CN108296276A - A method of the Rapid deactivation Cadmium in Soil based on amino-acid complex reallocation principle - Google Patents
A method of the Rapid deactivation Cadmium in Soil based on amino-acid complex reallocation principle Download PDFInfo
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- CN108296276A CN108296276A CN201810007510.XA CN201810007510A CN108296276A CN 108296276 A CN108296276 A CN 108296276A CN 201810007510 A CN201810007510 A CN 201810007510A CN 108296276 A CN108296276 A CN 108296276A
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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 discloses a kind of methods of the Rapid deactivation Cadmium in Soil based on amino-acid complex reallocation principle.Heavy metal cadmium (the Cd that glycine can be effectively and quickly passivated in soil is administered alone in the present invention2+), while dexterously being redistributed in soil solid-liquid two-phase by complexing of glycin and in conjunction with complex compound, make to go on more distribution of heavy metals to soil solid, is finally reached fast and efficiently heavy metal-passivated purpose.The method of heavy metal-passivated cadmium provided by the invention is simple, of low cost, does not need complicated combination of materials, and the production technology that need not be consumed energy does not need external source solid material and does precipitating reagent.And adversely affected there is no secondary pollution and to environment, it is environmental-friendly.
Description
Technical field
The invention belongs to environmental protections and heavy metal-polluted soil to administer field, more particularly to a kind of to be divided again based on amino-acid complex
The method of Rapid deactivation Cadmium in Soil with principle.
Background technology
China's soil quality and food security are in increasingly degradating trend, and 300,000,000 mu of whole nation arable land is by heavy metal pollution
It threatens, wherein the most serious with Cd pollutions, exceeded point position is ranked first in the whole country.Cd elements are frequently accompanied by mining, mine
Sour water is irrigated, atmospheric sedimentation enters agricultural land soil, the unreasonable use of chemical fertilizer and pesticide in farmland, but also Cd is in agricultural land soil
In constantly accumulate.This constitutes grave danger to China's agricultural production and income and grain security.
Cd Pollution in Soil range is wide, and mobility is strong, has concealment, and pollution type is various, and control difficulty is big, and pollution is latter
Aspect migrates into water table, on the one hand can form toxic action to crop, or even in crop cylinder accumulation, pass through agricultural product
Enter human body with drinking water, Cd is caused to be poisoned, influences human health.
Soil is once polluted by Cd, is difficult to thoroughly be eliminated.Due to Cd have it is easy to migrate, cannot be decomposed by the microorganisms,
The features such as biological concentration, agricultural land soil Cd, which pollutes common restorative procedure, at present Cd elements removal technology, Cd elements passivation skill
Art, phytoremediation technology, agronomy regulation measure.In existing administering method, Cd element removal technologies need modifying agent or
Method cost is higher, and inorganic used by Cd element passivating techniques and organic passivation agent often destroys soil texture and function,
And phytoremediation technology can be influenced by factors such as weather, soil types and cause some high enriching plants in specific region
It can not grow, agronomy regulation technology needs a large amount of inorganic fertilizer applied to also result in soil hardening and acidification, influences soil
Physicochemical property is finally that plant growth is obstructed.
Although some of the above method can alleviate Cd pollutions to a certain extent, all there is its limitation, Cd pollutions to ask
Inscribe urgent need to resolve.
Invention content
The primary purpose of the present invention is that overcoming in the prior art, reparation Cd polluted farmland soils are of high cost, may cause
The shortcomings that soil hardening and acidification with it is insufficient, providing glycine, the cadmium in Rapid deactivation soil is answered based on complexing reallocation principle
With.
The quick blunt of reallocation principle is complexed based on amino acid (glycine) another object of the present invention is to provide a kind of
Change the method for the cadmium in soil.The method have low raw-material cost, effect is good and takes effect rapidly, easy to operate, environment
It is friendly and the advantages that secondary pollution do not occur, it is applicable to polluted farmland soil large-area applications.
The purpose of the invention is achieved by the following technical solution：
Application of the glycine based on complexing reallocation principle cadmium in Rapid deactivation soil.
In the application, glycine is administered alone, cadmium (Cd in Rapid deactivation soil can be realized2+)；Described is sweet
Propylhomoserin is as cadmium passivator for cadmium in Rapid deactivation soil.
The complexing reallocation principle refers to：Amino acid (glycine) in the soil with Cd2+While forming complex compound,
So that complex compound is redistributed in soil solid-liquid two-phase, further makes to go on more distribution of heavy metals to soil solid, be finally reached
Heavy metal-passivated purpose.
A method of the cadmium in the Rapid deactivation soil based on complexing of glycin reallocation principle includes the following steps：
Glycine is added into the soil by heavy metal pollution, is handled at least 3 hours.
The concentration of the glycine of addition in the soil is preferably 700~800mg N/kg；Further preferably 750mg
N/kg。
The glycine is preferably the glycine of solution state.
The additive amount of the glycine solution is preferably the volume mass ratio by the glycine solution and soil
(mL/g)1:60~3:40 proportionings；Volume mass is further preferably pressed than 1:15 proportionings.
The concentration of the glycine solution is preferably 10~45mg N/mL；Further preferably 10~25mg N/mL；
More preferably 11.25mg N/mL.
The time of the processing is preferably at least 24 hours.
The temperature of the processing is preferably 25 ± 5 DEG C.
The processing is preferably constant temperature processing；The constant temperature processing preferably carries out in homoiotherm incubator.
The soil moisture content of the soil is preferably the 60 ± 10% of field capacity.
The soil is preferably topsoil；Further preferably thickness is the topsoil of 20cm.
The mechanism of action of the present invention：The present invention creatively utilize glycine, make glycine in the soil with Cd2+Shape is complexed
At organo-metallic compound；Meanwhile the present invention is also ingenious and effectively regard soil itself as complex adsorbent, makes complex compound
It is redistributed in soil solid-liquid two-phase, further makes to go on more distribution of heavy metals to soil solid, be finally reached a passivation huge sum of money
Belong to purpose.
The present invention has the following advantages and effects with respect to the prior art：
1. the present invention provides completely new heavy metal cadmiums (Cd) to be passivated thinking
The research team of the present invention, which is found that, is used alone the heavy metal that glycine can be effectively and quickly passivated in soil
Cadmium (Cd2+).The present invention is dexterously redistributed by complexing of glycin and in conjunction with complex compound in soil solid-liquid two-phase, is made more multiple
Metal is assigned to soil solid up, is finally reached fast and efficiently heavy metal-passivated purpose.
2. heavy metal-passivated method provided by the invention is simple, of low cost
The heavy metal passivating method of the present invention does not need complicated combination of materials, and the production technology that need not be consumed energy is not required to
Want external source solid material to do precipitating reagent, directly reallocated by complex compound, make heavy metal adsorption soil solid up.
3. technical scheme of the present invention is environmental-friendly, rapidly and efficiently
The present invention is by adding glycine into typical Cd polluted farmland soils, and passivation Cd is with obvious effects and speed is fast, sample
Product 48 hours Cd after processing2+Reduce 67%.Different with other Heavy Metal Pollution Control methods, the present invention is easy to operate, blunt
It is fast to change speed, has more exploitativeness on processing soil contamination problem.The present invention is easy to use, to environment reaction close friend.Ammonia
Base acid itself does not have toxicity, and degradation rate reduces over time in the soil, and at first 24 hours, degradation was completed to have reached
To 78.38%, reaction at this time tends towards stability.Substantially adversely affected there is no secondary pollution and to environment.
Description of the drawings
Fig. 1 is the structure chart of glycine.
Fig. 2 is that glycine is added to the interpretation of result figure that different time is acted on available state Cd after soil.
Fig. 3 is the rate of release interpretation of result figure that glycine is added to carbon dioxide release after soil.
Specific implementation mode
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1
After glycine (structure is as shown in Figure 1, be purchased from Aladdin Reagent Company) is formulated as glycine solution, it is added to
In by Cd contaminated soils.The physicochemical property of soil is shown in Table 1.
Basic physical and chemical of the table 1 for examination soil
Investigating addition amino acid, quickly (3h) is passivated the Cd in typical polluted farmland soil.
Two CK (control), TA (glycine) processing are respectively equipped with, 12 repetitions are each handled.It weighs and is equivalent to wind desiceted soil
Weight 30g's is fresh native (described for trying soil sample from the topsoil that thickness is 20cm) for trying, and is packed into 100mL polytetrafluoroethyl-nes
In alkene beaker.Glycine concentration is matched into 750mg N kg-1Soil is added, deionized water is used in combination to be adjusted to soil field maximum water holding
The 60% of amount；Control treatment is addition aliquots of deionized water.It is placed in 25 DEG C of homoiotherm incubators and cultivates.After experiment starts,
It is sampled respectively in 0,3h, randomly selects 3 repetitions of each processing every time, be fitted into polyethylene plastic bag, and measure it effectively
State Cd contents, main method are as follows：After taking pedotheque dry in vacuum freeze drier, ground rapidly under condition of ice bath
Mill crosses 1mm sieves, weighs 1.000g and be placed in 50mL plastic centrifuge tubes, 15mL 0.1mol L are added-1CaCl2Solution, capping
It is placed on 25 DEG C, shakes 1h under 200rpm rotating speeds, then centrifuge 10min in the case where rotating speed is 6000rpm, with No. 42 filters of whatman
Paper filters, and supernatant is taken to measure its Cd2+Content (be available state Cd contents), assay method referring to：Shuran He,Qin Lu,
Wenyan Li,et al.,Factors controlling cadmium and lead activities in different
parent material-derived soils from the Pearl River Basin,Chemosphere,182,
(2017)：509-516,doi：j.chemosphere.2017.05.007..
As a result as shown in table 2 and Fig. 2, pedotheque 3 hours CaCl after processing2- Cd reduces 11%.In soil
CaCl2- Cd concentration declines with the addition time of glycine and other Heavy Metal Pollution Control methods are the difference is that the party
Method can quickly and effectively be passivated the Cd in soil.
2 pedotheque of table, 3 hours passivation effects after processing
| Time (h) | CaCl2-Cd(mg kg-1) | CaCl2- Cd deactivation rates (%) |
| 3 | 0.1352 | 11 |
Embodiment 2
The present embodiment further investigates degree of passivation of the glycine addition to the Cd pollutions in typical agricultural land soil.
3 repetitions in two CK (control) involved in embodiment 1, TA (glycine) processing groups are chosen, are existed respectively
Experiment starts rear 6,12h and carries out sampling determination available state Cd contents, other operating procedures are the same as embodiment 1.
As a result as shown in Table 3 and Fig. 2, addition glycine CaCl after 6,12 hours2- Cd reduces 16%, 27% respectively.
3 glycine of table is to contaminated soil treated passivation effect
| Time (h) | CaCl2-Cd(mg kg-1) | CaCl2- Cd deactivation rates (%) |
| 6 | 0.1271 | 16 |
| 12 | 0.1100 | 27 |
Embodiment 3
The present embodiment further investigates the addition of the glycine involved by embodiment 2 to the Cd pollutions in typical agricultural land soil
Degree of passivation.
3 repetitions in two CK (control) involved in embodiment 1, TA (glycine) processing groups are chosen, are existed respectively
Carry out sampling determination available state Cd contents within 24,48 hours after experiment starts.
The results are shown in Table 4, addition glycine CaCl after 24,48 hours2- Cd reduces 30%, 65% respectively.
4 glycine of table is to contaminated soil treated passivation effect
| Time (h) | CaCl2-Cd(mg kg-1) | CaCl2- Cd deactivation rates (%) |
| 24 | 0.1068 | 30 |
| 48 | 0.0532 | 65 |
Embodiment 4
The present embodiment investigates degradation rate of the glycine in typical agricultural land soil involved by embodiment 1.
3 repetitions in two CK (control) involved in embodiment 1, TA (glycine) processing groups are chosen, soil is measured
Earth carbon dioxide releasing amount is to characterize the degradation rate of glycine in the soil.Soil carbon dioxide burst size is absorbed using lye
(Zang Yifei, Hao Mingde, Zhang Liqiong etc., long-term fertilization is to microbial biomass carbons and nitrogens and soil within 2015,26 years for titration measuring
The influence of breathing, it is ecological, 5：1445-1451).
The results are shown in Figure 3, and glycine is quickly converted to carbon dioxide also with the addition time in the soil, mineralising speed
Rate reduces over time, and at first 24 hours, reaction was completed to have reached 78.38%, and reaction at this time tends towards stability, to soil two
The influence of carbonoxide burst size reaches minimum, and therefore, the present invention is easy to use, to environment reaction close friend.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. application of the glycine based on complexing reallocation principle cadmium in Rapid deactivation soil.
2. application of the glycine according to claim 1 based on complexing reallocation principle cadmium in Rapid deactivation soil,
It is characterized in that：
The glycine is as cadmium passivator for cadmium in Rapid deactivation soil.
3. application of the glycine according to claim 1 based on complexing reallocation principle cadmium in Rapid deactivation soil,
It is characterized in that, the complexing reallocation principle refers to：
Glycine in the soil with Cd2+While forming complex compound, complex compound is set to be redistributed in soil solid-liquid two-phase, further
Make to go on more distribution of heavy metals to soil solid, is finally reached heavy metal-passivated purpose.
4. a kind of method of the cadmium in Rapid deactivation soil based on complexing of glycin reallocation principle, which is characterized in that including
Following steps：
Glycine is added into the soil by heavy metal pollution, is handled at least 3 hours.
5. the method for the cadmium in the Rapid deactivation soil according to claim 4 based on complexing of glycin reallocation principle,
It is characterized in that：
A concentration of 700~800mg the N/kg for adding glycine in the soil.
6. the method for the cadmium in the Rapid deactivation soil according to claim 4 based on complexing of glycin reallocation principle,
It is characterized in that：
The glycine is the glycine of solution state.
7. the method for the cadmium in the Rapid deactivation soil according to claim 4 based on complexing of glycin reallocation principle,
It is characterized in that：
The temperature of the processing is 25 ± 5 DEG C.
8. the method for the cadmium in the Rapid deactivation soil according to claim 4 based on complexing of glycin reallocation principle,
It is characterized in that：
The soil moisture content of the soil is the 60 ± 10% of field capacity.
9. the method for the cadmium in the Rapid deactivation soil according to claim 4 based on complexing of glycin reallocation principle,
It is characterized in that：
The soil is topsoil.
10. the method for the cadmium in the Rapid deactivation soil according to claim 4 based on complexing of glycin reallocation principle,
It is characterized in that：
The processing is constant temperature processing.
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| CN201810007510.XA CN108296276B (en) | 2018-01-04 | 2018-01-04 | Method for rapidly passivating soil cadmium based on amino acid complexation redistribution principle |
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| CN201810007510.XA CN108296276B (en) | 2018-01-04 | 2018-01-04 | Method for rapidly passivating soil cadmium based on amino acid complexation redistribution principle |
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| CN108296276B CN108296276B (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110016349A (en) * | 2019-04-26 | 2019-07-16 | 珠海三豫环保新材料科技有限公司 | A method of heavy metal soil remediation material is prepared using gangue |
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| CN104138894A (en) * | 2013-05-08 | 2014-11-12 | 中国科学院沈阳应用生态研究所 | Cadmium-contaminated soil enhanced repairing agent and application |
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| US5427247A (en) * | 1993-05-25 | 1995-06-27 | Lockheed Idaho Technologies Company | Method for mobilization of hazardous metal ions in soils |
| CN101992208A (en) * | 2009-08-14 | 2011-03-30 | 中国科学院沈阳应用生态研究所 | Method for restoring and using vegetable field soil combinedly polluted by cadmium and polycyclic aromatic hydrocarbon |
| CN104138894A (en) * | 2013-05-08 | 2014-11-12 | 中国科学院沈阳应用生态研究所 | Cadmium-contaminated soil enhanced repairing agent and application |
| CN106281341A (en) * | 2015-05-18 | 2017-01-04 | 南京凯杰环境技术有限公司 | A kind of heavy metal-polluted soil high-efficiency cleaning processes material |
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Cited By (1)
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| CN110016349A (en) * | 2019-04-26 | 2019-07-16 | 珠海三豫环保新材料科技有限公司 | A method of heavy metal soil remediation material is prepared using gangue |
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