CN107312543A - A kind of heavy metal polluted soil of farmland repairs the preparation method of mineralizer - Google Patents
A kind of heavy metal polluted soil of farmland repairs the preparation method of mineralizer Download PDFInfo
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- CN107312543A CN107312543A CN201710546245.8A CN201710546245A CN107312543A CN 107312543 A CN107312543 A CN 107312543A CN 201710546245 A CN201710546245 A CN 201710546245A CN 107312543 A CN107312543 A CN 107312543A
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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
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
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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
- C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
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Abstract
The present invention relates to the preparation method that a kind of heavy metal polluted soil of farmland repairs mineralizer, by a certain percentage, calcium chloride, calcium aluminate, aluminum oxide, calcium hydroxide and water are added in the full back-mixing liquid film reactor of liquid-liquid diphase coprecipitation reaction simultaneously respectively, after disperseing through liquid distribution trough, it is sufficiently mixed at gap between rotor and stator, crystallizing kettle crystallization is discharged to through discharging opening, purity of the particle size between 20nm~5 μm is made up to more than 99.9% mineralizer powder.The advantage of the invention is that：Mineralizer prepared by the present invention can adsorb the heavy metal ion in agricultural land soil, by heavy metal ion stable curing in mineralizer, it is made to lose activity, simultaneously, the raw material that the present invention is selected is calcium chloride, calcium aluminate, aluminum oxide and calcium hydroxide, it is common raw material, thus raw material is easy to get, and then greatly reduce the preparation cost of mineralizer.
Description
Technical field
The invention belongs to environmental technology field, it is related to remediation contaminated soil technical field, especially relates to
And a kind of heavy metal polluted soil of farmland repairs the preparation method of mineralizer.
Background technology
Soil is a kind of very important natural resources, is also the basis of a National agricultural development.Soil is used as agricultural
It is basic, be the source of base stock for the survival of mankind.The reparation of heavy-metal contaminated soil is a great problem now, and
Heavy metal therein generally refers to the significant element of several bio-toxicities such as Cd, Pb, Cr, Zn, Hg and metalloid As, with
And the common elements such as Mn, Ni, Cu.
Because heavy metal pollution has generality, disguised or latency, irreversibility, indirect hazard and the poly- property of table
Feature, it constantly can be in vivo enriched with by food chain, eventually arrive at food chain top, and accumulation is so as to endanger in human body
The health of victimization class, therefore heavy metal pollution of soil increasingly causes the concern of people.According to statistics, China is by a different degrees of huge sum of money
Belong to the cultivated area of pollution close to 2 × 105 km2, the 15% of total cultivated area is accounted for, every year caused by heavy metal pollution
Grain drop in production is more than 1.0 × 107 t, contaminated by heavy metals grain up to 1.2 × 107 t, total economic loss at least 200
Hundred million yuan.It is reported that, one of environmental problem that current area is most wide, harm is maximum is heavy metal pollution.Heavy metal pollution of soil is given
While agricultural planting, soil fertility and the yield and quality of crop bring many adverse effects, ecological environment and the mankind
Life and health also receive huge threat, if Japanese minamata disease as caused by organic mercury is exactly typical illustration.Due to
The complex characteristics of biological effect and heavy metal pollution toxicity mechanism, heavy metal pollution is always the focus of current research.Therefore, it is
Environmental quality can obtain bigger improvement, and the mankind can preferably survive, it would be desirable to sustainable development of according with one's environment
Trend, heavy metal contaminated soil administer on a large scale and restoration of the ecosystem.
Existing processing method mainly has：Soil moved in improve the original/soil replacement method：Heavy metal pollution of soil and the soil replacement method substantial amounts of financial resources of loss in need with
The shortcoming of manpower, so, it is only applicable to the improvement of the small area soil of seriously polluted area.
Mineral absorption method：Its quantities is larger, investment cost is high, and destruction soil texture, soil fertility is declined therewith,
And also to handle the dirt soil swapped out.
Wash pouring method：Washing pouring method can easily be recycled, but after being extracted to contaminated by heavy metals soil,
The content of several nutrients such as potassium, calcium, magnesium, iron, manganese will be reduced in soil, and the validity of which part nutrient is also therewith
Reduction, and quantities is big.
Biological restoration：Biological prosthetic effect preferably, and is easily operated, but its repairing efficiency is longer, and plant counterweight
There is Passive intake due to differing greatly for ambient concentration in the absorption of metal.So the technology also in experiment and is demonstrated at present
Stage.
Heavy metal ion mineralising method：Product is directly sprayed onto to contaminated soil surface, medicament naturally osmotic and a huge sum of money
Belong to ionic reaction, produce water insoluble, soda acid stable compound, play mineralization so that heavy metal ion is not migrated.
Through retrieval, the A of patent CN 104962292 disclose out it is a kind of be used for handle soil heavy metal ion mineralizer and
Its synthetic method, the parts by weight proportioning of mineralizer is 5-15 parts of methyl vinyl ethers, 10-20 parts of maleic anhydrides, 20-30 parts
Ethyl acetate, 5-8 parts of sodium peroxydisulfates, 0.05-0.1 parts of dilauroyl peroxides, 5-8 parts of ammonium dihydrogen phosphates, 5-8 parts of thiosulfuric acids
Sodium, 10-20 parts of sodium carbonate, 10-30 parts of water.The heavy metal ion mineralizer that the present invention is developed, has very for heavy metal ion
Good mineralization ability, can be widely applied to the ground such as farmland, industrial sites, gobi, the desert polluted by heavy metal ion, it may also be used for
The improvement of domestic sludge, industrial sludge containing heavy metal ion and waste liquid of drilling and oily sludge in oil field etc. and repair
It is multiple, it is a kind of medicament of environmental protection；But the invention is used to handle the mineralizer of soil heavy metal ion, its raw material prepared into
Split-phase is to more, and some costs of material are of a relatively high so that prepare cost of a relatively high.
The content of the invention
The technical problem to be solved in the present invention is to provide the preparation side that a kind of heavy metal polluted soil of farmland repairs mineralizer
Method, the mineralizer heavy metal ion prepared by the preparation method has fine mineralization ability, and prepared by the preparation method
Cost is low.
In order to solve the above technical problems, the technical scheme is that：A kind of heavy metal polluted soil of farmland repairs mineralising
The preparation method of agent, its innovative point is：Comprise the following steps：
（1）From the full back-mixing liquid film reactor of liquid-liquid two-phase coprecipitation reaction, it, as stator, is determined by the casing of a closing
There is a rotatable cone-shaped rotor in son, the outer surface of rotor and the inner surface of stator are respectively provided with groove, rotor cross-section
The small one end of product carries liquid distribution trough, and stator is provided with raw material inlet and discharging opening, and inlet is accumulated positioned at rotor cross-section
Small one end, discharging opening is located at rotor cross-section and accumulates big one end, and one is left between stator inner surface and rotor outer surface
The gap of adjustable size, gap size can by the change of rotor and stator relative position between 1~20 μm modulation；
（2）By a certain percentage, calcium chloride, calcium aluminate, aluminum oxide, calcium hydroxide and water are added into step simultaneously respectively（1）It is anti-
Answer in device, after disperseing through liquid distribution trough, be sufficiently mixed at the gap between rotor and stator, crystallization is discharged to through discharging opening
Kettle crystallization, is made purity of the particle size between 20nm~5 μm up to more than 99.9% mineralizer powder；Control turning for rotor
Speed is 4000~10000rpm, and the flow of discharging opening is mixed serum in 200~1200kg/h, crystallizing kettle at 80~150 DEG C
Under be stirred, 8~20h of crystallization.
Further, the mol ratio of the calcium chloride, calcium aluminate, aluminum oxide, calcium hydroxide and water is 1.12:1.45:
1.1:1:1。
The advantage of the invention is that：
（1）Heavy metal polluted soil of farmland of the present invention repairs the preparation method of mineralizer, and anion stratiform is prepared from coprecipitation
The basic technology of material sets out, using morphology, with full back-mixing liquid film reactor, using the microcosmic hybrid technology of pressure,
Two kinds of liquid reactants are sufficiently mixed rapidly at the gap between reactor rotor and stator and contacted, and material takes off rapidly after reaction
From reactor, nucleation, synchronous growth while realizing particle, so that the spy that material has particle size small and is evenly distributed
Property, and then the mineralizer prepared by preparation method of the present invention can adsorb the heavy metal ion in agricultural land soil, by heavy metal from
Sub- stable curing makes it lose activity in mineralizer, meanwhile, the raw material that the present invention is selected is calcium chloride, calcium aluminate, aluminum oxide
And calcium hydroxide, it is common raw material, thus raw material is easy to get, and then greatly reduce the preparation cost of mineralizer；
（2）Heavy metal polluted soil of farmland of the present invention repairs the preparation method of mineralizer, wherein, calcium chloride, calcium aluminate, oxidation
The mol ratio of aluminium, calcium hydroxide and water is 1.12:1.45:1.1:1:1, the mol ratio of each material is strictly controlled, and then cause system
There is fine mineralization ability for the mineralizer heavy metal ion gone out.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1, which is repaired for heavy metal polluted soil of farmland of the present invention in the preparation method of mineralizer, uses liquid-liquid two-phase coprecipitated
The structural representation of the full back-mixing liquid film reactor of shallow lake reaction.
Embodiment
The following examples can make professional and technical personnel that the present invention is more fully understood, but therefore not send out this
It is bright to be limited among described scope of embodiments.
Embodiment
The present embodiment heavy metal polluted soil of farmland repairs the preparation method of mineralizer, comprises the following steps：
（1）From the full back-mixing liquid film reactor of liquid-liquid two-phase coprecipitation reaction, as shown in figure 1, it is made by the casing of a closing
For stator 3, there is one to be arranged on rotatable cone-shaped rotor 4 on motor shaft 7 in stator 3, the outer surface of rotor 4 and stator it is interior
Surface is respectively provided with groove, and the small one end of the cross-sectional area of rotor 4 carries liquid distribution trough 2, and stator 3 is provided with raw material inlet 1
With discharging opening 6, inlet 1 is located at the small one end of the cross-sectional area of rotor 4, and discharging opening 6 is located at the big one end of the cross-sectional area of rotor 4,
And a gap by the adjusting size of screw thread 5 is left between the inner surface of stator 3 and the outer surface of rotor 4, gap size can pass through
The change of rotor and stator relative position modulation between 1~20 μm；
（2）It is 1.12 in molar ratio:1.45:1.1:1:1 calcium chloride, calcium aluminate, aluminum oxide, calcium hydroxide and water difference is simultaneously
Add step（1）Reactor in, through liquid distribution trough it is scattered after, be sufficiently mixed, pass through at the gap between rotor and stator
Discharging opening is discharged to crystallizing kettle crystallization, and purity of the particle size between 20nm~5 μm is made up to more than 99.9% mineralizer
Powder；The rotating speed for controlling rotor is 4000~10000rpm, and the flow of discharging opening is mixed in 200~1200kg/h, crystallizing kettle
Close slurries to be stirred at 80~150 DEG C, 8~20h of crystallization.
This product heavy-metal ion removal capacity experimental effect is (according to GB15618-2008《Soil environment quality mark
It is accurate》Contrasted) it is shown in Table 1.
Mineralizer repairing heavy metal polluted soil of farmland is repaired with heavy metal polluted soil of farmland of the present invention, is with matter by it
Measure percentage be 0.5% concentration, turned over by Cultivator, make mineralizer fully with heavy metal in soil contacted with ions, ooze naturally
Thoroughly, leaching experiment is done after 42 days, concentration of heavy metal ion is determined, while containing heavy metal ion soil to no sprinkling medicament
Leaching experiment (blank assay) is done, concentration of heavy metal ion is determined and is contrasted, calculate clearance, it the results are shown in Table 1.
Table 1
| Heavy metal ion | Blank test, concentration of heavy metal ion, mg/kg | Mineralizer mixing leaching test, concentration of heavy metal ion, mg/kg | Clearance |
| Cd | 0.05475 | 0.00675 | 91.32% |
| Cr | 0.03525 | 0.00181 | 94.89% |
| Zn | 0.4135 | 0.0185 | 90.08% |
| Cu | 0.04875 | 0.00162 | 96.67% |
It was found from upper table data：Heavy metal ion mineralizer heavy metal ion of the present invention has good removal ability, reaches
To standard requirement.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The skill of the industry
Art personnel are it should be appreciated that the present invention is not limited to the above embodiments, and described in above-described embodiment and specification is explanation
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (2)
1. a kind of heavy metal polluted soil of farmland repairs the preparation method of mineralizer, it is characterised in that：Comprise the following steps：
From the full back-mixing liquid film reactor of liquid-liquid two-phase coprecipitation reaction, its by the casing of a closing as stator, in stator
There is a rotatable cone-shaped rotor, the outer surface of rotor and the inner surface of stator are respectively provided with groove, and rotor cross-section product is small
One end carry liquid distribution trough, stator be provided with raw material inlet and discharging opening, inlet be located at rotor cross-section accumulate it is small
One end, discharging opening is located at rotor cross-section and accumulates big one end, and left between stator inner surface and rotor outer surface one it is adjustable
Save size gap, gap size can by the change of rotor and stator relative position between 1~20 μm modulation；
By a certain percentage, calcium chloride, calcium aluminate, aluminum oxide, calcium hydroxide and water are added into step simultaneously respectively（1）Reactor
In, after disperseing through liquid distribution trough, it is sufficiently mixed at the gap between rotor and stator, it is brilliant to be discharged to crystallizing kettle through discharging opening
Change, purity of the particle size between 20nm~5 μm is made up to more than 99.9% mineralizer powder；The rotating speed for controlling rotor is
4000~10000rpm, the flow of discharging opening is that the mixed serum in 200~1200kg/h, crystallizing kettle enters at 80~150 DEG C
Row stirring, 8~20h of crystallization.
2. heavy metal polluted soil of farmland according to claim 1 repairs the preparation method of mineralizer, it is characterised in that：Institute
The mol ratio for stating calcium chloride, calcium aluminate, aluminum oxide, calcium hydroxide and water is 1.12:1.45:1.1:1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710546245.8A CN107312543A (en) | 2017-07-06 | 2017-07-06 | A kind of heavy metal polluted soil of farmland repairs the preparation method of mineralizer |
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| CN201710546245.8A CN107312543A (en) | 2017-07-06 | 2017-07-06 | A kind of heavy metal polluted soil of farmland repairs the preparation method of mineralizer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936974A (en) * | 2017-11-14 | 2018-04-20 | 江苏隆昌化工有限公司 | A kind of method for reducing pollution of chromium farmland crops chromium content |
| CN109456769A (en) * | 2018-11-14 | 2019-03-12 | 江苏隆昌化工有限公司 | A kind of cleanly production technique of heavy-metal contaminated soil repair materials |
| CN109652078A (en) * | 2018-11-14 | 2019-04-19 | 江苏隆昌化工有限公司 | A kind of production method of heavy metal pollution agricultural land soil conditioner |
| CN111676019A (en) * | 2020-05-07 | 2020-09-18 | 江苏隆昌化工有限公司 | Preparation method of mineralizer for restoring farmland heavy metal contaminated soil |
| CN111889499A (en) * | 2020-06-12 | 2020-11-06 | 北京化工大学 | Super-stable mineralizer and application thereof in remediation of heavy metal contaminated soil |
| CN112390274A (en) * | 2020-09-28 | 2021-02-23 | 北京化工大学 | Hyperstable mineralizer for treating nickel pollution and application thereof in nickel-containing wastewater treatment and nickel-polluted soil remediation |
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| CN1358691A (en) * | 2000-12-14 | 2002-07-17 | 北京化工大学 | All return mixing-liquid film reactor and use in prepairng ultrafine anion layer shape material |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1358691A (en) * | 2000-12-14 | 2002-07-17 | 北京化工大学 | All return mixing-liquid film reactor and use in prepairng ultrafine anion layer shape material |
| CN101519221A (en) * | 2009-02-24 | 2009-09-02 | 上海大学 | Method for synthesizing hydrated calcium chloroaluminate |
Non-Patent Citations (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936974A (en) * | 2017-11-14 | 2018-04-20 | 江苏隆昌化工有限公司 | A kind of method for reducing pollution of chromium farmland crops chromium content |
| CN109456769A (en) * | 2018-11-14 | 2019-03-12 | 江苏隆昌化工有限公司 | A kind of cleanly production technique of heavy-metal contaminated soil repair materials |
| CN109652078A (en) * | 2018-11-14 | 2019-04-19 | 江苏隆昌化工有限公司 | A kind of production method of heavy metal pollution agricultural land soil conditioner |
| CN111676019A (en) * | 2020-05-07 | 2020-09-18 | 江苏隆昌化工有限公司 | Preparation method of mineralizer for restoring farmland heavy metal contaminated soil |
| CN111889499A (en) * | 2020-06-12 | 2020-11-06 | 北京化工大学 | Super-stable mineralizer and application thereof in remediation of heavy metal contaminated soil |
| CN111889499B (en) * | 2020-06-12 | 2022-07-08 | 北京化工大学 | Super-stable mineralizer and application thereof in remediation of heavy metal contaminated soil |
| CN112390274A (en) * | 2020-09-28 | 2021-02-23 | 北京化工大学 | Hyperstable mineralizer for treating nickel pollution and application thereof in nickel-containing wastewater treatment and nickel-polluted soil remediation |
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