CN111848266A - Contaminated soil treatment improver and preparation method thereof - Google Patents
Contaminated soil treatment improver and preparation method thereof Download PDFInfo
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- CN111848266A CN111848266A CN202010517509.9A CN202010517509A CN111848266A CN 111848266 A CN111848266 A CN 111848266A CN 202010517509 A CN202010517509 A CN 202010517509A CN 111848266 A CN111848266 A CN 111848266A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/50—Surfactants; Emulsifiers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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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
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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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)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Plant Pathology (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a contaminated soil treatment modifier and a preparation method thereof, wherein the contaminated soil treatment modifier comprises 33-45g of quicklime, 5-9g of biochar, 15-22g of monopotassium phosphate, 18-25g of ground phosphate rock, 15-20g of modified humic acid, 3-8g of a dispersing agent, 2-6g of a wetting agent, 7-10g of sodium iron ethylenediamine tetraacetate, 3-6g of urea, 6-12g of a high-molecular water-retaining agent and 0-20ml of biological bacterial fertilizer; the humic acid ammoniated by the ammonium bicarbonate and the biological bacterial fertilizer are used together, so that the soil base ions can be reduced, and nutrients can be provided for the growth of crops.
Description
Technical Field
The invention relates to the technical field of preparation of soil conditioners, in particular to a contaminated soil treatment conditioner and a preparation method thereof.
Background
At present, with the development of national economy and industrial technology, heavy metal pollutants in waste water and waste residues of industrial and mining enterprises, petroleum and pesticides continuously enter the soil environment, and part of cultivated land is polluted by the heavy metal. Heavy metals in the soil are nondegradable in a natural state and can be continuously accumulated in the soil, so that the harm is more and more serious, and the treatment of the heavy metal polluted soil is more difficult; in addition, heavy metals in the soil can enter underground water through water circulation and enter human bodies through drinking water, and the human health is seriously harmed. Therefore, the work of repairing the heavy metal contaminated soil is urgent.
The heavy metal contaminated soil remediation technology comprises a physical and chemical remediation technology and a biological remediation technology which mainly adopt methods of soil dressing, leaching, electrochemical remediation, chemical fixation and the like. The soil-handling method has large project amount and high cost, only the polluted soil is moved away from the polluted area and is changed into the soil which is moved away from other places for cleaning or improving the soil, and the pollutants are not treated substantially; the leaching remediation method has high cost and great environmental risk, and is increasingly important for the problem of secondary pollution caused by soil, and the remediated soil still needs to be further treated or improved so as to be used in agriculture; the solidification and stabilization technique is to use physical or chemical methods to fix or transform soil pollutants into chemically inactive forms, prevent the soil pollutants from migrating and diffusing in the environment, thereby reducing the toxic degree of the soil, has the characteristics of moderate cost, good effect, short period and the like, has become one of the best methods for treating the heavy metal polluted soil internationally at present, generally adds a soil conditioner to change the physical and chemical properties of the soil, changes the existing state of heavy metals in soil through the adsorption, precipitation or coprecipitation action of the heavy metals, thereby reducing the biological effectiveness and the mobility of the modifier, but the prior modifier has strict requirements on the source of the raw material and the raw material is not easy to obtain, although the soil conditioner has a certain repairing and improving effect on soil, other methods are required to be used for assisting in improving the fertility of the repaired soil, and the soil conditioner is single in function.
Disclosure of Invention
The invention aims to provide a contaminated soil treatment improver and a preparation method thereof, which are used for solving the problems in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that: a contaminated soil treatment modifier comprises 33-45g of quicklime, 5-9g of biochar, 15-22g of monopotassium phosphate, 18-25g of ground phosphate rock, 15-20g of modified humic acid, 3-8g of a dispersing agent, 2-6g of a wetting agent, 7-10g of sodium iron ethylene diamine tetraacetate, 3-6g of urea, 6-12g of a high-molecular water-retaining agent and 0-20ml of biological bacterial fertilizer.
As further optimization, the contaminated soil treatment modifier comprises 35-40g of quicklime, 6-8g of biochar, 16-20g of monopotassium phosphate, 20-24g of ground phosphate rock, 16-18g of modified humic acid, 5-8g of a dispersing agent, 2-6g of a wetting agent, 7-10g of sodium iron ethylene diamine tetraacetate, 3-6g of urea, 6-12g of a polymer water-retaining agent and 3-15ml of a biological bacterial fertilizer.
The biochar is further optimized to be one or more of corn stalk carbon, peanut shell carbon, corncob carbon, rice stalk carbon and bean stalk carbon.
The modified humic acid is a lignite-based humic acid and ammoniated humic acid compound, and the weight ratio of the lignite-based humic acid to the ammoniated humic acid is (2-3): 1.
As a further optimization, the lignite-based humic acid is demineralized lignite-based modified humic acid, and the ammoniated humic acid is ammonium bicarbonate ammoniated modified humic acid.
As a further optimization, the wetting agent is any one or more of phosphate, ethanol and span.
As further optimization, the dispersing agent is one or more of hydrolyzed polymaleic anhydride, sodium tripolyphosphate, sodium dodecyl sulfate and methyl metallocene alcohol.
As a further optimization, the biological bacterial fertilizer is a compound of bacillus licheniformis and pseudomonas hit-east, and the volume ratio of the bacillus licheniformis to the pseudomonas hit-east is (2-2.4): 1.
As a further optimization, the effective viable bacteria concentration of the bacillus licheniformis is 2 multiplied by 106-8×107CFU/mL; the effective viable bacteria concentration of the pseudomonas pseudodontophilus is 5 multiplied by 105-8×107CFU/mL。
The invention also provides a preparation method of the contaminated soil treatment improver, which comprises the following steps,
s1) crushing quicklime and ground phosphate rock, sieving with a 120-mesh sieve, and crushing biochar to 5-15 mm;
s2), adding monopotassium phosphate, modified humic acid, a dispersing agent, a wetting agent, ethylene diamine tetraacetic acid sodium iron and urea, stirring and mixing uniformly, and standing;
s3), adding the macromolecular water-retaining agent and the biological bacterial fertilizer, stirring and mixing uniformly, standing, drying and crushing to obtain the contaminated soil treatment modifier.
Compared with the prior art, the invention has the beneficial effects that:
1. by adding the biochar, particularly the rice straw carbon and the bean straw carbon, the concentration of Cd, Pb and Zn can be greatly reduced, and the soil environment is improved;
2. through decarbonized lignite-based modified humic acid, heavy metals Cd and Pb in soil are immobilized, the radial migration effect of the heavy metals Cd and Pb is reduced, and the heavy metals are combined and are most difficult to release to the environment; humic acid ammoniated by ammonium bicarbonate can provide nutrients for the growth of crops while reducing the salt-based ions of soil, and can realize the simultaneous improvement of nutrition and improvement to achieve the final improvement effect;
3. by adding the biological bacterial fertilizer and under the action of the bacillus licheniformis and the pseudomonas Zhaodonta, the plant can be induced to generate resistance and promote the growth of the plant, and meanwhile, the biological bacterial fertilizer has the functions of disease prevention and bacteriostasis, can protect the rhizosphere environment of the plant, has strong saline-alkali resistance, and can convert and decompose some slightly soluble inorganic substances into organic substances, thereby providing nutrients for the plant.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Example 1
A contaminated soil treatment modifier comprises 34g of quicklime, 9g of corn stalk carbon, 21.5g of monopotassium phosphate, 18g of ground phosphate rock, 10g of demineralized lignite-based modified humic acid, 5g of ammoniated humic acid, 5.5g of sodium tripolyphosphate, 4g of phosphate, 7g of ethylene diamine tetraacetic acid iron sodium, 6g of urea and 10g of a high-molecular water-retaining agent.
The preparation method comprises the following steps: s1) crushing quicklime and ground phosphate rock, sieving with a 120-mesh sieve, and crushing corn straws to 5-15mm in charcoal; s2) adding monopotassium phosphate, demineralized lignite-based modified humic acid, ammoniated humic acid, sodium tripolyphosphate, phosphate, ethylene diamine tetraacetic acid sodium iron and urea, stirring and mixing uniformly, and then standing; s3), adding a macromolecular water-retaining agent, stirring and mixing uniformly, standing, drying and crushing to obtain the contaminated soil treatment modifier.
Example 2
A contaminated soil treatment modifier comprises 45g of quicklime, 5g of bean stalk carbon, 18g of monopotassium phosphate, 22.5g of ground phosphate rock, 15g of demineralized lignite-based modified humic acid, 5g of ammoniated humic acid, 3.5g of hydrolyzed polymaleic anhydride, 6g of ethanol, 8.5g of sodium iron ethylenediamine tetraacetate, 3.5g of urea and 10.5g of a polymer water-retaining agent.
The preparation method comprises the following steps: s1) crushing quicklime and ground phosphate rock, sieving with a 120-mesh sieve, and crushing bean stalks into 5-15 mm; s2), adding monopotassium phosphate, demineralized lignite-based modified humic acid, ammoniated humic acid, hydrolyzed polymaleic anhydride, ethanol, ethylene diamine tetraacetic acid sodium iron and urea, stirring and mixing uniformly, and standing; s3), adding a macromolecular water-retaining agent, stirring and mixing uniformly, standing, drying and crushing to obtain the contaminated soil treatment modifier.
Example 3
A contaminated soil treatment modifier comprises 37.5g of quicklime, 7g of rice straw carbon, 18.5g of monopotassium phosphate, 22g of ground phosphate rock, 11g of demineralized lignite-based modified humic acid, 5g of ammoniated humic acid, 6g of sodium tripolyphosphate, 3.5g of phosphate, 8g of sodium iron ethylenediamine tetraacetate, 4.5g of urea, 6g of a high-molecular water-retaining agent, 9ml of bacillus licheniformis and 4ml of Zhaodong pseudomonas, wherein the effective viable bacteria concentration of the bacillus licheniformis is 8 multiplied by 106CFU/mL, effective viable bacteria concentration of Pseudomonas east 8X 106CFU/mL。
The preparation method comprises the following steps: s1) crushing quicklime and ground phosphate rock, sieving with a 120-mesh sieve, and crushing rice straw carbon to 5-15 mm; s2) adding monopotassium phosphate, demineralized lignite-based modified humic acid, ammoniated humic acid, sodium tripolyphosphate, phosphate, ethylene diamine tetraacetic acid sodium iron and urea, stirring and mixing uniformly, and then standing; s3), adding the macromolecule water-retaining agent, the bacillus licheniformis and the Zhaodong pseudomonas, stirring and mixing evenly, standing, drying and crushing to obtain the contaminated soil treatment modifier.
Example 4
A polluted soil treatment modifier comprises 39g of quicklime, 3.5g of rice straw carbon, 3g of bean straw carbon, 15g of monopotassium phosphate, 25g of ground phosphate rock, 13g of demineralized lignite-based modified humic acid, 5g of ammoniated humic acid, 8g of sodium dodecyl sulfate, 2.5g of phosphate, 10g of sodium iron ethylenediaminetetraacetate, 5g of urea and 7.5g of a high-molecular water-retaining agent.
The preparation method comprises the following steps: s1) crushing quicklime and ground phosphate rock, sieving with a 120-mesh sieve, and crushing rice straw carbon and bean straw carbon to 5-15 mm; s2), adding monopotassium phosphate, demineralized lignite-based modified humic acid, ammoniated humic acid, sodium dodecyl sulfate, phosphate, ethylene diamine tetraacetic acid sodium iron and urea, stirring and mixing uniformly, and standing; s3), adding a macromolecular water-retaining agent, stirring and mixing uniformly, standing, drying and crushing to obtain the contaminated soil treatment modifier.
The application example is as follows:
the soil remediation method comprises the following steps: excavating the soil from the polluted land, loading and transporting the soil to a storage yard, and performing anti-seepage treatment on the bottom of the storage yard; crushing the soil to be polluted, then sieving to sort out stones and other larger impurities, wherein the aperture of a sieve hole during sieving is 40 mm; adding the screened polluted soil into a stirrer, adding water, stirring and mixing uniformly to obtain slurry, wherein the mass fraction of water in the slurry is 28.5%; adding the modifying agent in the embodiment 1-4 into the slurry, wherein the adding amount of the modifying agent is 70kg of repairing modifying agent added into each cubic meter of slurry, setting a comparative example, adding no modifying agent into the comparative example, stirring for 30min to uniformly mix materials, and discharging the stirred slurry from a stirrer; transferring the slurry discharged from the stirrer to a storage yard, stacking the slurry into a soil pile with the height of 1m by a forklift, and maintaining for 7 days, wherein the temperature during maintenance is controlled to be 25 ℃, and the humidity is controlled to be not less than 80%; and after the maintenance is finished, sampling and detecting.
The heavy metal content in the soil is measured by adopting a TCLP toxicity leaching method, and the test data is shown in a table 1; and the organic matter content and the conductivity of the soil after four months were measured, and the test data are shown in table 2.
Table 1 heavy metal content test results
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example | |
| Pb（mg/kg） | 8.26 | 8.18 | 6.29 | 7.92 | 593 |
| Cd（mg/kg） | 0.03 | 0.04 | 0.03 | 0.02 | 7.7 |
| Cr（mg/kg） | 12.55 | 11.76 | 12.18 | 11.89 | 118 |
| Zn（mg/kg） | 17.36 | 17.88 | 16.98 | 17.25 | 147 |
Table 2 organic content/conductivity test results
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example | |
| Organic matter (g/kg) | 177.39 | 168.88 | 192.36 | 181.67 | 88.46 |
| Conductivity (. mu.S/cm)-1） | 16.32 | 16.58 | 16.16 | 15.93 | 12.37 |
By adding the biochar and using the biochar together with the decarbonized lignite-based modified humic acid, the concentrations of Cd, Pb and Zn can be greatly reduced, and the soil environment is improved; the humic acid ammoniated by the ammonium bicarbonate and the biological bacterial fertilizer are used together, so that the soil base ions can be reduced, and nutrients can be provided for the growth of crops.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The polluted soil treatment modifier is characterized by comprising 33-45g of quicklime, 5-9g of biochar, 15-22g of monopotassium phosphate, 18-25g of ground phosphate rock, 15-20g of modified humic acid, 3-8g of a dispersing agent, 2-6g of a wetting agent, 7-10g of sodium iron ethylene diamine tetraacetate, 3-6g of urea, 6-12g of a polymer water-retaining agent and 0-20ml of a biological bacterial fertilizer.
2. The contaminated soil treatment improver according to claim 1, which comprises 35 to 40g of quicklime, 6 to 8g of biochar, 16 to 20g of monopotassium phosphate, 20 to 24g of ground phosphate rock, 16 to 18g of modified humic acid, 5 to 8g of dispersant, 2 to 6g of wetting agent, 7 to 10g of sodium iron ethylenediamine tetraacetate, 3 to 6g of urea, 6 to 12g of polymer water-retaining agent and 3 to 15ml of biological bacterial fertilizer.
3. The contaminated soil treatment improver according to claim 2, wherein the biochar is one or more of corn stalk carbon, peanut shell carbon, corncob carbon, rice stalk carbon and bean stalk carbon.
4. A contaminated soil treatment amendment according to claim 2, wherein the modified humic acid is a lignite-based humic acid and ammoniated humic acid complex in a weight ratio of (2-3) to 1.
5. A contaminated soil treatment amendment according to claim 4, wherein said lignite-based humic acid is demineralized lignite-based modified humic acid and said ammoniated humic acid is ammonium bicarbonate ammoniated modified humic acid.
6. The contaminated soil treatment improver according to claim 2, wherein the wetting agent is any one or more of phosphate, ethanol and span.
7. The contaminated soil treatment improver according to claim 2, wherein the dispersant is one or more selected from the group consisting of hydrolyzed polymaleic anhydride, sodium tripolyphosphate, sodium lauryl sulfate, and methyl cyclopentadienyl alcohol.
8. Contaminated soil treatment amendment according to claim 2, characterized in that said biological bacterial manure is a complex of Bacillus licheniformis and Pseudomonas eastern, the volume ratio of which is (2-2.4): 1.
9. A contaminated soil treatment amendment according to claim 8, wherein the effective viable bacterial concentration of Bacillus licheniformis is 2 x 106-8×107CFU/mL; the effective viable bacteria concentration of the pseudomonas pseudodontophilus is 5 multiplied by 105-8×107CFU/mL。
10. A process for the preparation of a contaminated soil treatment amendment according to any one of claims 1 to 9, comprising the steps of,
s1) crushing quicklime and ground phosphate rock, sieving with a 120-mesh sieve, and crushing biochar to 5-15 mm;
s2), adding monopotassium phosphate, modified humic acid, a dispersing agent, a wetting agent, ethylene diamine tetraacetic acid sodium iron and urea, stirring and mixing uniformly, and standing;
s3), adding the macromolecular water-retaining agent and the biological bacterial fertilizer, stirring and mixing uniformly, standing, drying and crushing to obtain the contaminated soil treatment modifier.
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| CN114250173A (en) * | 2021-12-10 | 2022-03-29 | 青岛蔚蓝赛德生物科技有限公司 | Zhaodong pseudomonas strain and application thereof |
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Cited By (3)
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| CN111777474A (en) * | 2020-06-09 | 2020-10-16 | 苏州建邦生态科技发展有限公司 | Microbial treatment agent |
| CN114250173A (en) * | 2021-12-10 | 2022-03-29 | 青岛蔚蓝赛德生物科技有限公司 | Zhaodong pseudomonas strain and application thereof |
| CN114250173B (en) * | 2021-12-10 | 2022-06-14 | 青岛蔚蓝赛德生物科技有限公司 | Zhaodong pseudomonas strain and application thereof |
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