CN108624325A - A kind of conditioner of heavy metal-passivated Polluted paddy soil and its application - Google Patents
A kind of conditioner of heavy metal-passivated Polluted paddy soil and its application Download PDFInfo
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- CN108624325A CN108624325A CN201810602855.XA CN201810602855A CN108624325A CN 108624325 A CN108624325 A CN 108624325A CN 201810602855 A CN201810602855 A CN 201810602855A CN 108624325 A CN108624325 A CN 108624325A
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- soil
- magnesium phosphate
- calcium magnesium
- charcoal
- passivated
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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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- 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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
-
- 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
- C09K2101/00—Agricultural use
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of conditioners of heavy metal-passivated Polluted paddy soil, are made of cow dung charcoal and calcium magnesium phosphate.Conditioner of the present invention produces unpredictable synergistic effect, it reduces heavy metal-polluted soil available state, the effect of crops edible part content of beary metal is far longer than the effect that cow dung charcoal and calcium magnesium phosphate are used alone, improve the adverse effect that single inorganic passivant brings soil environment, and there is great practice significance to reducing agricultural land soil fertilizer application amount, alleviating farmland soil heavy metals pollution of area source, simultaneously, charcoal can be used as the synergistic carrier of calcium magnesium phosphate, and calcium magnesium phosphate counteracts the innutritive drawback of charcoal.Present invention passivation repairing efficiency is shorter, and can simultaneously several Heavy Metallic Elements be played with the effect of biological effectiveness passivation simultaneously, can preferably meet the condition requirement of heavy-metal contaminated soil passivation reparation.
Description
Technical field
The invention belongs to Farmland Soil Pollutions to be passivated field, more particularly to a kind of conditioning of heavy metal-passivated Polluted paddy soil
Agent and its application.
Background technology
Farmland soil heavy metals pollution is increasingly closed extensively due to being related to agricultural production, human and animal's health etc.
Note.China's farmland soil heavy metals pollution condition is troubling, but most of contaminated soil belongs in heavy metal, slight pollution.
If above-mentioned pollution level is relatively low, contaminated area is larger farmland stops normal agricultural production, and use high investment, highly energy-consuming
Physico-chemical process is passivated, or using the plant passivating method of low input, period length, this is clearly not meet reality
's.Therefore, how under the premise of ensureing crop production safety and improving soil environment quality, it is dirty to carry out heavy metal mild or moderate
The passivation research work for contaminating agricultural land soil, be realize safe efficient and Agricultural Sustainable Development there is an urgent need to.
Phosphorous conditioner is widely used in the passivation of the contaminated soils such as Cd, Cu, Pb, Zn due to the advantages that its is efficient.Calcium
Magnesium-phosphorus fertilizer is common improvement conditioner, can improve crop yield using phosphate fertilizer and reduce crop Cd pollutions.Calcium magnesium phosphate
Itself forms with heavy metal and precipitates, and the competition of Calcium in Plants and heavy metal absorbs the biological effectiveness that can also reduce heavy metal-polluted soil.
Therefore, using calcium magnesium phosphate can it is economical, be effectively reduced absorption of the crop to heavy metal.However, excessive phosphate fertilizer is added in soil
The loss that may cause phosphorus, so as to cause body eutrophication, in addition, excessive phosphorus is due between other nutrients in soil
Antagonism crop can be induced to lack the trace elements such as Fe, Zn, to influence crop yield.
20 middle of century, Amazon black earth（Terra preta）Discovery open charcoal research prelude.From
After Hilton etc. has found black wood charcoal to the good adsorption effect of fenuron etc., related charcoal is to heavy metal in soil environment
Migration, returns the research for the influences such as become gradually to attract attention at Forms Transformation.Using charcoal as a kind of improvement conditioner or controlled release tune
It manages agent and applies heavy metal pollution agricultural land soil, not only can largely digest agricultural abandoned biomass resource, but also to reducing farmland
Chemical fertilizer in soil usage amount alleviates farmland soil heavy metals pollution of area source with great practice significance.
Invention content
The technical problem to be solved by the present invention is to overcome the defects of existing heavy metal pollution of soil and passivating technique deficiency, carry
For a kind of new conditioning agent prescription and the conditioner to heavy metal（Cd、Cu、Pb、Zn）The method of combined pollution rice soil passivation,
Heavy metal pollution rice soil is improved by conditioner, reduces uptake and accumulation of the agricultural product to heavy metal, realizes efficient, the peace of agricultural
Complete and sustainable development.
Above-mentioned purpose of the present invention is achieved through the following technical solutions：A kind of conditioner of heavy metal-passivated Polluted paddy soil
Using the conditioner is made of cow dung charcoal with calcium magnesium phosphate.
Through experimental studies have found that preferably, 1.5 are pressed by cow dung charcoal and calcium magnesium phosphate：The weight ratio group of 0.2-0.8
At more preferably 1.5：The weight ratio of 0.4-0.8 forms, and further preferably presses 1.5：0.4 or 1.5：0.8 weight ratio
Composition.
The present invention also provides utilize the method such as the heavy metal-passivated Polluted paddy soil of above-mentioned conditioner, it is characterised in that：It will
The passivator is uniformly mixed with soil to be passivated and is passivated.
It is found through experiment, passivator quality is the 0.15% ~ 5% of soil quality to be passivated, preferably 0.18% ~ 3.8%, more excellent
It is selected as 0.19% or 3.8%.Further, above-mentioned conditioner applied amount is 1.5%w/w cow dungs charcoal and 0.8%w/w calcium and magnesium phosphorus
Fertilizer.
Further, soil moisture content is maintained at 50-70%, preferably 60% in passivating process, be passivated at room temperature to
It is 30 days few.
It is good heavy metal-polluted soil passivation conditioning although charcoal and calcium magnesium phosphate all have stronger suction-operated
Agent, but without the report how of effect associated with the two.Inventor has found that charcoal can be used as the synergistic carrier of calcium magnesium phosphate,
Charcoal and calcium magnesium phosphate, which mix, to be applied or is acted on by the cooperative compensating of the two with Shi Houke and reach notable fertilizer efficiency, this is primarily due to give birth to
Object charcoal extends the acquisition time of calcium magnesium phosphate nutrient as slow-released carrier, reduces nutrient loss, improves utilization rate of fertilizer, reductionization
Fertile amount of application.Meanwhile calcium magnesium phosphate counteracts the innutritive drawback of charcoal.Show relative to existing especially by experiment
There is technology, present invention obtains following advantages and technique effects：
1, the conditioner that the present invention is prepared after assembling cow dung charcoal and calcium magnesium phosphate produces unpredictable synergistic effect,
It reduces heavy metal-polluted soil available state, the effect of crops edible part content of beary metal is far longer than cow dung charcoal and calcium and magnesium
The effect that phosphate fertilizer is used alone.Especially when the ratio of cow dung charcoal and calcium magnesium phosphate is the authenticated passivator of embodiment,
It can make the level that Cd, Cu, Pb, Zn content are preferably minimized in Cd, Cu, Pb, Zn bio-available Zn concentration and crops simultaneously, to soil
Cd, Cu, Pb, Zn can play preferable passivation effect, minimum to the harm of crops.
2, the present invention uses cow dung charcoal and calcium magnesium phosphate for additive, by different passivations, to soil into
Row Passivation Treatment.Then heavy metal-polluted soil available state and plant content of beary metal etc. before and after the processing are compared and stabilizes effect to analyze it
Fruit can be better protected from other unexpected bad feedbacks and occur to determine preferably stabilizing formulation.
3, the cow dung charcoal selected of the present invention and calcium magnesium phosphate are organic combining with inorganic passivant, are improved single
The adverse effect that inorganic passivant brings soil environment, and to reducing agricultural land soil fertilizer application amount, alleviating agricultural land soil weight
Metal pollution of area source has great practice significance, meanwhile, charcoal can be used as the synergistic carrier of calcium magnesium phosphate, charcoal conduct
Slow-released carrier extends the acquisition time of calcium magnesium phosphate nutrient, reduces nutrient loss, improves utilization rate of fertilizer, reduces chemical fertilizer application
Amount.Meanwhile calcium magnesium phosphate counteracts the innutritive drawback of charcoal.
4, cow dung charcoal used by inventing is a kind of preferable environmentally protective money scrap concrete processing and utilized
Source, the passivation for being applied to heavy metal pollution rice soil is repaired, with pollution treatment of giving up, while with good economic efficiency and ring
Border benefit.
5, present invention passivation repairing efficiency is shorter, and it is blunt to play biological effectiveness simultaneously to several Heavy Metallic Elements simultaneously
The effect of change can preferably meet the condition requirement that heavy-metal contaminated soil passivation is repaired.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
One, the formula of the conditioner of heavy metal-polluted soil
The present invention is passivated the formula of the conditioner of heavy metal-polluted soil respectively such as table 1（Group 1 is control group）It is shown（Relative to processing soil
Earth）.
Wherein, calcium magnesium phosphate is bought from market, the production of phosphate fertilizer plant of Zhongxiang Hubei city, the calcium magnesium phosphate main component：
Ca3(PO4)2、CaSiO3、MgSiO3, wherein containing Cd 0.02mg/kg, Cu 27.98, Pb 52.30mg/kg, Zn 147.57
Mg/kg, form are pewter powder, and granularity is more uniform.
Two, the method for the heavy metal-passivated Polluted paddy soil of conditioner
By passivator of the present invention（Passivator as described in organizing 1 ~ 9）It is uniformly mixed with soil to be passivated, passivator quality is blunt to wait for
Change the 0.4% ~ 3.8% of soil quality；Soil moisture content is maintained at 60%, is passivated at room temperature at least 30 days.
Polluted agricultural land arable layer is disassembled with the Guangdong Province towns Qingyuan City Long Tang electronic waste（0-20cm）Rice soil is experiment pair
As rejecting stone and plant residue, air-drying and cross 5mm nylon mesh, this is for 2.44mg/kg containing Cd, Cu 422.90 in examination soil
Mg/kg, Pb 224.25mg/kg, Zn 374.89mg/kg.
Setting 9 groups of processing corresponding with formula altogether（Group 1 is control group）, every group of experiment is about 2.5kg with soil, used in every group
The specific ingredient of passivator is as shown in table 2.
Under room temperature at 25 DEG C, each group is separately added into passivating material as shown above, is uniformly mixed and with ultrapure water management
Water content in soil, it is suitable with field soil water content, it is maintained at 60%, is sown into 10, Lettuce seed after stablizing 30 days, three
Thinning is to 3 plants after the leaf phase.Lettuce harvests after growing about 40 days, and acquires pedotheque and plant sample.Pedotheque is in the moon
Liang Chu quarterings after natural air drying take 50g, ground and nylon mesh, pack sealing excessively spare.Lettuce sample is divided into cauline leaf
And root system, it is rinsed well with tap water, distilled water, deionized water after weighing fresh weight respectively, is finished through 105 DEG C repeatedly successively
0.5h, 60 DEG C crush and cross nylon mesh after drying to constant weight, and pack sealing is spare.Cd, Cu, Pb, Zn in detection experiment soil
Cd, Cu, Pb, Zn content in available state and crops body.Testing result is shown in Table 3- tables 4.
Table 3 compared with the control each group Passivation Treatment after 30 days heavy metal-polluted soil available state reduce percentage（%）
Table 3 the result shows that, cow dung charcoal, calcium magnesium phosphate be used alone effect not as good as cow dung charcoal and calcium magnesium phosphate
The effect used is assembled, this explanation, the conditioner prepared after cow dung charcoal and calcium magnesium phosphate are assembled produces unpredictable
Synergistic effect, the effect for reducing heavy metal-polluted soil available state is far longer than what cow dung charcoal and calcium magnesium phosphate were used alone
Effect, soil available cadmium, Cu, Pb, Zn content highest can reduce by 60.00%, 80.20%, 100%, 100% respectively.In summary,
Conditioner obtained more can significantly reduce heavy metal in soil available state and contain together with cow dung charcoal is assembled with calcium magnesium phosphate
Amount, when the adding proportion of cow dung charcoal and calcium magnesium phosphate is 3.0%w/w cow dung charcoals and 0.8%w/w calcium magnesium phosphate（In group 9
Passivator）When, soil available cadmium, Cu, Pb, Zn content can be made to drop to relatively minimum level, but work as adding proportion simultaneously
For 1.5%w/w cow dungs charcoal and 0.8%w/w calcium magnesium phosphate（Passivator in group 6）When, it can be in relatively fewer applied amount pair
Soil Cd, Cu, Pb, Zn play preferable passivation effect.
The each group Passivation Treatment Lettuce edible part content of beary metal after 30 days compared with the control of table 4（mg/kg）
Table 4 the result shows that, when single application cow dung charcoal or calcium magnesium phosphate, Lettuce edible part Cd, Cu, Pb, Zn is effective
State content can be also significantly reduced, but its too late cow dung charcoal and calcium magnesium phosphate with obvious effects are assembled using group, Lettuce
Edible part Cd, Cu, Pb and Zn content maximum reduces by 34.78%, 20.83%, 66.04% and 39.42% respectively, this is furtherly
Bright, the conditioner prepared after cow dung charcoal and calcium magnesium phosphate are assembled produces unpredictable synergistic effect, reduces agriculture
The effect that the effect of crop total metals is far longer than cow dung charcoal, calcium magnesium phosphate is used alone.When cow dung charcoal and
The adding proportion of calcium magnesium phosphate is 3.0%w/w cow dungs charcoal and 0.8%w/w calcium magnesium phosphate（Passivator in group 9）When, it can be same
When so that Lettuce edible part Cd, Cu, Pb, Zn content is dropped to relatively minimum level, but be 1.5%w/w cow dungs in adding proportion
Charcoal and 0.8%w/w calcium magnesium phosphate（Passivator in group 6）When, can in relatively fewer applied amount to soil Cd, Cu, Pb,
The effect that Zn plays preferable passivation effect, reduces crops by heavy metal pollution risk.
Claims (8)
1. a kind of conditioner of heavy metal-passivated Polluted paddy soil, it is characterised in that：It is by cow dung charcoal and calcium magnesium phosphate group
At.
2. conditioner as described in claim 1, it is characterised in that：1.5 are pressed by cow dung charcoal and calcium magnesium phosphate：0.2-0.8
Weight ratio composition.
3. conditioner as described in claim 1, it is characterised in that：1.5 are pressed by cow dung charcoal and calcium magnesium phosphate：0.4-0.8
Weight ratio composition.
4. conditioner as described in claim 1, it is characterised in that：1.5 are pressed by cow dung charcoal and calcium magnesium phosphate：0.4 or
1.5：0.8 weight ratio composition.
5. using the method for the heavy metal-passivated Polluted paddy soil of the conditioner as described in any one of Claims 1-4, feature exists
In：The passivator is uniformly mixed with soil to be passivated and is passivated.
6. method as claimed in claim 5, it is characterised in that：Passivator quality is the 0.15% ~ 5% of soil quality to be passivated,
Preferably 0.18% ~ 3.8%, more preferably 0.19% or 3.8%.
7. method as claimed in claim 5, it is characterised in that：Relative to soil quality to be passivated, the conditioner applied amount
For 1.5%w/w cow dungs charcoal and 0.8%w/w calcium magnesium phosphate.
8. the method as described in claim 5 or 6 or 7, it is characterised in that：Soil moisture content is maintained at 50- in passivating process
70%, preferably 60% are passivated at least 30 days at room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602855.XA CN108624325A (en) | 2018-06-12 | 2018-06-12 | A kind of conditioner of heavy metal-passivated Polluted paddy soil and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602855.XA CN108624325A (en) | 2018-06-12 | 2018-06-12 | A kind of conditioner of heavy metal-passivated Polluted paddy soil and its application |
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| Publication Number | Publication Date |
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| CN108624325A true CN108624325A (en) | 2018-10-09 |
Family
ID=63691542
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| CN201810602855.XA Withdrawn CN108624325A (en) | 2018-06-12 | 2018-06-12 | A kind of conditioner of heavy metal-passivated Polluted paddy soil and its application |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180887A (en) * | 2019-03-22 | 2019-08-30 | 江苏长三角环境科学技术研究院有限公司 | Duckweed charcoal and its application method for heavy metal-polluted soil Pb, Cd combined pollution curing/stabilizing |
| CN112592240A (en) * | 2020-11-26 | 2021-04-02 | 标优美生态工程盐城有限公司 | Bio-carbon-based composite conditioner for repairing soil cadmium pollution and preparation method thereof |
| US11124461B2 (en) | 2019-07-04 | 2021-09-21 | Incitec Pivot Limited | Fertilizer |
| CN114539001A (en) * | 2022-03-03 | 2022-05-27 | 南京思农生物有机肥研究院有限公司 | Microbial remediation agent for heavy metal moderately and slightly polluted soil and preparation method thereof |
-
2018
- 2018-06-12 CN CN201810602855.XA patent/CN108624325A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180887A (en) * | 2019-03-22 | 2019-08-30 | 江苏长三角环境科学技术研究院有限公司 | Duckweed charcoal and its application method for heavy metal-polluted soil Pb, Cd combined pollution curing/stabilizing |
| US11124461B2 (en) | 2019-07-04 | 2021-09-21 | Incitec Pivot Limited | Fertilizer |
| US11691929B2 (en) | 2019-07-04 | 2023-07-04 | Incitec Fertilizers Pty Limited | Fertiliser |
| CN112592240A (en) * | 2020-11-26 | 2021-04-02 | 标优美生态工程盐城有限公司 | Bio-carbon-based composite conditioner for repairing soil cadmium pollution and preparation method thereof |
| CN114539001A (en) * | 2022-03-03 | 2022-05-27 | 南京思农生物有机肥研究院有限公司 | Microbial remediation agent for heavy metal moderately and slightly polluted soil and preparation method thereof |
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Application publication date: 20181009 |