CN110305662A - Soil conditioner and preparation method thereof - Google Patents
Soil conditioner and preparation method thereof Download PDFInfo
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- CN110305662A CN110305662A CN201811463738.6A CN201811463738A CN110305662A CN 110305662 A CN110305662 A CN 110305662A CN 201811463738 A CN201811463738 A CN 201811463738A CN 110305662 A CN110305662 A CN 110305662A
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- soil conditioner
- attapulgite
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- soil
- clinker
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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
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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
- C09K2101/00—Agricultural use
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention belongs to technical field of soil remediation, and in particular to a kind of soil conditioner and preparation method thereof.The preparation method includes the following steps: to provide attapulgite；It handles the attapulgite crushing to obtain attapulgite powder；Calcination process is carried out after the attapulgite powder is mixed with solid base, obtains clinker；The clinker is started the cleaning processing, the soil conditioner is obtained.Compared with prior art, this preparation method alkali charge is low, low energy consumption, process is simple, using attapulgite as primary raw material, source is extremely wide, therefore, have good industrial application value.
Description
Technical field
The invention belongs to technical field of soil remediation, and in particular to a kind of soil conditioner and preparation method thereof.
Background technique
Attapulgite, i.e. attapulgite or concave convex rod raw ore, also known as palygorskite (Palygorskite) or Palygorskite are
A kind of aqueous rich magnesium aluminosilicate clays mineral having chain layer structure, belong to natural non-metallic mineral material.The mineral are in soil
Shape, compact massive, are originated in sedimentary rock and weathering crust, and color is white, canescence, cinerous, celadon or weak tiffany light, soil
Matter is fine and smooth, there is oily soapy, light, property is crisp, and fracture is in conchoidal, and water imbibition is strong；Have viscosity and plasticity when wet, is received after dry
It reduces, water immersion disintegration, suspension meets electrolyte not flocculation sedimentation, therefore is widely used as adsorbent etc..Attapulgite it is siliceous
Amount reaches 40% or more, while it has a colloidal property, rheological property, catalytic performance, absorption property, cation exchange property,
Dispersion performance and expansion character, can be by the infiltration and extension of acceleration nutritional ingredient, nutrient needed for making its crops
Absorption greatly improves.The resource reserve of China's attapulgite is big, and development of exploitation level is low.Soil conditioning is produced using attapulgite
Agent can make full use of China's concave convex rod resource abundant, also provide safeguard for the safety of agricultural product.
China Central China and South China face serious acid soil heavy metal pollution problem at present, easily cause agricultural product
And underground water content of beary metal is exceeded, endangers resident's health.This product can neutralize soil acidity, the huge sum of money in mineralising soil
Belong to element, it is possible to provide silico-calcium potassium magnesium etc. promotes the element of plant growth, breaks soil hardening, chesson, improves Soil ventilation
Property, reduce the soil weight, promote soil microbial activities, enhancing soil rich water penetration；It improves soil, administer desert, water conservation
Drought resisting, enhancing disease-resistant crops ability, raising crop yield, improvement quality of agricultural product, recovery crops original ecological etc..
CN105174278A discloses a kind of preparation method of modified attapulgite and using modified attapulgite as primary raw material system
The method of standby soil conditioner, higher cost modified using microwave-assisted acid system；CN107267150A discloses a kind of bumps
Concave convex rod, is crushed merely by stick base inorganic mineral soil conditioner and preparation method thereof, sieves, cleans, drying, the system of pelletizing
, silicon cannot be excited, the Element releases such as magnesium are not adjustable acid soil pH value；A kind of concave convex rod base soil of CN106118679A
Conditioner and preparation method thereof, by selecting cationic surfactant trimethyl n-tetradecane ammonium bromide to have attapulgite
Machine is modified, improves its adsorption capacity；Using attapulgite modified as the carrier of herbicide rimsulfuron, prepared is recessed
Convex stick base pesticide has both weeding and adsorbs the effect of heavy metal in soil, the disclosure patent complex process, higher cost.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, a kind of soil conditioner and its preparation side are provided
Method, it is intended to solve the undesirable and at high cost technical problem of the soil remediation comprehensive performance effect of the attapulgite of existing modification.
For achieving the above object, The technical solution adopted by the invention is as follows:
One aspect of the present invention provides a kind of preparation method of soil conditioner, includes the following steps:
Attapulgite is provided；
It handles the attapulgite crushing to obtain attapulgite powder；
Calcination process is carried out after the attapulgite powder is mixed with solid base, obtains clinker；
The clinker is started the cleaning processing, the soil conditioner is obtained.
In the preparation method of soil conditioner provided by the invention, attapulgite is first ground into powder, it then will be concave-convex
Stick soil powder carries out calcination process after mixing with solid base, the attapulgite of one side powdered form can more fully connect with solid base
Touching, to make reaction more efficiently, quickly；It on the other hand, can by the chemical reaction in concave convex rod and solid base roasting process
The chemical property for changing concave convex rod, improves the pH value of reaction product, improves the aperture structure of reaction product, increase reaction
The specific surface area of product, can will be in soil simultaneously because ion exchange so as to improve the ion-exchange performance of product
Heavy metal ion exchanges in soil conditioner, forms stable compound, heavy metal ions in soil content is reduced, to reach
To the purpose of passivation heavy metal in soil.While exchanging heavy metal-polluted soil, concave convex rod itself contained silicon, calcium, magnesium etc.
Beneficial element release, provides nutrient for the plant growth in soil, reaches while administering heavy metal in soil for plant growth
The effect of beneficial element is provided.By the clinker cleaning after roasting, the pollutant or polymer for adhering to soil conditioner particle-surface
It goes divided by preferably absorption heavy metal and release beneficial element, formation has both heavy metal reparation and provides beneficial element for crop
The soil conditioner that two aspects act on.Preparation method alkali charge is low, low energy consumption for this, process is simple, is main former with attapulgite
Material, source is extremely wide, therefore, has good industrial application value.
Another aspect of the present invention provides a kind of soil conditioner, and the soil conditioner is by there is above-mentioned preparation side of the invention
Method is made.
Soil conditioner provided by the invention is made by the distinctive preparation method of the present invention, and the soil conditioner is in soil
Heavy metal have well absorption, can be used for administering heavy metal pollution of soil, and the soil conditioner can excite bumps
Silico-calcium magnesium elements, provide nutrient for plant growth possessed by stick soil raw material itself, therefore, have good industrial application valence
Value.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain
The present invention is not intended to limit the present invention.
On the one hand, the embodiment of the invention provides a kind of preparation method of soil conditioner, include the following steps:
S01: attapulgite is provided；
S02: it handles the attapulgite crushing to obtain attapulgite powder；
S03: calcination process is carried out after the attapulgite powder is mixed with solid base, obtains clinker；
S04: the clinker is started the cleaning processing, and obtains the soil conditioner.
In the preparation method of soil conditioner provided in an embodiment of the present invention, attapulgite is first ground into powder, then
Carry out calcination process after attapulgite powder is mixed with solid base, the attapulgite of one side powdered form can be more fully and solid
Body alkali contact, to make reaction more efficiently, quickly；On the other hand anti-by the chemistry in concave convex rod and solid base roasting process
It answers, the chemical property of concave convex rod can be changed, improve the pH value of reaction product, improve the aperture structure of reaction product, increase
The specific surface area of reaction product, can will be native simultaneously because ion exchange so as to improve the ion-exchange performance of product
Heavy metal ion in earth exchanges in soil conditioner, forms stable compound, reduces heavy metal ions in soil content,
To achieve the purpose that be passivated heavy metal in soil.While exchanging heavy metal-polluted soil, the contained silicon of concave convex rod itself,
The release of the beneficial elements such as calcium, magnesium, provides nutrient for the plant growth in soil, reaches while administering heavy metal in soil for work
Object growth provides the effect of beneficial element.By after roasting clinker cleaning, make soil conditioner particle-surface adhere to pollutant or
Polymer is gone divided by preferably absorption heavy metal and release beneficial element, and formation has both heavy metal reparation and is provided with for crop
The soil conditioner acted in terms of beneficial element two.Preparation method alkali charge is low, low energy consumption for this, process is simple, is with attapulgite
Primary raw material, source is extremely wide, therefore, has good industrial application value.
Further, in above-mentioned steps S01, attapulgite is a kind of aqueous rich magnesium aluminosilicate for having chain layer structure
Clay mineral, the preferably specific surface area of attapulgite are 1-50m2/g；The concave convex rod has the characteristics that large specific surface area, to a huge sum of money
Accessory has good adsorption effect.
Further, in above-mentioned steps S02, in order to make attapulgite and solid base more thorough roasting, also for being
Beneficial element in attapulgite handles attapulgite crushing to obtain attapulgite powder with discharging well.Preferably, it obtains
Attapulgite powder partial size be 50-100 mesh；It is highly preferred that commutative calcium ion amount is in the attapulgite powder
7.5-12.5mmol/100g；Commutative magnesium ion quantity 2.5-7.5mmol/100g, that is, pass through crushing in the attapulgite powder
It handles, the commutative calcium ion amount and commutative magnesium ion in attapulgite powder greatly increase.
It further, is 1:(0.1- by the mass ratio of the attapulgite powder and solid base in above-mentioned steps S03
1) calcination process is carried out after, the attapulgite powder is mixed with solid base.Concave convex rod powder is mixed with solid base to obtain the final product
To raw material, in the quality than in range, attapulgite powder can carry out thorough roasting with the raw material that solid base is mixed to form and react.
Further, the temperature of the calcination process is 300-600 DEG C；The time of the calcination process is 2-18h.Calcination process mistake
Cheng Zhong, it may occur that the reaction such as dehydration, decomposition, oxidation, reduction, agglomeration or pelletizing, and within the scope of the temperature and time, concave convex rod
The roasting effect of native powder and solid base is best.Further, calcination process carries out in rotary kiln, specifically, by raw material
Being put into rotary kiln after heating cooling is clinker.
Further, solid base includes sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, saleratus and bicarbonate
At least one of sodium.
It further, include: to be dissolved in water the clinker in the step of above-mentioned steps S04, the cleaning treatment, so
After be filtered and be dried.Preferably, the temperature in water that the clinker is dissolved in is 10-50 DEG C；The drying process
Temperature be 50-80 DEG C.Preferably, it is filtered into filters pressing processing.It, can be preferably by soil conditioner under above-mentioned cleaning condition
The pollutant of grain attachment is removed, so as to preferably adsorb heavy metal and release beneficial element.
On the other hand, the embodiment of the invention also provides a kind of soil conditioners, and the soil conditioner is by there is the present invention
The above-mentioned preparation method of embodiment is made.
Soil conditioner provided in an embodiment of the present invention is made by the distinctive preparation method of the embodiment of the present invention, the soil tune
Managing agent has absorption well to the heavy metal in soil, can be used for administering heavy metal pollution of soil, and the soil conditioning
Agent can excite silico-calcium magnesium elements possessed by attapulgite raw material itself, provide nutrient for plant growth, therefore, have good
Industrial application value.
Further, in soil conditioner provided in an embodiment of the present invention, the pH value of soil conditioner is 8-12；Because of soil
Conditioner is alkalinity, therefore the product is applied well in acid soil.
It is highly preferred that arsenogen cellulose content is less than 5mg/kg in the soil conditioner, rapid determination of content of cadmium element is less than 0.25mg/kg,
Mercury element is less than 0.20mg/kg；Lead element content is less than 50mg/kg, and chromium content is less than 50mg/kg.Because of content of beary metal
It is very low, therefore heavy metal can be adsorbed from soil, for repairing the acid soil of some heavy metals exceeding standards, exceeded heavy metal
It is one of the following or at least any two kinds of combination: lead, nickel, cadmium, chromium, copper, zinc, arsenic, antimony, mercury.It is highly preferred that the product soil
The heavy metal in soil concentration of conditioner application is 0.2mg/kg-100mg/kg.
Further, in soil conditioner provided in an embodiment of the present invention, the specific surface area of the soil conditioner is 1-
300m2/g；Concave convex rod after alkali roasts has bigger specific surface area, the soil conditioner pair under the conditions of the specific surface area
Heavy metal has good adsorption effect, it is preferable that the specific surface area of the soil conditioner is 50-300m2/ g, more preferably
Ground, the specific surface area of the soil conditioner are 200-300m2/g。
Further, in soil conditioner provided in an embodiment of the present invention, with the mass percent of the soil conditioner
It is counted for 100%, the mass percent of silica is 30-50% in the soil conditioner, and the mass percent of magnesia is 5-
20%, the mass percent of calcium oxide is 1-20%.I.e. in the soil conditioner, there is silicon-calcium-magnesium beneficial element abundant, more
It is beneficial to plant growth in soil.
The present invention successively carried out test of many times, and it is further detailed as reference pair invention progress now to lift A partial experiment result
Thin description, is described in detail combined with specific embodiments below.
Embodiment 1
A kind of preparation method of soil conditioner, includes the following steps:
1. attapulgite is crushed, 60 mesh screens are crossed, Attapulgite mineral powder is obtained；
2. Attapulgite mineral powder is uniformly mixed in homogenizer by the mass ratio of 5:2 with potassium hydroxide powder, then throw
Enter in rotary kiln and roasts 2 hours for 400 degrees Celsius, discharging cooling, as clinker；
3. dispersing clinker in 10 DEG C waters, pressure filtration washing；
4. filtering product is dried at 80 degrees celsius.
Comparative test 1:
First three days are turned over, according to soil conditioner made from the embodiment of the present invention 1, is manually thrown and is added to 400kg/ mus of ratios
Cadmium pollution acid soil paddy field, 15 centimeters of ploughed depth；Rice yield is P1, and cadmium content is C1 in rice.
First three days are turned over, is manually thrown according to natural concave convex rod with 400kg/ mus of ratios and adds to cadmium pollution acid soil rice
Field, 15 centimeters of ploughed depth；Rice yield is P2, and cadmium content is C2 in rice.
Blank test is set, and rice yield P3, cadmium content is C3 in rice；
Above three groups of test field management and soil fertility level are approximate consistent, and final result is as shown in table 1.
Table 1
Embodiment 2
A kind of preparation method of soil conditioner, includes the following steps:
1. attapulgite is crushed, 60 mesh screens are crossed, Attapulgite mineral powder is obtained；
2. Attapulgite mineral powder is mixed in homogenizer by the mass ratio of 5:1:0.5 with sodium hydroxide, potassium carbonate powder
Uniformly, it then puts into rotary kiln and roasts 2 hours for 400 degrees Celsius, discharging cooling, as clinker；
3. dispersing clinker in 10 DEG C waters, pressure filtration washing；
4. filtering product is dried at 80 degrees celsius.
Comparative test 2:
First three days are turned over, according to soil conditioner made from the embodiment of the present invention 2, is manually thrown and is added to 400kg/ mus of ratios
Cadmium pollution acid soil paddy field, 15 centimeters of ploughed depth；Rice yield is P1, and cadmium content is C1 in rice.
First three days are turned over, is manually thrown according to natural concave convex rod 400kg/ mus of ratios and adds to cadmium pollution acid soil paddy field,
15 centimeters of ploughed depth；Rice yield is P2, and cadmium content is C2 in rice.
Blank test is set, and rice yield P3, cadmium content is C3 in rice；
Above three groups of test field management and soil fertility level are approximate consistent, and final result is as shown in table 2.
Table 2
Know through the foregoing embodiment with comparative example: work not only can be improved in the soil conditioner of preparation of the embodiment of the present invention
Produce amount, and there is absorption repair function to the heavy metal in soil.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of preparation method of soil conditioner, which comprises the steps of:
Attapulgite is provided；
It handles the attapulgite crushing to obtain attapulgite powder；
Calcination process is carried out after the attapulgite powder is mixed with solid base, obtains clinker；
The clinker is started the cleaning processing, the soil conditioner is obtained.
2. preparation method as described in claim 1, which is characterized in that the specific surface area of the attapulgite is 1-50m2/g；
And/or
The partial size of the attapulgite powder is 50-100 mesh；And/or
Commutative calcium ion amount is 7.5-12.5mmol/100g in the attapulgite powder；And/or
Commutative magnesium ion quantity 2.5-7.5mmol/100g in the attapulgite powder.
3. preparation method as described in claim 1, which is characterized in that by the mass ratio of the attapulgite powder and solid base
For 1:(0.1-1), calcination process is carried out after the attapulgite powder is mixed with solid base.
4. preparation method as described in claim 1, which is characterized in that the temperature of the calcination process is 300-600 DEG C；With/
Or
The time of the calcination process is 2-18h.
5. preparation method as described in claim 1, which is characterized in that the solid base includes sodium hydroxide, potassium hydroxide, carbon
At least one of sour sodium, potassium carbonate, saleratus and sodium bicarbonate.
6. preparation method as described in any one in claim 1-5, which is characterized in that the step of cleaning treatment include: by
The clinker is dissolved in water, and is then filtered and is dried.
7. preparation method as claimed in claim 6, which is characterized in that the temperature in water for being dissolved in the clinker is 10-
50℃；And/or
The temperature of the drying process is 50-80 DEG C.
8. a kind of soil conditioner, which is characterized in that the soil conditioner is by the described in any item preparation sides claim 1-7
Method is made.
9. soil conditioner as claimed in claim 8, which is characterized in that the pH value of the soil conditioner is 8-12；And/or
The specific surface area of the soil conditioner is 1-300m2/g；And/or
It is the mass percent of silica in the soil conditioner in terms of 100% by the mass percent of the soil conditioner
For 30-50%, the mass percent of magnesia is 5-20%, and the mass percent of calcium oxide is 1-20%.
10. soil conditioner as claimed in claim 8, which is characterized in that in the soil conditioner, arsenogen cellulose content is less than
5mg/kg, rapid determination of content of cadmium element are less than 0.25mg/kg, and mercury element is less than 0.20mg/kg；Lead element content is less than 50mg/kg, chromium member
Cellulose content is less than 50mg/kg.
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| CN201811463738.6A CN110305662A (en) | 2018-12-03 | 2018-12-03 | Soil conditioner and preparation method thereof |
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| CN201811463738.6A CN110305662A (en) | 2018-12-03 | 2018-12-03 | Soil conditioner and preparation method thereof |
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| CN110305662A true CN110305662A (en) | 2019-10-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113214032A (en) * | 2021-06-11 | 2021-08-06 | 四川中农润泽生物科技有限公司 | Organic fertilizer for soil remediation and production process thereof |
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| CN108218618A (en) * | 2018-01-05 | 2018-06-29 | 昆明理工大学 | A kind of method that vermiculite modification prepares vermiculite base Si-K fertilizer |
| CN108410468A (en) * | 2018-04-02 | 2018-08-17 | 中国科学院广州地球化学研究所 | A kind of soil passivator and preparation method thereof |
| CN108531186A (en) * | 2018-05-21 | 2018-09-14 | 广东中金岭南环保工程有限公司 | A kind of soil heavy metal passivant and its preparation method and application |
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2018
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| CN108218618A (en) * | 2018-01-05 | 2018-06-29 | 昆明理工大学 | A kind of method that vermiculite modification prepares vermiculite base Si-K fertilizer |
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| CN113214032A (en) * | 2021-06-11 | 2021-08-06 | 四川中农润泽生物科技有限公司 | Organic fertilizer for soil remediation and production process thereof |
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