CN209985990U - In-situ remediation device for shallow soil hexavalent chromium contaminated site - Google Patents
In-situ remediation device for shallow soil hexavalent chromium contaminated site Download PDFInfo
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- CN209985990U CN209985990U CN201920710233.9U CN201920710233U CN209985990U CN 209985990 U CN209985990 U CN 209985990U CN 201920710233 U CN201920710233 U CN 201920710233U CN 209985990 U CN209985990 U CN 209985990U
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Abstract
The embodiment of the utility model discloses an in-situ restoration device for a shallow soil hexavalent chromium polluted site, which comprises an isolation ring formed by annularly connecting a plurality of fence devices, the baffle plate device comprises an arc-shaped hollow clamping plate, wherein base potential guide grooves are uniformly arranged on the surface of the hollow clamping plate, the inner side surface of the hollow clamping plate is provided with a degradable foam pore layer, the hollow clamping plate positioned at the top of the degradable foam pore layer is provided with a spraying cavity, and two ends of the spraying cavity penetrate through the side wall of the hollow clamping plate and are concentrically sleeved by a plurality of isolating rings with different diameters, therefore, a plurality of layers of isolation layers are formed, different reaction media are filled in the isolation rings of the plurality of layers of isolation layers to form reaction medium layers, the pollutants chromium ions in the soil and the aqueous solution in the range of the repair area are completely repaired and fixed, and the pollutants can be blocked from continuously diffusing outwards.
Description
Technical Field
The embodiment of the utility model provides a relate to heavy metal pollution repair technical field, concretely relates to normal position prosthetic devices in shallow layer soil hexavalent chromium contaminated site.
Background
With the rapid development of economy, the process of urbanization and industrial transfer is accelerated in recent years, and the number of industrial wasteland is increased due to the relocation or leaving of heavily polluted enterprises in cities and towns. The pollution of toxic and harmful substances left by industrial waste due to the influence of original production activities not only can bring influence to the ecological environment but also can bring serious threat to the health of the public if the pollution is directly utilized.
According to survey bulletin of national soil pollution issued by environmental protection ministry and national resource ministry 2014, 4, 17, it is shown that in 775 soil points of 81 industrial fields under investigation, the standard exceeding point is 34.9%, wherein chromium is one of main pollutants, and chromium pollution in soil of industrial waste fields mainly comes from chromium industry, such as chromium salt production, metallurgy, electroplating, tanning, printing and dyeing, pharmacy, textile, pigment and the like. Chromium exists in soil mainly in two valence states of Cr (III) and Cr (VI), wherein Cr (III) is one of trace elements necessary for human health and growth of animals and plants, can assist insulin to exert biological action in a human body, and has low relative toxicity and weak mobility. Cr (VI) is one of eight chemical substances with the greatest harm to human bodies, is one of three internationally recognized carcinogenic metal substances, has high toxicity and strong mobility, can be enriched by tens of times of a food chain, enters human bodies through various ways, and can cause serious harm to human health. The chromium-polluted soil brings serious potential threats to the ecological environment and human health, so that hexavalent chromium pollution treatment and polluted soil remediation are worldwide difficult problems.
In recent years, the repair and treatment technology for chromium-polluted sites at home and abroad can be summarized into two modes:
(1) directly removing chromium remained in the soil to reduce the total amount of chromium in the soil;
(2) change the chemical form or occurrence state of chromium in soil, reduce bioavailability and mobility in environment.
The engineering measures greatly disturb the soil environment, destroy the natural properties of the soil body, have large engineering quantity and high restoration cost, and are only suitable for the restoration of the pollution in a small area; the electric restoration has high requirements on the characteristics of soil, the conductivity, the contained impurities, the water content and the like of the soil can influence the restoration effect, and the operation is complex, so the electric restoration is not widely applied to engineering; the leaching technology is a repair technology which is widely applied, but the leaching agent is easy to introduce secondary pollution; the plant restoration period is long, the efficiency is low, and the method is more suitable for restoring slightly polluted soil. Several restoration techniques based on the reduction of the total amount of chromium in soil are limited in different degrees in the practical application process, and have certain technical limitations.
The calcium silicon substance added in the in-situ passivation technology is represented by lime, the pH value of the soil is improved by utilizing the lime, the negative charge of the soil surface is increased, the heavy metal adsorption is enhanced or the metal carbonate, silicate and hydroxide precipitate is formed, and the migration property and the bioavailability of the heavy metal chromium are reduced. However, excessive use of lime can cause soil hardening, and the organic matter function is lost, so that the ecological environment of local soil can be damaged. Metals and metal oxides, such as ferrous phosphate, realize passivation and fixation of heavy metal ions mainly through ways of obligatory adsorption, non-obligatory adsorption, coprecipitation, formation of complexes in the interior and the like. But the problem of soil acidification caused by the method is not negligible, and the acidified soil can release the fixed metal ions again, so that the restoration effect is rebounded. The organic materials mainly come from biosolids, animal wastes and the like, generally contain high humified organic matters, and reduce the bioavailability of heavy metals in soil mainly by increasing the exchange capacity of soil cations and the adsorption capacity of ions, forming insoluble metal organic complexes and the like. In the process of repairing organic materials, low molecular weight organic acid (such as citric acid) and high molecular weight organic acid (such as humic acid) have a competition effect, so that the organic complexation reaction ratio of insoluble metals is greatly reduced, and meanwhile, the problem of introducing non-negligible secondary pollution (such as copper, lead, mercury, arsenic and the like which are difficult to degrade contained in pig manure and chicken manure) exists, so that the practical application effect is poor; the bioremediation technology is only suitable for slightly polluted soil, when the content of Cr (VI) in the soil is too high, the microorganism cannot play a good role, and meanwhile, the activity of the microorganism is closely related to the change of environmental conditions such as temperature, oxygen, moisture, pH and the like, and is greatly influenced by various environmental factors; the time for plant restoration is long, the extension range of the plant root system is relatively small, and the restoration efficiency for medium-high concentration hexavalent chromium pollution is low.
Disclosure of Invention
Therefore, the embodiment of the utility model provides an in situ remediation device in shallow layer soil hexavalent chromium contaminated site provides a cost is cheap relatively, repairing effect is stable, efficient, do not introduce secondary pollution's joint restoration treatment technique to medium and severe chromium contaminated soil to keep and create the device of microorganism activity environment through the relative isolation passivation reaction, fine solution the problem that the repair efficiency of well high concentration hexavalent chromium pollution is not high.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the utility model discloses embodiment provides an normal position prosthetic devices in shallow soil hexavalent chromium contaminated site, include the cage ring that connects into by a plurality of railing device annular, the railing device includes curved cavity splint, the surface of cavity splint evenly is provided with the basic potential guide slot, the interior side surface of cavity splint is provided with the degradation foam porose layer, is located to be provided with on the cavity splint at degradation foam porose layer top and sprays the chamber, just the both ends that spray the chamber run through the lateral wall of cavity splint.
As a preferred scheme of the utility model, two sides of the hollow splint are provided with half-opened matching grooves, and the matching grooves on the two sides of the hollow splint are arranged in opposite directions; and the inner side walls at the two ends of the hollow clamping plate are provided with embedded grooves.
As a preferred scheme of the utility model, base potential guide slot is inside to be extended to degradation foam porose layer, and not completely run through, and base potential guide slot extends to the intraformational surface in degradation foam hole evenly is provided with the through hole.
As an optimized proposal of the utility model, a connecting screw hole for injecting liquid into the spraying cavity is arranged in the middle of the top of any hollow splint forming the isolation ring.
As a preferred scheme of the utility model, base potential guide slot both ends are passed through the spout and are installed on the lateral wall of cavity splint, and the spout surface equidistant arrangement of cavity splint and base potential guide slot both ends junction has the screw hole that is used for fixed base potential guide slot.
The utility model discloses an embodiment has following advantage:
the utility model discloses form triple restoration reaction isolation layer, not only ensured that the pollutant chromium ion in the soil and the aqueous solution of restoration regional within range is restoreed completely fixedly, still can block the pollutant and continue the outdiffusion, the utility model discloses low cost relatively, repairing effect are stable, efficient, do not introduce secondary pollution's joint restoration and administer, through the organic functional group that utilizes passivator itself to contain to the strong chelating nature of heavy metal chromium, directly form stable organic complex state with pollutant chromium, do not have water-soluble attitude, exchange state, carbonate combination state, intermediate process such as ferromanganese oxide combination state, repairing effect is stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
FIG. 1 is a schematic diagram of the structure of an isolation ring of an in-situ remediation device for a shallow soil hexavalent chromium contaminated site according to an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides an in situ remediation device's in shallow soil hexavalent chromium contaminated site breast board device cross sectional structure sketch map.
In the figure:
1-a balustrade arrangement; 2-an isolation ring;
101-hollow splint; 102-basal potential guide grooves; 103-degrading the foam cell layer; 104-a spray chamber; 105-a mating groove; 106-an embedding groove; 107-through holes; 108-connecting screw; 109-a chute; 110-screw holes.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides an in-situ remediation device for a shallow soil hexavalent chromium contaminated site, including isolation rings 2 annularly connected by a plurality of balustrade devices 1, wherein a plurality of isolation rings 2 with different diameters are concentrically sleeved to form a multi-layer isolation layer, and different reaction media are filled in the isolation rings 2 of the multi-layer isolation layer to form a reaction medium layer;
the breast board device 1 includes curved cavity splint 101, and cavity splint 101 can adopt the iron or the stainless steel material of fixed shape, when adopting stainless steel or iron material, adopts articulated mode in the middle of the cavity splint 101 for cavity splint can be at certain angle within range internal rotation, and the connection of a plurality of cavity splint 101 then can form the cage 2 of different diameters, also can form linear isolation layer simultaneously.
Or the hollow splint 101 is made of environment-friendly and tough PET plastic, so that the hollow splint can be bent at a certain angle.
The surface of the hollow splint 101 is uniformly provided with the base potential guide grooves 102, the base potential guide grooves 102 can be arranged at different height positions on the surface of the hollow splint 101 according to the three-dimensional distribution characteristics of target soil and the horizontal and longitudinal diffusion speeds of water in the soil, so that water injection with the passivator is guided and throttled, the water content of the soil is kept, and the time for full reaction of the passivator is prolonged;
the base potential guide groove 102 extends inwards to the degraded foam hole layer 103 and does not penetrate completely, and when soil or reaction medium is backfilled, part of the soil or reaction medium is filled into the base potential guide groove 102 to form a reaction medium guide bridge between adjacent hollow splints and a soil water penetration connecting bridge.
The inboard surface of cavity splint 101 is provided with degradation foam pore layer 103, degradation foam pore layer 103 is starch and lignin base expanded material, can adsorb certain soil water injection through degradation foam pore layer 103, and the mixed liquid of soil water injection and passivator, the realization is to the absorption of mixed liquid, avoid because soil is excavated loosely, the quick downward infiltration of water runs off, the realization is to the slow release of surface soil water, can maintain soil water content for a long time, simultaneously can provide the nutrient when starch and lignin base expanded material's degradation foam pore layer 103 decomposes, improve the nutrition of soil, the hotbed that microorganism attached the collection is provided, improve the soil environment after the passivation reaction, further avoid soil secondary pollution.
Be provided with on the cavity splint 101 that is located degradation foam pore layer 103 top and spray chamber 104, and the both ends that spray chamber 104 run through the lateral wall of cavity splint 101, the surface that base potential guide slot 102 extends to in the degradation foam pore layer 103 evenly is provided with through hole 107, be provided with in the middle of the top of arbitrary one cavity splint 101 of constitution division circle 2 and to spraying the connection screw thread 108 of chamber 104 notes liquid, according to the detection to reaction medium in the soil, the accessible is connected screw thread 108 and is poured into passivation liquid into to spraying chamber 104, microorganism mixes liquid or water injection, provide simpler control mode to the subsequent processing who pollutes soil, it can form the working method of driping irrigation in cavity splint 101 to spray chamber 104, thereby can effectually carry out reaction medium's the injection and avoid too much reaction of pouring into.
The utility model discloses in after every cavity splint 101 of combination is cage washer 2, spray chamber 104 head and the tail on two adjacent cavity splint 101 and cup joint.
The two sides of the hollow clamping plate 101 are provided with half-opened matching grooves 105, the directions of the matching grooves 105 on the two sides of the hollow clamping plate 101 are opposite, and the assembling mode of the hollow clamping plate 101 can improve the integrity of the isolation ring 2;
the inner side walls of the two ends of the hollow clamping plate 101 are provided with embedded grooves 106, and a partition plate can be arranged in the hollow clamping plate 101 through the embedded grooves 106 to divide the interior of the hollow clamping plate 101 into a plurality of reaction medium chambers.
Two ends of the base potential guide groove 102 are installed on the side wall of the hollow clamp plate 101 through a sliding groove 109, and screw holes 110 for fixing the base potential guide groove 102 are arranged on the surface of the sliding groove 109 at the joint of the hollow clamp plate 101 and the two ends of the base potential guide groove 102 at equal intervals and are used for fixing the position of the base potential guide groove 102.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. The utility model provides an in situ remediation device in shallow soil hexavalent chromium contaminated site, its characterized in that includes cage (2) that connects into by a plurality of breast board device (1) ring-type, breast board device (1) includes curved cavity splint (101), the surface of cavity splint (101) evenly is provided with basic potential guide slot (102), the inboard surface of cavity splint (101) is provided with degradation foam porose layer (103), is located to be provided with on cavity splint (101) at degradation foam porose layer (103) top and sprays chamber (104), just the lateral wall that cavity splint (101) were run through at the both ends that spray chamber (104).
2. The in-situ remediation device for the shallow soil hexavalent chromium contaminated site according to the claim 1, wherein the two sides of the hollow clamping plate (101) are provided with half-opened matching grooves (105), and the directions of the matching grooves (105) on the two sides of the hollow clamping plate (101) are opposite;
the inner side walls of the two ends of the hollow clamping plate (101) are provided with embedded grooves (106).
3. The in-situ remediation device for the shallow soil hexavalent chromium contaminated site as claimed in claim 1, wherein the base potential guide groove (102) extends inwards to the degraded foam pore layer (103) and does not penetrate completely, and through holes (107) are uniformly formed in the surface of the base potential guide groove (102) extending into the degraded foam pore layer (103).
4. The in-situ remediation device for the shallow soil hexavalent chromium contaminated site as claimed in claim 1, wherein a connection screw (108) for injecting liquid into the spraying cavity is arranged in the middle of the top of any hollow clamping plate (101) forming the isolation ring (2).
5. The in-situ remediation device for the shallow soil hexavalent chromium contaminated site according to claim 1, wherein two ends of the basic potential guide groove (102) are installed on the side wall of the hollow splint (101) through sliding grooves (109), and screw holes (110) for fixing the basic potential guide groove (102) are arranged on the surface of the sliding groove (109) at the connection position of the hollow splint (101) and the two ends of the basic potential guide groove (102) at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920710233.9U CN209985990U (en) | 2019-05-17 | 2019-05-17 | In-situ remediation device for shallow soil hexavalent chromium contaminated site |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920710233.9U CN209985990U (en) | 2019-05-17 | 2019-05-17 | In-situ remediation device for shallow soil hexavalent chromium contaminated site |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110125162A (en) * | 2019-05-17 | 2019-08-16 | 北京淖尔科技有限公司 | A kind of in-situ remediation method and prosthetic device in the hexavalent chromium polluted place of thin solum |
| CN111203439A (en) * | 2020-04-02 | 2020-05-29 | 袁伟伟 | Deep neutralization regeneration device for soil with over-standard pH value |
| CN115971228A (en) * | 2023-02-08 | 2023-04-18 | 江苏诚冉环境修复工程有限公司 | Multiphase extraction soil remediation equipment |
-
2019
- 2019-05-17 CN CN201920710233.9U patent/CN209985990U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110125162A (en) * | 2019-05-17 | 2019-08-16 | 北京淖尔科技有限公司 | A kind of in-situ remediation method and prosthetic device in the hexavalent chromium polluted place of thin solum |
| CN111203439A (en) * | 2020-04-02 | 2020-05-29 | 袁伟伟 | Deep neutralization regeneration device for soil with over-standard pH value |
| CN115971228A (en) * | 2023-02-08 | 2023-04-18 | 江苏诚冉环境修复工程有限公司 | Multiphase extraction soil remediation equipment |
| CN115971228B (en) * | 2023-02-08 | 2023-09-08 | 江苏诚冉环境修复工程有限公司 | Multiphase extraction soil remediation equipment |
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Address after: 100000 No. 678, 101, floor 9, building 19, District 16, No. 188, South Fourth Ring West Road, Fengtai District, Beijing Patentee after: Beijing Guiqing Technology Co.,Ltd. Address before: 2106c1, No.9, North Fourth Ring Road West, Haidian District, Beijing Patentee before: BEIJING NAOER TECHNOLOGY Co.,Ltd. |