CN206936008U - A kind of separation layer reclaimed for heavy-metal composite pollution soil - Google Patents
A kind of separation layer reclaimed for heavy-metal composite pollution soil Download PDFInfo
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- CN206936008U CN206936008U CN201720389440.XU CN201720389440U CN206936008U CN 206936008 U CN206936008 U CN 206936008U CN 201720389440 U CN201720389440 U CN 201720389440U CN 206936008 U CN206936008 U CN 206936008U
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- Prior art keywords
- heavy
- separation layer
- soil
- metal composite
- composite pollution
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- 239000002689 soil Substances 0.000 title claims abstract description 108
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 83
- 238000000926 separation method Methods 0.000 title claims abstract description 62
- 239000002905 metal composite material Substances 0.000 title claims abstract description 55
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 38
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 38
- 239000004571 lime Substances 0.000 claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004576 sand Substances 0.000 claims abstract description 19
- 239000002734 clay mineral Substances 0.000 claims description 17
- 229910052625 palygorskite Inorganic materials 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 238000011109 contamination Methods 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 11
- 238000002955 isolation Methods 0.000 abstract description 10
- 230000009471 action Effects 0.000 abstract description 5
- 238000004375 physisorption Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000002161 passivation Methods 0.000 abstract description 4
- 229910052793 cadmium Inorganic materials 0.000 description 6
- 229910052745 lead Inorganic materials 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005067 remediation Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model provides a kind of separation layer reclaimed for heavy-metal composite pollution soil, including：White lime, loess, fine sand and activated carbon are formed by volume proportion；It is located at the top of heavy-metal composite pollution soil for the separation layer that heavy-metal composite pollution soil is reclaimed；Clean loess is equipped with the top for the separation layer reclaimed for heavy-metal composite pollution soil.The separation layer for being used for heavy-metal composite pollution soil and reclaiming that the present embodiment provides, on the one hand the heavy metal in the chemical action isolation passivation combined contamination soil of white lime is utilized, on the other hand the heavy metal in the physisorption absorption combined contamination soil of activated carbon is utilized, the heavy metal that especially white lime can not be effectively passivated, white lime can also promote the suction-operated of activated carbon simultaneously, the repairing effect of heavy metal combined contamination soil is enhanced, so as to solve the problems, such as that existing separation layer is bad to combined contamination soil repairing effect.
Description
Technical field
The utility model belongs to contaminated soil remediation technical field, more particularly to one kind is used for heavy-metal composite pollution soil
The separation layer reclaimed.
Background technology
China is mineral resources big country, and total amount is enriched, but simultaneously, excessive exploitation makes environment and ecology pay heavy generation
Valency.Due to the exploitation of metal mine, smelting, waste residue and slag stacking etc., the especially weight in slag discarded object during exploited thecoal mine
Metal (in usual mine tailing content of beary metal higher than soil, surface water, underground water hundred times are to up to ten thousand times) with mine drainage and
Rainfall enters periphery water environment or is directly entered soil, enters animal and human body finally by food chain, influences health.Cause
And the heavy metal pollution of soil problem caused by mineral exploration and exploitation is increasingly serious.
It is at present most widely peripheral doses technology for engineer applied in contaminated soil remediation technology, wherein especially with physics
Isolation method economy is optimal.Such as Application No. CN201310151146.1 and CN201320212389.7 two patents, it is public
A kind of recovery technique using tabia as separation layer is opened, the tabia is according to volume by loess, white lime and fine sand
Ratio mixing match than 5: 3: 2 forms.
But actually due to the influence of the factors such as mining methods, ore-dressing technique and ore self-characteristic, mining area is stained
Vertical distribution in soil, a variety of rather than certain Single Pollution element often be present, i.e. ore deposit land region is containing more
The compound of heavy metal species is stained soil.Passivation buffer action of the white lime to different heavy metals has selectivity in tabia, with
The increase of lime requirement and time, heavy metal Pb, Cd bio-available Zn concentration significantly reduce, and still, no matter processing time is grown
Short, a small amount of lime can't influence soil available mercury content, and can increase on the contrary using excessive lime effective in soil
Mercury content.Therefore, it is limited to the isolation effect of various heavy combined contamination soil using tabia as separation layer.
It is therefore desirable to seek a kind of separation layer that can be used in various heavy combined contamination soil Reclamation, with reality
Now the lasting of the combined contamination soil containing various heavy is effectively repaired.
Utility model content
The utility model provides a kind of separation layer reclaimed for heavy-metal composite pollution soil, to solve existing separation layer
Isolation can not effectively be synchronized to various heavies such as Hg, Pb, Cd to repair, bad to combined contamination soil repairing effect asks
Topic.
The utility model provides a kind of separation layer reclaimed for heavy-metal composite pollution soil, including：White lime, Huang
Soil, fine sand and activated carbon are formed by volume proportion；
It is located at the top of heavy-metal composite pollution soil for the separation layer that heavy-metal composite pollution soil is reclaimed；
Clean loess is equipped with the top for the separation layer reclaimed for heavy-metal composite pollution soil.
Alternatively, the volume ratio of white lime, loess, fine sand and activated carbon is：5:2:2:1.
Alternatively, the volume ratio of white lime, loess, fine sand and activated carbon is：5:1.5:2:1.5.
Preferably, the compacting factor for the separation layer reclaimed for heavy-metal composite pollution soil is 0.95, thickness 10cm.
The utility model also provides a kind of separation layer reclaimed for heavy-metal composite pollution soil, including：White lime, Huang
Soil, fine sand and clay minerals are formed by volume proportion；
It is located at the top of heavy-metal composite pollution soil for the separation layer that heavy-metal composite pollution soil is reclaimed；
Clean loess is equipped with the top for the separation layer reclaimed for heavy-metal composite pollution soil.
Alternatively, the volume ratio of white lime, loess, fine sand and clay minerals is：5:2:2:1.
Alternatively the volume ratio of white lime, loess, fine sand and clay minerals is：5:1.5:2:1.5.
Preferably, clay minerals are palygorskite.
Further, the compacting factor for the separation layer reclaimed for heavy-metal composite pollution soil is 0.95, and thickness is
10cm。
The separation layer provided by the utility model reclaimed for heavy-metal composite pollution soil, including：White lime, loess,
Fine sand and clay minerals or activated carbon are formed by volume proportion.This is used for the separation layer one that heavy-metal composite pollution soil is reclaimed
On the other hand aspect utilizes activated carbon or viscous using the heavy metal in the chemical action isolation passivation combined contamination soil of white lime
The physisorption of great soil group material further adsorbs the heavy metal in combined contamination soil, especially white lime can not be effectively blunt
The heavy metal of change, white lime can complement each other with clay minerals or activated carbon, while the presence of white lime can also promote to glue
The suction-operated of great soil group material, the repairing effect of the separation layer heavy metal combined contamination soil is greatly strengthen, so as to solve
Existing separation layer can not effectively synchronize isolation to various heavies such as Hg, Pb, Cd and repair, to combined contamination soil reparation
The problem of ineffective.
Brief description of the drawings
Fig. 1 is the soil for containing the separation layer reclaimed for heavy-metal composite pollution soil that the utility model embodiment provides
Rotating fields.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
Embodiment one
The present embodiment provides a kind of separation layer reclaimed for heavy-metal composite pollution soil.Fig. 1 is that the utility model is real
That applies example offer contains the soil layer construction for being used for the separation layer that heavy-metal composite pollution soil is reclaimed.
As shown in figure 1, the separation layer for being used for heavy-metal composite pollution soil and reclaiming that the present embodiment provides, including：Ripe stone
Ash, loess, fine sand and activated carbon are formed by volume proportion；This is used for the separation layer 2 that heavy-metal composite pollution soil is reclaimed and is located at
The top of heavy-metal composite pollution soil 1；And also spread on the top for the separation layer 2 reclaimed for heavy-metal composite pollution soil
Provided with clean loess 3.The separation layer can play the heavy metal element for preventing to be harmful in combined contamination soil 1 and pass through capillarity
Ascend into the clean loess covered thereon, namely the harmful heavy metal in isolation contaminated soil, while play reduction earthing
The effect of thickness.
The pH value of soil can be significantly improved by adding white lime in contaminated soil, so as to beneficial to the steady of heavy metal
Fixed, research is found, white lime can reach 99.79%, 99.78% and 98.5% to the stabilization efficiency of Pb, Cu, Cd in soil.
Activated carbon is a kind of porous carbon simultaneously, and bulk density is low, and specific surface area is big, therefore the harmful heavy metal in soil can also be entered
The a certain degree of Physical Absorption of row.On the one hand the separation layer 2 can utilize the chemical action isolation passivation combined pollution soil of white lime
Heavy metal in earth 1, the physisorption on the other hand having using activated carbon itself further adsorb combined contamination soil 1
In heavy metal, especially adsorb the heavy metal that can not effectively be passivated of white lime, by by white lime and activated carbon mixing match,
Chemical remediation and the physisorption for being utilized respectively both are realized and harmful heavy metal are effectively isolated, simultaneously because ripe stone
Ash can improve the pH value of contaminated soil, can further promote the suction-operated of porous mass, greatly strengthen and answered for heavy metal
The repairing effect for the separation layer heavy metal combined contamination soil that contaminated soil is reclaimed is closed, so as to solve existing separation layer pair
The problem of combined contamination soil repairing effect is bad caused by the various heavies such as Hg, Pb, Cd.
Further, through overtesting, white lime in the separation layer 2, loess, the volume ratio of fine sand and activated carbon are elected as：5:
2:2:1 or 5:1.5:2:1.5 it is advisable.
Preferably, during combined contamination soil repairing and treating Reclamation, answered for heavy-metal composite pollution soil
The compacting factor for the separation layer 2 cultivated should be 0.95, and thickness is more than or equal to 10cm, considers that economy is typically chosen in 10cm.
The present embodiment also provides another and is used for the structure of separation layer 2 that heavy-metal composite pollution soil is reclaimed, including：It is ripe
Lime, loess, fine sand and clay minerals are formed by volume proportion.Because clay minerals have, specific surface area is big, polarity, suction
The characteristics such as attached property, ion exchangeable be strong, can be realized by adding clay mineral in the isolation layer the absorption of heavy metal, cooperation,
The effect such as co-precipitation, reach the purpose of the mobility and biological effectiveness that reduce heavy metal in soil.
It is located at the top of the heavy-metal composite pollution soil 1 for the separation layer 2 that heavy-metal composite pollution soil is reclaimed；
Clean loess 3 is equipped with the top of the separation layer 2 reclaimed for heavy-metal composite pollution soil.
Preferably, palygorskite may be selected in clay minerals, and palygorskite has the inner duct and large surface area of development, chemistry
Stability is good, and adsorption capacity is strong.Research finds that palygorskite has preferable suction-operated to mercury ion.
Likewise, white lime in the separation layer 2, loess, the volume ratio of fine sand and clay minerals are elected as：5:2:2:1 or
5:1.5:2:1.5 it is advisable.And during combined contamination soil repairing and treating Reclamation, for heavy-metal composite pollution soil
The compacting factor for the separation layer 2 that earth is reclaimed should be 0.95, and thickness is more than or equal to 10cm, considers that economy is typically chosen in
10cm。
The separation layer for being used for heavy-metal composite pollution soil and reclaiming that the present embodiment provides, including：It is white lime, loess, thin
Husky and clay minerals are formed by volume proportion, and this is used for the separation layer that heavy-metal composite pollution soil is reclaimed and is laid on compound dirt
The top of soil is contaminated, and clean loess is re-layed on the top of the separation layer reclaimed for heavy-metal composite pollution soil.
On the one hand the present embodiment is passivated the heavy metal in combined contamination soil using the chemical action isolation using white lime, on the other hand
Heavy metal in the physisorption absorption combined contamination soil having using clay mineral itself, especially adsorbs white lime
The heavy metal that can not be effectively passivated, simultaneously because white lime can improve the pH value of contaminated soil, it can further promote clay mineral
Suction-operated, enhance the reparation for the separation layer heavy metal combined contamination soil reclaimed for heavy-metal composite pollution soil
Effect, it is bad so as to solve existing separation layer combined contamination soil repairing effect to caused by the various heavies such as Hg, Pb, Cd
The problem of.
Claims (9)
- A kind of 1. separation layer reclaimed for heavy-metal composite pollution soil, it is characterised in that including：White lime, loess, fine sand Formed with activated carbon by volume proportion；The top for being located at the heavy-metal composite pollution soil for the separation layer that heavy-metal composite pollution soil is reclaimed；Clean loess is equipped with the top of the separation layer reclaimed for heavy-metal composite pollution soil.
- 2. the separation layer according to claim 1 reclaimed for heavy-metal composite pollution soil, it is characterised in that the Huang Soil, white lime, the volume ratio of fine sand and activated carbon are：5:2:2:1.
- 3. the separation layer according to claim 1 reclaimed for heavy-metal composite pollution soil, it is characterised in that the Huang Soil, white lime, the volume ratio of fine sand and activated carbon are：5:1.5:2:1.5.
- 4. according to any described separation layer for being used for heavy-metal composite pollution soil and reclaiming of claims 1 to 3, its feature exists In the compacting factor of the separation layer reclaimed for heavy-metal composite pollution soil is 0.95, thickness 10cm.
- A kind of 5. separation layer reclaimed for heavy-metal composite pollution soil, it is characterised in that including：White lime, loess, fine sand Formed with clay minerals by volume proportion；The top for being located at the heavy-metal composite pollution soil for the separation layer that heavy-metal composite pollution soil is reclaimed；Clean loess is equipped with the top of the separation layer reclaimed for heavy-metal composite pollution soil.
- 6. the separation layer according to claim 5 reclaimed for heavy-metal composite pollution soil, it is characterised in that the Huang Soil, white lime, the volume ratio of fine sand and clay minerals are：5:2:2:1.
- 7. the separation layer according to claim 5 reclaimed for heavy-metal composite pollution soil, it is characterised in that the Huang Soil, white lime, the volume ratio of fine sand and clay minerals are：5:1.5:2:1.5.
- 8. the separation layer according to claim 5 reclaimed for heavy-metal composite pollution soil, it is characterised in that described viscous Great soil group mineral are palygorskite.
- 9. according to any described separation layer for being used for heavy-metal composite pollution soil and reclaiming of claim 5~8, its feature exists In the compacting factor of the separation layer reclaimed for heavy-metal composite pollution soil is 0.95, thickness 10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389440.XU CN206936008U (en) | 2017-04-12 | 2017-04-12 | A kind of separation layer reclaimed for heavy-metal composite pollution soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389440.XU CN206936008U (en) | 2017-04-12 | 2017-04-12 | A kind of separation layer reclaimed for heavy-metal composite pollution soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190161933A1 (en) * | 2017-11-30 | 2019-05-30 | Mining Development & Environmental Management Of Shaanxi Provincial Land Engineering Construction | Isolation and restoration method for compound contaminated soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190161933A1 (en) * | 2017-11-30 | 2019-05-30 | Mining Development & Environmental Management Of Shaanxi Provincial Land Engineering Construction | Isolation and restoration method for compound contaminated soil |
| US10526759B2 (en) * | 2017-11-30 | 2020-01-07 | Mining Development And Environmental Management Of Shaanxi Provincial Land Engineering Construction Group Co., Ltd. | Isolation and restoration method for compound contaminated soil |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180130 |