CN111117643A - Soil Cd and Pb repairing agent and preparation method thereof - Google Patents
Soil Cd and Pb repairing agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a preparation method of a soil Cd and Pb repairing agent, which comprises the following steps: (1) preparing corn straw charcoal powder; (2) hydrothermal treatment of the charcoal powder with mixed aqueous solution of zoysia japonica-rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride; (3) soaking potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine in water solution; (4) soaking in mixed aqueous solution of phosphoric acid and sodium pyrophosphate; (5) soaking in hydrogen peroxide. The soil remediation agent prepared by the method has good stabilization effect on Cd and Pb, the Cd and Pb in the treated soil are obviously converted from an acid soluble state to a residue state, and the heavy metal toxicity of the soil is obviously reduced.
Description
Technical Field
The invention belongs to the technical field of production of petrochemical nitrate, and particularly relates to a method for purifying isooctyl nitrate.
Background
The heavy metal contaminated soil is generally damaged by heavy metals such As Pb, Cd and the like, and the heavy metal contaminated soil is caused by the fact that the pollutants such As As and the like which have the same physicochemical properties with the metals exceed the self-cleaning capacity of the soil. The soil is also contaminated with heavy metals, which causes various environmental problems. The heavy metal content in the soil is increased due to artificial activities, so that the content of the heavy metal is obviously higher than the background value of the soil, and the ecological environment is finally deteriorated. In recent years, with the development of great prosperity brought by innovation and development, the economic construction is accelerated, the progress of enterprise, industrialization and urbanization is accelerated, and the production and the non-control use of a large amount of pesticides, fertilizers and agricultural materials further aggravate the soil pollution, particularly the heavy metal polluted soil. Large-scale mineral products are mined, smelted and the like, so that the land is polluted by heavy metals, the original land restoration capability is damaged, and the land availability is damaged. In the world where agricultural resources are being developed, the soil contaminated with heavy metals is becoming more severe.
Disclosure of Invention
The invention provides a preparation method of a soil Cd and Pb repairing agent, which comprises the following steps:
(1) heating corn straws to 500-550 ℃ in a nitrogen atmosphere, preserving heat, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast stonecrop herb composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, putting the charcoal powder into a dilute hydrochloric acid solution, stirring and soaking for more than 10min, then filtering, washing the charcoal powder with deionized water for 2-3 times, drying, soaking the dried powder into the mixed aqueous solution of the zoysia-southeast stonecrop herb composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, putting the mixture into a closed container, expelling air in the container with nitrogen, sealing the container, heating the mixture to 160-180 ℃, keeping the temperature for 30-50 min, cooling the mixture to normal temperature with air in the container after the heat preservation is finished, opening the container, carrying out solid-liquid separation, and drying in a solid phase;
(3) preparing an aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, keeping the temperature at 50-60 ℃ for 20-24 hours, cooling the mixture to normal temperature after the constant temperature is finished, filtering the mixture, washing the solid phase with deionized water for 2-3 times, and drying the solid phase at 50-60 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, adding the solid phase A into the phosphoric acid and sodium pyrophosphate mixed aqueous solution, stirring the solution, keeping the temperature of the solution constant to 70-80 ℃, keeping the temperature for 3-5 hours, cooling in air, filtering, washing the solid phase with deionized water for 3-5 times, and drying at 50-60 ℃ to obtain a solid phase B;
(5) and soaking the solid phase B in hydrogen peroxide for 10-20 min, filtering, washing the solid phase with deionized water for 2-3 times, and drying at 50-60 ℃ to obtain the soil Cd and Pb repairing agent.
Further, in the step (1), the heat preservation time at 500-550 ℃ is 2-3 h, and the number of the sieving meshes is 40.
Further, the preparation method of the zoysia-southeast rhodiola rosea compound extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and sedum alfredii hance leaves according to the proportion of sedum alfredii hance leaves =10: 3-6 to obtain a mixed material;
2) and (3) soaking the mixed material in absolute ethyl alcohol for 30-60 min, keeping the absolute ethyl alcohol at a constant temperature of 70-80 ℃ in the soaking process, carrying out ultrasonic oscillation, filtering to remove solid phase residues after soaking is finished, cooling a liquid phase to normal temperature in air, and concentrating under reduced pressure to obtain the zoysia-sedum alfredii composite extract.
Further, the mass ratio of the mixed material to the absolute ethyl alcohol is that the mixed material/the absolute ethyl alcohol is =1: 6-10; concentrating under reduced pressure to 1/4-1/3 of the volume before concentration.
Further, the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea compound extract, dioctyl sodium sulfosuccinate and magnesium chloride is as follows: 100-200 mL/L of zoysia-sedum alfredii composite extract, 6-10 g/300mL of dioctyl sodium sulfosuccinate, 2-8 g/300mL of magnesium chloride and the balance of water; the mass percentage of the hydrogen chloride in the dilute hydrochloric acid solution is 5 percent, and the balance is water; the mass of the dilute hydrochloric acid solution is more than 8 times of the mass of the charcoal powder soaked in the dilute hydrochloric acid solution; the mass of the mixed aqueous solution of the zoysia japonica-sedum alfredii composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is more than 8 times of that of the charcoal powder soaked in the mixed aqueous solution.
Further, the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine comprises the following components in percentage by mass: 4 to 7 percent of potassium glutamate, 1 to 3 percent of citric acid, 0.5 to 0.8 percent of trimethylpyruvic acid, 0.5 to 0.8 percent of phenethylamine and the balance of water; the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenethylamine is more than 8 times of the mass of the solid phase added into the aqueous solution.
Further, the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed water solution is as follows: 10-30 g/L of phosphoric acid, 3-7 g/L of sodium pyrophosphate and the balance of water; the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is more than 8 times of that of the solid phase A soaked in the mixed aqueous solution.
Further, the mass percentage of the solute in the hydrogen peroxide is 5%, and the mass of the hydrogen peroxide is more than 8 times of that of the solid phase B soaked in the hydrogen peroxide.
Therefore, the beneficial effects of the invention are as follows: the soil remediation agent prepared by the method has good stabilization effect on Cd and Pb, the Cd and Pb in the treated soil are obviously converted from an acid soluble state to a residue state, and the heavy metal toxicity of the soil is obviously reduced.
Drawings
FIG. 1 is a graph comparing the Cd and Pb stabilizing efficiency of the repairing agent prepared in each example and comparative example after the repairing agent is used for treating heavy metal contaminated soil.
Detailed Description
The following is a detailed description with reference to examples:
example 1
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is as follows: 100mL/L of zoysia-southeast rhodiola rosea composite extract, 6g/300mL of dioctyl sodium sulfosuccinate, 2 g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in a mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride in the mixture is 8 times that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 30min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 4% of potassium glutamate, 1% of citric acid, 0.5% of trimethylpyruvic acid, 0.5% of phenylethylamine and the balance of water; adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the solid phase added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the solid phase to the normal temperature after the constant temperature is finished, filtering, washing the solid phase with deionized water for 3 times, and drying the solid phase at the temperature of 55 +/-5 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 10g/L of phosphoric acid, 3g/L of sodium pyrophosphate and the balance of water; and adding the solid phase A into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase A soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 3 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase B;
(5) soaking the solid phase B in hydrogen peroxide with solute content of 5% for 10min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase B soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the embodiment.
The preparation method of the zoysia-sedum alfredii compound extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and the sedum alfredii hance according to the proportion of sedum alfredii hance =10:3 to obtain a mixed material;
2) mixing the mixed material and absolute ethyl alcohol according to the mass ratio of the mixed material/absolute ethyl alcohol =1:6, wherein the soaking time of the mixed material is 30min, the absolute ethyl alcohol is kept at a constant temperature of 75 +/-5 ℃ in the soaking process, ultrasonic oscillation is carried out, solid-phase slag is removed by filtration after the soaking is finished, the liquid phase is cooled to the normal temperature by air, and the liquid phase is concentrated to 1/4 of the volume before the concentration under reduced pressure, so that the zoysia-southeast rhodiola rosea composite extract is obtained.
Example 2
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is as follows: 130mL/L of zoysia-southeast rhodiola rosea composite extract, 8g/300mL of dioctyl sodium sulfosuccinate, 4 g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in a mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride in the mixture is 8 times that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 40min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 5% of potassium glutamate, 2% of citric acid, 0.6% of trimethylpyruvic acid, 0.6% of phenylethylamine and the balance of water; adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the solid phase added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the solid phase to the normal temperature after the constant temperature is finished, filtering, washing the solid phase with deionized water for 3 times, and drying the solid phase at the temperature of 55 +/-5 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 18g/L of phosphoric acid, 4g/L of sodium pyrophosphate and the balance of water; and adding the solid phase A into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase A soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 4 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase B;
(5) soaking the solid phase B in hydrogen peroxide with solute content of 5% for 10min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase B soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the embodiment.
The preparation method of the zoysia-sedum alfredii compound extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and the sedum alfredii hance according to the proportion of sedum alfredii hance =10:4 to obtain a mixed material;
2) mixing the mixed material and absolute ethyl alcohol according to the mass ratio of the mixed material/absolute ethyl alcohol =1:7, wherein the soaking time of the mixed material is 40min, the absolute ethyl alcohol is kept at a constant temperature of 75 +/-5 ℃ in the soaking process, ultrasonic oscillation is carried out, solid-phase slag is removed by filtration after the soaking is finished, the liquid phase is cooled to the normal temperature by air, and the liquid phase is concentrated to 1/4 of the volume before the concentration under reduced pressure, so that the zoysia-southeast rhodiola rosea composite extract is obtained.
Example 3
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is as follows: 180mL/L of zoysia-southeast rhodiola rosea composite extract, 9g/300mL of dioctyl sodium sulfosuccinate, 7 g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in a mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride in the mixture is 8 times that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 40min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 6% of potassium glutamate, 2% of citric acid, 0.7% of trimethylpyruvic acid, 0.6% of phenylethylamine and the balance of water; adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the solid phase added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the solid phase to the normal temperature after the constant temperature is finished, filtering, washing the solid phase with deionized water for 3 times, and drying the solid phase at the temperature of 55 +/-5 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 20g/L of phosphoric acid, 6g/L of sodium pyrophosphate and the balance of water; and adding the solid phase A into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase A soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 4 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase B;
(5) soaking the solid phase B in hydrogen peroxide with solute content of 5% for 20min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase B soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the embodiment.
The preparation method of the zoysia-sedum alfredii compound extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and the sedum alfredii hance according to the proportion of sedum alfredii hance =10:5 to obtain a mixed material;
2) mixing the mixed material and absolute ethyl alcohol according to the mass ratio of the mixed material/absolute ethyl alcohol =1:9, wherein the soaking time of the mixed material is 50min, the absolute ethyl alcohol is kept at a constant temperature of 75 +/-5 ℃ in the soaking process, ultrasonic oscillation is carried out, solid-phase slag is removed by filtration after the soaking is finished, the liquid phase is cooled to the normal temperature by air, and the liquid phase is concentrated to 1/4 of the volume before the concentration under reduced pressure, so that the zoysia-southeast rhodiola rosea composite extract is obtained.
Example 4
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is as follows: 200mL/L of zoysia-southeast stonecrop composite extract, 10g/300mL of dioctyl sodium sulfosuccinate, 8g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in a mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride in the mixture is 8 times that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 50min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 7% of potassium glutamate, 3% of citric acid, 0.8% of trimethylpyruvic acid, 0.8% of phenylethylamine and the balance of water; adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the solid phase added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the solid phase to the normal temperature after the constant temperature is finished, filtering, washing the solid phase with deionized water for 3 times, and drying the solid phase at the temperature of 55 +/-5 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 30g/L of phosphoric acid, 7g/L of sodium pyrophosphate and the balance of water; and adding the solid phase A into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase A soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 5 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase B;
(5) soaking the solid phase B in hydrogen peroxide with solute content of 5% for 20min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase B soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the embodiment.
The preparation method of the zoysia-sedum alfredii compound extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and the sedum alfredii according to the proportion of sedum alfredii leaves =10:6 to obtain a mixed material;
2) mixing the mixed material and absolute ethyl alcohol according to the mass ratio of the mixed material/absolute ethyl alcohol =1:10, wherein the soaking time of the mixed material is 60min, the absolute ethyl alcohol is kept at a constant temperature of 75 +/-5 ℃ in the soaking process, ultrasonic oscillation is carried out, solid-phase slag is removed by filtration after the soaking is finished, the liquid phase is cooled to the normal temperature by air, and the liquid phase is concentrated to 1/4 of the volume before the concentration under reduced pressure, so that the zoysia-southeast rhodiola rosea composite extract is obtained.
Comparative example 1
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of dioctyl sodium sulfosuccinate and magnesium chloride is as follows: 8g/300mL of dioctyl sodium sulfosuccinate, 4 g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in the mixed aqueous solution of dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of dioctyl sodium sulfosuccinate and magnesium chloride in the mixture is 8 times of that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 40min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 5% of potassium glutamate, 2% of citric acid, 0.6% of trimethylpyruvic acid, 0.6% of phenylethylamine and the balance of water; adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the solid phase added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the solid phase to the normal temperature after the constant temperature is finished, filtering, washing the solid phase with deionized water for 3 times, and drying the solid phase at the temperature of 55 +/-5 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 18g/L of phosphoric acid, 4g/L of sodium pyrophosphate and the balance of water; and adding the solid phase A into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase A soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 4 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase B;
(5) and soaking the solid phase B in hydrogen peroxide with solute content of 5% for 10min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase B soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase for 3 times by using deionized water, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the comparative example.
Comparative example 2
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 5% of potassium glutamate, 2% of citric acid, 0.6% of trimethylpyruvic acid, 0.6% of phenylethylamine and the balance of water; adding the charcoal powder into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the charcoal powder added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the charcoal powder to the normal temperature after the constant temperature is finished, filtering, washing the solid phase for 3 times by using deionized water, and drying the charcoal powder at 55 +/-5 ℃ to obtain a solid phase A;
(3) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 18g/L of phosphoric acid, 4g/L of sodium pyrophosphate and the balance of water; and adding the solid phase A into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase A soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 4 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase B;
(4) and soaking the solid phase B in hydrogen peroxide with solute content of 5% for 10min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase B soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase for 3 times by using deionized water, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the comparative example.
Comparative example 3
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is as follows: 130mL/L of zoysia-southeast rhodiola rosea composite extract, 8g/300mL of dioctyl sodium sulfosuccinate, 4 g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in a mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride in the mixture is 8 times that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 40min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, wherein the concentration of each component in the phosphoric acid and sodium pyrophosphate mixed aqueous solution is as follows: 18g/L of phosphoric acid, 4g/L of sodium pyrophosphate and the balance of water; and adding the dried solid phase into the mixed aqueous solution of phosphoric acid and sodium pyrophosphate, wherein the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is 8 times of that of the solid phase soaked in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate. Stirring the solution, keeping the temperature of the solution constant to 75 +/-5 ℃ for 4 hours, cooling in air, filtering, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain a solid phase C;
(4) soaking the solid phase C in hydrogen peroxide with solute content of 5% for 10min, wherein the mass of the hydrogen peroxide is 8 times that of the solid phase C soaked in the hydrogen peroxide, filtering after soaking, washing the solid phase with deionized water for 3 times, and drying at 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the comparative example.
The preparation method of the zoysia-southeast rhodiola rosea composite extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and the sedum alfredii hance according to the proportion of sedum alfredii hance =10:4 to obtain a mixed material;
2) mixing the mixed material and absolute ethyl alcohol according to the mass ratio of the mixed material/absolute ethyl alcohol =1:7, wherein the soaking time of the mixed material is 40min, the absolute ethyl alcohol is kept at a constant temperature of 75 +/-5 ℃ in the soaking process, ultrasonic oscillation is carried out, solid-phase slag is removed by filtration after the soaking is finished, the liquid phase is cooled to the normal temperature by air, and the liquid phase is concentrated to 1/4 of the volume before the concentration under reduced pressure, so that the zoysia-southeast rhodiola rosea composite extract is obtained.
Comparative example 4
A preparation method of a soil Cd and Pb repairing agent comprises the following steps:
(1) heating corn straws to 520 +/-10 ℃ in a nitrogen atmosphere, preserving heat for 3 hours, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving by a 40-mesh sieve to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, wherein the concentration of each component in the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is as follows: 130mL/L of zoysia-southeast rhodiola rosea composite extract, 8g/300mL of dioctyl sodium sulfosuccinate, 4 g/300mL of magnesium chloride and the balance of water. And (3) placing the charcoal powder into a dilute hydrochloric acid solution with solute mass fraction of 5%, stirring and soaking for 10min, wherein the mass of the dilute hydrochloric acid solution is 8 times that of the charcoal powder soaked in the dilute hydrochloric acid solution. Filtering after soaking, washing the biological carbon powder for 3 times by using deionized water, drying, soaking the dried powder in a mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, wherein the mass of the mixed aqueous solution of the zoysia-southeast rhodiola rosea composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride in the mixture is 8 times that of the biological carbon powder; placing the mixture in a closed container, removing air in the container with nitrogen gas, sealing the container, heating the mixture to 170 + -10 deg.C, keeping the temperature for 40min, air cooling the mixture to room temperature, opening the container, separating solid and liquid, and drying solid phase;
(3) preparing aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the aqueous solution of the potassium glutamate, the citric acid, the trimethylpyruvic acid and the phenylethylamine comprises the following components in percentage by mass: 5% of potassium glutamate, 2% of citric acid, 0.6% of trimethylpyruvic acid, 0.6% of phenylethylamine and the balance of water; and adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, wherein the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine is 8 times that of the solid phase added into the aqueous solution, keeping the temperature at 55 +/-5 ℃ for 20 hours, cooling the aqueous solution to the normal temperature after the constant temperature is finished, filtering, washing the solid phase with deionized water for 3 times, and drying the solid phase at the temperature of 55 +/-5 ℃ to obtain the soil Cd and Pb repairing agent of the comparative example.
The preparation method of the zoysia-southeast rhodiola rosea composite extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and the sedum alfredii hance according to the proportion of sedum alfredii hance =10:4 to obtain a mixed material;
2) mixing the mixed material and absolute ethyl alcohol according to the mass ratio of the mixed material/absolute ethyl alcohol =1:7, wherein the soaking time of the mixed material is 40min, the absolute ethyl alcohol is kept at a constant temperature of 75 +/-5 ℃ in the soaking process, ultrasonic oscillation is carried out, solid-phase slag is removed by filtration after the soaking is finished, the liquid phase is cooled to the normal temperature by air, and the liquid phase is concentrated to 1/4 of the volume before the concentration under reduced pressure, so that the zoysia-southeast rhodiola rosea composite extract is obtained.
Example 5
The soil remediation effects of the remediation agents prepared in examples 1 to 4 and comparative examples 1 to 4 were respectively tested. And (3) taking heavy metal contaminated soil, and testing that the total content of Cd in the untreated soil is 3.04mg/kg and the total content of Pb in the untreated soil is 1265 mg/kg. The repairing effect testing method comprises the following steps:
weighing 500g of heavy metal contaminated soil, adding a repairing agent into the soil according to the amount of 8% of the soil mass, adding deionized water into the soil to keep the soil water content between 30% and 35%, stirring the soil for 10min, uniformly mixing, standing at room temperature for 30 days, and periodically adding deionized water in the standing process to ensure that the soil water content is between 30% and 35%;
and step two, after standing, air-drying and grinding the soil, obtaining leachate according to a sulfuric acid-nitric acid method in the standard HJ/T299-2007, measuring the leaching concentration of Cd and Pb heavy metals in the leachate by using a flame atomic absorption spectrophotometry, and calculating the stability efficiency. Stable efficiencyη=(C 0 -C 1 )/C 0 X is 100%; whereinC 0 The leaching concentration of the heavy metal in the untreated soil,C 1 the leaching concentration of the heavy metal in the soil treated by the repairing agent is shown.
Examples and comparative examplesThe prepared repairing agent has the stable efficiency on Cd and Pb in soilηAs shown in fig. 1. Generally, the higher the stabilization efficiency of heavy metals in soil, the better the stabilization effect of heavy metals, and the lower the migration ability, the less harmful to the ecosystem. The soil remediation agent prepared by the method has good stabilization effect on Cd and Pb, the Cd and Pb in the treated soil are obviously converted from an acid soluble state to a residue state, and the heavy metal toxicity of the soil is obviously reduced. Comparing example 2 with comparative example 1, it can be seen that the zoysia-southeast rhodiola rosea composite extract in the preparation process of the soil remediation agent has significant influence, and the remediation effect of the remediation agent prepared by omitting the zoysia-southeast rhodiola rosea composite extract in the process is seriously deteriorated, so that the remediation requirement is difficult to meet. Comparing the comparative example 1 and the comparative example 2, it can be seen that the treatment process of dioctyl sodium sulfosuccinate and magnesium chloride is continuously omitted on the basis of omitting the preparation process of adding the zoysia-southeast rhodiola rosea composite extract, the influence on the Pb stabilization effect in soil is small, the Cd stabilization effect is mainly seriously deteriorated, and the treatment of the dioctyl sodium sulfosuccinate and the magnesium chloride is beneficial to improving the stability of the product repairing agent to Cd. As can be seen from the comparison of example 2 with comparative example 3 and comparative example 4, the omission of steps (3) to (5) from the method for preparing the repairing agent of the present invention has a certain deterioration in the stabilizing effect of the repairing agent Cd and Pb.
The technical solutions provided by the present invention are described in detail above, and for those skilled in the art, the ideas according to the embodiments of the present invention may be changed in the specific implementation manners and the application ranges, and in summary, the content of the present description should not be construed as limiting the present invention.
Claims (8)
1. A preparation method of a soil Cd and Pb repairing agent is characterized by comprising the following steps:
(1) heating corn straws to 500-550 ℃ in a nitrogen atmosphere, preserving heat, cooling to normal temperature under the protection of nitrogen after heat preservation is finished to obtain biochar, grinding the biochar, and sieving to obtain charcoal powder;
(2) preparing a mixed aqueous solution of a zoysia-southeast stonecrop herb composite extract, dioctyl sodium sulfosuccinate and magnesium chloride, putting the charcoal powder into a dilute hydrochloric acid solution, stirring and soaking for more than 10min, then filtering, washing the charcoal powder with deionized water for 2-3 times, drying, soaking the dried powder into the mixed aqueous solution of the zoysia-southeast stonecrop herb composite extract, dioctyl sodium sulfosuccinate and magnesium chloride to form a mixture, putting the mixture into a closed container, expelling air in the container with nitrogen, sealing the container, heating the mixture to 160-180 ℃, keeping the temperature for 30-50 min, cooling the mixture to normal temperature with air in the container after the heat preservation is finished, opening the container, carrying out solid-liquid separation, and drying in a solid phase;
(3) preparing an aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, adding the dried solid phase into the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine, keeping the temperature at 50-60 ℃ for 20-24 hours, cooling the mixture to normal temperature after the constant temperature is finished, filtering the mixture, washing the solid phase with deionized water for 2-3 times, and drying the solid phase at 50-60 ℃ to obtain a solid phase A;
(4) preparing a phosphoric acid and sodium pyrophosphate mixed aqueous solution, adding the solid phase A into the phosphoric acid and sodium pyrophosphate mixed aqueous solution, stirring the solution, keeping the temperature of the solution constant to 70-80 ℃, keeping the temperature for 3-5 hours, cooling in air, filtering, washing the solid phase with deionized water for 3-5 times, and drying at 50-60 ℃ to obtain a solid phase B;
(5) and soaking the solid phase B in hydrogen peroxide for 10-20 min, filtering, washing the solid phase with deionized water for 2-3 times, and drying at 50-60 ℃ to obtain the soil Cd and Pb repairing agent.
2. The preparation method of the soil Cd and Pb repairing agent according to claim 1, wherein in the step (1), the heat preservation time is 2-3 h at 500-550 ℃, and the mesh number of the sieving screen is 40 meshes.
3. The method for preparing a soil Cd and Pb repairing agent according to claim 1, wherein the method for preparing the zoysia-rhodiola-south China herba composite extract comprises the following steps:
1) washing the whole plant of zoysia japonica, removing roots, and then mixing the zoysia japonica: mixing and chopping zoysia japonica and sedum alfredii hance leaves according to the proportion of sedum alfredii hance leaves =10: 3-6 to obtain a mixed material;
2) and (3) soaking the mixed material in absolute ethyl alcohol for 30-60 min, keeping the absolute ethyl alcohol at a constant temperature of 70-80 ℃ in the soaking process, carrying out ultrasonic oscillation, filtering to remove solid phase residues after soaking is finished, cooling a liquid phase to normal temperature in air, and concentrating under reduced pressure to obtain the zoysia-sedum alfredii composite extract.
4. The preparation method of the soil Cd and Pb repairing agent according to claim 3, wherein the mass ratio of the mixed material to the absolute ethyl alcohol is mixed material/absolute ethyl alcohol =1: 6-10; concentrating under reduced pressure to 1/4-1/3 of the volume before concentration.
5. The method for preparing a Cd and Pb remediation agent for soil according to claim 1, wherein the mixed aqueous solution of the zoysia japonica-sedum alfredii hance composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride has the following concentration: 100-200 mL/L of zoysia-sedum alfredii composite extract, 6-10 g/300mL of dioctyl sodium sulfosuccinate, 2-8 g/300mL of magnesium chloride and the balance of water; the mass percentage of the hydrogen chloride in the dilute hydrochloric acid solution is 5 percent, and the balance is water; the mass of the dilute hydrochloric acid solution is more than 8 times of the mass of the charcoal powder soaked in the dilute hydrochloric acid solution; the mass of the mixed aqueous solution of the zoysia japonica-sedum alfredii composite extract, the dioctyl sodium sulfosuccinate and the magnesium chloride is more than 8 times of that of the charcoal powder soaked in the mixed aqueous solution.
6. The preparation method of the soil Cd and Pb repairing agent according to claim 1, wherein the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenylethylamine comprises the following components in percentage by mass: 4 to 7 percent of potassium glutamate, 1 to 3 percent of citric acid, 0.5 to 0.8 percent of trimethylpyruvic acid, 0.5 to 0.8 percent of phenethylamine and the balance of water; the mass of the aqueous solution of potassium glutamate, citric acid, trimethylpyruvic acid and phenethylamine is more than 8 times of the mass of the solid phase added into the aqueous solution.
7. The preparation method of the soil Cd and Pb repairing agent according to claim 1, wherein the concentration of each component in the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is as follows: 10-30 g/L of phosphoric acid, 3-7 g/L of sodium pyrophosphate and the balance of water; the mass of the mixed aqueous solution of phosphoric acid and sodium pyrophosphate is more than 8 times of that of the solid phase A soaked in the mixed aqueous solution.
8. The preparation method of the soil Cd and Pb repairing agent according to claim 1, wherein the mass percentage of the solute in the hydrogen peroxide is 5%, and the mass of the hydrogen peroxide is more than 8 times of the mass of the solid phase B soaked in the hydrogen peroxide.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163163A (en) * | 2021-12-22 | 2022-03-11 | 株洲宏信科技发展有限公司 | Concrete chromium reducing agent |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523769A (en) * | 2013-10-08 | 2014-01-22 | 中国农业大学 | Composite charcoal, and preparation method and application thereof |
| CN104258809A (en) * | 2014-09-15 | 2015-01-07 | 河南农业大学 | Modified biomass charcoal and remediation method of heavy metal contaminated soil |
| CN105597676A (en) * | 2015-12-31 | 2016-05-25 | 环境保护部华南环境科学研究所 | Preparation method of metal matrix biochar and application thereof in heavy metal passivation |
| CN105670635A (en) * | 2016-03-08 | 2016-06-15 | 华南师范大学 | Preparation method of nano Ni/Fe-biochar composite material and application of nano Ni/Fe-biochar composite material in in-situ restoration of polybrominated diphenyl ether polluted soil |
| CN107213870A (en) * | 2017-07-11 | 2017-09-29 | 北京市农林科学院 | One kind carries magnesium charcoal and its preparation method and application |
| CN110003912A (en) * | 2019-04-18 | 2019-07-12 | 江西师范大学 | A kind of method of modifying of charcoal and its application in soil remediation |
| CN110559998A (en) * | 2019-10-18 | 2019-12-13 | 清华大学 | Loaded biochar functional material for adsorbing heavy metal ions as well as preparation and application thereof |
-
2020
- 2020-01-09 CN CN202010020491.1A patent/CN111117643A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523769A (en) * | 2013-10-08 | 2014-01-22 | 中国农业大学 | Composite charcoal, and preparation method and application thereof |
| CN104258809A (en) * | 2014-09-15 | 2015-01-07 | 河南农业大学 | Modified biomass charcoal and remediation method of heavy metal contaminated soil |
| CN105597676A (en) * | 2015-12-31 | 2016-05-25 | 环境保护部华南环境科学研究所 | Preparation method of metal matrix biochar and application thereof in heavy metal passivation |
| CN105670635A (en) * | 2016-03-08 | 2016-06-15 | 华南师范大学 | Preparation method of nano Ni/Fe-biochar composite material and application of nano Ni/Fe-biochar composite material in in-situ restoration of polybrominated diphenyl ether polluted soil |
| CN107213870A (en) * | 2017-07-11 | 2017-09-29 | 北京市农林科学院 | One kind carries magnesium charcoal and its preparation method and application |
| CN110003912A (en) * | 2019-04-18 | 2019-07-12 | 江西师范大学 | A kind of method of modifying of charcoal and its application in soil remediation |
| CN110559998A (en) * | 2019-10-18 | 2019-12-13 | 清华大学 | Loaded biochar functional material for adsorbing heavy metal ions as well as preparation and application thereof |
Non-Patent Citations (5)
| Title |
|---|
| 中国材料研究学会等: "《国战略性新兴产业 新材料 环境工程材料》", 30 November 2018, 中国铁道出版社 * |
| 宋立杰等: "《农用地污染土壤修复技》", 31 January 2019, 冶金工业出版社 * |
| 王敬国: "《生物地球化学 物质循环与土壤过程》", 31 March 2017, 中国农业大学出版社 * |
| 边照阳: "《烟草农药残留分析技术》", 31 January 2015, 中国轻工业出版社 * |
| 陈功等: "《草地质量监控》", 31 August 2018, 云南大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163163A (en) * | 2021-12-22 | 2022-03-11 | 株洲宏信科技发展有限公司 | Concrete chromium reducing agent |
| CN114163163B (en) * | 2021-12-22 | 2022-11-29 | 湖南润攸科技发展有限公司 | Concrete chromium reducing agent |
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