CN114147060A - Restoration method of hexavalent chromium contaminated soil - Google Patents
Restoration method of hexavalent chromium contaminated soil Download PDFInfo
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- CN114147060A CN114147060A CN202111473645.3A CN202111473645A CN114147060A CN 114147060 A CN114147060 A CN 114147060A CN 202111473645 A CN202111473645 A CN 202111473645A CN 114147060 A CN114147060 A CN 114147060A
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- contaminated soil
- hexavalent chromium
- sodium
- repairing
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- 239000002689 soil Substances 0.000 title claims abstract description 67
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 101
- 239000007924 injection Substances 0.000 claims abstract description 101
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 37
- 239000003381 stabilizer Substances 0.000 claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 238000005067 remediation Methods 0.000 claims abstract description 18
- 239000003814 drug Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 28
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 15
- 239000011790 ferrous sulphate Substances 0.000 claims description 15
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical group [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 15
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 15
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 14
- 235000013379 molasses Nutrition 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 14
- 235000010265 sodium sulphite Nutrition 0.000 claims description 14
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 14
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 14
- KRAHLZAGPKKBSW-UHFFFAOYSA-N tetrasodium;dioxidophosphanyl phosphite Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])OP([O-])[O-] KRAHLZAGPKKBSW-UHFFFAOYSA-N 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 6
- 229940079593 drug Drugs 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000575 pesticide Substances 0.000 description 12
- 230000008439 repair process Effects 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003900 soil pollution Methods 0.000 description 3
- 229910001430 chromium ion Inorganic materials 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- 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
- 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
- B09C2101/00—In situ
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (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 discloses a restoration method of hexavalent chromium contaminated soil, and solves the technical problems that the restoration cost of hexavalent chromium contaminated soil is high and the restoration effect is difficult to meet the restoration requirement in the prior art. It comprises the following steps: (1) sampling and detecting hexavalent chromium contaminated soil; (2) constructing an injection well according to the sampling detection result and adding a repairing medicament; the injection well comprises a direct pressurization injection well and a high-pressure rotary jetting well; the remediation agent comprises a reducing agent and a stabilizing agent; when the repairing agent is added, the reducing agent is added firstly, the stabilizing agent is added after the adding for 25 to 30 days, and the repairing of the polluted soil is completed after the maintaining for 25 to 30 days. The method for repairing the hexavalent chromium contaminated soil has the advantages of short soil repairing time, low repairing cost and good repairing effect.
Description
Technical Field
The invention relates to the field of soil remediation, in particular to a remediation method of hexavalent chromium contaminated soil.
Background
The national survey bulletin (2014) of soil pollution conditions shows that the soil environment conditions in China are not optimistic overall, the soil pollution in some regions is serious, the soil environment quality of cultivated land is great, and the soil environment problem of waste land in the industrial and mining industry is prominent. The artificial activities of the industrial and mining industry, the agriculture and the like and the high background value of the soil environment are main causes of soil pollution or exceeding standards.
The current heavy metal contaminated soil remediation technology mainly starts from two angles of reduction of effectiveness of heavy metals in contaminated site soil or reduction of total amount of the heavy metals. The stabilizing repair technology belongs to the former technology, which is a process of chemically modifying harmful ingredients of waste and introducing the harmful ingredients into a certain stable lattice structure, and has the advantages of strong applicability and short repair time.
The total amount of heavy metals in soil in China is related to each grade of slight, mild, moderate and severe standard exceeding, the soil with moderate and severe standard exceeding puts higher requirements on a stabilized repairing medicament, the stabilized medicament compounded by chemicals on the market at present forms a situation of mixed fish eyes due to high preparation cost, single mechanism and poor stability, and the whole effect cannot meet the repairing requirement.
Disclosure of Invention
The invention aims to provide a restoration method of hexavalent chromium contaminated soil, which aims to solve the technical problems that the restoration cost of hexavalent chromium contaminated soil is high and the restoration effect is difficult to meet the restoration requirement in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a restoration method of hexavalent chromium contaminated soil, which comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament; the injection well comprises a direct pressurization injection well and a high-pressure rotary jetting well; the remediation agent comprises a reducing agent and a stabilizing agent; when the repairing agent is added, firstly adding the reducing agent, adding the stabilizing agent after adding for 25-30 days, and maintaining for 25-30 days to finish the repairing of the polluted soil;
the reducing agent is prepared from the following raw materials in parts by weight: 50-65 parts of sodium pyrophosphite; 15-25 parts of sodium bisulfite; 10-15 parts of sodium sulfite; 8-12 parts of sodium thiosulfate; 10-20 parts of molasses;
the stabilizer is ferrous sulfate.
Further, in the step (2), the pressure of the injection pump of the direct pressurization injection well is 0.3-0.6 MPa.
Further, in the step (2), the pressure of the high-pressure jet grouting well injection pump is 30-40 MPa.
Further, in the step (2), the depth of the injection well is the depth of the polluted soil.
Further, in the step (2), the repairing agent is injected through a drug injection screen.
Further, in the step (2), the medicine injection sieve tube is a PVC tube, and the aperture is 1-2 cm.
Further, in the step (2), the reducing agent comprises the following raw materials in parts by weight: 55-60 parts of sodium pyrophosphite; 18-22 parts of sodium bisulfite; 12-14 parts of sodium sulfite; 9-10 parts of sodium thiosulfate; 12-18 parts of molasses.
Further, in the step (2), the reducing agent comprises the following raw materials in parts by weight: 58 parts of sodium pyrophosphite; 20 parts of sodium bisulfite; 13 parts of sodium sulfite; 9 parts of sodium thiosulfate; 15 parts of molasses.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the restoration method of hexavalent chromium contaminated soil provided by the invention adopts the composite medicament as the reducing agent, can quickly reduce hexavalent chromium ions in the contaminated soil into trivalent chromium, and uses the stabilizing agent to stably restore the trivalent chromium ions after reduction so as to ensure the stability of the soil restoration effect; in addition, the cost of the remediation agent is low, and the cost of the whole remediation process is also low, so that the overall cost of the remediation method for the hexavalent chromium-polluted soil is low, and the remediation method is suitable for popularization and use.
Detailed Description
Example 1:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a pesticide injection sieve pipe, wherein the pesticide injection sieve pipe is a PVC pipe and has the aperture of 2 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.5MPa, and the pressure of a high-pressure rotary blowout well injection pump is 35 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 60 parts of sodium pyrophosphite; 20 parts of sodium bisulfite; 12 parts of sodium sulfite; 10 parts of sodium thiosulfate; 15 parts of molasses;
and thirdly, adding a stabilizer after 27 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of a direct pressurization injection well injection pump is 0.5MPa, the pressure of a high-pressure jet grouting well injection pump is 35MPa, and the polluted soil is repaired after 28 days of maintenance.
Example 2
A restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a pesticide injection sieve pipe, wherein the pesticide injection sieve pipe is a PVC pipe and has the aperture of 1 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.6MPa, and the pressure of a high-pressure rotary blowout well injection pump is 40 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 65 parts of sodium pyrophosphite; 15 parts of sodium bisulfite; 15 parts of sodium sulfite; 8 parts of sodium thiosulfate; 20 parts of molasses;
and thirdly, adding a stabilizer after 30 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of the injection pump of the direct pressurized injection well is 0.6MPa, the pressure of the injection pump of the high-pressure jet grouting well is 40MPa, maintaining is carried out for 25 days, and the stabilizer is ferrous sulfate, so that the polluted soil is repaired.
Example 3:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a pesticide injection sieve pipe, wherein the pesticide injection sieve pipe is a PVC pipe and has the aperture of 2 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.3MPa, and the pressure of a high-pressure jet grouting well injection pump is 30 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 50 parts of sodium pyrophosphite; 25 parts of sodium bisulfite and 10 parts of sodium sulfite; 12 parts of sodium thiosulfate; 10 parts of molasses;
and thirdly, adding a stabilizer after 25 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of the direct pressurization injection well injection pump is 0.3MPa, the pressure of the high-pressure jet grouting well injection pump is 30MPa, maintaining is carried out for 25 days, and the stabilizer is ferrous sulfate, so that the polluted soil is repaired.
Example 4:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a pesticide injection sieve pipe, wherein the pesticide injection sieve pipe is a PVC pipe and has the aperture of 1 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.4MPa, and the pressure of a high-pressure jet grouting well injection pump is 30 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 55 parts of sodium pyrophosphite; 22 parts of sodium bisulfite; 12 parts of sodium sulfite; 10 parts of sodium thiosulfate; 12 parts of molasses;
and thirdly, adding a stabilizer after 25-30 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of a direct pressurization injection well injection pump is 0.4MPa, the pressure of a high-pressure jet grouting well injection pump is 30MPa, maintaining is carried out for 30 days, and the stabilizer is ferrous sulfate, so that the polluted soil is repaired.
Example 5:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a chemical injection sieve pipe, wherein the chemical injection sieve pipe is a PVC pipe and has the aperture of 1-2 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.5MPa, and the pressure of a high-pressure jet grouting well injection pump is 32 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 60 parts of sodium pyrophosphite; 18 parts of sodium bisulfite; 14 parts of sodium sulfite; 9 parts of sodium thiosulfate; 18 parts of molasses;
and thirdly, adding a stabilizer after 28 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of the direct pressurization injection well injection pump is 0.4MPa, the pressure of the high-pressure jet grouting well injection pump is 38MPa, maintaining is carried out for 28 days, and the stabilizer is ferrous sulfate, so that the polluted soil is repaired.
Example 6:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a pesticide injection sieve pipe, wherein the pesticide injection sieve pipe is a PVC pipe and has the aperture of 2 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.6MPa, and the pressure of a high-pressure jet grouting well injection pump is 32 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 60 parts of sodium pyrophosphite; 18 parts of sodium bisulfite; 12 parts of sodium sulfite; 12 parts of sodium thiosulfate; 12 parts of molasses;
and thirdly, adding a stabilizer after 30 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of the direct pressurization injection well injection pump is 0.6MPa, the pressure of the high-pressure jet grouting well injection pump is 32MPa, maintaining is carried out for 30 days, and the stabilizer is ferrous sulfate, so that the polluted soil is repaired.
Example 7:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a pesticide injection sieve pipe, wherein the pesticide injection sieve pipe is a PVC pipe and has the aperture of 2 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.6MPa, and the pressure of a high-pressure rotary blowout well injection pump is 35 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 55 parts of sodium pyrophosphite; 22 parts of sodium bisulfite; 13 parts of sodium sulfite; 8 parts of sodium thiosulfate; 18 parts of molasses;
and thirdly, adding a stabilizer after 25 days of adding the reducing agent, wherein the stabilizer is ferrous sulfate, the pressure of the injection pump of the direct pressurized injection well is 0.3MPa, the pressure of the injection pump of the high-pressure jet grouting well is 35MPa, and after 25 days of maintenance, the polluted soil is repaired.
Example 8:
a restoration method of hexavalent chromium contaminated soil comprises the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament;
firstly, constructing a direct pressurization injection well and a high-pressure rotary jet well, and installing a chemical injection sieve pipe, wherein the chemical injection sieve pipe is a PVC pipe and has the aperture of 1-2 cm;
adding a reducing agent, wherein the pressure of a direct pressurization injection well injection pump is 0.6MPa, and the pressure of a high-pressure rotary blowout well injection pump is 35 MPa;
the reducing agent is composed of the following raw materials in parts by weight: 58 parts of sodium pyrophosphite; 18 parts of sodium bisulfite; 12 parts of sodium sulfite; 10 parts of sodium thiosulfate; 15 parts of molasses;
thirdly, after the reducing agent is added for 25 days, adding a stabilizing agent which is ferrous sulfate, directly pressurizing the injection pump of the injection well to 0.3MPa, and pressurizing the injection pump of the high-pressure jet grouting well to 35MPa, and after curing for 30 days, completing the remediation of the polluted soil.
Second, experimental example:
the repairing effect of the hexavalent chromium contaminated soil in the examples 1 to 8 is counted, and the results are shown in the following table 1:
TABLE 1 remediation Effect of hexavalent chromium contaminated soil in examples 1 to 8
| Concentration before repair | Post-remediation concentration | Concentration before repair | Post-remediation concentration | Concentration before repair | Post-remediation concentration | |
| Example 1 | 237mg/kg | 2.1mg/kg | 57mg/kg | 1.1mg/kg | 103mg/kg | 1.6mg/kg |
| Example 2 | 219mg/kg | 1.7mg/kg | 39mg/kg | 1.3mg/kg | 99mg/kg | 1.5mg/kg |
| Example 3 | 231mg/kg | 3.2mg/kg | 41mg/kg | 1.2mg/kg | 105mg/kg | 2.2mg/kg |
| Example 4 | 163mg/kg | 1.7mg/kg | 73mg/kg | 1.5mg/kg | 87mg/kg | 1.6mg/kg |
| Example 5 | 101mg/kg | ＜0.5mg/kg | 21mg/kg | 1.5mg/kg | 92mg/kg | 1.0mg/kg |
| Example 6 | 148mg/kg | ＜0.5mg/kg | 58mg/kg | ＜0.5mg/kg | 71mg/kg | ＜0.5mg/kg |
| Example 7 | 221mg/kg | 1.5mg/kg | 11mg/kg | ＜0.5mg/kg | 113mg/kg | 1.0mg/kg |
| Example 8 | 194mg/kg | ＜0.5mg/kg | 44mg/kg | ＜0.5mg/kg | 107mg/kg | ＜0.5mg/kg |
As can be seen from Table 1, the remediation effects on the hexavalent chromium contaminated soil in the embodiments 1 to 8 of the present invention are all good, and the remediation effects on the contaminated soil with high contamination (237 mg/kg of the highest contamination) and slight contamination (11 mg/kg of the lowest contamination) are both good.
Claims (8)
1. The restoration method of hexavalent chromium contaminated soil is characterized by comprising the following steps:
(1) sampling and detecting hexavalent chromium contaminated soil;
(2) constructing an injection well according to the sampling detection result and adding a repairing medicament; the injection well comprises a direct pressurization injection well and a high-pressure rotary jetting well; the remediation agent comprises a reducing agent and a stabilizing agent; when the repairing agent is added, firstly adding the reducing agent, adding the stabilizing agent after adding for 25-30 days, and maintaining for 25-30 days to finish the repairing of the polluted soil;
the reducing agent is prepared from the following raw materials in parts by weight: 50-65 parts of sodium pyrophosphite; 15-25 parts of sodium bisulfite; 10-15 parts of sodium sulfite; 8-12 parts of sodium thiosulfate; 10-20 parts of molasses;
the stabilizer is ferrous sulfate.
2. The method for remediating hexavalent chromium-contaminated soil as set forth in claim 1, wherein, in the step (2), the pressure of the direct pressurized injection well injection pump is 0.3 to 0.6 MPa.
3. The method for remediating hexavalent chromium-contaminated soil according to claim 1, wherein the pressure of the high-pressure jet grouting well injection pump in the step (2) is 30 to 40 MPa.
4. The method for remediating hexavalent chromium-contaminated soil as claimed in claim 1, wherein in the step (2), the depth of the injection well is the depth of the contaminated soil.
5. The method of remediating hexavalent chromium-contaminated soil as set forth in claim 1, wherein said remediation agent is injected through a drug injection screen in said step (2).
6. The method of remediating hexavalent chromium-contaminated soil as claimed in claim 5, wherein, in the step (2), the chemical injection sieve tube is a PVC pipe having a pore size of 1 to 2 cm.
7. The method for remediating hexavalent chromium-contaminated soil as claimed in claim 1, wherein in the step (2), the reducing agent comprises the following raw materials in parts by weight: 55-60 parts of sodium pyrophosphite; 18-22 parts of sodium bisulfite; 12-14 parts of sodium sulfite; 9-10 parts of sodium thiosulfate; 12-18 parts of molasses.
8. The method for remediating hexavalent chromium-contaminated soil as claimed in claim 1, wherein in the step (2), the reducing agent comprises the following raw materials in parts by weight: 58 parts of sodium pyrophosphite; 20 parts of sodium bisulfite; 13 parts of sodium sulfite; 9 parts of sodium thiosulfate; 15 parts of molasses.
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| CN202111473645.3A CN114147060A (en) | 2021-11-29 | 2021-11-29 | Restoration method of hexavalent chromium contaminated soil |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637003A (en) * | 2018-04-28 | 2018-10-12 | 重庆美天环保工程有限公司 | A kind of regulation method based on 20 meters or less backfill pollutions of chromium |
| CN110343528A (en) * | 2019-07-12 | 2019-10-18 | 河南省明创环境科技有限公司 | The method repaired the medicament of chromium-polluted soil using Filling Principle and repair chromium-polluted soil using Filling Principle |
| CN111570502A (en) * | 2020-06-04 | 2020-08-25 | 杭州师范大学钱江学院 | Chromium-contaminated soil remediation method |
| CN113578945A (en) * | 2021-07-07 | 2021-11-02 | 温州大学 | Method for improving repair efficiency of molasses on chromium-contaminated soil |
-
2021
- 2021-11-29 CN CN202111473645.3A patent/CN114147060A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637003A (en) * | 2018-04-28 | 2018-10-12 | 重庆美天环保工程有限公司 | A kind of regulation method based on 20 meters or less backfill pollutions of chromium |
| CN110343528A (en) * | 2019-07-12 | 2019-10-18 | 河南省明创环境科技有限公司 | The method repaired the medicament of chromium-polluted soil using Filling Principle and repair chromium-polluted soil using Filling Principle |
| CN111570502A (en) * | 2020-06-04 | 2020-08-25 | 杭州师范大学钱江学院 | Chromium-contaminated soil remediation method |
| CN113578945A (en) * | 2021-07-07 | 2021-11-02 | 温州大学 | Method for improving repair efficiency of molasses on chromium-contaminated soil |
Non-Patent Citations (1)
| Title |
|---|
| 李晓勇，中国建材工业出版社: "《污染场地评价与修复》", 同济大学出版社 * |
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Application publication date: 20220308 |