequently placed on centrifuge, be centrifuged 5 min under 4000 r/min rotating speeds, by supernatant liquid
Pour out.Last add in bottle 10 ml distilled water in the agitator 200 r/min, vibrate 0.5 h under room temperature condition, then put
On centrifuge, it is centrifuged 5min under 4000 r/min rotating speeds, supernatant liquid is poured out.Again with distillation water wash under similarity condition
Twice, obtain rehabilitating soil.
Embodiment 3:
Weigh supplying in several pieces embodiment 1 respectively and try soil 5 g in several polypropylene vial, every bottle of addition is by concentration
The citric acid of 0.1 mol/l, ammonium citrate, sodium thiosulfate press change this eluent 15 ml that 4: 1: 2 volume ratios are prepared,
It is put in agitator and vibrates 3 h under 200 r/min, room temperature condition, be subsequently placed on centrifuge, under 4000 r/min rotating speeds
It is centrifuged 10 min, supernatant liquid is poured out.Add the above-mentioned chemical leaching of 10 ml again in bottle, be put in agitator in 200
Vibrate 1 h under r/min, room temperature condition, be subsequently placed on centrifuge, be centrifuged 5 min under 4000 r/min rotating speeds, by upper strata
Liquid is poured out.Last add in bottle 10 ml distilled water in the agitator 200r/min, vibrate 0.5 h, then under room temperature condition
It is placed on centrifuge, be centrifuged 10 min under 4000 r/min rotating speeds, supernatant liquid is poured out.Distilled water is used again under similarity condition
Drip washing twice, obtains rehabilitating soil.
Different disposal is to soil property after the clearance supplying examination Cadmium in Soil and drip washing to such as table 1.
As can be seen from Table 1: after repairing by embodiment 1 methods described, Cadmium in Soil content is down to 4.22 by 50.3 mg/kg
Mg/kg, cadmium clearance is 91.6%；Effective cadmium content of soil is 1.55 mg/kg, more non-rehabilitating soil 35.95 mg/kg fall
Low by 95.7%, soil ph is reduced to 5.37, but in addition to the more non-rehabilitating soil of quick-acting potassium content reduces, other indexs have all risen.Right
After repairing in ratio 1, Cadmium in Soil content is down to 3.93 mg/kg by 50.3 mg/kg, and cadmium clearance is 92.2%；Soil is effective
State cadmium content is 1.38 mg/kg, and more untreated soil 35.95 mg/kg reduces by 96.2%, but soil ph is reduced to 4.61, change
Larger, the more non-rehabilitating soil of available potassium decreases, and available phosphoruss increased.Can be seen that the addition of ammonium citrate from contrast
Serve cushioning effect, the impact to physicochemical property for the eluent can be reduced.
As can be seen from Table 1: after repairing by embodiment 2 methods described, Cadmium in Soil content is down to 6.87 by 50.3 mg/kg
Mg/kg, cadmium clearance is 86.3%；Effective cadmium content of soil is 3.37 mg/kg, more non-rehabilitating soil 35.95 mg/kg fall
Low by 90.6%, soil ph is reduced to 5.84, and in addition to the more non-rehabilitating soil of quick-acting potassium content reduces, other indexs have all risen.By real
After applying the reparation of example 3 methods described, Cadmium in Soil content is down to 5.55 mg/kg by 50.3 mg/kg, and cadmium clearance is 89.0%；Soil
Earth available Cd content is 2.64 mg/kg, and more non-rehabilitating soil 35.95 mg/kg reduces by 92.7%, and soil ph is reduced to 4.90, but
In addition to the more non-rehabilitating soil of quick-acting potassium content reduces, other indexs have all risen.
Embodiment 4:
Pick up from ShenFang,SiChuan one polluted agricultural land for examination soil, soil types is greyish brown tide big mud field soil, fundamental property is shown in Table 2.
Will, levigate mistake 20 mesh sieve air-dried for examination soil.Take several polypropylene vial, every bottle weighs soil sample 5 g, every bottle of addition
The citric acid of 0.1 mol/l is by concentration, chemistry pouring that ammonium citrate, sodium thiosulfate are prepared by 3: 1: 1 volume ratios
Lotion 15 ml, is put in agitator and vibrates 3 h under 250 r/min, room temperature condition, is subsequently placed on centrifuge, 2600
It is centrifuged 10 min under r/min rotating speed, supernatant liquid is poured out.Add the above-mentioned chemical leaching of 5 ml again in bottle, be put in vibration
Vibrate 1 h under 250 r/min, room temperature condition in device.It is subsequently placed on centrifuge, be centrifuged 10 under 3600 r/min rotating speeds
Min, supernatant liquid is poured out.Last add in bottle 10 ml distilled water in the agitator 250 r/min, shake under room temperature condition
Swing 0.5 h, be subsequently placed on centrifuge, be centrifuged 10 min under 3600 r/min rotating speeds, supernatant liquid is poured out.Similarity condition
Under again with distillation water wash twice, obtain rehabilitating soil.Concrete outcome is shown in Table 2.
As can be seen from Table 2: after repaired, Cadmium in Soil content is down to 0.45 mg/kg by 1.19 original mg/kg,
Clearance is 62.2%.Soil available cadmium is down to 0.07 mg/kg by 0.67 mg/kg, and bio-available Zn concentration reduces by 89.5%.Repair
Soil can reach " standard of soil environment quality " (gb15618-2008) secondary standard (0.45 mg/kg) and requires afterwards.Soil after reparation
Earth ph is reduced to 5.17, but in addition to the more non-rehabilitating soil of quick-acting potassium content reduces, other indexs have all risen.
Embodiment 5:
Pick up from ShenFang,SiChuan chemical plant periphery farmland for examination soil, soil types is purple tide sand soil, fundamental property is shown in Table 3.
Will, levigate mistake 20 mesh sieve air-dried for examination soil.Take several plastic bottles, every bottle weighs soil sample 5 g, every bottle add by
The chemical leaching that concentration is the citric acid of 0.1 mol/l, ammonium citrate, sodium thiosulfate are prepared by 3: 1: 1 volume ratios
Agent 15 ml, is put in agitator and vibrates 3 h under 250 r/min, room temperature condition, is subsequently placed on centrifuge, in 3800 r/
It is centrifuged 10 min under min rotating speed, supernatant liquid is poured out.Add the above-mentioned chemical leaching of 15 ml again in bottle, be put in agitator
In vibrate 1 h under 250 r/min, room temperature condition, be subsequently placed on centrifuge, under 3800 r/min rotating speeds be centrifuged 10
Min, supernatant liquid is poured out.Last add in bottle 10 ml distilled water in the agitator 2500r/min, shake under room temperature condition
Swing 0.5 h, be subsequently placed on centrifuge, be centrifuged 10 min under 3800 r/min rotating speeds, supernatant liquid is poured out.Similarity condition
Under again with distillation water wash twice, obtain rehabilitating soil.Concrete outcome is shown in Table 3.
After repaired, the content of Cadmium in Soil is down to 3.41 mg/kg by 15.0 original mg/kg, and clearance is
77.3%.Soil available cadmium is down to 0.77 mg/kg by 9.87 mg/kg, and bio-available Zn concentration reduces by 92.2%.Soil ph after reparation
For 5.39, the more non-rehabilitating soil of quick-acting potassium content reduces, and alkali-hydrolyzable nitrogen, available phosphorus content increase more, and the change of other indexs is less.
From embodiment described above as can be seen that citric acid, ammonium citrate and sodium thiosulfate are used as eluent pair
The reparation of middle heavy Cd contamination soil, can make the total cadmium in soil and available Cd content substantially reduce, particularly with severe cadmium
Contaminated soil clearance is higher.
After drip washing, soil is mainly ph and reduces, and reaches, to after repairing, the soil that standard of soil environment quality is suitable for Planting Crops
Earth is using addition cao process.1%(w/w is pressed to soil after repairing) add cao, and the mixing that adds water balances two weeks, in plantation
When add fertilizer.
Above-described embodiment is that the above to the present invention is described further, but this should not being interpreted as, the present invention is above-mentioned
The scope of theme is only limitted to above-described embodiment.All protection scope of the present invention is belonged to based on the technology that the above is realized.
Claims (5)
1. it is used for the chemical leaching of cadmium pollution soil repair it is characterised in that chemical leaching is 0.1～0.5 by concentration
The thiosulfuric acid that the citric acid of mol/l, concentration are the ammonium citrate of 0.05～0.1 mol/l, concentration is 0.1～0.2 mol/l
Sodium forms, and citric acid in chemical leaching, ammonium citrate and sodium thiosulfate volume ratio are 2～4: 1～2: 1～2, body
Long-pending unit is ml, mass unit is g.
2. it is used for the using method of the chemical leaching of cadmium pollution soil repair it is characterised in that adopting citric acid, ammonium citrate
Prepare the chemical leaching drip washing cadmium pollution soil that obtains at least 2 times with sodium thiosulfate, then with distilling water wash 1～3 time, go
Except the cadmium of residual and chemical leaching in soil, the mixture centrifugation of chemical leaching and soil obtains the soil repaired
Earth.
3. the chemical leaching for cadmium pollution soil repair according to claim 2 using method it is characterised in that
Described chemical leaching volume is 3～5: 1 with the mass ratio first time drip washing of cadmium pollution soil, and second drip washing is 1～3:
1, described distilled water volume is 2～10: 1 with the mass ratio of cadmium pollution soil, and volume unit is ml, mass unit is g.
4. according to the method in claim 2 or 3 it is characterised in that the described chemical leaching drip washing time for the first time 3～5
H, second 1～2 h, the distillation water wash time is 0.5～1 h.
5. the using method of the chemical leaching for cadmium pollution soil repair according to Claims 2 or 3, specifically includes
Following step:
(1) by air-dried for cadmium pollution soil, levigate mistake 20 mesh sieve；
(2) first time drip washing cadmium pollution soil: be 3～5: 1 preparation by chemical leaching volume and cadmium pollution soil mass ratio
Learn eluent, chemistry is washed eluent and adds in cadmium pollution soil to be repaired, be 180～250 r/min, room temperature condition in rotating speed
Lower vibration drip washing 3～5 h, is then centrifuged 5～10 min under 3600～4000 r/min, supernatant liquid is poured out；
(3) second drip washing cadmium pollution soil: be 1～3: 1 preparation by chemical leaching volume and cadmium pollution soil mass ratio
Learn eluent, chemical leaching is added in the soil through first time drip washing, be 180～250 r/min, room temperature condition in rotating speed
Lower vibration drip washing 1～2 h, is then centrifuged 5～10 min under 3600～4000 r/min, supernatant liquid is poured out；
(4) in distilled water volume and cadmium pollution soil mass ratio, the ratio for 2～10: 1 adds in the soil through second drip washing
Enter distilled water, vibration drip washing 1～3 time under room temperature, hunting speed is 180～250 r/min, and the time is 0.5～1h, Ran Hou
It is centrifuged 5～10min under 3600～4000 r/min, supernatant liquid is poured out, obtains rehabilitating soil.
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Cited By (1)
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|---|---|---|---|---|
| CN116603855A (en) * | 2023-06-06 | 2023-08-18 | 四川省核工业辐射测试防护院（四川省核应急技术支持中心） | Utilize microorganism to restore cyclic treatment device of uranium lead contaminated soil |
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| 陈春乐，王果等: "3种中性盐与HCL复合淋洗剂对Cd污染土壤淋洗效果研究", 《安全与环境学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603855A (en) * | 2023-06-06 | 2023-08-18 | 四川省核工业辐射测试防护院（四川省核应急技术支持中心） | Utilize microorganism to restore cyclic treatment device of uranium lead contaminated soil |
| CN116603855B (en) * | 2023-06-06 | 2024-01-02 | 四川省核工业辐射测试防护院（四川省核应急技术支持中心） | Utilize microorganism to restore cyclic treatment device of uranium lead contaminated soil |
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