CN113118199A - Method for in-situ remediation of heavy metal combined contaminated soil by combining plants - Google Patents
Method for in-situ remediation of heavy metal combined contaminated soil by combining plants Download PDFInfo
- Publication number
- CN113118199A CN113118199A CN202110314981.7A CN202110314981A CN113118199A CN 113118199 A CN113118199 A CN 113118199A CN 202110314981 A CN202110314981 A CN 202110314981A CN 113118199 A CN113118199 A CN 113118199A
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- China
- Prior art keywords
- heavy metal
- parts
- soil
- polluted soil
- contaminated soil
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Classifications
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- 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
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- 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
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention discloses a method for restoring heavy metal combined contaminated soil in situ by combining plants, and relates to the technical field of combined contaminated soil restoration. The invention comprises the following steps: the method comprises the following steps: adding exogenous additives such as organic matters, zeolite, phosphate and the like into the polluted soil; step two: loosening the polluted soil to uniformly mix the polluted soil with exogenous additives such as organic matters, zeolite, phosphate and the like, and then placing for 5-7 days to carry out remediation treatment on the polluted soil; step three: mixing a heavy metal ion passivator and water according to the weight ratio of 1: 15, and mixing uniformly. According to the invention, the graphite electrode is arranged, so that heavy metal pollutants can be gathered on the surface of the graphite electrode, then water near the electrode is extracted to remove the heavy metal pollutants, and meanwhile, the activity of heavy metal ions can be reduced by adding the heavy metal passivator, so that the heavy metal ions are more easily focused on the surface of the graphite electrode, and the heavy metal pollutants are removed more comprehensively and thoroughly.
Description
Technical Field
The invention belongs to the technical field of composite contaminated soil remediation, and particularly relates to a method for in-situ remediation of heavy metal composite contaminated soil by combining plants.
Background
At present, methods such as biological measures, improvement measures, agricultural measures and the like are generally adopted for repairing heavy metal polluted soil, however, the methods have the problems that the heavy metal polluted soil cannot be completely and thoroughly repaired and cannot be completely repaired when in use, so that the method is improved, and the method for repairing the heavy metal composite polluted soil in situ by combining plants is provided.
Disclosure of Invention
The invention aims to provide a method for repairing heavy metal combined polluted soil by combining plants in situ, which solves the existing problems that: when in use, the problem that the soil polluted by heavy metals cannot be comprehensively and thoroughly repaired and cannot be comprehensively repaired exists.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a method for in-situ remediation of heavy metal combined contaminated soil by combining plants, which comprises the following steps:
the method comprises the following steps: adding exogenous additives such as organic matters, zeolite, phosphate and the like into the polluted soil;
step two: loosening the polluted soil to uniformly mix the polluted soil with exogenous additives such as organic matters, zeolite, phosphate and the like, and then placing for 5-7 days to carry out remediation treatment on the polluted soil;
step three: mixing a heavy metal ion passivator and water according to the weight ratio of 1: 15, uniformly mixing, and uniformly spraying the mixed solution on the surface of the polluted soil;
step four: planting ciliate desert-grass, small-scale sedge grass and the like in the treated soil, pulling up the plants with roots after the plants are mature for 3-4 months, drying and burning;
step five: adding the incinerated ash into the solution, and then inserting a graphite electrode into the solution;
step six: applying direct current voltage on the graphite electrodes to form a direct current electric field between the two graphite electrodes, gathering heavy metal pollutants near the graphite electrodes, and then extracting water near the graphite electrodes to remove the heavy metal pollutants.
Further, the exogenous additive comprises the following components: 5-10 parts of polyacrylamide, 5-15 parts of kaolin, 5-8 parts of desulfurized gypsum, 8-10 parts of plant ash, 6-10 parts of Pengru soil and 10-20 parts of polyvinyl alcohol.
Further, the heavy metal ion passivator comprises the following components: 6-10 parts of nano graphene, 8-12 parts of titanium dioxide, 6-15 parts of organic humic acid, 7-9 parts of osthole and 40-55 parts of water, then uniformly stirring at the stirring speed of 800r/min, drying, and crushing to 100-mesh and 180-mesh to obtain the heavy metal ion passivator solution.
The invention has the following beneficial effects:
1. according to the invention, the graphite electrode is arranged, so that heavy metal pollutants can be gathered on the surface of the graphite electrode, then water near the electrode is extracted to remove the heavy metal pollutants, and meanwhile, the activity of heavy metal ions can be reduced by adding the heavy metal passivator, so that the heavy metal ions are more easily focused on the surface of the graphite electrode, and the heavy metal pollutants are removed more comprehensively and thoroughly.
2. The method is simple to operate and low in cost, can be used for repairing heavy metal composite polluted soil at low cost, and can improve the practicability and the application range of the repairing method.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a method for in-situ remediation of heavy metal combined contaminated soil by combining plants, which comprises the following steps:
the method comprises the following steps: adding exogenous additives such as organic matters, zeolite, phosphate and the like into the polluted soil;
step two: the polluted soil is scarified, so that the polluted soil is uniformly mixed with exogenous additives such as organic matters, zeolite, phosphate and the like, then the polluted soil is placed for 5 to 7 days for remediation treatment, and the soil polluted by heavy metals is uniformly mixed with exogenous additives such as organic matters, zeolite, phosphate and the like, so that the remediation efficiency of the heavy metal pollutants in the soil can be improved;
step three: mixing a heavy metal ion passivator and water according to the weight ratio of 1: 15, the mixed solution is uniformly sprayed on the surface of the polluted soil, and the heavy metal ion passivator can reduce the activity of ions in the heavy metal pollutants and is convenient for removing the heavy metal pollutants;
step four: planting ciliate desert-grass, small-scale sedge grass and the like in the treated soil, pulling up the plants with roots after the plants are mature for 3-4 months, drying and burning;
step five: adding the incinerated ash into the solution, and then inserting a graphite electrode into the solution;
step six: the direct current voltage is applied to the graphite electrodes to form a direct current electric field between the two graphite electrodes, heavy metal pollutants are gathered near the graphite electrodes, then water near the graphite electrodes is extracted to remove the heavy metal pollutants, and the heavy metal ions can be comprehensively adsorbed through the graphite electrodes, so that the heavy metal pollutants are more thoroughly adsorbed.
The exogenous additive comprises the following components: 5-10 parts of polyacrylamide, 5-15 parts of kaolin, 5-8 parts of desulfurized gypsum, 8-10 parts of plant ash, 6-10 parts of Pengru soil and 10-20 parts of polyvinyl alcohol.
The heavy metal ion passivator comprises the following components: 6-10 parts of nano graphene, 8-12 parts of titanium dioxide, 6-15 parts of organic humic acid, 7-9 parts of osthole and 40-55 parts of water, then uniformly stirring at the stirring speed of 800r/min, drying, and crushing to 100-mesh and 180-mesh to obtain the heavy metal ion passivator solution.
One specific application of this embodiment is: adding exogenous additives such as organic matters, zeolite, phosphate and the like into the polluted soil, then loosening the polluted soil to uniformly mix the polluted soil with the exogenous additives such as the organic matters, the zeolite, the phosphate and the like, then placing for 5-7 days to repair the polluted soil, and then adding a heavy metal ion passivator and water according to the weight ratio of 1: 15, uniformly mixing, uniformly spraying the mixed solution on the surface of the polluted soil, planting ciliate desert-grass, small-scale sedge grass and the like in the treated soil, pulling up the plants after the plants are mature for 3-4 months, drying and incinerating the plants, adding the incinerated ash into the solution, inserting graphite electrodes into the solution, applying direct current voltage on the graphite electrodes to form a direct current electric field between the two graphite electrodes, gathering heavy metal pollutants near the graphite electrodes, and then extracting water near the graphite electrodes to remove the heavy metal pollutants.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. A method for in-situ remediation of heavy metal combined contaminated soil by plant combination is characterized by comprising the following steps: the in-situ soil remediation method comprises the following steps:
the method comprises the following steps: adding exogenous additives such as organic matters, zeolite, phosphate and the like into the polluted soil;
step two: loosening the polluted soil to uniformly mix the polluted soil with exogenous additives such as organic matters, zeolite, phosphate and the like, and then placing for 5-7 days to carry out remediation treatment on the polluted soil;
step three: mixing a heavy metal ion passivator and water according to the weight ratio of 1: 15, uniformly mixing, and uniformly spraying the mixed solution on the surface of the polluted soil;
step four: planting ciliate desert-grass, small-scale sedge grass and the like in the treated soil, pulling up the plants with roots after the plants are mature for 3-4 months, drying and burning;
step five: adding the incinerated ash into the solution, and then inserting a graphite electrode into the solution;
step six: applying direct current voltage on the graphite electrodes to form a direct current electric field between the two graphite electrodes, gathering heavy metal pollutants near the graphite electrodes, and then extracting water near the graphite electrodes to remove the heavy metal pollutants.
2. The method for plant-combined in-situ remediation of heavy metal complex contaminated soil according to claim 1, wherein: the exogenous additive comprises the following components: 5-10 parts of polyacrylamide, 5-15 parts of kaolin, 5-8 parts of desulfurized gypsum, 8-10 parts of plant ash, 6-10 parts of Pengru soil and 10-20 parts of polyvinyl alcohol.
3. The method for plant-combined in-situ remediation of heavy metal complex contaminated soil according to claim 1, wherein: the heavy metal ion passivator comprises the following components: 6-10 parts of nano graphene, 8-12 parts of titanium dioxide, 6-15 parts of organic humic acid, 7-9 parts of osthole and 40-55 parts of water, then uniformly stirring at the stirring speed of 800r/min, drying, and crushing to 100-mesh and 180-mesh to obtain the heavy metal ion passivator solution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110314981.7A CN113118199A (en) | 2021-03-24 | 2021-03-24 | Method for in-situ remediation of heavy metal combined contaminated soil by combining plants |
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| CN202110314981.7A CN113118199A (en) | 2021-03-24 | 2021-03-24 | Method for in-situ remediation of heavy metal combined contaminated soil by combining plants |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0944442A1 (en) * | 1996-12-16 | 1999-09-29 | Monsanto Company | In-situ remediation of contaminated soils |
| CN106540959A (en) * | 2016-12-06 | 2017-03-29 | 广州富生源环保工程有限公司 | A kind of method of plant combined in-situ immobilization heavy-metal composite pollution soil |
| CN107649502A (en) * | 2017-10-09 | 2018-02-02 | 大连地拓环境科技有限公司 | A kind of method of in-situ remediation soil polluted by heavy metals |
| CN108435770A (en) * | 2018-05-07 | 2018-08-24 | 常州大学 | A kind of method of electrodynamics joint Phytoremediation of Soils Contaminated by Heavy Metals |
| CN108746191A (en) * | 2018-07-11 | 2018-11-06 | 重庆工程职业技术学院 | The method that in-situ immobilization removes heavy metal-polluted soil |
| CN110759776A (en) * | 2019-11-01 | 2020-02-07 | 上海松沅环境修复技术有限公司 | Heavy metal contaminated soil remediation agent and preparation method thereof |
| US10835938B1 (en) * | 2019-09-17 | 2020-11-17 | James Cheng-Shyong Lu | System and method for rapid reclamation of saline-sodic and heavy metal contaminated soils |
| CN112317528A (en) * | 2020-10-29 | 2021-02-05 | 盛世生态环境股份有限公司 | Method for combined remediation of heavy metal contaminated soil |
-
2021
- 2021-03-24 CN CN202110314981.7A patent/CN113118199A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0944442A1 (en) * | 1996-12-16 | 1999-09-29 | Monsanto Company | In-situ remediation of contaminated soils |
| CN106540959A (en) * | 2016-12-06 | 2017-03-29 | 广州富生源环保工程有限公司 | A kind of method of plant combined in-situ immobilization heavy-metal composite pollution soil |
| CN107649502A (en) * | 2017-10-09 | 2018-02-02 | 大连地拓环境科技有限公司 | A kind of method of in-situ remediation soil polluted by heavy metals |
| CN108435770A (en) * | 2018-05-07 | 2018-08-24 | 常州大学 | A kind of method of electrodynamics joint Phytoremediation of Soils Contaminated by Heavy Metals |
| CN108746191A (en) * | 2018-07-11 | 2018-11-06 | 重庆工程职业技术学院 | The method that in-situ immobilization removes heavy metal-polluted soil |
| US10835938B1 (en) * | 2019-09-17 | 2020-11-17 | James Cheng-Shyong Lu | System and method for rapid reclamation of saline-sodic and heavy metal contaminated soils |
| CN110759776A (en) * | 2019-11-01 | 2020-02-07 | 上海松沅环境修复技术有限公司 | Heavy metal contaminated soil remediation agent and preparation method thereof |
| CN112317528A (en) * | 2020-10-29 | 2021-02-05 | 盛世生态环境股份有限公司 | Method for combined remediation of heavy metal contaminated soil |
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Application publication date: 20210716 |