CN107520243A - A kind of method using bamboo willow restoration of soil polluted by heavy metal - Google Patents
A kind of method using bamboo willow restoration of soil polluted by heavy metal Download PDFInfo
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- CN107520243A CN107520243A CN201710673479.9A CN201710673479A CN107520243A CN 107520243 A CN107520243 A CN 107520243A CN 201710673479 A CN201710673479 A CN 201710673479A CN 107520243 A CN107520243 A CN 107520243A
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- Prior art keywords
- bamboo willow
- soil
- heavy metal
- restoration
- heavy
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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
- B09C1/10—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 present invention proposes a kind of method using bamboo willow restoration of soil polluted by heavy metal, comprises the following steps：Weeds on heavy-metal contaminated soil, shrub, stone debris are manually removed, activator is applied in soil, then by Soil tillage, leveling, and is properly protected around；By bamboo willow seedling transplanting on soil, irrigation soils, after bamboo willow is planted 1 ~ 2 year, bamboo willow is integrally removed, the bamboo willow of removal is then subjected to fermentation combustion gas；Caused residue, raffinate remove removing heavy metals by adding eluent after bamboo willow is fermented, caused leacheate reclaims heavy metal by adding adsorbent after removing heavy metals will be removed again, and recycle leacheate, the residue after processing, raffinate are then used for bamboo willow plantation fertilizer.The present invention can be with the heavy metal in enriching and recovering soil, while can obtain the biological fuel gas energy, and residue, raffinate after processing are used for into bamboo willow plantation fertilizer, makes resource obtain recycling with preferable economic benefit and social benefit.
Description
Technical field
It is more particularly to a kind of to utilize bamboo willow restoration of soil polluted by heavy metal the present invention relates to soil remediation Treatment process field
Method.
Background technology
In mining mineral resource, especially metallic mineral resources recovery process, barren rock mine tailings, smelting waste water, waste gas is selected to float
Heavy metal element in dirt is all the primary pollution source of environment of mining area, causes surrounding soil by polluting irrigation, atmospheric falling dust etc.
Middle content of beary metal increase, so that soil, surface water, underground water are contaminated.
At present, heavy metal pollution reparation mainly has：First, changing the existence of heavy metal, its moving in the environment is reduced
Shifting property and bioavailability；Second, absorbing heavy metal in soil using enriching plant by agronomic measures, then the plant is moved
Remove, i.e., using the absorption of plant and its rhizosphere microorganism to soil pollutant, volatilization, conversion, degraded, fixation and remove soil
The recovery technique of pollutant in earth.If the heavy metal in environment will endanger human health into plant edible part.But plant
Repairing also has the defects of certain, such as：The usual biomass of heavy metal accumulation plant is low, and growth is slow；There is selection to metal
Property, be not suitable for the improvement of various heavy combined pollution；It is gentle that the absorbability of plant heavy metal suffers from soil environment
The limitation of time condition；In addition pollutant may be come back in soil by fallen leaves.These all limit phytoremediation technology and existed
Application in terms of heavy-metal contaminated soil improvement.
In addition, the processing to plant after absorption heavy metal, and very big input, and heavy metal resources do not obtain very yet
Good recycling.
The content of the invention
It is an object of the invention to provide a kind of method using bamboo willow restoration of soil polluted by heavy metal, repaiied with solving plant
Plant growth is slow, biomass is small, long processing period in multiple heavy-metal contaminated soil technology, and at the plant of absorption heavy metal
The problems such as managing high cost, secondary pollution environment.
The technical proposal of the invention is realized in this way：
A kind of method using bamboo willow restoration of soil polluted by heavy metal, comprise the following steps：
（1）Weeds on heavy-metal contaminated soil, shrub, stone debris are manually removed；
（2）To the step（1）Remove debris after heavy-metal contaminated soil apply activator, then by Soil tillage, leveling,
And properly protected around；
（3）By bamboo willow seedling transplanting on soil, irrigation soils, after bamboo willow is planted 1 ~ 2 year, bamboo willow is integrally removed；
（4）The bamboo willow of removal is subjected to fermentation combustion gas；
（5）By the step（4）Caused residue, raffinate remove removing heavy metals by adding eluent after the fermentation of bamboo willow；
（6）By the step（5）Caused leacheate reclaims heavy metal by adding adsorbent after removing removing heavy metals, and will elution
Liquid is recycling in step（5）；
（7）The fertilizer that the residue of removing heavy metals, raffinate will be gone to be planted as bamboo willow seedling；
（8）By step（2）~（7）Repeat 2 ~ 3 times, reach safety standard to heavy metal in soil content.
Further, the step（2）Activator be ethylenediamine tetra-acetic acid, citric acid, humic acid, ammonium dihydrogen phosphate it is mixed
Compound, each component mass percent are：Ethylenediamine tetra-acetic acid：Citric acid：Humic acid：Ammonium dihydrogen phosphate=1:2~3:2~3:1.
Further, the step（2）Activator concentration is 50 ~ 200mg/kg soil.
Further, the step（3）Bamboo willow seedling comes from annual bamboo willow integral transplanting, bamboo willow seedling planting soil layer depth
20cm ~ 30cm is spent, planting density is 1 ~ 1.2m of spacing in the rows, 1 ~ 1.2m of line-spacing.
Further, the step（5）Eluent is oxalic acid, citric acid, phosphoric acid, polypropylene acetate mixture, each component
Concentration is：0.02 ~ 0.04ml/L of oxalic acid, 0.02 ~ 0.04ml/L of citric acid, phosphoric acid 0.1ml/L, polypropylene acetic acid 0.01 ~
0.02ml/L。
Further, the step（5）Eluent addition is 10 ~ 20L/kg residues, raffinate.
Further, the step（6）Adsorbent is xanthate.
Beneficial effects of the present invention are：
The heavy metal that the activator that the present invention uses be able to can not dissociate in activating soil, so as to promote the height of bamboo willow heavy metal
Effect absorbs, in addition, the bamboo willow that the present invention uses is a kind of rank vegetation, not only growth cycle is short, and heavy metal bioaccumulation efficiency
Height, and the bamboo willow of enriching heavy metal is led into everfermentation combustion gas, the heavy metal after bamboo willow is fermented in caused residue, raffinate returns
Receive, resource is obtained secondary use, improve resource utilization, and residue, raffinate can be used for bamboo willow plantation fertilizer, tool after processing
There are preferable economic benefit and social benefit.
Embodiment
In order that technical solution of the present invention is easier to understand, in conjunction with the mode of specific embodiment, to the technology of the present invention
Scheme progress is clear, is fully described by.It should be noted that embodiment described herein is only the section Example of the present invention, rather than
Whole implementations of the present invention, the embodiment only have exemplary, and its effect is only to provide understanding for auditor and the public
The more simple and clear mode of present invention, rather than the limitation to technical scheme of the present invention.The present invention is not being departed from
On the premise of design, all those of ordinary skill in the art do not make creative work with regard to thinkable other embodiment,
And other belong to protection scope of the present invention to the simple replacement of technical solution of the present invention and various change.
Embodiment 1
Certain Abandoned Land of Mine heavy-metal contaminated soil, wherein pollution factor Pb, As, Cu, Pb contain 542mg/kg, As contents
321mg/kg, Cu content 234mg/kg.
The method using bamboo willow restoration of soil polluted by heavy metal in the present embodiment, comprises the following steps：
（1）Weeds on contaminated soil, shrub, stone debris are manually removed；
（2）To the step（1）Remove the heavy-metal contaminated soil after debris and apply the activator that concentration is 50mg/kg soil, it is living
Agent each component mass ratio is：Ethylenediamine tetra-acetic acid：Citric acid：Humic acid：Ammonium dihydrogen phosphate=1:2:2:1, then soil is turned over
Plough, leveling, and properly protected around；
（3）By annual bamboo willow seedling transplanting on soil, bamboo willow seedling planting soil layer depth 20cm ~ 30cm, planting density is
1 ~ 1.2m of spacing in the rows, 1 ~ 1.2m of line-spacing, irrigation soils, after bamboo willow is planted 1 ~ 2 year, bamboo willow is integrally removed；
（4）The bamboo willow of removal is subjected to fermentation combustion gas；
（5）By the step（4）Caused residue, raffinate remove removing heavy metals by adding eluent after the fermentation of bamboo willow, wherein often
Kilogram residue, raffinate use 10L eluents, and eluent each component concentration is：Oxalic acid 0.02ml/L, citric acid 0.04ml/L, phosphorus
Sour 0.1ml/L, polypropylene acetic acid 0.01ml/L；
（6）By the step（5）Caused leacheate reclaims heavy metal by adding xanthate adsorbent after removing removing heavy metals,
And leacheate is recycling in step（5）；
（7）The fertilizer that the residue of removing heavy metals, raffinate will be gone to be planted as bamboo willow seedling；
（8）By step（2）~（7）Repeat 2 ~ 3 times, reach safety standard to heavy metal in soil content.
Soil pollution factor Pb contents are reduced to 30mg/kg after processing, and As contents are reduced to 14mg/kg, and Cu contents are reduced to 21mg/
Kg, reach safety standard.
Embodiment 2
Certain Abandoned Land of Mine heavy-metal contaminated soil, wherein pollution factor Pb, As, Cd, Pb contents 782mg/kg, As contents
351mg/kg, Cd content 6.6mg/kg.
The method using bamboo willow restoration of soil polluted by heavy metal in the present embodiment, comprises the following steps：
（1）Weeds on contaminated soil, shrub, stone debris are manually removed；
（2）To the step（1）Remove the heavy-metal contaminated soil after debris and apply the activator that concentration is 130mg/kg soil, it is living
Agent each component mass ratio is：Ethylenediamine tetra-acetic acid：Citric acid：Humic acid：Ammonium dihydrogen phosphate=1:2:3:1, then soil is turned over
Plough, leveling, and properly protected around；
（3）By annual bamboo willow seedling transplanting on soil, bamboo willow seedling planting soil layer depth 20cm ~ 30cm, planting density is
1 ~ 1.2m of spacing in the rows, 1 ~ 1.2m of line-spacing, irrigation soils, after bamboo willow is planted 1 ~ 2 year, bamboo willow is integrally removed；
（4）The bamboo willow of removal is subjected to fermentation combustion gas；
（5）By the step（4）Caused residue, raffinate remove removing heavy metals by adding eluent after the fermentation of bamboo willow, wherein often
Kilogram residue, raffinate use 15L eluents, and eluent each component concentration is：Oxalic acid 0.03ml/L, citric acid 0.03ml/L, phosphorus
Sour 0.1ml/L, polypropylene acetic acid 0.02ml/L；
（6）By the step（5）Caused leacheate reclaims heavy metal by adding xanthate adsorbent after removing removing heavy metals,
And leacheate is recycling in step（5）；
（7）The fertilizer that the residue of removing heavy metals, raffinate will be gone to be planted as bamboo willow seedling；
（8）By step（2）~（7）Repeat 2 ~ 3 times, reach safety standard to heavy metal in soil content.
Soil pollution factor Pb contents are reduced to 33mg/kg after processing, and As contents are reduced to 11mg/kg, and Cd contents are reduced to
0.8mg/kg, reach safety standard.
Embodiment 3
Certain Abandoned Land of Mine heavy-metal contaminated soil, wherein pollution factor Pb, As, Cu, Zn, Pb contents 1258mg/kg, As contain
Measure 453mg/kg, Cu contents 563 mg/kg, Zn content 757mg/kg.
The method using bamboo willow restoration of soil polluted by heavy metal in the present embodiment, comprises the following steps：
（1）Weeds on contaminated soil, shrub, stone debris are manually removed；
（2）To the step（1）Remove the heavy-metal contaminated soil after debris and apply the activator that concentration is 200mg/kg soil, it is living
Agent each component mass ratio is：Ethylenediamine tetra-acetic acid：Citric acid：Humic acid：Ammonium dihydrogen phosphate=1:3:3:1, then soil is turned over
Plough, leveling, and properly protected around；
（3）By annual bamboo willow seedling transplanting on soil, bamboo willow seedling planting soil layer depth 20cm ~ 30cm, planting density is
1 ~ 1.2m of spacing in the rows, 1 ~ 1.2m of line-spacing, irrigation soils, after bamboo willow is planted 1 ~ 2 year, bamboo willow is integrally removed；
（4）The bamboo willow of removal is subjected to fermentation combustion gas；
（5）By the step（4）Caused residue, raffinate remove removing heavy metals by adding eluent after the fermentation of bamboo willow, wherein often
Kilogram residue, raffinate use 20L eluents, and eluent each component concentration is：Oxalic acid 0.04ml/L, citric acid 0.04ml/L, phosphorus
Sour 0.1ml/L, polypropylene acetic acid 0.02ml/L；
（6）By the step（5）Caused leacheate reclaims heavy metal by adding xanthate adsorbent after removing removing heavy metals,
And leacheate is recycling in step（5）；
（7）The fertilizer that the residue of removing heavy metals, raffinate will be gone to be planted as bamboo willow seedling；
（8）By step（2）~（7）Repeat 2 ~ 3 times, reach safety standard to heavy metal in soil content.
Soil pollution factor Pb contents are reduced to 33mg/kg after processing, and As contents are reduced to 10mg/kg, and Cu contents are reduced to 26mg/
Kg, Zn content are reduced to 53mg/kg, reach safety standard.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (7)
1. a kind of method using bamboo willow restoration of soil polluted by heavy metal, comprise the following steps：
（1）Weeds on heavy-metal contaminated soil, shrub, stone debris are manually removed；
（2）To the step（1）Remove debris after heavy-metal contaminated soil apply activator, then by Soil tillage, leveling,
And properly protected around；
（3）By bamboo willow seedling transplanting on soil, irrigation soils, after bamboo willow is planted 1 ~ 2 year, bamboo willow is integrally removed；
（4）The bamboo willow of removal is subjected to fermentation combustion gas；
（5）By the step（4）Caused residue, raffinate remove removing heavy metals by adding eluent after the fermentation of bamboo willow；
（6）By the step（5）Caused leacheate reclaims heavy metal by adding adsorbent after removing removing heavy metals, and will elution
Liquid is recycling in step（5）；
（7）The fertilizer that the residue of removing heavy metals, raffinate will be gone to be planted as bamboo willow seedling；
（8）By step（2）~（7）Repeat 2 ~ 3 times, reach safety standard to heavy metal in soil content.
2. a kind of method using bamboo willow restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Step（2）Middle activator is ethylenediamine tetra-acetic acid, citric acid, humic acid, the mixture of ammonium dihydrogen phosphate, each component quality percentage
Than for：Ethylenediamine tetra-acetic acid：Citric acid：Humic acid：Ammonium dihydrogen phosphate=1:2~3:2~3:1.
3. a kind of method using bamboo willow restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Step（2）Middle activator concentration is 50 ~ 200mg/kg soil.
4. a kind of method using bamboo willow restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Step（3）Middle bamboo willow seedling comes from annual bamboo willow integral transplanting, bamboo willow seedling planting soil layer depth 20cm ~ 30cm, plants close
Spend for 1 ~ 1.2m of spacing in the rows, 1 ~ 1.2m of line-spacing.
5. a kind of method using bamboo willow restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Step（5）Middle eluent is oxalic acid, citric acid, phosphoric acid, polypropylene acetate mixture, and each component concentration is：Oxalic acid 0.02 ~
0.04ml/L, 0.02 ~ 0.04ml/L of citric acid, phosphoric acid 0.1ml/L, 0.01 ~ 0.02ml/L of polypropylene acetic acid.
6. a kind of method using bamboo willow restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Step（5）Middle eluent addition is 10 ~ 20L/kg residues, raffinate.
7. a kind of method using bamboo willow restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Step（6）Middle adsorbent is xanthate.
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Cited By (6)
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| CN108500044A (en) * | 2018-04-11 | 2018-09-07 | 上海辰山植物园 | A method of by being colonized the micro- cuttings repairing polluted soil of willow |
| CN109226220A (en) * | 2018-11-12 | 2019-01-18 | 山东城市之翼环境科技有限公司 | A kind of organic pollutant soil pollution restorative procedure |
| CN109534868A (en) * | 2018-11-14 | 2019-03-29 | 文华学院 | Device and method based on fermentation method processing various heavy |
| CN109604320A (en) * | 2019-01-24 | 2019-04-12 | 大连地拓环境科技有限公司 | A kind of work-crop rotation restoration of soil polluted by heavy metal method between energy-source plant |
| CN110814005A (en) * | 2019-11-08 | 2020-02-21 | 中冶南方都市环保工程技术股份有限公司 | Method for restoring soil polluted by heavy metal cadmium in northern farmland |
| CN111940499A (en) * | 2020-09-03 | 2020-11-17 | 长江师范学院 | Method for restoring slightly-polluted copper soil by plant-copper accelerant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500044A (en) * | 2018-04-11 | 2018-09-07 | 上海辰山植物园 | A method of by being colonized the micro- cuttings repairing polluted soil of willow |
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| CN111940499A (en) * | 2020-09-03 | 2020-11-17 | 长江师范学院 | Method for restoring slightly-polluted copper soil by plant-copper accelerant |
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