CN110434160A - A kind of restorative procedure of heavy-metal contaminated soil - Google Patents
A kind of restorative procedure of heavy-metal contaminated soil Download PDFInfo
- Publication number
- CN110434160A CN110434160A CN201910767994.2A CN201910767994A CN110434160A CN 110434160 A CN110434160 A CN 110434160A CN 201910767994 A CN201910767994 A CN 201910767994A CN 110434160 A CN110434160 A CN 110434160A
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- China
- Prior art keywords
- soil
- heavy
- stirring blade
- repairing agent
- metal contaminated
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The present invention relates to a kind of restorative procedures of heavy-metal contaminated soil, comprising the following steps: A, prepares soil-repairing agent；B, deep ploughing processing is carried out to soil using deep ploughing machine, soil-repairing agent is uniformly applied in the soil, the usage amount of soil-repairing agent is 30~50kg/ mus；C, primary every 2~3 days repetition step B, the dosage of the amount ratio last time soil-repairing agent of soil-repairing agent reduces 50% when repeating step B operation every time, by 2~3 completion soil remediations.The present invention can improve the deficiencies in the prior art, improve renovation agent for the adsorption effect of heavy metal, reduce the usage amount of renovation agent.
Description
Technical field
The present invention relates to environmental technology field, specially a kind of restorative procedure of heavy-metal contaminated soil.
Background technique
With the development of industrialization, heavy metal pollution is increasingly becoming a kind of primary pollution source of soil pollution.Due to a huge sum of money
Belong to element has cumulative bad in plant and human body, so the heavy metal pollution of soil has seriously the health of people
Influence.Chinese invention patent CN 105885863B proposes a kind of method repaired using medical stone to soil, due to
Medical stone has good absorption property, can carry out Adsorption to the detection device for multi metallic elements in soil.But due to system
The Percentage bound of phytic acid and medical stone is not high when standby renovation agent, causes the actual use amount of renovation agent larger.
Summary of the invention
The present invention provides a kind of restorative procedure of heavy-metal contaminated soil, is able to solve the deficiencies in the prior art, improves
Renovation agent reduces the usage amount of renovation agent for the adsorption effect of heavy metal.
To solve aforementioned technical problem, the invention proposes the following technical solutions.
A kind of restorative procedure of heavy-metal contaminated soil, comprising the following steps:
A, soil-repairing agent is prepared,
Soil-repairing agent includes the vegetation of the citric acid of 1.5~3wt%, the sodium sulfite of 4.5~6wt%, 5~10wt%
Ash, the HEDTA of 2~4wt%, the bentonite of 10~15wt%, the calcium sulfate of 1~1.5wt%, the sodium metasilicate of 0.5~2wt%, 3
The modification medical stone of the Sodium Polyacrylate of~5wt%, 25~30wt%, surplus is water；
B, deep ploughing processing is carried out to soil using deep ploughing machine, soil-repairing agent is uniformly applied in the soil, soil remediation
The usage amount of agent is 30~50kg/ mus；
C, primary every 2~3 days repetition step B, the amount ratio for repeating soil-repairing agent when step B operation every time is last
The dosage of soil-repairing agent reduces 50%, by 2~3 completion soil remediations.
Preferably, the production of the modified medical stone includes the following steps,
A1, medical stone powder is broken to 500~800 mesh；
A2, it medical stone powder is heated to 800 DEG C carries out 20~30min of calcining, it is then static to be cooled to room temperature；By medical stone
Powder is heated to 500 DEG C and carries out 40~60min of calcining, is then placed in the aqueous solution of the sodium lauryl tri(oxyethyl) sulfate containing 10wt%
Water cooling is taken out and is air-dried to room temperature；
A3, the talcum powder that 5wt% is added into maifanite powder, are made modified medical stone.
Preferably, after the talcum powder of 5wt% is added into maifanite powder, adding the sulfuric acid of 2wt% in step A3
It is ferrous.
Preferably, the deep ploughing machine includes rack, transmission shaft is installed in rack, several are installed on transmission shaft and is ploughed
Knife is equipped between two neighboring coulter and applies hopper, and transmission shaft is applied through hopper is applied and is connected with feed pipe at the top of hopper, apply material
The side wall of case and bottom are respectively arranged with first through hole, apply and are provided with stirring blade in hopper, and stirring blade is mounted on transmission shaft
On, coulter top droop is fixed with guide vane, and guide vane conveys soil to the hopper of applying of two sides.
Preferably, being provided with several on stirring blade perpendicular to the second through-hole of stirring blade, stirring blade is interior also
The blind hole for being parallel to stirring blade is set, and blind hole is connected with the second through-hole.
Preferably, symmetrical at the nozzle of feed pipe, hingedly there are two baffle, baffle and stirring blade sliding contact, baffles
It is connect between charging inside pipe wall by spring, deflector is provided with above baffle, deflector is hinged with feed pipe.
The invention has the benefit that the present invention is improved by the formula of improvement renovation agent for heavy metal element
Adsorption capacity.Processing is modified to medical stone by physics mode, improves absorption of the medical stone for heavy metal element itself
Rate realizes the purpose for being further reduced renovation agent usage amount.
During repairing to soil, the present invention utilizes coulter and stirring blade by the improvement to deep ploughing machine
Conveying effect is stirred to soil, realizes being sufficiently mixed for renovation agent and soil in hopper applying.Through-hole knot on stirring blade
Structure can realize the abundant flowing and mixing of soil and renovation agent in two directions.Baffle is controlled using the rotation of stirring blade
Folding, can make renovation agent pass through deflector concentrate with stirring blade region and more enter blind hole in, with realize reparation
Agent and soil are sufficiently mixed.
Detailed description of the invention
Fig. 1 is the structure chart of deep ploughing machine in a specific embodiment of the invention.
Fig. 2 is the structure chart that hopper is applied in a specific embodiment of the invention.
Specific embodiment
Specific function mode of the invention is discussed in detail below by specific embodiment.
A kind of restorative procedure of heavy-metal contaminated soil, comprising the following steps:
A, soil-repairing agent is prepared,
Soil-repairing agent includes the citric acid of 2wt%, the sodium sulfite of 5.5wt%, the plant ash of 5wt%, 2wt%
The bentonite of HEDTA, 15wt%, the calcium sulfate of 1wt%, the sodium metasilicate of 1.3wt%, the Sodium Polyacrylate of 5wt%, 28wt%
Modified medical stone, surplus is water；
B, deep ploughing processing is carried out to soil using deep ploughing machine, soil-repairing agent is uniformly applied in the soil, soil remediation
The usage amount of agent is 35kg/ mus；
C, primary every 3 days repetition step B, the last soil of amount ratio of soil-repairing agent when step B operation is repeated every time
The dosage of earth renovation agent reduces 50%, by 2 completion soil remediations.
The production of modified medical stone includes the following steps,
A1, medical stone powder is broken to 500 mesh；
A2, it medical stone powder is heated to 800 DEG C carries out calcining 20min, it is then static to be cooled to room temperature；By medical stone powder plus
Heat carries out calcining 60min to 500 DEG C, is then placed in the aqueous solution of the sodium lauryl tri(oxyethyl) sulfate containing 10wt% water cooling to normal
Temperature is taken out and is air-dried；
A3, the talcum powder that 5wt% is added into maifanite powder, add the ferrous sulfate of 2wt%, and modified wheat meal is made
Stone.
Referring to Fig.1-2, deep ploughing machine includes rack 1, and transmission shaft 4 is equipped in rack 1, is equipped with several on transmission shaft 4
Coulter 2 is equipped between two neighboring coulter 2 and applies hopper 3, and transmission shaft 4 is applied through hopper 3 is applied and is connected with charging at the top of hopper 3
Pipe 5, the side wall and bottom for applying hopper 3 are respectively arranged with first through hole 7, apply and are provided with stirring blade 6 in hopper 3, stirring blade 6
Be mounted on transmission shaft 4,2 top droop of coulter is fixed with guide vane 8, guide vane 8 by soil to two sides to apply hopper 3 defeated
It send.It is provided with several on stirring blade 6 perpendicular to the second through-hole 9 of stirring blade 6, is additionally provided in stirring blade 6 parallel
In the blind hole 10 of stirring blade 6, blind hole 10 is connected with the second through-hole 9.It is symmetrical at the nozzle of feed pipe 5 that hingedly there are two baffles
11, baffle 11 and 6 sliding contact of stirring blade are connected by spring 12 between 5 inner wall of baffle 11 and feed pipe, baffle 11 it is upper
Side is provided with deflector 13, and deflector 13 and feed pipe 5 are hinged.
As a comparison case by the embodiment 3 in the existing patented technology addressed in background technique, with the embodiment of the present invention into
Row comparison, it is as a result as follows.
It can thus be seen that restorative procedure of the invention can be in soil in the case where reducing renovation agent usage amount
Heavy metal element carries out more effective Adsorption.
The above is only illustrative embodiment of the invention, it is noted that for the common skill of the art
For art personnel, without departing from the basic principles of the invention, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of restorative procedure of heavy-metal contaminated soil, it is characterised in that the following steps are included:
A, soil-repairing agent is prepared,
Soil-repairing agent includes the citric acid of 1.5~3wt%, the sodium sulfite of 4.5~6wt%, the plant ash of 5~10wt%, 2
The HEDTA of~4wt%, the bentonite of 10~15wt%, the calcium sulfate of 1~1.5wt%, the sodium metasilicate of 0.5~2wt%, 3~
The modification medical stone of the Sodium Polyacrylate of 5wt%, 25~30wt%, surplus is water；
B, deep ploughing processing is carried out to soil using deep ploughing machine, soil-repairing agent is uniformly applied in the soil, soil-repairing agent
Usage amount is 30~50kg/ mus；
C, primary every 2~3 days repetition step B, the amount ratio last time soil of soil-repairing agent when step B operation is repeated every time
The dosage of renovation agent reduces 50%, by 2~3 completion soil remediations.
2. the restorative procedure of heavy-metal contaminated soil according to claim 1, which is characterized in that the modified medical stone
Production includes the following steps,
A1, medical stone powder is broken to 500~800 mesh；
A2, it medical stone powder is heated to 800 DEG C carries out 20~30min of calcining, it is then static to be cooled to room temperature；By medical stone powder plus
Heat carries out 40~60min of calcining to 500 DEG C, is then placed in water cooling in the aqueous solution of the sodium lauryl tri(oxyethyl) sulfate containing 10wt%
To room temperature, takes out and air-dry；
A3, the talcum powder that 5wt% is added into maifanite powder, are made modified medical stone.
3. the restorative procedure of heavy-metal contaminated soil according to claim 2, which is characterized in that in step A3, to wheat meal
After the talcum powder of 5wt% is added in stone powder, the ferrous sulfate of 2wt% is added.
4. the restorative procedure of heavy-metal contaminated soil according to claim 1, which is characterized in that the deep ploughing machine includes machine
Frame (1) is equipped with transmission shaft (4) in rack (1), several coulters (2), two neighboring coulter (2) is equipped on transmission shaft (4)
Between be equipped with and apply hopper (3), transmission shaft (4) is applied through hopper (3) are applied and is connected with feed pipe (5) at the top of hopper (3), apply material
The side wall of case (3) and bottom are respectively arranged with first through hole (7), apply in hopper (3) and are provided with stirring blade (6), stirring blade
(6) it is mounted on transmission shaft (4), coulter (2) top droop is fixed with guide vane (8), and guide vane (8) is by soil to two sides
Apply hopper (3) conveying.
5. the restorative procedure of heavy-metal contaminated soil according to claim 4, which is characterized in that the stirring blade (6)
On be provided with several perpendicular to the second through-hole (9) of stirring blade (6), be additionally provided in stirring blade (6) and be parallel to stirring
The blind hole (10) of blade (6), blind hole (10) are connected with the second through-hole (9).
6. the restorative procedure of heavy-metal contaminated soil according to claim 5, which is characterized in that the feed pipe (5)
It is symmetrical at nozzle that hingedly there are two baffle (11), baffle (11) and stirring blade (6) sliding contact, baffle (11) and feed pipes
(5) it is connected, is provided with deflector (13) above baffle (11), deflector (13) and feed pipe by spring (12) between inner wall
(5) hinged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910767994.2A CN110434160B (en) | 2019-08-20 | 2019-08-20 | Remediation method for heavy metal contaminated soil |
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| CN201910767994.2A CN110434160B (en) | 2019-08-20 | 2019-08-20 | Remediation method for heavy metal contaminated soil |
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| CN110434160B CN110434160B (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389897A (en) * | 2020-03-13 | 2020-07-10 | 广东东华园林绿化工程有限公司 | Soil pollution treatment method for ecological environment restoration |
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|---|---|---|---|---|
| CN2717184Y (en) * | 2004-07-14 | 2005-08-17 | 叶佐西 | Rotary cultivator |
| CN104004520A (en) * | 2014-05-07 | 2014-08-27 | 上海纺织建筑设计研究院 | Arsenic-polluted place soil restoration stabilizer |
| CN205336764U (en) * | 2016-02-04 | 2016-06-29 | 路庆学 | Farmland deep ploughing workover rig |
| CN105885863A (en) * | 2016-05-11 | 2016-08-24 | 上海立昌环境工程股份有限公司 | Heavy metal contaminated soil repair agent based on medical stone and method for repairing heavy metal soil |
| JP2018030109A (en) * | 2016-08-26 | 2018-03-01 | 公信 山▲崎▼ | Recovery method of chelating agent in soil cleaning facility which uses chelating agent |
| CN108410473A (en) * | 2018-03-19 | 2018-08-17 | 吴洪生 | A kind of farmland soil heavy metals passivation agent and process for producing same and application |
| CN208047197U (en) * | 2018-01-18 | 2018-11-06 | 河北农业大学 | One kind being used for powdered fertilizer fertilizing rotary cultivator |
-
2019
- 2019-08-20 CN CN201910767994.2A patent/CN110434160B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2717184Y (en) * | 2004-07-14 | 2005-08-17 | 叶佐西 | Rotary cultivator |
| CN104004520A (en) * | 2014-05-07 | 2014-08-27 | 上海纺织建筑设计研究院 | Arsenic-polluted place soil restoration stabilizer |
| CN205336764U (en) * | 2016-02-04 | 2016-06-29 | 路庆学 | Farmland deep ploughing workover rig |
| CN105885863A (en) * | 2016-05-11 | 2016-08-24 | 上海立昌环境工程股份有限公司 | Heavy metal contaminated soil repair agent based on medical stone and method for repairing heavy metal soil |
| JP2018030109A (en) * | 2016-08-26 | 2018-03-01 | 公信 山▲崎▼ | Recovery method of chelating agent in soil cleaning facility which uses chelating agent |
| CN208047197U (en) * | 2018-01-18 | 2018-11-06 | 河北农业大学 | One kind being used for powdered fertilizer fertilizing rotary cultivator |
| CN108410473A (en) * | 2018-03-19 | 2018-08-17 | 吴洪生 | A kind of farmland soil heavy metals passivation agent and process for producing same and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389897A (en) * | 2020-03-13 | 2020-07-10 | 广东东华园林绿化工程有限公司 | Soil pollution treatment method for ecological environment restoration |
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