CN115417731B - Preparation method of thallium-polluted soil restoration fertilizer, and product and application thereof - Google Patents
Preparation method of thallium-polluted soil restoration fertilizer, and product and application thereof Download PDFInfo
- Publication number
- CN115417731B CN115417731B CN202210985095.1A CN202210985095A CN115417731B CN 115417731 B CN115417731 B CN 115417731B CN 202210985095 A CN202210985095 A CN 202210985095A CN 115417731 B CN115417731 B CN 115417731B
- Authority
- CN
- China
- Prior art keywords
- thallium
- ferromanganese
- sodium hydroxide
- powder
- carbon powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Pest Control & Pesticides (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a preparation method of thallium-polluted soil remediation fertilizer, which comprises the following steps: (1) Dissolving ferric sulfate and potassium permanganate in water to obtain ferromanganese solution; (2) Weighing sodium hydroxide solid, and dissolving the sodium hydroxide solid in water to obtain sodium hydroxide solution; (3) Mixing and stirring the activated carbon powder and ferromanganese solution to obtain ferromanganese carbon slurry; (4) Uniformly stirring ferromanganese carbon slurry and sodium hydroxide solution, drying and grinding to obtain ferromanganese carbon powder; (5) Mixing plant ash, zeolite powder and ferromanganese powder. The invention also discloses a fertilizer prepared by the method and application thereof. The thallium-polluted soil remediation fertilizer disclosed by the invention is simple in preparation method, easy in raw material acquisition and strong in practicability; the method is quick in effect and obvious in effect, and can effectively reduce the thallium leaching concentration of thallium-polluted soil after a few days of use, and can also effectively maintain the cultivation property and fertility of the soil.
Description
Technical Field
The invention belongs to the field of preparation of heavy metal contaminated soil restoration agents, and particularly relates to a preparation method of thallium contaminated soil restoration fertilizer, a product and application thereof.
Background
Thallium is widely used in the fields of communication, military industry, aerospace, etc. Thallium is a highly toxic heavy metal element, has far more harm to human health than other heavy metal elements, has toxicity even more than arsenic, and has stronger environment mobility and biological enrichment. Thallium has an atomic number of 81, is located in group IIIA of the periodic Table, causes little harm to human and ecological environment due to naturally dispersed thallium, and is difficult to form enrichment effect. Disordered exploitation of thallium-containing ore deposit and improper management of tailings are main causes of thallium pollution of soil in mining areas, and meanwhile, the free emission of thallium-containing industrial wastewater, exploitation and combustion of thallium-containing coal mine, transitional use of thallium-containing fertilizer and the like are also main causes of serious thallium pollution of soil (including construction land and agricultural land).
Once the thallium pollutant enters the soil environment, the thallium pollutant can permeate into deep soil through ion exchange and ion migration, so that not only can the groundwater pollution of a water layer be caused, but also vegetation growth can be endangered, and human health can be further endangered through food chain enrichment. The effect of thallium contamination is permanent and is difficult to remove in a short period of time by natural transformation or alternate vegetation growth.
At present, the thallium contaminated soil remediation method comprises a leaching method, a foreign soil dilution method, a chemical stabilization method and an electric driving method. Although the leaching method, the chemical stabilization method and the electric drive method can reduce thallium pollution toxicity to a certain extent to realize thallium reduction, the use of the chemical leaching agent and the chemical stabilizer can seriously destroy the original components of soil and reduce the plowability of the soil.
Disclosure of Invention
The invention aims to: a first object of the present invention is to provide a thallium contaminated soil remediation fertilizer that maintains or improves fertility of soil while achieving thallium contamination removal.
The second object of the invention is to provide a method for preparing the thallium contaminated soil remediation fertilizer.
The third object of the invention is to provide the application of the thallium-polluted soil restoration fertilizer in the restoration of thallium-polluted soil.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a method for preparing a thallium contaminated soil remediation fertilizer, comprising the steps of:
(1) Dissolving ferric sulfate and potassium permanganate in water, and stirring until the ferric sulfate and the potassium permanganate are completely dissolved to obtain a ferromanganese solution;
(2) Dissolving sodium hydroxide solid in water, and stirring until sodium hydroxide is completely dissolved to obtain sodium hydroxide solution;
(3) Mixing and stirring the activated carbon powder and the ferromanganese solution obtained in the step (1) to obtain ferromanganese carbon slurry;
(4) Uniformly stirring the ferromanganese carbon slurry obtained in the step (3) and the sodium hydroxide solution obtained in the step (2), drying and grinding to obtain ferromanganese carbon powder;
(5) And (3) uniformly mixing plant ash, zeolite powder and ferromanganese powder obtained in the step (4).
Preferably, in the step (1), the molar ratio of the ferric sulfate to the potassium permanganate is 0.5-9: 1.
preferably, the molar ratio of the sodium hydroxide solid in the step (2) to the ferric sulfate in the step (1) is 3-6: 1.
preferably, the mass ratio of the activated carbon in the step (3) to the potassium permanganate in the step (1) is 25-650: 1.
preferably, in the step (5), the mass ratio of the plant ash to the zeolite powder to the ferromanganese carbon powder is 2.5-47.5: 7.5 to 60:100.
the invention also comprises the thallium-polluted soil restoration fertilizer prepared by the preparation method.
The invention also comprises application of the thallium-polluted soil restoration fertilizer in restoring soil, wherein the application comprises the steps of mixing the thallium-polluted soil restoration fertilizer with thallium-polluted soil, uniformly stirring, uniformly sprinkling water, and aging for standing.
Preferably, the mass ratio of the thallium-polluted soil remediation fertilizer to the thallium-polluted soil is 2.5-27.5: 100.
the reaction mechanism of the invention:
in the process of mixing the activated carbon powder and the ferromanganese solution, permanganate radicals, ferric ions react with undegraded oily substances and simple substance carbon in the activated carbon powder to generate manganese oxide, ferromanganese oxide and hydrocarbon. Mixing ferromanganese carbon slurry with sodium hydroxide solution, and reacting hydroxyl ions in the sodium hydroxide solution with manganese oxide, iron manganese oxide and hydrocarbon in the ferromanganese carbon slurry to generate a blend of carbon-loaded iron manganese oxide and hydroxide. And mixing plant ash, zeolite powder and ferromanganese carbon powder, uniformly stirring, and after the thallium-polluted soil is mixed, realizing selective adsorption, efficient oxidation and effective fixation of thallium pollutants in thallium-polluted soil pores by the synergistic effect of the plant ash, the zeolite powder and the ferromanganese carbon powder, thereby realizing effective remediation of thallium-polluted soil.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages: the preparation method has the advantages that (1) raw materials are easy to obtain; (2) The thallium-polluted soil restoration fertilizer has strong practicability, can restore thallium-polluted soil after being stirred with the soil, and does not need other operations; (3) The effect is quick, the effect is obvious, the thallium leaching concentration of thallium-polluted soil can be effectively reduced within a few days, and the minimum leaching concentration is only 0.063 mug/L; (4) Can effectively maintain the cultivation property and fertility of the soil, and the growth ratio of the soil rice root system relative to the root system after soil remediation can reach 128 percent at most.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
Preparing thallium-contaminated soil: 1kg of an uncontaminated soil sample was weighed, 10mg of thallium was then added to the soil sample, 1ml of water was added per 1mg of soil, the mixture was stirred uniformly, and the mixture was aged for 24 hours and then naturally dried in air.
Example 1 influence of molar ratio of ferric sulfate and Potassium permanganate on the performance of thallium contaminated soil remediation fertilizer
1. Preparing thallium-polluted soil restoration fertilizer
(1) According to the mole ratio of 0.5: 1. 1: 1. 1.5: 1. 2: 1. 4: 1. 6:1. 7: 1. 8: 1. 9:1 respectively weighing ferric sulfate and potassium permanganate, dissolving in water, and stirring until the ferric sulfate and the potassium permanganate are completely dissolved, so as to prepare nine groups of ferromanganese solutions.
(2) According to the molar ratio of sodium hydroxide to ferric sulfate of 3:1, weighing sodium hydroxide, dissolving in water, stirring until the sodium hydroxide is completely dissolved, and preparing sodium hydroxide solution.
(3) According to the mass ratio of the activated carbon powder to the potassium permanganate of 50:1 weighing active carbon powder. And respectively mixing the activated carbon powder with nine groups of ferromanganese solutions, and stirring for 0.5 hour to obtain nine groups of ferromanganese carbon slurry.
(4) Mixing nine groups of ferromanganese carbon slurry and sodium hydroxide solution respectively, stirring for 0.5 hour, drying and grinding to obtain nine groups of ferromanganese carbon powder.
(5) According to the mass ratio of 5:15:100, respectively weighing plant ash, zeolite powder and ferromanganese carbon powder, and uniformly stirring to obtain nine groups of thallium-polluted soil restoration fertilizer.
2. Thallium contaminated soil remediation
According to the mass ratio of 5:100, respectively mixing the prepared nine groups of thallium-polluted soil restoration fertilizers with thallium-polluted soil, uniformly stirring, uniformly sprinkling water, aging and standing for 7 days to obtain nine groups of restored thallium-polluted soil.
3. Toxicity Leaching test
Toxicity leaching tests were performed on thallium contaminated soil and post-remediation soil samples according to the solid waste leaching toxicity leaching method sulfuric acid method (HJ/T299-2007), respectively.
4. Thallium ion concentration detection
Thallium-contaminated soil and thallium concentration in the repaired soil sample leachate are respectively measured by a graphite furnace atomic absorption spectrophotometry (HJ 748-2015) method for measuring thallium in water quality.
5. Plant root growth detection for restoring soil
Selecting rice as a tested plant, and performing a plant root growth experiment of the rice in detoxified Soil and a root growth experiment (blank control) of the rice plant in uncontaminated Soil according to the international standard of Soil quality-Determination of the effects of pollutants on Soil flora-Part 1: method for the measurement of inhibition of root growth (ISO 11269-1-2012). According to the detection result, calculating the relative root system growth ratio of the rice according to the following formula:
relative root growth ratio of rice = root growth length of rice plant in detoxified soil/root growth length of rice plant in uncontaminated soil.
6. Experimental results
TABLE 1 influence of molar ratio of ferric sulfate to Potassium permanganate on the performance of thallium contaminated soil remediation fertilizers
As can be seen from table 1, when the molar ratio of iron sulfate to potassium permanganate is less than 2:1 (sequence numbers 1, 2 and 3 in table 1), the ferric sulfate doping amount is less, the potassium permanganate doping amount is too much, the generation amount of the ferric manganese oxide, the carbon-carried ferric manganese oxide and hydroxide blend is less, the thallium leaching concentration of thallium polluted soil is obviously increased along with the reduction of the molar ratio of the ferric sulfate to the potassium permanganate, and the relative root growth ratio of rice is obviously reduced along with the reduction of the molar ratio of the ferric sulfate to the potassium permanganate.
When the mole ratio of the ferric sulfate to the potassium permanganate is 2-6: 1 (sequence numbers 4, 5 and 6 in table 1), in the process of mixing the activated carbon powder with the ferromanganese solution, permanganate, ferric ions react with undegraded oily substances and simple substance carbon in the activated carbon powder to generate manganese oxide, ferromanganese oxide and hydrocarbon. Mixing ferromanganese carbon slurry with sodium hydroxide solution, and reacting hydroxyl ions in the sodium hydroxide solution with manganese oxide, iron manganese oxide and hydrocarbon in the ferromanganese carbon slurry to generate a carbon-loaded iron manganese oxide and hydroxide blend. Finally, the thallium leaching concentration of the thallium-polluted soil after detoxification is lower than 0.87 mug/L, and the relative root growth ratio of the rice is higher than 114%.
When the molar ratio of the ferric sulfate to the potassium permanganate is greater than 6:1 (SEQ ID Nos. 7, 8 and 9 in Table 1), the iron sulfate is excessively doped, the potassium permanganate is less doped, the iron manganese oxide, the carbon-supported iron manganese oxide and hydroxide blend are less generated, the thallium leaching concentration of the detoxified thallium polluted soil is obviously increased along with the further increase of the molar ratio of the iron sulfate to the potassium permanganate, and the relative root growth ratio of the rice is obviously reduced along with the further increase of the molar ratio of the iron sulfate to the potassium permanganate.
In summary, when the mole ratio of the ferric sulfate to the potassium permanganate is 2-6: and 1, the method is most beneficial to realizing detoxification and restoration of thallium polluted soil.
Example 2 influence of activated carbon powder and Potassium permanganate Mass ratio on the performance of thallium contaminated soil remediation fertilizer
1. Preparing thallium-polluted soil restoration fertilizer
(1) According to the mole ratio of 6:1, respectively weighing ferric sulfate and potassium permanganate, dissolving in water, and stirring until the ferric sulfate and the potassium permanganate are completely dissolved to prepare a ferromanganese solution;
(2) According to the molar ratio of sodium hydroxide to ferric sulfate of 4.5:1, weighing sodium hydroxide, dissolving in water, stirring until the sodium hydroxide is completely dissolved, and preparing sodium hydroxide solution.
(3) According to the mass ratio of the active carbon powder to the potassium permanganate of 25: 1. 30: 1. 40: 1. 50:1. 275: 1. 500: 1. 550). 1. 600: 1. 650:1, respectively weighing active carbon powder. Mixing the activated carbon powder with ferromanganese solution, and stirring for 2 hours to obtain nine groups of ferromanganese carbon slurry.
(4) Mixing nine groups of ferromanganese carbon slurry and sodium hydroxide solution respectively, stirring for 2 hours, drying, grinding to obtain nine groups of ferromanganese carbon powder.
(5) According to the mass ratio of 20:30:100, respectively weighing plant ash, zeolite powder and ferromanganese carbon powder, mixing and stirring uniformly to obtain nine groups of thallium-polluted soil restoration fertilizers.
The method for preparing the repaired thallium polluted soil, carrying out a toxicity leaching test, detecting the thallium ion concentration and detecting the growth of the root system of the repaired soil is the same as that of the embodiment 1.
2. Experimental results
TABLE 2 influence of activated carbon powder to Potassium permanganate Mass ratio on the performance of thallium contaminated soil remediation fertilizers
As can be seen from table 2, when the mass ratio of activated carbon powder to potassium permanganate is less than 50:1 (sequence numbers 1, 2 and 3 in table 2), the mixing amount of the activated carbon powder is less, the permanganate is too much, the undegraded oily substances and simple substance carbon are less, the thallium leaching concentration of the detoxified thallium polluted soil is obviously increased along with the reduction of the mass ratio of the activated carbon powder to the potassium permanganate, and the relative root growth ratio of rice is obviously reduced along with the reduction of the mass ratio of the activated carbon powder to the potassium permanganate.
When the mass ratio of the activated carbon powder to the potassium permanganate is 50-500: 1 (sequence numbers 4, 5 and 6 in table 2), in the process of mixing the activated carbon powder with the ferromanganese solution, permanganate, ferric ions react with undegraded oily substances and simple substance carbon in the activated carbon powder to generate manganese oxide, ferromanganese oxide and hydrocarbon. Mixing ferromanganese carbon slurry with sodium hydroxide solution, and reacting hydroxyl ions in the sodium hydroxide solution with manganese oxide, iron manganese oxide and hydrocarbon in the ferromanganese carbon slurry to generate a carbon-loaded iron manganese oxide and hydroxide blend. Finally, the thallium leaching concentration of thallium polluted soil is lower than 0.43 mug/L, and the growth ratio of rice relative to root system is higher than 121%.
When the mass ratio of the activated carbon powder to the potassium permanganate is more than 500:1 (SEQ ID Nos. 7, 8 and 9 in Table 2), the active carbon powder is too much, the permanganate radical, the iron ions and the undegraded oily substances and simple substance carbon in the active carbon powder react insufficiently in the process of the active carbon powder and ferromanganese solution, so that the thallium leaching concentration of the detoxified thallium polluted soil is obviously increased along with the further increase of the mass ratio of the active carbon powder to the potassium permanganate, and the relative root growth ratio of the rice is obviously reduced along with the further increase of the mass ratio of the active carbon powder to the potassium permanganate.
In combination, the benefit and the cost are combined, and the mass ratio of the activated carbon powder to the potassium permanganate is 50-500: and 1, the method is most beneficial to realizing detoxification and restoration of thallium polluted soil.
Example 3 influence of plant Ash, zeolite powder, ferromanganese carbon powder mass ratio on the performance of thallium contaminated soil remediation fertilizer
1. Preparing thallium-polluted soil restoration fertilizer
(1) According to the mole ratio of 6:1 respectively weighing ferric sulfate and potassium permanganate, dissolving in water, and stirring until the ferric sulfate and the potassium permanganate are completely dissolved to prepare a ferromanganese solution.
(2) According to the molar ratio of sodium hydroxide to ferric sulfate of 6:1, weighing sodium hydroxide, dissolving in water, stirring until the sodium hydroxide is completely dissolved, and preparing sodium hydroxide solution.
(3) According to the mass ratio of the activated carbon powder to the potassium permanganate of 500:1 weighing active carbon powder. Mixing the activated carbon powder with ferromanganese solution, and stirring for 3.5 hours to obtain ferromanganese carbon slurry.
(4) Mixing ferromanganese carbon slurry with sodium hydroxide solution, stirring for 3.5 hours, drying, grinding to obtain ferromanganese carbon powder.
(5) According to the mass ratio of 2.5:15: 100. 3:15: 100. 4:15: 100. 5:7.5: 100. 5:10: 100. 5:12.5: 100. 5:15: 100. 20:15: 100. 35:15: 100. 5:30: 100. 20:30: 100. 35:30: 100. 5:45: 100. 20:45: 100. 35:45: 100. 35:50: 100. 35:55: 100. 35:60: 100. 40:45: 100. 45:45: 100. 47.5:45:100, respectively weighing plant ash, zeolite powder and ferromanganese carbon powder, mixing and stirring uniformly to obtain 21 groups of thallium-polluted soil remediation fertilizer.
The preparation of the repaired thallium contaminated soil, the toxicity leaching test, the thallium ion concentration detection and the growth detection of the root system of the repaired soil are the same as those of the embodiment 1.
2. Experimental results
TABLE 3 influence of plant ash, zeolite powder, ferromanganese carbon powder mass ratio on the performance of thallium contaminated soil remediation fertilizer
As can be seen from table 3, when the mass ratio of plant ash to ferromanganese carbon powder is less than or equal to 5:100, and the mass ratio of the zeolite powder to the ferromanganese carbon powder is less than or equal to 15:100 (nos. 1, 2, 3, 4, 5, 6, 7 in table 3) the plant ash and zeolite powder are less doped, the thallium pollutant selective adsorption, efficient oxidation and effective fixation in the thallium contaminated soil interstitial fluid are all poor, resulting in a significant increase in the thallium leaching concentration of detoxified thallium contaminated soil with a decrease in the mass ratio of plant ash, zeolite powder, ferromanganese carbon powder, while the relative root growth ratio of rice is significantly decreased with a decrease in the mass ratio of plant ash, zeolite powder, ferromanganese carbon powder.
When the mass ratio of the plant ash to the ferromanganese carbon powder is 5-35: 100, and the mass ratio of the zeolite powder to the ferromanganese carbon powder is 15-45: 100 (SEQ ID Nos. 8, 9, 10, 11, 12, 13 and 14 in Table 3) the plant ash, zeolite powder and ferromanganese carbon powder are mixed and stirred uniformly, and after thallium contaminated soil is mixed, the plant ash, zeolite powder and ferromanganese carbon powder act synergistically to realize selective adsorption, efficient oxidation and effective fixation of thallium contaminants in the thallium contaminated soil interstitial fluid, thereby realizing effective remediation of thallium contaminated soil. Finally, the thallium leaching concentration of the thallium-polluted soil after detoxification is lower than 0.1 mug/L, and the relative root growth ratio of the rice is higher than 122%.
When the mass ratio of plant ash to ferromanganese carbon powder is more than or equal to 35:100, and the mass ratio of the zeolite powder to the ferromanganese carbon powder is greater than or equal to 45:100 (in Table 3, the numbers 15, 16, 17, 18, 19, 20 and 21) the thallium leaching concentration of the thallium contaminated soil and the relative root growth ratio of the rice are not significantly changed with the further increase of the mass ratio of plant ash, zeolite powder and ferromanganese carbon powder.
In summary, when the mass ratio of plant ash, zeolite powder and ferromanganese carbon powder is 5-35: 15-45: 100, the method is most favorable for realizing detoxification and restoration of thallium polluted soil.
EXAMPLE 4 influence of the amount of thallium-contaminated soil remediation fertilizer on the effect of thallium-contaminated soil remediation
1. Preparing thallium-polluted soil restoration fertilizer
(1) According to the mole ratio of 6:1 respectively weighing ferric sulfate and potassium permanganate, dissolving in water, stirring until the ferric sulfate and the potassium permanganate are completely dissolved, and preparing ferromanganese solution
(2) According to the molar ratio of sodium hydroxide to ferric sulfate of 6:1, weighing sodium hydroxide, dissolving in water, stirring until the sodium hydroxide is completely dissolved, and preparing sodium hydroxide solution.
(3) According to the mass ratio of the activated carbon powder to the potassium permanganate of 500:1 weighing active carbon powder. Mixing the activated carbon powder with ferromanganese solution, and stirring for 3.5 hours to obtain ferromanganese carbon slurry.
(4) Mixing ferromanganese carbon slurry with sodium hydroxide solution, stirring for 3.5 hours, drying, grinding to obtain ferromanganese carbon powder. According to the mass ratio of 35:45:100, respectively weighing plant ash, zeolite powder and ferromanganese carbon powder, mixing and stirring uniformly to obtain the thallium contaminated soil remediation fertilizer.
2. Thallium contaminated soil remediation
The mass ratio is 2.5: 100. 7.5:100. 12.5: 100. 17.5: 100. 22.5: 100. 27.5:100, mixing the prepared thallium-polluted soil restoration fertilizer with thallium-polluted soil, adding 1ml of water into each 1mg of soil, aging and standing for 7 days to obtain six groups of restored thallium-polluted soil.
The toxicity leaching test, thallium ion concentration detection and soil root growth restoration detection are the same as those of example 1.
3. Experimental results
TABLE 4 influence of the amount of the thallium-contaminated soil restoration fertilizer on the restoration effect of thallium-contaminated soil
As can be seen from Table 4, when the amount of the prepared thallium contaminated soil remediation fertilizer is increased, the thallium leaching concentration of the thallium contaminated soil is further reduced and the relative root growth ratio of the rice is improved.
Comparative example 1 influence of different comparative technologies on the performance of thallium-contaminated soil remediation fertilizer
1. Preparing thallium-polluted soil restoration fertilizer
The process comprises the following steps:
(1) According to the mole ratio of 6:1 respectively weighing ferric sulfate and potassium permanganate, dissolving in water, stirring until the ferric sulfate and the potassium permanganate are completely dissolved, and preparing ferromanganese solution
(2) According to the molar ratio of sodium hydroxide to ferric sulfate of 6:1, weighing sodium hydroxide, dissolving in water, stirring until the sodium hydroxide is completely dissolved, and preparing sodium hydroxide solution.
(3) According to the mass ratio of the activated carbon powder to the potassium permanganate of 500:1 weighing active carbon powder. Mixing the activated carbon powder with ferromanganese solution, and stirring for 3.5 hours to obtain ferromanganese carbon slurry.
(4) Mixing ferromanganese carbon slurry with sodium hydroxide solution, stirring for 3.5 hours, drying, grinding to obtain ferromanganese carbon powder.
(5) According to the mass ratio of 35:45:100, weighing plant ash, zeolite powder and ferromanganese carbon powder, mixing and stirring uniformly to obtain the thallium contaminated soil remediation fertilizer.
Comparison Process 1:
the steps (1) to (4) are consistent with the invention, the step (5) of the comparison process 1 is changed to the step of adding no plant ash, and the mass ratio is 45:100, weighing zeolite powder and ferromanganese carbon powder, mixing and stirring uniformly to obtain the thallium contaminated soil remediation fertilizer.
Comparison scheme 2:
steps (1) to (4) are consistent with the invention, and the step (5) of the comparison process 1 is changed to be free of adding zeolite powder according to the mass ratio of 35:100, weighing plant ash and ferromanganese carbon powder, mixing and stirring uniformly to obtain the thallium-polluted soil remediation fertilizer.
The preparation of the repaired thallium contaminated soil, the toxicity leaching test, the thallium ion concentration detection and the growth detection of the root system of the repaired soil are the same as those of the embodiment 1.
2. Experimental results
TABLE 5 influence of different comparative processes on the performance of thallium contaminated soil remediation fertilizer
| Sequence number | Type of process | Thallium leaching concentration (μg/L) | Relative root growth ratio of rice |
| 3 | The process of the invention | 0.063 | 128.06％ |
| 1 | Comparative Process 1 | 0.335 | 104.67％ |
| 2 | Comparative Process 2 | 0.234 | 108.95％ |
As can be seen from Table 5, the thallium leaching concentration of the thallium contaminated soil after the thallium contaminated soil restoration fertilizer is restored by the comparison process 1 and the comparison process 2 is obviously higher than that of the process of the invention, and the relative root growth ratio of the rice is obviously lower than that of the process grass of the invention. Therefore, on the repair of thallium polluted soil, wood ash, zeolite powder and ferromanganese carbon powder have synergistic effect, and the effect is best when the wood ash, the zeolite powder and the ferromanganese carbon powder are added simultaneously.
Claims (4)
1. The preparation method of the thallium-polluted soil restoration fertilizer is characterized by comprising the following steps:
(1) Dissolving ferric sulfate and potassium permanganate in water, and stirring until the ferric sulfate and the potassium permanganate are completely dissolved to obtain a ferromanganese solution;
(2) Dissolving sodium hydroxide solid in water, and stirring until sodium hydroxide is completely dissolved to obtain sodium hydroxide solution;
(3) Mixing and stirring the activated carbon powder and the ferromanganese solution obtained in the step (1) to obtain ferromanganese carbon slurry;
(4) Uniformly stirring the ferromanganese carbon slurry obtained in the step (3) and the sodium hydroxide solution obtained in the step (2), drying and grinding to obtain ferromanganese carbon powder;
(5) Uniformly mixing plant ash, zeolite powder and ferromanganese carbon powder in the step (4) to obtain the composite material;
the molar ratio of the ferric sulfate to the potassium permanganate in the step (1) is 2-6: 1, the molar ratio of the sodium hydroxide solid in the step (2) to the ferric sulfate in the step (1) is 3-6: 1, the mass ratio of the active carbon in the step (3) to the potassium permanganate in the step (1) is 50-500: 1, in the step (5), the mass ratio of the plant ash to the zeolite powder to the ferromanganese powder is 5-35: 15-45: 100.
2. the thallium-contaminated soil remediation fertilizer of claim 1 prepared by the method of preparation.
3. The use of the thallium contaminated soil remediation fertilizer of claim 2 in remediation of soil, wherein the thallium contaminated soil remediation fertilizer is mixed with thallium contaminated soil, stirred evenly, spread with water evenly, aged and placed.
4. The use according to claim 3, wherein the mass ratio of the thallium contaminated soil remediation fertilizer to the thallium contaminated soil is 2.5-27.5: 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210985095.1A CN115417731B (en) | 2022-08-17 | 2022-08-17 | Preparation method of thallium-polluted soil restoration fertilizer, and product and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210985095.1A CN115417731B (en) | 2022-08-17 | 2022-08-17 | Preparation method of thallium-polluted soil restoration fertilizer, and product and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115417731A CN115417731A (en) | 2022-12-02 |
| CN115417731B true CN115417731B (en) | 2023-08-22 |
Family
ID=84198314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210985095.1A Active CN115417731B (en) | 2022-08-17 | 2022-08-17 | Preparation method of thallium-polluted soil restoration fertilizer, and product and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115417731B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103183330A (en) * | 2013-04-02 | 2013-07-03 | 中国矿业大学 | Controllable synthesis method for nitrogen and phosphorus co-doped graphitized carbon ball with hollow structure |
| CN104927870A (en) * | 2015-06-05 | 2015-09-23 | 中国地质科学院矿产资源研究所 | Novel material for repairing heavy metal Cr-Pb-Cd polluted soil, and preparation method and application method thereof |
| CN109078972A (en) * | 2017-06-14 | 2018-12-25 | 中国地质科学院矿产资源研究所 | Heavy metal contaminated soil remediation material and application method thereof |
| CN110465544A (en) * | 2019-09-25 | 2019-11-19 | 常熟理工学院 | A kind of method of repairing hexavalent chromium polluted arable soil |
| CN110627580A (en) * | 2019-09-25 | 2019-12-31 | 常熟理工学院 | Soil iron supplement for agricultural land and preparation method thereof |
| CN111087263A (en) * | 2019-11-13 | 2020-05-01 | 刘海威 | Composite repairing agent for organic contaminated soil, preparation method and application thereof |
| CN112029508A (en) * | 2020-09-10 | 2020-12-04 | 常熟理工学院 | Thallium and arsenic contaminated soil remediation agent and preparation method and application thereof |
| CN113582767A (en) * | 2021-09-01 | 2021-11-02 | 上海久绿生物有机肥有限公司 | Fertilizer for greening planting soil and preparation method thereof |
-
2022
- 2022-08-17 CN CN202210985095.1A patent/CN115417731B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103183330A (en) * | 2013-04-02 | 2013-07-03 | 中国矿业大学 | Controllable synthesis method for nitrogen and phosphorus co-doped graphitized carbon ball with hollow structure |
| CN104927870A (en) * | 2015-06-05 | 2015-09-23 | 中国地质科学院矿产资源研究所 | Novel material for repairing heavy metal Cr-Pb-Cd polluted soil, and preparation method and application method thereof |
| CN109078972A (en) * | 2017-06-14 | 2018-12-25 | 中国地质科学院矿产资源研究所 | Heavy metal contaminated soil remediation material and application method thereof |
| CN110465544A (en) * | 2019-09-25 | 2019-11-19 | 常熟理工学院 | A kind of method of repairing hexavalent chromium polluted arable soil |
| CN110627580A (en) * | 2019-09-25 | 2019-12-31 | 常熟理工学院 | Soil iron supplement for agricultural land and preparation method thereof |
| CN111087263A (en) * | 2019-11-13 | 2020-05-01 | 刘海威 | Composite repairing agent for organic contaminated soil, preparation method and application thereof |
| CN112029508A (en) * | 2020-09-10 | 2020-12-04 | 常熟理工学院 | Thallium and arsenic contaminated soil remediation agent and preparation method and application thereof |
| CN113582767A (en) * | 2021-09-01 | 2021-11-02 | 上海久绿生物有机肥有限公司 | Fertilizer for greening planting soil and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115417731A (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102921142B (en) | Heavy metal contaminants immobilized reagent composition and immobilization administering method | |
| CN111085537B (en) | Method for restoring heavy metal contaminated soil by using organic phosphorus and inorganic phosphorus materials | |
| CN111234835B (en) | Repairing agent for in-situ repairing heavy metal contaminated soil and in-situ repairing method | |
| CN106147778A (en) | Passivator, preparation method and applications for repairing heavy metal in soil combined pollution | |
| CN110699084B (en) | Soil heavy metal pollution curing and repairing composite reagent and curing and repairing method | |
| Pichtel | Microbial respiration in fly ash/sewage sludge-amended soils | |
| CN107282625A (en) | A kind of heavy-metal contaminated soil renovation agent and its application and the method for repairing polluted soil | |
| CN104804747A (en) | Calcium-based heavy metal soil repairing agent and preparation method | |
| Garau et al. | Nitrogen mineralization in soil amended with sewage sludge and fly ash | |
| CN109762569B (en) | Heavy metal cadmium and arsenic composite contaminated soil remediation agent and preparation method thereof | |
| CN108971220B (en) | Preparation method of pyrite microorganism combined permeable reaction wall | |
| CN113058983B (en) | Method for restoring chromium-polluted soil by biochar-loaded hematite-shewanella photovoltaic complex | |
| CN110465544B (en) | Method for repairing hexavalent chromium polluted farmland soil | |
| CN109370596A (en) | A kind of in-situ passivation the reparation medicament, preparation method and application of cadmium arsenic combined pollution agricultural land soil | |
| CN111849501B (en) | Soil conditioner for repairing soil nickel pollution and preparation method and use method thereof | |
| CN111676020B (en) | Composite soil remediation agent and preparation method and application thereof | |
| CN115417731B (en) | Preparation method of thallium-polluted soil restoration fertilizer, and product and application thereof | |
| CN112044945A (en) | Stabilizing and repairing agent and repairing method for fluoride-contaminated soil | |
| Dovletyarova et al. | Challenges in reducing phytotoxicity of metals in soils affected by non-ferrous smelter operations | |
| CN107384423B (en) | Composite preparation for synchronously repairing polycyclic aromatic hydrocarbon-polluted and heavy metal-polluted soil and preparation method thereof | |
| Kizilkaya et al. | Influence of cadmium fractions on microbiological properties in Bafra plain soils | |
| CN111320986B (en) | Soil remediation technology | |
| Stefanescu et al. | Bioremediation perspective of Bacillus megaterium towards heavy metals in environments enriched with phosphogypsum | |
| deCatanzaro et al. | Effects of nickel addition on nitrogen mineralization, nitrification, and nitrogen leaching in some boreal forest soils | |
| CN109967520B (en) | Application of sorbitan fatty acid ester in activating soil arsenic and soil arsenic activating agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |