CN114106839A - Zinc-polluted soil stabilizing material and preparation method thereof - Google Patents
Zinc-polluted soil stabilizing material and preparation method thereof Download PDFInfo
- Publication number
- CN114106839A CN114106839A CN202111579277.0A CN202111579277A CN114106839A CN 114106839 A CN114106839 A CN 114106839A CN 202111579277 A CN202111579277 A CN 202111579277A CN 114106839 A CN114106839 A CN 114106839A
- Authority
- CN
- China
- Prior art keywords
- zinc
- phosphate
- oxide
- modified
- metal oxide
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
Abstract
The invention discloses a zinc-polluted soil stabilizing material and a preparation method thereof, wherein the zinc-polluted soil stabilizing material comprises the following components: the modified calcium-magnesium-zinc-phosphate material comprises an alkaline material, a metal oxide and a phosphate modified material, wherein the alkaline material is 0-50 parts, the metal oxide is 30-70 parts, the phosphate modified material is 20-45 parts, the alkaline material is one or more of calcium oxide, calcium carbonate and magnesium oxide, the metal oxide is one or more of iron oxide and aluminum oxide, the phosphate modified material is a phosphate modified clay mineral, and the modified clay mineral is one or more of montmorillonite, bentonite or attapulgite; the zinc-polluted soil stabilizing material and the preparation method thereof can be suitable for different types of zinc-polluted soil environments, have a good repairing effect on common zinc-polluted soil, are adjustable in form, low in comprehensive cost, free of secondary pollution and suitable for popularization and use.
Description
Technical Field
The invention relates to the technical field of soil pollution treatment, in particular to a zinc-polluted soil stabilizing material and a preparation method thereof.
Background
The lead-zinc ores in China are abundant in reserves and widely distributed, and the lead-zinc ores are distributed throughout the whole country and exist in areas such as northeast, northwest, east China, south China, southwest and the like. With the development of lead-zinc ores, slag, underground water in the deep part of a mine and mineral separation water are continuously discharged to peripheral farmlands, so that the environmental pollution of zinc is caused. Industrial waste water is also a way of causing zinc pollution of soil. The industries of mining, smelting, electroplating and the like can generate a large amount of zinc-containing waste water. In the development and smelting process of zinc-containing minerals, a large amount of zinc-containing wastewater can be discharged to the outside; based on the activity and chemical property of the zinc simple substance, the zinc-containing solution is frequently used in the electroplating industry, which results in the discharge of a large amount of zinc-containing waste liquid.
Although the health toxicity and harm of zinc-polluted soil are not as outstanding as those of lead and arsenic, the problem of relatively serious soil microorganism and plant ecological toxicity is generated when the zinc concentration of soil is too high, and the environmental mobility of zinc in soil is enhanced due to abnormal soil pH and too high concentration of chloride ions in soil when the zinc is polluted, so that the vertical pollution section depth is increased, and the water quality safety of underground water is influenced. Too high a leaching concentration of zinc also results in solid waste reaching the toxic leaching standards of hazardous waste, leading to lack of guarantee for safe re-use of land and serious ecological risk problems.
The soil treatment method for treating the zinc problem comprises physical restoration, chemical restoration, biological restoration and the like, but the methods have the disadvantages of complicated equipment, large investment and difficulty in large-scale use, and have great influence on the properties of the soil such as pH, fertility and the like, so that troubles are brought to users and the requirements cannot be met.
Disclosure of Invention
The invention aims to solve the problems and provides a zinc-polluted soil stabilizing material which is suitable for different types of zinc-polluted soil environments, has a good repairing effect on common zinc-polluted soil, is adjustable in form, low in comprehensive cost and free of secondary pollution and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows: a zinc-contaminated soil stabilizing material comprises the following components: the modified metal oxide coating comprises an alkaline material, a metal oxide and a phosphate modified material, wherein the alkaline material is 0-50 parts, the metal oxide is 30-70 parts, and the phosphate modified material is 20-45 parts.
Preferably, the alkaline material is 5-35 parts, the metal oxide is 35-65 parts, and the phosphate modified material is 25-35 parts.
Preferably, the alkaline material is one or more of calcium oxide, calcium carbonate and magnesium oxide.
Preferably, the metal oxide is one or more of iron oxide and aluminum oxide, the iron oxide is one or more of ferrous oxide, ferric oxide and ferroferric oxide, and the aluminum oxide is aluminum oxide.
Preferably, the phosphate modified material is a phosphate modified clay mineral, wherein the modified clay mineral is one or more of montmorillonite, bentonite or attapulgite.
Preferably, the phosphate modified clay mineral is formed by impregnating phosphate solution and modified clay mineral, and the mass ratio of phosphate to clay mineral in the phosphate modified material is 1:1 to 10.
Preferably, the phosphate in the phosphate modified material is one or more of monopotassium phosphate, dipotassium phosphate, trisodium phosphate and industrial phosphoric acid.
A preparation method of a zinc-polluted soil stabilizing material is characterized by comprising the following steps:
(1) grinding the alkaline material, the metal oxide and the phosphate modified material;
(2) fully and uniformly mixing the alkaline material, the metal oxide and the phosphate modified material which are ground in the step (1); and (3) sieving the alkali material, the metal oxide and the phosphate modified material mixed in the step (2).
Preferably, the basic material, the metal oxide and the phosphate modified material are ground to 0.5mm to 1mm in the step (1).
Preferably, the raw materials mixed in the step (3) are sieved to 20-200 meshes.
The invention discloses a zinc-polluted soil stabilizing material and a preparation method thereof, wherein the zinc-polluted soil stabilizing material comprises the following components: the modified calcium-magnesium-zinc-phosphate material comprises an alkaline material, a metal oxide and a phosphate modified material, wherein the alkaline material is 0-50 parts, the metal oxide is 30-70 parts, the phosphate modified material is 20-45 parts, the alkaline material is one or more of calcium oxide, calcium carbonate and magnesium oxide, the metal oxide is one or more of iron oxide and aluminum oxide, the phosphate modified material is a phosphate modified clay mineral, and the modified clay mineral is one or more of montmorillonite, bentonite or attapulgite; the zinc-polluted soil stabilizing material and the preparation method thereof can be suitable for different types of zinc-polluted soil environments, have a good repairing effect on common zinc-polluted soil, are adjustable in form, low in comprehensive cost, free of secondary pollution and suitable for popularization and use.
Detailed Description
The technical scheme of the invention is that the zinc-polluted soil stabilizing material comprises the following components: the modified metal oxide coating comprises an alkaline material, a metal oxide and a phosphate modified material, wherein the alkaline material is 0-50 parts, the metal oxide is 30-70 parts, and the phosphate modified material is 20-45 parts.
Wherein the alkaline material is 5-35 parts, the metal oxide is 35-65 parts, and the phosphate modified material is 25-35 parts; the alkaline material is one or more of calcium oxide, calcium carbonate and magnesium oxide, the calcium carbonate and the magnesium oxide are solid powder, the alkaline material is cheap and easy to obtain, the leaching toxicity of zinc in the soil can be effectively reduced by improving the pH value of the soil, and the stabilizing effect on the zinc is obvious; the metal oxide is one or more of iron oxide and aluminum oxide which are compounded, the iron oxide and the aluminum oxide have stronger adsorption effect, the leaching toxicity of zinc can be effectively reduced through the adsorption effect on zinc in soil, and the influence of the metal oxide on the pH value, the fertility and the like of the soil is small; wherein the iron oxide is one or more of ferrous oxide, ferric oxide and ferroferric oxide, and the aluminum oxide is aluminum oxide; the phosphate modified material is phosphate modified clay mineral, phosphate radical can react with zinc to generate precipitate, and the phosphate modified clay mineral stabilizes the zinc through the action of adsorption and precipitation so as to reduce the leaching toxicity of the zinc; in addition, different phosphate modification materials with different pH ranges are obtained by using different phosphate modification, a certain buffering and adjusting effect is achieved on the pH value of the soil, and the soil structure is improved to a certain extent, wherein the modified clay mineral is one or more of montmorillonite, bentonite or attapulgite.
The first embodiment is as follows: the zinc-contaminated soil stabilizing material mainly comprises the following components in parts by weight: 5 parts of alkaline material, 50 parts of metal oxide and 45 parts of phosphate modified material; the alkaline material is a compound of calcium oxide and magnesium oxide, the mass ratio of the calcium oxide to the magnesium oxide is 1:1, and the metal oxide is ferric oxide; the phosphate modified material is a montmorillonite material and is formed by dipping potassium dihydrogen phosphate solution and montmorillonite, wherein the mass ratio of potassium dihydrogen phosphate to montmorillonite is 1: 10.
A preparation method of a zinc-polluted soil stabilizing material is characterized by comprising the following steps:
(1) grinding the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite;
(2) fully and uniformly mixing the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite ground in the step (1);
(3) and (3) sieving the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite mixed in the step (2).
Wherein, the alkaline material, the metal oxide and the phosphate modified material in the step (1) are ground to 0.5mm, and the mixed raw materials in the step (3) are sieved to 100 meshes.
Example two: the zinc-contaminated soil stabilizing material mainly comprises the following components in parts by weight: 20 parts of alkaline material, 45 parts of metal oxide and 35 parts of phosphate modified material; wherein the alkaline material is calcium oxide and the metal oxide is aluminum oxide; the phosphate modified material is a montmorillonite material and is formed by dipping potassium dihydrogen phosphate solution and montmorillonite, wherein the mass ratio of potassium dihydrogen phosphate to montmorillonite is 1: 5.
A preparation method of a zinc-polluted soil stabilizing material is characterized by comprising the following steps:
(1) grinding the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite;
(2) fully and uniformly mixing the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite ground in the step (1);
(3) and (3) sieving the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite mixed in the step (2).
Wherein, the alkaline material, the metal oxide and the phosphate modified material in the step (1) are ground to 1mm, and the mixed raw materials in the step (3) are sieved to 100 meshes.
Example three: the zinc-contaminated soil stabilizing material mainly comprises the following components in parts by weight: 5 parts of alkaline material, 65 parts of metal oxide and 30 parts of phosphate modified material; the phosphate modified material is attapulgite and is formed by dipping a trisodium phosphate solution and the attapulgite, wherein the mass ratio of monopotassium phosphate to montmorillonite is 1: 10.
A preparation method of a zinc-polluted soil stabilizing material is characterized by comprising the following steps:
(1) grinding the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite;
(2) fully and uniformly mixing the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite ground in the step (1);
(3) and (3) sieving the compound of calcium oxide and magnesium oxide, iron oxide and phosphate modified montmorillonite mixed in the step (2).
Wherein, the alkaline material, the metal oxide and the phosphate modified material in the step (1) are ground to 1mm, and the mixed raw materials in the step (3) are sieved to 100 meshes.
The application method of the zinc-polluted soil stabilizing material comprises the following steps:
the zinc-contaminated soil stabilizing material is applied to zinc-contaminated soil in an amount of 1% to 7% of contaminated soil, for example, 1%, 2%, 3%, 5%, 7%, etc., but the application is not limited to the above values and may be any value within the range, and preferably 3% to 5%.
Further, the using method comprises the following steps: applying the zinc-contaminated soil stabilizing material on the surface of soil, mechanically mixing and stirring the soil stabilizing material and the contaminated soil uniformly, then spraying water, curing for one week, collecting a soil sample after curing, and measuring the zinc leaching content of the soil sample.
Further, the water content of the sprayed water is about 25% to 35% of the dry basis weight of the soil, and preferably about 30% of the dry basis weight of the soil.
Further, the soil zinc leaching toxicity analysis refers to the solid waste leaching toxicity leaching method horizontal oscillation method (HJ/T557-2010).
The stabilizing material is added into the zinc-contaminated soil according to the adding ratio of 3% and 5% respectively, so that the stabilizing material is fully mixed with the zinc-contaminated soil, then the water content is adjusted to 25% -30%, and the sealing maintenance is carried out for 7 d. And (3) analyzing the leaching toxicity of the soil after the maintenance by adopting a horizontal oscillation method of a solid waste leaching toxicity leaching method (HJ/T557-2010), wherein the results are as follows:
under the condition of a 3% adding ratio, the concentration of zinc is reduced by 94.5%, which shows that the material has a remarkable effect on zinc; the adding ratio is further increased, the zinc concentration of the material can be reduced to 108 ug/L, the zinc concentration is reduced by 99.8%, the change of the pH value of the soil is small, and the pH value after restoration is within a range of 6-9.
Comparative example: the comparative example provides a zinc-contaminated soil stabilizing material, which mainly comprises the following components in parts by weight: 5 parts of alkaline material, 50 parts of ferric oxide and 45 parts of montmorillonite; wherein the alkaline material is a compound of calcium oxide and magnesium oxide, the mass ratio of the calcium oxide to the magnesium oxide is 1:1, and the preparation method is the same as that of example 1.
The use method of the stabilizing material for the zinc-contaminated soil as described in comparative example 1 is adopted, the stabilizing material is added into the zinc-contaminated soil according to the adding ratios of 3% and 5% respectively, the stabilizing material and the zinc-contaminated soil are fully mixed, then the water content is adjusted to 25% -30%, and the sealing maintenance is carried out for 7 d. And (3) analyzing the leaching toxicity of the soil after the maintenance by adopting a solid waste leaching toxicity leaching method horizontal oscillation method (HJ/T557-2010), wherein the results are as follows:
under the condition of a 3% adding ratio, the concentration of zinc is reduced by 77.6%, which shows that the material has an obvious effect on zinc; the zinc concentration is reduced by 84.8 percent under the condition of 5 percent adding ratio.
It can be seen from the above examples and comparative examples that the zinc-contaminated soil stabilizing material of the present invention can greatly reduce the leaching toxicity of zinc in soil, has good effect on acid, neutral and alkaline soil, and can reduce the leaching toxicity of zinc in soil by more than 98% when the addition amount of the repairing material is 3-5% of the dry basis weight of soil.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The zinc-contaminated soil stabilizing material is characterized by comprising the following components: the modified metal oxide coating comprises an alkaline material, a metal oxide and a phosphate modified material, wherein the alkaline material is 0-50 parts, the metal oxide is 30-70 parts, and the phosphate modified material is 20-45 parts.
2. The zinc-contaminated soil stabilizing material according to claim 1, wherein the alkaline material is 5 to 35 parts, the metal oxide is 35 to 65 parts, and the phosphate modifying material is 25 to 35 parts.
3. The zinc-contaminated soil stabilizing material according to claim 2, wherein said alkaline material is a composite of one or more of calcium oxide, calcium carbonate and magnesium oxide.
4. The zinc-contaminated soil stabilizing material according to claim 3, wherein the metal oxide is a composite of one or more of iron oxide and aluminum oxide, the iron oxide is one or more of ferrous oxide, ferric oxide and ferroferric oxide, and the aluminum oxide is aluminum oxide.
5. The zinc-contaminated soil stabilizing material according to claim 4, wherein the phosphate modification material is a phosphate modified clay mineral, wherein the modified clay mineral is one or more of montmorillonite, bentonite or attapulgite.
6. The zinc-contaminated soil stabilization material according to claim 5, wherein the phosphate-modified clay mineral is impregnated with a phosphate solution and a modified clay mineral, and the phosphate and clay minerals in the phosphate-modified material have a mass ratio of 1:1 to 10.
7. The zinc-contaminated soil stabilizing material according to any one of claims 5 or 6, wherein the phosphate in said phosphate modifying material is one or more of monopotassium phosphate, dipotassium phosphate, trisodium phosphate, industrial phosphoric acid.
8. A preparation method of a zinc-polluted soil stabilizing material is characterized by comprising the following steps:
(1) grinding the alkaline material, the metal oxide and the phosphate modified material;
(2) fully and uniformly mixing the alkaline material, the metal oxide and the phosphate modified material which are ground in the step (1); and (3) sieving the alkali material, the metal oxide and the phosphate modified material mixed in the step (2).
9. The method for preparing a zinc-contaminated soil stabilizing material according to claim 8, wherein the basic material, the metal oxide and the phosphate modified material are ground to 0.5mm to 1mm in the step (1).
10. The method for preparing a zinc-contaminated soil stabilizing material according to claim 8 or 9, wherein the raw materials mixed in the step (3) are sieved to 20 to 200 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111579277.0A CN114106839A (en) | 2021-12-22 | 2021-12-22 | Zinc-polluted soil stabilizing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111579277.0A CN114106839A (en) | 2021-12-22 | 2021-12-22 | Zinc-polluted soil stabilizing material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114106839A true CN114106839A (en) | 2022-03-01 |
Family
ID=80362715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111579277.0A Pending CN114106839A (en) | 2021-12-22 | 2021-12-22 | Zinc-polluted soil stabilizing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114106839A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106244163A (en) * | 2016-08-04 | 2016-12-21 | 北京高能时代环境技术股份有限公司 | The reparation medicament of Compound Heavy Metals soil and methods for making and using same thereof |
| CN107541214A (en) * | 2016-06-28 | 2018-01-05 | 李�杰 | A kind of heavy metal stabilizer and its application method for administering industrial pollution place soil |
| CN108384549A (en) * | 2018-02-12 | 2018-08-10 | 环境保护部环境规划院 | A kind of composite drug and its application method for repairing Treatment with High Concentration Zinc contaminated soil based on large repair materials |
| CN110238185A (en) * | 2019-06-14 | 2019-09-17 | 广州润方环保科技有限公司 | A kind of repair materials and its restorative procedure of heavy-metal contaminated soil |
| CN110699084A (en) * | 2019-10-09 | 2020-01-17 | 东南大学 | Soil heavy metal pollution curing and repairing composite reagent and curing and repairing method |
-
2021
- 2021-12-22 CN CN202111579277.0A patent/CN114106839A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541214A (en) * | 2016-06-28 | 2018-01-05 | 李�杰 | A kind of heavy metal stabilizer and its application method for administering industrial pollution place soil |
| CN106244163A (en) * | 2016-08-04 | 2016-12-21 | 北京高能时代环境技术股份有限公司 | The reparation medicament of Compound Heavy Metals soil and methods for making and using same thereof |
| CN108384549A (en) * | 2018-02-12 | 2018-08-10 | 环境保护部环境规划院 | A kind of composite drug and its application method for repairing Treatment with High Concentration Zinc contaminated soil based on large repair materials |
| CN110238185A (en) * | 2019-06-14 | 2019-09-17 | 广州润方环保科技有限公司 | A kind of repair materials and its restorative procedure of heavy-metal contaminated soil |
| CN110699084A (en) * | 2019-10-09 | 2020-01-17 | 东南大学 | Soil heavy metal pollution curing and repairing composite reagent and curing and repairing method |
Non-Patent Citations (1)
| Title |
|---|
| 陶雪;杨琥;季荣;李爱民;: "固定剂及其在重金属污染土壤修复中的应用", 土壤 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108641726B (en) | Compound reagent for repairing heavy metal contaminated soil and application thereof | |
| CN103894406B (en) | The reparation of wet method detoxifcation associating stabilisation is containing the method for chromium-polluted soil | |
| CN104070056B (en) | A kind of stabilization treatment method of heavy-metal contaminated soil | |
| CN110871213B (en) | Lead-polluted soil stabilization/solidification remediation method | |
| CN105948589B (en) | A kind of method of electroplating sludge harmless treatment | |
| JPH0263591A (en) | Composition for sealing chromium, arsenic and other harmful metals in waste | |
| CN105733589A (en) | Repair composition and repair method for cyanide contaminated soil | |
| CN107418582A (en) | A kind of heavy metals immobilization stabilization agent and application method | |
| CN108059958A (en) | A kind of antimony pollution place soil stabilization renovation agent and preparation method thereof | |
| US20090209800A1 (en) | Method for stabilization of heavy metals and odor control with dicalcium phosphate dihydrate powder | |
| US20070225541A1 (en) | Method for stabilization of heavy metals and odor control with dicalcium phosphate dihydrate powder | |
| CN108611098A (en) | Handle the heavy metal deactivator and preparation method thereof of heavy-metal contaminated soil | |
| CN109652079A (en) | A kind of flyash modified method and application for mercury pollution original position soil reparation | |
| CN104774619A (en) | Immobilizing and stabilizing agent for arsenic-contaminated soil and application thereof | |
| CN112029507A (en) | Farmland arsenic-polluted soil remediation material and preparation method thereof | |
| CN112044945A (en) | Stabilizing and repairing agent and repairing method for fluoride-contaminated soil | |
| CN114106839A (en) | Zinc-polluted soil stabilizing material and preparation method thereof | |
| CN107159703A (en) | As polluted soil renovation agent and its application | |
| CN110408401A (en) | It is a kind of for repairing the curing agent and its application method of fluoride pollution soil | |
| CN110791292A (en) | Repairing agent suitable for lead-polluted soil and preparation method thereof | |
| CN109482611A (en) | The non-pollution processing method of the slugging containing pozzuolite | |
| CN113426805B (en) | Harmless treatment method for alkaline arsenate waste residues | |
| US20070213577A1 (en) | Method for stabilization of hazardous wastes with dilute acid semi-soluble dicalcium phosphate dihydrate powder | |
| CN111228711B (en) | Method for stabilizing and curing mercury-containing waste salt slag by using petrochemical waste alkali slag | |
| CN110665958B (en) | Stabilizing agent and method for repairing arsenic-polluted soil by using urban solid waste |
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 |