CN110606792A - Preparation method of soil conditioner based on paper mill sludge and vermiculite powder - Google Patents
Preparation method of soil conditioner based on paper mill sludge and vermiculite powder Download PDFInfo
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Abstract
The invention discloses a preparation method of a soil conditioner based on paper mill sludge and vermiculite powder, which comprises the following steps: drying and grinding the papermaking sludge to prepare papermaking sludge particles; mixing the inorganic composite particles with vermiculite powder, clay and plant ash, adding deionized water for granulation, then placing the mixture in a muffle furnace, and calcining to obtain inorganic composite particles; mixing inorganic compound particles, sodium dodecyl sulfate and deionized water to obtain a dispersion liquid; mixing acrylic acid, acrylamide, span80 and deionized water, adding the dispersion, N-methylene bisacrylamide and potassium persulfate to react, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive; and uniformly mixing the prepared composite additive, inorganic fertilizer, trace element fertilizer, microbial agent and humic acid to prepare the soil conditioner. The soil conditioner prepared by the invention has good stability, can effectively improve the physical and chemical properties of saline-alkali soil, and reduces the pH value and the salt content of the soil.
Description
Technical Field
The invention relates to the field of preparation of saline-alkali soil conditioners, in particular to a method for preparing a soil conditioner based on paper mill sludge and vermiculite powder.
Background
The land is a production element on which people live, but along with the rapid increase of the population, the land and the environment are unreasonably developed and utilized, the cultivated land area is continuously reduced, the fresh water resource is extremely deficient, and the problem of soil salinization is serious. At present, saline-alkali soil occupies a large proportion in the land and has great development and utilization values, but the saline-alkali soil has the defects of poor physicochemical property, low fertility, serious hardening and the like, so that the saline-alkali soil is very unfavorable for the growth of plants. In order to relieve the shortage of land resources in China and realize sustainable development of ecological environment, the saline-alkali soil needs to be improved and reused. The method for improving the saline-alkali soil mainly comprises the following steps: water conservancy improvement method: irrigation water and underground water are regulated and controlled by utilizing hydraulic engineering, so that the content of salt in the saline-alkali soil is reduced; physical improvement method: the method can improve the conditions of water, gas, heat and the like of the saline-alkali soil so as to improve the saline-alkali soil. In another method, a soil conditioner is added into the saline-alkali soil, and the physical and chemical properties of the saline-alkali soil are changed. The method has the advantages of simple operation, short period, obvious effect and wide application.
The soil conditioner is divided into water-soluble and oil-soluble, can play roles of fixing sand, fixing soil and improving soil when applied to soil, and can also effectively improve the yield of crops. The soil conditioner is mainly used for modifying saline-alkali soil from the following two aspects: firstly, the method can effectively agglomerate the saline-alkali soil particles, improve the saline-alkali soil structure and increase the porosity of the saline-alkali soil, thereby improving the permeability of the saline-alkali soil; secondly, the Na in the soil can be effectively replaced+And the leaching of salt is promoted, so that the salt content in the saline-alkali soil is reduced. The existing modifier mainly comprises inorganic solid waste, organic solid waste, natural high molecular compounds, organic matter materials, synthetic soil modifiers, biological modifiers and synthetic modifiers. The modifier can effectively improve the structure of the saline-alkali soil, improve the water and fertilizer retention capacity of the soil, and restore the weight of the soil to a certain degreeMetal pollution, but the effect is poor when the modifier is used singly, and multiple modifiers are often required to be compounded for use.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the method for preparing the soil conditioner based on the paper-making sludge and the vermiculite powder is provided, the method is simple to operate, the prepared conditioner is good in stability, the physicochemical structure of the soil can be effectively improved when the conditioner is used for improving the saline-alkali soil, the leaching of salt in the soil is promoted, and the salt ion removal rate is high.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge with a 200-mesh sieve to obtain paper-making sludge particles; mixing the paper making sludge particles with vermiculite powder, clay and plant ash, adding deionized water, stirring and mixing uniformly to obtain mixed particles with the particle size of 2-5 mm, placing the mixed particles in a muffle furnace, and calcining for 30-40 min under the protection of inert gas; cooling to room temperature after calcining to obtain inorganic composite particles;
(2) dispersing the prepared inorganic composite particles in deionized water under the action of sodium dodecyl sulfate to prepare dispersion liquid; mixing and stirring acrylic acid, acrylamide, span80 and deionized water uniformly, adding the prepared dispersion, mixing uniformly, adding N, N-methylene bisacrylamide and potassium persulfate, heating to 60-80 ℃, reacting for 1-3 h, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing the prepared composite additive, inorganic fertilizer, trace element fertilizer, microbial agent and humic acid to prepare the soil conditioner.
As a preferable technical scheme, in the step (1), the water content of the paper-making sludge particles is 3 wt% -5 wt%.
As a preferred technical scheme, in the step (1), the papermaking sludge particles, the vermiculite powder, the clay, the plant ash and the deionized water are respectively 1-3 parts by weight of the papermaking sludge particles, 1-2 parts by weight of the vermiculite powder, 7-11 parts by weight of the clay, 3-5 parts by weight of the plant ash and 8-10 parts by weight of the deionized water.
As an improved technical scheme, in the step (1), the calcining treatment conditions are as follows: firstly, calcining for 10min at 300-400 ℃; then calcining for 20-30 min at 700-800 ℃.
As a preferable technical solution, in the step (2), the mass ratio of the inorganic composite particles to the sodium lauryl sulfate is 1: (0.0015-0.02).
As a preferable technical scheme, in the step (2), the acrylic acid, the acrylamide, the span80, the deionized water, the inorganic composite particles, the N, N-methylene bisacrylamide and the potassium persulfate are respectively used in the following weight portions: 6-12 parts of acrylic acid, 1-3 parts of acrylamide, 800.15-0.35 part of span, 8-15 parts of deionized water, 0.8-1.2 parts of inorganic composite particles, 0.01-0.05 part of N, N-methylene bisacrylamide and 0.01-0.04 part of potassium persulfate.
As an improved technical scheme, in the step (3), the use amounts of the components are respectively as follows by weight parts: 1-5 parts of compound additive, 7-15 parts of inorganic fertilizer, 0.5-1.5 parts of trace element fertilizer, 0.01-0.03 part of microbial agent and 10-20 parts of humic acid.
As a preferable technical scheme, in the step (3), the inorganic fertilizer is one or a mixture of more of ammonium chloride, potassium phosphate, urea, diammonium hydrogen phosphate and potassium nitrate.
As a preferable technical scheme, in the step (3), the trace element fertilizer is one or a mixture of more of zinc sulfate heptahydrate, manganese sulfate, copper sulfate and ammonium molybdate.
As a preferable technical scheme, in the step (3), the microbial agent is one or a mixture of more of azotobacter, phosphate solubilizing bacteria, potassium solubilizing bacteria and halophilic bacteria.
The papermaking sludge is solid waste generated in the papermaking wastewater treatment process, has the characteristics of high water content, high fiber content and high sludge production rate, and mainly comprises fiber organic matters and clay inorganic matters, wherein the inorganic matters mainly comprise calcium oxide, silicon oxide, aluminum oxide, magnesium oxide and the like. In order to reduce the harm of the paper-making sludge to the environment, the paper-making sludge is often treated in a landfill mode, but the treatment mode not only occupies land resources, but also causes secondary pollution to the environment. The invention treats the paper making sludge, and then calcines the paper making sludge and other inorganic matters together to prepare the substance with large specific surface area and high activity, and the substance can effectively improve the physicochemical properties of soil when being used for improving saline-alkali soil.
The vermiculite powder is a hydrate, can be expanded after being burnt at high temperature, is rich in nitrogen, phosphorus, potassium, aluminum, iron, magnesium, silicate and other components, has higher cation exchange capacity and stronger cation adsorption capacity, has good water and fertilizer adsorption performance, can effectively form a salt separation layer in soil when being added into the saline-alkali soil, effectively improves the environment of the saline-alkali soil, and reduces the pH value of the saline-alkali soil.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the soil conditioner provided by the invention takes inorganic fertilizer and humic acid as main components, and is assisted by adding trace element fertilizer, microbial agent and self-made composite additive, so that the prepared soil conditioner has good stability, and when the soil conditioner is used for improving saline-alkali soil, on one hand, the components and the structure of the saline-alkali soil can be improved, the permeability of the soil is increased, and the leaching of salt in the soil is accelerated; on the other hand, the fertility of the saline-alkali soil can be improved, the evaporation of the water on the ground surface is reduced, and the salt return phenomenon is inhibited.
The self-made composite additive is prepared by taking papermaking sludge, vermiculite powder, clay and plant ash as main raw materials, adding water, mixing and granulating to prepare mixed particles, and calcining under certain conditions to prepare inorganic composite particles. In order to further improve the performance of the inorganic composite particles, the prepared inorganic composite particles are dispersed in deionized water under the action of sodium dodecyl sulfate to form a dispersion liquid; then, taking acrylic acid and acrylamide as polymerization monomers, N, N-methylene bisacrylamide as a cross-linking agent and potassium persulfate as an initiator for polymerization reaction to prepare a composite additive, wherein ionic groups in the acrylic acid and nonionic groups in the acrylamide are mutually cooperated, so that the salt resistance is favorably improved; the macromolecular chains of the sodium dodecyl sulfate adsorbed on the surfaces of the inorganic compound particles prepared by the method can also play a role of a cross-linking agent to a certain extent in polymerization reaction, so that a polymer taking the inorganic compound particles as a core is formed, and the compound additive with good salt resistance and water retention is prepared.
The preparation method of the saline-alkali soil conditioner disclosed by the invention is simple to operate, the adopted raw materials are cheap and easy to obtain, the preparation cost is greatly reduced, and the preparation method is energy-saving and environment-friendly.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Example 1
A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge through a 200-mesh sieve after treatment to prepare paper-making sludge particles with the water content of 3 wt%; mixing 1 part of papermaking sludge particles, 1 part of vermiculite powder, 7 parts of clay and 3 parts of plant ash in parts by weight, adding 8 parts of deionized water, stirring and mixing uniformly, then preparing mixed particles with the particle size of 2mm, placing the mixed particles in a muffle furnace, firstly calcining at 300 ℃ for 10min under the protection of inert gas, then calcining at 700 ℃ for 20min, and cooling to room temperature after the calcination is finished to prepare inorganic composite particles;
(2) dispersing 1 part of the prepared inorganic composite particles in deionized water under the action of 0.0015 part of sodium dodecyl sulfate to prepare a dispersion liquid; mixing 6 parts of acrylic acid, 1 part of acrylamide, 0.15 part of span80 and 8 parts of deionized water, uniformly stirring, adding the prepared dispersion, uniformly mixing, adding 0.01 part of N, N-methylene bisacrylamide and 0.01 part of potassium persulfate, heating to 60 ℃, reacting for 1h, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing 1 part of the prepared composite additive, 7 parts of inorganic fertilizer, 0.5 part of trace element fertilizer, 0.01 part of microbial agent and 10 parts of humic acid to prepare the soil conditioner.
Example 2
A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge through a 200-mesh sieve after treatment to prepare paper-making sludge particles with the water content of 5 wt%; mixing 3 parts of papermaking sludge particles, 2 parts of vermiculite powder, 11 parts of clay and 5 parts of plant ash in parts by weight, adding 10 parts of deionized water, stirring and mixing uniformly, then preparing mixed particles with the particle size of 5mm, placing the mixed particles in a muffle furnace, firstly calcining at 400 ℃ for 10min under the protection of inert gas, then calcining at 800 ℃ for 30min, and cooling to room temperature after the calcination is finished to prepare inorganic composite particles;
(2) dispersing 1 part of the prepared inorganic composite particles in deionized water under the action of 0.02 part of sodium dodecyl sulfate to prepare a dispersion liquid; mixing 12 parts of acrylic acid, 3 parts of acrylamide, 0.35 part of span80 and 15 parts of deionized water, uniformly stirring, adding the prepared dispersion, uniformly mixing, adding 0.05 part of N, N-methylene bisacrylamide and 0.04 part of potassium persulfate, heating to 80 ℃, reacting for 3 hours, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing 5 parts of the prepared composite additive, 15 parts of inorganic fertilizer, 1.5 parts of trace element fertilizer, 0.03 part of microbial agent and 20 parts of humic acid to prepare the soil conditioner.
Example 3
A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge through a 200-mesh sieve after treatment to prepare paper-making sludge particles with the water content of 3.5 wt%; mixing 1.5 parts of papermaking sludge particles, 1 part of vermiculite powder, 8 parts of clay and 3 parts of plant ash in parts by weight, adding 8 parts of deionized water, stirring and mixing uniformly, then preparing mixed particles with the particle size of 3mm, placing the mixed particles in a muffle furnace, firstly calcining at 350 ℃ for 10min under the protection of inert gas, then calcining at 700 ℃ for 20min, and cooling to room temperature after the calcination is finished to prepare inorganic composite particles;
(2) dispersing 1 part of the prepared inorganic composite particles in deionized water under the action of 0.0016 part of sodium dodecyl sulfate to prepare a dispersion liquid; mixing 7 parts of acrylic acid, 1 part of acrylamide, 0.2 part of span80 and 9 parts of deionized water, uniformly stirring, adding the prepared dispersion, uniformly mixing, adding 0.02 part of N, N-methylene bisacrylamide and 0.02 part of potassium persulfate, heating to 60 ℃, reacting for 3 hours, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing 2 parts of the prepared composite additive, 8 parts of inorganic fertilizer, 0.7 part of trace element fertilizer, 0.015 part of microbial agent and 12 parts of humic acid to prepare the soil conditioner.
Example 4
A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge through a 200-mesh sieve after treatment to prepare paper-making sludge particles with the water content of 3.5 wt%; mixing 2 parts of papermaking sludge particles, 2 parts of vermiculite powder, 9 parts of clay and 3.5 parts of plant ash in parts by weight, adding 8.5 parts of deionized water, stirring and mixing uniformly, then preparing mixed particles with the particle size of 3mm, placing the mixed particles in a muffle furnace, firstly calcining at 300 ℃ for 10min under the protection of inert gas, then calcining at 800 ℃ for 20min, and cooling to room temperature after the calcination is finished to prepare inorganic composite particles;
(2) dispersing 1 part of the prepared inorganic composite particles in deionized water under the action of 0.0017 part of sodium dodecyl sulfate to prepare a dispersion liquid; mixing 8 parts of acrylic acid, 2 parts of acrylamide, 0.25 part of span80 and 10 parts of deionized water, uniformly stirring, adding the prepared dispersion, uniformly mixing, adding 0.03 part of N, N-methylene bisacrylamide and 0.02 part of potassium persulfate, heating to 70 ℃, reacting for 1.5 hours, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing the prepared compound additive in parts by weight, 11 parts of inorganic fertilizer, 0.9 part of trace element fertilizer, 0.01 part of microbial agent and 14 parts of humic acid to prepare the soil conditioner.
Example 5
A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge through a 200-mesh sieve after treatment to prepare paper-making sludge particles with the water content of 4 wt%; mixing 2 parts of papermaking sludge particles, 1 part of vermiculite powder, 9 parts of clay and 4 parts of plant ash in parts by weight, adding 9 parts of deionized water, stirring and mixing uniformly, then preparing mixed particles with the particle size of 3mm, placing the mixed particles in a muffle furnace, firstly calcining at 400 ℃ for 10min under the protection of inert gas, then calcining at 700 ℃ for 20min, and cooling to room temperature after the calcination is finished to prepare inorganic composite particles;
(2) dispersing 1 part of the prepared inorganic composite particles in deionized water under the action of 0.0018 part of sodium dodecyl sulfate to prepare a dispersion liquid; mixing 10 parts of acrylic acid, 2 parts of acrylamide, 0.3 part of span80 and 12 parts of deionized water, uniformly stirring, adding the prepared dispersion, uniformly mixing, adding 0.04 part of N, N-methylene bisacrylamide and 0.03 part of potassium persulfate, heating to 65 ℃, reacting for 2 hours, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing 4 parts of the prepared composite additive, 11 parts of inorganic fertilizer, 1.1 parts of trace element fertilizer, 0.02 part of microbial agent and 16 parts of humic acid to prepare the soil conditioner.
Example 6
A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder comprises the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge through a 200-mesh sieve after treatment to prepare paper-making sludge particles with the water content of 4.5 wt%; mixing 2.5 parts of papermaking sludge particles, 2 parts of vermiculite powder, 10 parts of clay and 3 parts of plant ash in parts by weight, adding 9.5 parts of deionized water, stirring and mixing uniformly, then preparing mixed particles with the particle size of 2mm, placing the mixed particles in a muffle furnace, firstly calcining at 400 ℃ for 10min under the protection of inert gas, then calcining at 750 ℃ for 25min, and cooling to room temperature after the calcination is finished to prepare inorganic composite particles;
(2) dispersing 1 part of the prepared inorganic composite particles in deionized water under the action of 0.0019 part of sodium dodecyl sulfate to prepare a dispersion liquid; mixing 11 parts of acrylic acid, 2.5 parts of acrylamide, 0.33 part of span80 and 14 parts of deionized water, uniformly stirring, adding the prepared dispersion, uniformly mixing, adding 0.04 part of N, N-methylene bisacrylamide and 0.035 part of potassium persulfate, heating to 75 ℃, reacting for 2 hours, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and uniformly mixing 4.5 parts of the prepared composite additive, 14 parts of inorganic fertilizer, 1.3 parts of trace element fertilizer, 0.025 part of microbial agent and 18 parts of humic acid to prepare the soil conditioner.
Comparative example
The soil conditioner was supplemented with an equal amount of polyacrylic resin instead of the composite additive under the same conditions as in example 6.
First, the performance test was performed on the composite additive prepared according to the present invention.
1. Water absorption performance
Respectively weighing m1The soil conditioner prepared in examples 1 to 6 and comparative example was used as a sample, and the sample was placed in a predetermined volume of deionized water, saturated with water, and then drained through a 100 mesh sieve to remove excess water, and the mass of the sample was measured and recorded as m2According to Q ═ m2-m1)/m1Calculating the water absorption performance of the sample; in the formula, Q is a composite additiveWater absorption Capacity of the agent, m1The mass of the composite additive before water absorption; m is2Is the mass of the composite additive after water absorption.
2. Water retention property
Placing the sample saturated with water in an oven at 150 deg.C, weighing after 2 hr, and measuring water retention by water retention rate (R ═ m)2'/m1'. 100% Water Retention, wherein R represents Water Retention, m1' is the mass of the composite additive after water absorption and before dehydration; m is2' is the mass of the composite additive after water absorption and dehydration.
The test results are shown in table 1.
TABLE 1
| Water absorption rate | Water retention rate% | |
| Example 1 | 1420 | 73 |
| Example 2 | 1421 | 75 |
| Example 3 | 1419 | 75 |
| Example 4 | 1420 | 76 |
| Example 5 | 1418 | 75 |
| Example 6 | 1420 | 78 |
| Polyacrylic resin water-retaining agent | 783 | 52 |
From the test results shown in table 1, the inorganic composite particles prepared by the present invention can improve the water absorption performance and water retention performance of the composite additive to a certain extent, mainly because the inorganic composite particles prepared by the present invention have a porous structure, a large specific surface area, hydrophilic groups on the surface, and strong water absorption capacity, the water absorption performance of the composite additive is improved.
Select 667hm respectively2The coastal saline-alkali soil is used as a test area, the average altitude of the test area is 3m, the annual average precipitation is 360-960 mm, the pH of the soil of the test area is 8, the total salt content is 7.07g/kg, and HCO3 -Content 0.330g/kg, Cl-The content of SO was 3.19g/kg4 2-The content is 1.22g/kg, K+The content of Na is 0.043g/kg+The content of Ca is 1.83g/kg2+The content of Mg is 0.24g/kg2+0.148g/kg。
Secondly, applying the soil conditioner prepared in the embodiments 1 to 6 and the comparative example into soil in a test area, then soil preparation, planting crops after irrigation, collecting 0-10 cm soil in the randomly selected area of the test area after the crops grow for two cycles, testing, and collecting CO3 2-、HCO3 -The content was determined by double indicator-neutralization titration, Cl－The content adopts AgNO3Determination by titration, SO4 2－The content is determined by EDTA indirect complexation titration, Ca2+、Mg2+The content is determined by EDTA complexation titration, K+、Na+The content was measured using a flame photometer, and the total salt content was the sum of the contents of the respective ions. The pH value was measured by using a pH meter (shanghai sanxin mp521), and the salt rejection rate was (1-salt content of soil after treatment)/salt content of soil before treatment × 100%. The test results are shown in table 2.
TABLE 2
From the test results in table 2, the soil conditioner in the embodiments 1 to 6 of the present invention can effectively reduce the salt content in the soil when used for saline-alkali soil improvement, and compared with the comparative example, the removal rate of the salt content is improved by about one time.
Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A preparation method of a soil conditioner based on paper mill sludge and vermiculite powder is characterized by comprising the following steps:
(1) drying and grinding the paper-making sludge, and sieving the paper-making sludge with a 200-mesh sieve to obtain paper-making sludge particles; mixing the paper making sludge particles with vermiculite powder, clay and plant ash, adding deionized water, stirring and mixing uniformly to obtain mixed particles with the particle size of 2-5 mm, placing the mixed particles in a muffle furnace, and calcining for 30-40 min under the protection of inert gas; cooling to room temperature after calcining to obtain inorganic composite particles;
(2) dispersing the prepared inorganic composite particles in deionized water under the action of sodium dodecyl sulfate to prepare dispersion liquid; mixing and stirring acrylic acid, acrylamide, span80 and deionized water uniformly, adding the prepared dispersion, mixing uniformly, adding N, N-methylene bisacrylamide and potassium persulfate, heating to 60-80 ℃, reacting for 1-3 h, cooling to room temperature after the reaction is finished, filtering, and drying the solid to obtain the composite additive;
(3) and (3) uniformly mixing the prepared composite additive, inorganic fertilizer, trace element fertilizer, microbial agent and humic acid to prepare the soil conditioner.
2. The method for preparing a soil conditioner based on paper mill sludge and vermiculite powder as claimed in claim 1, wherein in step (1), the water content of the paper mill sludge particles is 3 wt% to 5 wt%.
3. The preparation method of the soil conditioner based on the paper-making sludge and the vermiculite powder in the step (1), wherein the paper-making sludge particles, the vermiculite powder, the clay, the plant ash and the deionized water are respectively 1-3 parts by weight of the paper-making sludge particles, 1-2 parts by weight of the vermiculite powder, 7-11 parts by weight of the clay, 3-5 parts by weight of the plant ash and 8-10 parts by weight of the deionized water.
4. The method for preparing a soil conditioner based on paper sludge and vermiculite powder as claimed in claim 1, wherein in step (1), the calcination treatment conditions are as follows: firstly, calcining for 10min at 300-400 ℃; then calcining for 20-30 min at 700-800 ℃.
5. The method for preparing the soil conditioner based on the paper mill sludge and the vermiculite powder as claimed in claim 1, wherein in the step (2), the mass ratio of the inorganic composite particles to the silane coupling agent is 1: (0.0015-0.02).
6. The method for preparing a soil conditioner based on paper mill sludge and vermiculite powder as claimed in claim 1, wherein in step (2), the amounts of acrylic acid, acrylamide, span80, deionized water, inorganic composite particles, N-methylene bisacrylamide and potassium persulfate are as follows: 6-12 parts of acrylic acid, 1-3 parts of acrylamide, 800.15-0.35 part of span, 8-15 parts of deionized water, 0.8-1.2 parts of inorganic composite particles, 0.01-0.05 part of N, N-methylene bisacrylamide and 0.01-0.04 part of potassium persulfate.
7. The preparation method of the soil conditioner based on the paper mill sludge and the vermiculite powder as claimed in claim 1, wherein in the step (3), the dosage of each component is calculated by weight parts as follows: 1-5 parts of compound additive, 7-15 parts of inorganic fertilizer, 0.5-1.5 parts of trace element fertilizer, 0.01-0.03 part of microbial agent and 10-20 parts of humic acid.
8. The method for preparing a soil conditioner based on paper sludge and vermiculite powder as claimed in claim 1, wherein in step (3), the inorganic fertilizer is one or more of ammonium chloride, potassium phosphate, urea, diammonium phosphate and potassium nitrate.
9. The method for preparing a soil conditioner based on paper mill sludge and vermiculite powder as claimed in claim 1, wherein in step (3), the microelement fertilizer is one or more of zinc sulfate heptahydrate, manganese sulfate, copper sulfate and ammonium molybdate.
10. The method for preparing a soil conditioner based on paper mill sludge and vermiculite powder as claimed in claim 1, wherein in step (3), the microbial agent is one or more of azotobacter, phosphate solubilizing bacteria, potassium solubilizing bacteria and halophilic bacteria.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114039037A (en) * | 2021-11-30 | 2022-02-11 | 陕西榆能集团能源化工研究院有限公司 | Nitrogen-oxygen co-doped double-carbon-coated porous silicon-carbon composite material, and preparation method and application thereof |
| CN114181710A (en) * | 2021-12-28 | 2022-03-15 | 中国科学院烟台海岸带研究所 | Saline-alkali soil curing agent and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039037A (en) * | 2021-11-30 | 2022-02-11 | 陕西榆能集团能源化工研究院有限公司 | Nitrogen-oxygen co-doped double-carbon-coated porous silicon-carbon composite material, and preparation method and application thereof |
| CN114181710A (en) * | 2021-12-28 | 2022-03-15 | 中国科学院烟台海岸带研究所 | Saline-alkali soil curing agent and preparation method thereof |
| CN114181710B (en) * | 2021-12-28 | 2024-01-09 | 中国科学院烟台海岸带研究所 | Saline-alkali soil curing agent and preparation method thereof |
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