CN112574751A - Ferric-iron-containing heavy metal leaching composition, application thereof and method for repairing heavy metal soil - Google Patents
Ferric-iron-containing heavy metal leaching composition, application thereof and method for repairing heavy metal soil Download PDFInfo
- Publication number
- CN112574751A CN112574751A CN201910935973.7A CN201910935973A CN112574751A CN 112574751 A CN112574751 A CN 112574751A CN 201910935973 A CN201910935973 A CN 201910935973A CN 112574751 A CN112574751 A CN 112574751A
- Authority
- CN
- China
- Prior art keywords
- heavy metal
- soil
- leaching
- ferric
- composition
- 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
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the field of heavy metal contaminated soil remediation, and discloses a heavy metal leaching composition containing ferric iron, application thereof and a method for remediating heavy metal soil, wherein the composition comprises the following components in parts by weight: trivalent iron salts, trisodium nitrilotriacetate and sulfonate copolymers; wherein the mass ratio of the trivalent ferric salt to the trisodium nitrilotriacetate to the sulfonate copolymer is 0.1-20: 1-20: 2. the method for restoring the heavy metal soil comprises the following steps: and (3) restoring the heavy metal soil to be restored by using the heavy metal leaching composition containing ferric iron. The heavy metal leaching composition containing ferric iron provided by the invention has a remarkable effect of removing exchangeable heavy metals.
Description
Technical Field
The invention relates to the field of heavy metal contaminated soil remediation, in particular to a heavy metal leaching composition containing ferric iron, application thereof and a method for remediating heavy metal soil.
Background
With the rapid development of industry, the heavy metal soil pollution is continuously increased, land resources are damaged, and the social development process is seriously hindered. Corresponding soil remediation technologies are produced at the same time and can be roughly divided into three categories: physical repair, chemical repair, and biological repair. The physical remediation also comprises an electrodynamic method, an electric heating remediation, a vitrification technology, a frozen soil technology and the like besides the traditional methods of soil dressing, soil dumping, soil replacement and the like; the chemical remediation is that according to the soil property and the heavy metal type, a proper chemical remediation agent is selected, and the heavy metal in the soil is removed by utilizing the effects of desorption activation, oxidation reduction, chelation dissolution and the like; bioremediation is soil remediation by using the effects of heavy metal absorption, fixation, extraction and the like of plants or microorganisms.
Compared with the restoration technology of methods such as stabilization, immobilization and the like, the soil leaching method has high treatment efficiency and can fundamentally remove heavy metals in the soil so as to thoroughly eliminate the potential threat of the heavy metals. The core problem of the leaching method is the choice of the leaching agent, so that the development of a green and efficient leaching agent is very important.
CN107365585A discloses an environment-friendly cadmium metal polluted soil eluting agent and a preparation method thereof. The invention comprises the following steps: preparing 10-30 parts of natural chelating agent with the mass concentration of 1-5%, 20-40 parts of biosurfactant with the mass concentration of 0.5-5% and 0.1-1 part of pH regulator, uniformly mixing, and diluting to 100 parts to obtain the cadmium metal polluted soil eluting agent. Although the eluting agent is easy to degrade and has no secondary pollution, the removing efficiency of the eluting agent on heavy metals needs to be improved.
CN109679659A discloses a repairing agent for repairing heavy metal contaminated soil, which comprises the following raw materials in parts by weight: 3-8 parts of composite portland cement, 2-7 parts of ammonium ferric phosphate and 3-8 parts of an iron-based compound; the iron-based compound is at least one of ferric sulfate, ferric nitrate and ferric chloride. The remediation agent disclosed by the invention can passivate lead, cadmium and arsenic in the polluted soil at the same time, effectively reduce the leaching concentration of the lead, cadmium and arsenic in the passivated soil, and improve the passivation effect and the solidification remediation effect of the heavy metals in the soil, but the remediation agent is used for leaching general soil, lacks the dissolution and dispersion effects on the soil, and is difficult to achieve the purpose of removing the heavy metals in the soil.
Disclosure of Invention
The invention aims to improve the removal of exchangeable heavy metals, and provides a heavy metal leaching composition containing ferric iron, application thereof and a method for repairing heavy metal soil. The heavy metal leaching composition containing ferric iron provided by the invention has high total removal rate of heavy metals and high removal efficiency of exchangeable heavy metals.
In a first aspect, the present invention provides a ferric containing heavy metal rinse composition comprising: trivalent iron salts, trisodium nitrilotriacetate and sulfonate copolymers;
wherein the mass ratio of the trivalent ferric salt to the trisodium nitrilotriacetate to the sulfonate copolymer is 0.1-20: 1-20: 2.
the invention provides an application of the heavy metal leaching composition containing the ferric iron in heavy metal soil remediation. When the heavy metal leaching composition provided by the invention is used for repairing heavy metal soil, the removal efficiency of exchangeable heavy metals is improved, and the environment is friendly.
In a third aspect, the present invention provides a method for remediating heavy metal soil, comprising: the heavy metal soil to be repaired is repaired by adopting the ferric iron-containing heavy metal leaching composition provided by the invention.
Preferably, the method comprises: and leaching the heavy metal soil to be repaired by adopting an eluent containing the heavy metal leaching composition containing ferric iron.
The heavy metal leaching composition containing ferric iron provided by the invention not only solves the problem of low treatment efficiency of heavy metal soil leaching agents in the prior art, but also has higher removal efficiency of exchangeable heavy metals, can overcome the problem of difficult leaching of low-permeability soil, and is effective to both silt and clay. Compared with the prior art, the ferric-containing heavy metal leaching composition provided by the invention has a good repairing effect on the soil with high exchangeable-state heavy metal content.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
It was found that Fe is present in the presence of ferric salts3+Can promote the ion exchange of heavy metals on the surface of soil particles, and can generate H by hydrolysis+And dissolving partial mineral substances on the surface of the soil, so that heavy metal ions compete for surface active sites to be desorbed. The complex formed in the extraction process prevents the re-adsorption of the desorbed heavy metals and soil particles. Nitrilotriacetic acid trisodium salt can stabilize and protect Fe3+So that the composition can continuously and effectively remove heavy metals. The sulfonate copolymer can fully disperse heavy metal pollutants in a soil-liquid two-phase mixture, and is convenient to separate and remove. The combination of the trivalent ferric salt, the trisodium nitrilotriacetic acid and the sulfonate copolymer achieves better leaching effect.
In a first aspect, the present invention provides a ferric containing heavy metal rinse composition comprising: trivalent iron salts, trisodium nitrilotriacetate and sulfonate copolymers; wherein the mass ratio of the trivalent ferric salt to the trisodium nitrilotriacetate to the sulfonate copolymer is 0.1-20: 1-20: 2, more preferably 1 to 10: 3-12: 2. that is, the content of the trivalent iron salt is 1 to 200 parts by weight, more preferably 10 to 100 parts by weight, for example, 10 parts by weight, 50 parts by weight, 100 parts by weight, and any value within a range of any two of these points, based on 20 parts by weight of the sulfonate copolymer; the content of trisodium nitrilotriacetate is 10 to 200 parts by weight, more preferably 30 to 120 parts by weight, for example, 30 parts by weight, 60 parts by weight, 90 parts by weight, 120 parts by weight, and any value within a range of any two of these values. The optimized mass ratio of the trivalent ferric salt, the nitrilotriacetic acid trisodium and the sulfonate copolymer is favorable for further improving the removal efficiency of the heavy metal.
The ferric iron-containing heavy metal leaching composition provided by the invention does not contain components which can damage the soil environment, so that secondary pollution can not be caused when the ferric iron-containing heavy metal leaching composition is used for soil remediation.
The inventor of the invention finds that effective leaching for a long time can be realized by using the ferric iron-containing heavy metal leaching composition, and the leaching composition has strong permeability and small secondary pollution.
Compared with the prior art, the heavy metal leaching composition containing ferric iron provided by the invention has the advantages that the soil leaching efficiency is obviously improved, the problem of difficulty in leaching low-permeability soil can be solved, and meanwhile, the soil is not damaged.
According to the present invention, preferably, the ferric salt is selected from FeCl3、Fe(NO3)3And Fe2(SO4)3Most preferably FeCl3。
According to the invention, the trisodium nitrilotriacetate is commercially available.
According to a preferred embodiment of the present invention, the sulfonate copolymer is selected from at least one of maleic acid (anhydride)/styrene sulfonic acid copolymer, maleic acid (anhydride)/allyl sulfonic acid copolymer, acrylic acid/vinyl sulfonic acid copolymer and acrylic acid/2-methyl-2' -acrylamidopropanesulfonic acid copolymer.
In a second aspect, the invention provides an application of the heavy metal leaching composition containing ferric iron in heavy metal soil remediation. The heavy metal leaching composition containing ferric iron is particularly suitable for repairing heavy metal contaminated soil.
In a third aspect, the present invention provides a method for remediating heavy metal soil, comprising: the heavy metal soil to be repaired is repaired by using the ferric iron-containing heavy metal leaching composition provided by the invention.
The inventor of the present invention needs to explain here that, when the heavy metal soil to be repaired is repaired by using the heavy metal leaching composition containing ferric iron provided by the present invention, each component of the heavy metal leaching composition containing ferric iron may be added to the heavy metal soil to be repaired respectively, or may be added to the heavy metal soil to be repaired together in a ratio. The heavy metal soil to be repaired is treated to be repaired by using the heavy metal leaching composition containing the ferric iron no matter what form the components are added into the heavy metal soil to be repaired.
According to a specific embodiment of the present invention, the method comprises: and leaching the heavy metal soil to be repaired by adopting an eluent containing the heavy metal leaching composition containing ferric iron.
According to the method for restoring heavy metal soil provided by the invention, preferably, the concentration of the heavy metal leaching composition containing ferric iron in the leaching agent is 0.4-4.2 wt%, more preferably 0.5-2.5 wt%, for example, 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, and any value in the range formed by any two of the above points. The solvent of the eluent can be water.
According to the method for restoring heavy metal soil provided by the invention, preferably, the weight ratio of the eluting agent to the heavy metal soil to be restored (3-15): 1, preferably (7-9): 1.
according to the method for restoring the heavy metal soil provided by the invention, the leaching rate is preferably 1-5mL/min, and preferably 2.3-2.5 mL/min. The method for restoring the heavy metal soil provided by the invention has obviously higher leaching efficiency.
The specific operation of the leaching is not particularly limited in the present invention, and can be carried out according to a conventional technique in the art. The present invention will not be described herein.
According to the invention, the soil is soil in the meaning known in the art, being a mixture of minerals, organic matter, living organisms and water and air.
According to the invention, the heavy metal soil refers to soil polluted by heavy metals. Heavy metals are contained in the heavy metal soil, and the type and content of the heavy metals are not particularly limited.
According to a specific embodiment of the invention, the heavy metal soil to be repaired contains heavy metals. The method provided by the invention is suitable for removing various heavy metals, preferably, the heavy metals are at least one of nickel, arsenic, mercury and lead elements. The heavy metal leaching composition containing ferric iron is particularly suitable for removing heavy metal elements such as nickel, arsenic, mercury and lead.
The present invention will be described in detail below by way of examples.
Taking the polluted soil from a factory area of Zhejiang, removing broken stone sundries, drying, and sieving with a 40-mesh sieve to obtain heavy metal soil to be repaired, wherein the heavy metal soil to be repaired contains 3834mg/kg of nickel, 377mg/kg of arsenic, 219mg/kg of mercury and 4508mg/kg of lead; the exchangeable heavy metal content is respectively as follows: nickel 2057mg/kg, arsenic 192mg/kg, mercury 66mg/kg, lead 3814 mg/kg.
The heavy metal content in the soil is measured by an atomic fluorescence analysis method, and the morphological analysis adopts a Tessier five-step analysis method.
Trisodium nitrilotriacetate was purchased from Samson scientific Co., Ltd, Hubei; maleic acid (anhydride)/styrenesulfonic acid copolymer, acrylic acid/allylsulfonic acid copolymer, and acrylic acid ester/styrenesulfonic acid copolymer were purchased from Samsung science and technology, Inc. in Hubei; maleic acid (anhydride)/allylsulfonic acid copolymer was purchased from east chemical ltd, yozhou, yoyo county; acrylic acid/2-methyl-2' -acrylamidopropanesulfonic acid copolymers are available from Xinming Tai chemical Co., Hubei.
Example 1
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 1: 6: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.3mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 840g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 2
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 3: 4: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.4mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 960g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 3
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 5: 12: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 1080g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 4
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 7: 3: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.4mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 900g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 5
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 9: 10: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 900g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 6
The composition and the content of each component of the heavy metal leaching composition containing ferric iron are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 10: 12: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 840g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 7
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 5: 8: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.4mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 950g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 8
The composition and the content of each component of the heavy metal leaching composition containing ferric iron are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 0.1: 20: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 1080g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Example 9
The composition and the content of each component of the ferric iron-containing heavy metal leaching composition are shown in table 1, wherein the mass ratio of the ferric iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 20: 1: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 1080g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Comparative example 1
The composition and the content of each component of the heavy metal leaching composition containing the ferric iron are shown in table 1, wherein the mass ratio of the ferric iron salt to the trisodium nitrilotriacetate is 5: 16.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 1080g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Comparative example 2
The composition and the content of each component of the heavy metal leaching composition containing ferric iron are shown in table 1, wherein the mass ratio of the ferric iron salt to the sulfonate copolymer is 5: 2.
and adding water to dissolve the heavy metal leaching composition containing ferric iron and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 1080g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
Comparative example 3
The composition and the content of each component of the heavy metal leaching composition are shown in table 1, wherein the mass ratio of the trisodium nitrilotriacetate to the sulfonate copolymer is 16: 2.
and adding water to dissolve the heavy metal leaching composition and diluting to 1200g to obtain the heavy metal soil composite leaching agent.
And filling 120g of the heavy metal soil sample to be repaired into a leaching column, controlling the leaching rate to be 2.5mL/min by using a peristaltic pump, leaching the heavy metal soil to be repaired by using 1080g of the heavy metal soil composite leaching agent, taking the soil sample after leaching, drying, digesting and measuring the content of the heavy metal. The total removal of heavy metals and the removal of exchangeable heavy metals are listed in table 2.
TABLE 1
Note: the amounts of the components in Table 1 are given in "grams".
TABLE 2
From the results in table 2, it can be seen that the total removal efficiency of the heavy metals nickel, arsenic, mercury and lead and the removal efficiency of the exchangeable heavy metals are high by using the ferric iron-containing heavy metal leaching composition provided by the invention.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. A ferric containing heavy metal rinse composition comprising: trivalent iron salts, trisodium nitrilotriacetate and sulfonate copolymers;
wherein the mass ratio of the trivalent ferric salt to the trisodium nitrilotriacetate to the sulfonate copolymer is 0.1-20: 1-20: 2.
2. the composition of claim 1, wherein the ferric salt is selected from FeCl3、Fe(NO3)3And Fe2(SO4)3Preferably FeCl3。
3. The composition of claim 1 or 2, wherein the sulfonate copolymer is selected from at least one of maleic acid (anhydride)/styrene sulfonic acid copolymer, maleic acid (anhydride)/allyl sulfonic acid copolymer, acrylic acid/vinyl sulfonic acid copolymer, and acrylic acid/2-methyl-2' -acrylamidopropanesulfonic acid copolymer.
4. The composition according to any one of claims 1 to 3, wherein the mass ratio of the trivalent iron salt, the trisodium nitrilotriacetate and the sulfonate copolymer is 1-10: 3-12: 2.
5. use of the ferric metal containing heavy metal leaching composition according to any one of claims 1 to 4 for remediation of heavy metal soils.
6. A method of remediating heavy metal soils, the method comprising: the heavy metal soil to be remediated is remediated using the heavy metal leaching composition containing ferric iron of any one of claims 1 to 4.
7. The method of claim 6, wherein the method comprises: and leaching the heavy metal soil to be repaired by adopting an eluent containing the heavy metal leaching composition containing ferric iron.
8. The method according to claim 7, wherein the concentration of the ferric containing heavy metal rinsing composition in the rinsing agent is 0.4-4.2 wt%, preferably 0.5-2.5 wt%.
9. The method according to any one of claims 6 to 8, wherein the weight ratio of the eluting agent to the heavy metal soil to be remediated (3-15): 1, preferably (7-9): 1;
preferably, the elution rate is 1-5mL/min, preferably 2.3-2.5 mL/min.
10. The method according to any one of claims 6 to 9, wherein the heavy metal soil to be remediated contains heavy metals selected from at least one of nickel, arsenic, mercury and lead elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935973.7A CN112574751A (en) | 2019-09-29 | 2019-09-29 | Ferric-iron-containing heavy metal leaching composition, application thereof and method for repairing heavy metal soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935973.7A CN112574751A (en) | 2019-09-29 | 2019-09-29 | Ferric-iron-containing heavy metal leaching composition, application thereof and method for repairing heavy metal soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112574751A true CN112574751A (en) | 2021-03-30 |
Family
ID=75111113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910935973.7A Pending CN112574751A (en) | 2019-09-29 | 2019-09-29 | Ferric-iron-containing heavy metal leaching composition, application thereof and method for repairing heavy metal soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112574751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164005A (en) * | 2021-12-03 | 2022-03-11 | 盛世生态环境股份有限公司 | Special repairing agent for specifically repairing soil nickel pollution and preparation method thereof |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03190907A (en) * | 1989-12-19 | 1991-08-20 | Toagosei Chem Ind Co Ltd | Modified redox catalyst |
| US5711784A (en) * | 1995-06-06 | 1998-01-27 | University Of Maryland At College Park | Method for phytomining of nickel, cobalt and other metals from soil |
| CN1640565A (en) * | 2005-01-04 | 2005-07-20 | 华南理工大学 | Heavy metal polluted soil plant repair method |
| CN101108391A (en) * | 2007-09-06 | 2008-01-23 | 南京农业大学 | Method for improving metallic element of plants enriched soil by improving temperature of soil |
| CN101585045A (en) * | 2009-06-19 | 2009-11-25 | 华南农业大学 | Method for repairing heavy metal pollution soil by using chemical leaching and deep layer fixing combining technology |
| CN102814319A (en) * | 2012-03-01 | 2012-12-12 | 四川农业大学 | Application of nitrilotriacetic acid for reinforcing capability of siegesbeckia orientalis in restoring cadmium-polluted soil |
| CN103056158A (en) * | 2012-12-05 | 2013-04-24 | 董长勋 | Chemical leaching method for repairing heavy metal contaminated soil |
| CN103357655A (en) * | 2013-07-15 | 2013-10-23 | 南京农业大学 | Composite chemical leaching method for remediation of heavy metal contaminated soil |
| CN103865545A (en) * | 2014-03-31 | 2014-06-18 | 天津师范大学 | Method for concentrating soil heavy metals of sewage irrigation area by coalition of composite restoring agent and festuca arundinacea |
| CN103918437A (en) * | 2014-03-31 | 2014-07-16 | 天津师范大学 | Method for adopting eluting solution to restore sewage irrigation area soil heavy metal |
| CN103849403B (en) * | 2014-03-31 | 2016-06-22 | 天津师范大学 | NTA repairs, with 3-indolyl acetic acid eluent, the method that dirt fills soil grassplot heavy metal |
| CN105860982A (en) * | 2016-05-19 | 2016-08-17 | 江苏天晟环境科技有限公司 | In-situ oxidation medicine and pollution soil in-situ oxidation remediation method |
| CN106825018A (en) * | 2016-12-19 | 2017-06-13 | 东莞中科土壤科技开发有限公司 | A kind of composite chemical ELUTION METHOD of efficient restoration of soil polluted by heavy metal |
| CN103923659B (en) * | 2014-03-31 | 2017-10-10 | 天津师范大学 | The method that NTA and microbial bacterial agent reinforcing Festuca Arundinacea repair irrigating region heavy metal-polluted soil |
| CN107309266A (en) * | 2017-05-22 | 2017-11-03 | 浙江大学 | The eluent and its method of a kind of Compound Heavy Metals serious pollution soil |
-
2019
- 2019-09-29 CN CN201910935973.7A patent/CN112574751A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03190907A (en) * | 1989-12-19 | 1991-08-20 | Toagosei Chem Ind Co Ltd | Modified redox catalyst |
| US5711784A (en) * | 1995-06-06 | 1998-01-27 | University Of Maryland At College Park | Method for phytomining of nickel, cobalt and other metals from soil |
| CN1640565A (en) * | 2005-01-04 | 2005-07-20 | 华南理工大学 | Heavy metal polluted soil plant repair method |
| CN101108391A (en) * | 2007-09-06 | 2008-01-23 | 南京农业大学 | Method for improving metallic element of plants enriched soil by improving temperature of soil |
| CN101585045A (en) * | 2009-06-19 | 2009-11-25 | 华南农业大学 | Method for repairing heavy metal pollution soil by using chemical leaching and deep layer fixing combining technology |
| CN102814319A (en) * | 2012-03-01 | 2012-12-12 | 四川农业大学 | Application of nitrilotriacetic acid for reinforcing capability of siegesbeckia orientalis in restoring cadmium-polluted soil |
| CN103056158A (en) * | 2012-12-05 | 2013-04-24 | 董长勋 | Chemical leaching method for repairing heavy metal contaminated soil |
| CN103357655A (en) * | 2013-07-15 | 2013-10-23 | 南京农业大学 | Composite chemical leaching method for remediation of heavy metal contaminated soil |
| CN103865545A (en) * | 2014-03-31 | 2014-06-18 | 天津师范大学 | Method for concentrating soil heavy metals of sewage irrigation area by coalition of composite restoring agent and festuca arundinacea |
| CN103918437A (en) * | 2014-03-31 | 2014-07-16 | 天津师范大学 | Method for adopting eluting solution to restore sewage irrigation area soil heavy metal |
| CN103849403B (en) * | 2014-03-31 | 2016-06-22 | 天津师范大学 | NTA repairs, with 3-indolyl acetic acid eluent, the method that dirt fills soil grassplot heavy metal |
| CN103923659B (en) * | 2014-03-31 | 2017-10-10 | 天津师范大学 | The method that NTA and microbial bacterial agent reinforcing Festuca Arundinacea repair irrigating region heavy metal-polluted soil |
| CN105860982A (en) * | 2016-05-19 | 2016-08-17 | 江苏天晟环境科技有限公司 | In-situ oxidation medicine and pollution soil in-situ oxidation remediation method |
| CN106825018A (en) * | 2016-12-19 | 2017-06-13 | 东莞中科土壤科技开发有限公司 | A kind of composite chemical ELUTION METHOD of efficient restoration of soil polluted by heavy metal |
| CN107309266A (en) * | 2017-05-22 | 2017-11-03 | 浙江大学 | The eluent and its method of a kind of Compound Heavy Metals serious pollution soil |
Non-Patent Citations (2)
| Title |
|---|
| 夏振华 等: ""低分子量有机酸及其共聚物去除土壤重金属研究"", 《农业环境科学学报》 * |
| 李晓春 等: ""某砷污染矿区土壤清洗修复及其动力学研究"", 《环境保护科学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164005A (en) * | 2021-12-03 | 2022-03-11 | 盛世生态环境股份有限公司 | Special repairing agent for specifically repairing soil nickel pollution and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109913228A (en) | High magnetism modification biological charcoal and preparation method thereof and the application in improvement heavy metal pollution of soil | |
| CN111085537B (en) | Method for restoring heavy metal contaminated soil by using organic phosphorus and inorganic phosphorus materials | |
| CN109554180A (en) | A kind of heavy-metal contaminated soil renovation agent and restorative procedure | |
| CN109762569B (en) | Heavy metal cadmium and arsenic composite contaminated soil remediation agent and preparation method thereof | |
| WO2021031515A1 (en) | Method for stabilizing fluorides and arsenic in soil | |
| CN103464102A (en) | Porous composite adsorbing agent for removing stream substrate sludge contamination and preparation process of agent | |
| CN110451624B (en) | Permeable reaction wall material for repairing hexavalent chromium polluted underground water within wide pH range | |
| CN104056849A (en) | Method for adsorbing and treating heavy metal cadmium in soil | |
| CN103555338A (en) | Method and eluting agent for joint treatment of lead-zinc pollution by surfactant and chelating agent | |
| CN109622581B (en) | Method for removing heavy metals in polluted soil by using magnetically modified biochar | |
| CN109078972A (en) | Heavy metal contaminated soil remediation material and application method thereof | |
| Gao et al. | Remediation of metal-contaminated paddy soils by chemical washing with FeCl 3 and citric acid | |
| CN103056158A (en) | Chemical leaching method for repairing heavy metal contaminated soil | |
| CN112521949A (en) | Heavy metal soil leaching composition containing organic acid, application thereof and heavy metal soil remediation method | |
| CN109351768A (en) | A kind of method of chemical oxidation and chemical leaching renovation of heavy metal polluted soil with combined | |
| CN110484276B (en) | Method and reagent for repairing chromium-contaminated soil by coupling nano iron-based composite material with hexavalent chromium reducing bacteria | |
| CN111620530A (en) | Reducing iron-sulfur mixed colloid, preparation method and application thereof | |
| CN112574751A (en) | Ferric-iron-containing heavy metal leaching composition, application thereof and method for repairing heavy metal soil | |
| CN105498685A (en) | Water body heavy metal repairing agent and use method thereof | |
| CN107365589A (en) | A kind of heavy-metal contaminated soil solidification based on magnesia, insoluble material | |
| CN106986514B (en) | Heavy metal polluted bottom mud remediation method | |
| CN106734142B (en) | Eluting agent for eluting and repairing copper-nickel composite polluted site and using method | |
| Ramamurthy et al. | Surfactant assisted removal of Cu (II), Cd (II) and Pb (II) from contaminated soils | |
| Li et al. | Study on the remediation of Cadmium/Mercury contaminated soil by leaching: Effectiveness, conditions, and ecological risks | |
| CN112457855B (en) | Composition for repairing heavy metal soil, application thereof and method for repairing heavy metal soil |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210330 |
|
| RJ01 | Rejection of invention patent application after publication |