CN108947155A - A kind of restorative procedure based on river sediment in-situ covering - Google Patents
A kind of restorative procedure based on river sediment in-situ covering Download PDFInfo
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- CN108947155A CN108947155A CN201810907866.9A CN201810907866A CN108947155A CN 108947155 A CN108947155 A CN 108947155A CN 201810907866 A CN201810907866 A CN 201810907866A CN 108947155 A CN108947155 A CN 108947155A
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- bed mud
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of restorative procedures based on river sediment in-situ covering, comprising: carries out the covering in situ of bed mud: choosing bed mud covering material and be covered on the surface layer mud scum of high pollution, physics separates polluted bed mud with overlying water；It introduces a fine variety resistant emergent aquactic plant: resistant emergent aquactic plant is introduced a fine variety on capped bed mud, to inhibit the discharged pollutant of bed mud and repair to overlying water.The present invention can be physically separated contaminated bed mud with water body and come, and effectively controlling contaminated bed mud becomes suspended matter polluted-water again, and can speed up the natural biology degradation of oxygen-free environment after covering.
Description
Technical field
The invention belongs to environment remediation fields, and in particular to a kind of restorative procedure based on river sediment in-situ covering.
Background technique
River bottom mud is the place of many environmental contaminants self-purifications, and pollutant is adsorbed by aquatic particle, complexing, wads a quilt with cotton
Solidifying, sedimentation is to be deposited in bed mud.But river bottom mud is also the important sources of secondary pollution of water, shows as working as environment
When condition changes, it is attracted to the effects of polluter in bed mud is by desorption, dissolution, biological decomposition, water phase can be returned to simultaneously
Generate secondary pollution.
The current reparation in relation to polluted bed mud is broadly divided into two major classes: showering technology and based technique for in-situ remediation.Wherein,
Bed mud showering technology, which is primarily referred to as bed mud, dredges to complete and dredge and completes the processing of bed mud.In-situ sediment remediation technology mainly passes through pollution
The soverlay technique in situ of bed mud is realized, i.e., by making to pollute in one or more layers cleaning covering material of polluted bed mud surface laying
Bed mud is isolated with upper water column, to prevent migration of the pollutant to water body in bed mud.Based technique for in-situ remediation required cost is low, can
To avoid sediments re-suspension during Sediment Dredging to the secondary dirt in the pollution of water body and Dredged bed mud conveying and treatment process
Dye problem, and do not need additional processing disposition place.
Currently used bed mud covering material includes clean deposition object, sand and gravel etc..It is external to sink to by cleaning
The bed mud covering system that product object, sand and gravel are constituted has done a large amount of research, and has carried out many successful applications.But
It is that, due to needing to add covering material to water body, will increase the volume of substrate in water body, reduce the water of overlying water in water body
It is deep；And in the faster waters of water body flow, covering material is easily washed in a pan erosion after bed mud covering, to influence the effect of covering.
Muddy water is generallyd use with the thinking controlled, in river bottom mud after covering in situ, still based on current river regulation
It needs to repair overlying water.
Summary of the invention
For deficiency existing for existing based technique for in-situ remediation, it is former based on river bottom mud that the purpose of the present invention is to provide one kind
The restorative procedure of position covering, can effectively control the nutritive salt such as Nitrogen In Sediment, phosphorus and enter water body.
In order to achieve the goal above, existing be described in detail technical solution of the present invention.
A kind of restorative procedure based on river sediment in-situ covering, includes the following steps:
S100: carrying out the covering in situ of bed mud: choosing bed mud covering material and be covered on the surface layer mud scum of high pollution, physics
Polluted bed mud is separated with overlying water；
S200: it introduces a fine variety resistant emergent aquactic plant: resistant emergent aquactic plant is introduced a fine variety on capped bed mud, to inhibit bed mud to be released
It puts pollutant and overlying water is repaired.
Preferably, the component and weight percent of the bed mud covering material are as follows: fine sand gravel 30%-80%, bentonite
20%-50%, organic polymer 2%-10%.
Preferably, the bed mud covering material can form high-quality elastic layer after hydrolysis expansion, for inhibiting water body bottom
Release of the pollutant to overlying water in mud.
Preferably, the cladding thickness of the bed mud covering material is 5-10cm.
Preferably, after the bed mud covering material completes covering to bed mud, it is able to maintain the ecological environment of bed mud and water body.
Preferably, the organic polymer include one of acrylic resin, polychloroprene latex, organosilicon, polyurethane or
Person is several.
Preferably, the resistant emergent aquactic plant includes reed, canna, the stem or leaf of cattail, lotus, Chinese celery, wild rice stem Xun, lotus, cattail.
Bring of the present invention has the beneficial effect that
1, covering material has the advantages that low permeability, chemical stability and corrosion resistance are strong, can be using its characteristic
Contaminated bed mud is separated with water body physics, and effectively controlling contaminated bed mud becomes suspended matter contaminant water again
Body, and accelerate the natural biology degradation of oxygen-free environment after covering.
2, the bed mud after covering can maintain preferably to store fertilizer, fertilizer conservation and feeder capability as matrix, this is easy to operate, economical
It is feasible；
3, emergent aquactic plant increases river while purifying overlying water, improving polluted river channel remedying sludge efficiency again
Landscape ornamental value.
Detailed description of the invention
Fig. 1 is the bed mud covering material structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the overall structure diagram of the embodiment of the present invention.
Wherein, label is described as follows in figure: bed mud -1, covering material -2, overlying water -3, emergent aquactic plant -4.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawings and examples, example is served only for explaining this
Patent of invention is not intended to limit the scope of protection of the patent of the present invention.
In one embodiment, the present invention provides a kind of restorative procedure based on river sediment in-situ covering, including as follows
Step:
S100: carrying out the covering in situ of bed mud: choosing bed mud covering material and be covered on the surface layer mud scum of high pollution, physics
Polluted bed mud is separated with overlying water；
S200: it introduces a fine variety resistant emergent aquactic plant: resistant emergent aquactic plant is introduced a fine variety on capped bed mud, to inhibit bed mud to be released
It puts pollutant and overlying water is repaired.
The present invention, on the one hand can be contaminated bed mud and upper water by the way that covering material to be covered on contaminated bed mud
Body physics separate, and causes water pollution so as to effectively prevent contaminated bed mud to be mixed into water body as suspended matter；
On the other hand, bed mud is coated after cover material is separated with upper water column and forms closed oxygen-free environment, can speed up contained in bed mud
The degradation of natural biology, after the completion of degradation, bed mud can serve as the matrix for having certain fertility and be used.Complete bottom
After mud covering, in order to inhibit the pollutant part discharged in bed mud to enter water body by bed mud covering material, need to introduce a fine variety resistance to
Dirty emergent aquactic plant, absorbs pollutant, to achieve the purpose that water body purification.
In one embodiment, in the specific implementation of step S100, in conjunction with shown in Fig. 1, Fig. 2, the present invention chooses weight
Based on the fine sand gravel of the uniform particle sizes of percentage 30%-80%, by the bentonite and weight of weight percent 20%-50%
The substance of the organic polymer of percentage 2%-10% after evenly mixing is stirred with fine sand gravel, mixes, and bed mud can be obtained
Covering material 2.Bed mud covering material 2 has the advantages that low permeability, chemical stability and corrosion resistance are strong, swollen hydrolyzing
Uniform, sticky, non-penetrative a high-quality elastic layer can be formed after swollen, to pollutant in Sediments to overlying water
Control action is played in the release of body 3.In addition, being sought in bed mud covering material 2 containing microorganism similar with bed mud and water plant
Base is supported, itself can provide the parent and nutritional ingredient of attachment, bed mud quilt originally for micropopulation and water plant root
After being completely covered, new water flow can be brought and original same water nutrition substance and bed mud substance, one new micro- life of formation
Object ecological environment and aquatile ecology group, coating will not change bed mud and the original ecological environment of water body.Therefore, pass through
Bed mud is covered, effectively contaminated bed mud can be physically separated with water body and come, contaminated bed mud is controlled
As suspended matter polluted-water again, and accelerate the natural biology degradation of oxygen-free environment after covering.
In one embodiment, the organic polymer in the present invention is acrylic resin, polychloroprene latex, organosilicon, poly- ammonia
One of ester several mixes in any proportion；Meanwhile organic polymer be also possible to it is other；Organic polymer has good
Good water-fast, corrosion resistance, anti-permeability performance is superior, and cohesive force is strong, effectively bed mud and upper water column can be isolated, and not
Vulnerable to the erosion of pollutant in bed mud, so as to guarantee the cleannes of upper water column.
In one embodiment, the thickness for the covering material being covered on bed mud in the present invention is preferably 5-10cm.
In one embodiment, in the specific implementation of step S200, as shown in Fig. 2, the present invention is in the original for completing bed mud 1
After the covering of position, overlying water is repaired by introducing a fine variety resistant emergent aquactic plant 4.For the selection of resistant emergent aquactic plant 4, preferentially examine
Consider well developed root system, suitable for the land race of local climate condition and anti-pollution bed mud, as reed, canna, the stem or leaf of cattail, lotus, Chinese celery,
Wild rice stem Xun, lotus, cattail etc. can carry out screening varieties in the specific implementation process in advance, thus filter out the speed of growth it is fast,
Resistance to pollutants in sediments, biomass are big and have both one or more kinds of aquatic plant species of certain ornamental value.
The release of Nitrogen In Sediment and phosphorus can be effectively controlled using bed mud covering restorative procedure of the invention, while increase river
The landscape ornamental value in road.Show bed mud covering method of the present invention under the conditions of simulated experiment to bed mud and upper by experimental study
The repairing effect of water is covered, testing result is as shown in table 1, table 2:
If the bed mud index of correlation comparative situation in 1 embodiment of table after the blank combination experiment group dry-cure time
If blank group and the overlying water index of correlation comparative situation after the experimental group dry-cure time in 2 embodiment of table
Wherein, OPR refers to oxidation-reduction potential；AVS refers to acid volatile sulfide acid object in water body；TOC refers to total organic in water body
Carbon content；TN refers to Water element total content；TP refers to phosphorus element content in water body；DO refers to the dissolved oxygen content in water body.
By the data of Tables 1 and 2 it can be seen that bed mud pH value changes not after (1) addition covering material and emergent aquactic plant
Greatly；(2) oxidation-reduction potential of bed mud is remarkably enhanced, and illustrates that the oxygen content of bed mud improves a lot；(3) water body
The numerical value of middle ammonia nitrogen and phosphorus has and significantly reduces, and COD COD also has 60% or more reduction, and it is bright to drop dirty effect
It is aobvious.
The above is only that the invention patent is schematical, guiding, preferred embodiment and not restrictive,
It is not intended to limit the present invention in any form, it is to the above embodiments any simple according to the technical essence of the invention
Modification, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (7)
1. a kind of restorative procedure based on river sediment in-situ covering, comprising the following steps:
S100: carrying out the covering in situ of bed mud: choosing bed mud covering material and be covered on the sediments of high pollution, the handle of physics
Polluted bed mud is separated with overlying water；
S200: it introduces a fine variety resistant emergent aquactic plant: resistant emergent aquactic plant is introduced a fine variety on capped bed mud, to inhibit the discharged dirt of bed mud
Dye object simultaneously repairs overlying water.
2. the method according to claim 1, wherein preferred, the component and weight of the bed mud covering material
Percentage are as follows: fine sand gravel 30%-80%, bentonite 20%-50%, organic polymer 2%-10%.
3. the method according to claim 1, wherein the bed mud covering material can be formed after hydrolysis expansion
High-quality elastic layer, for inhibiting release of the pollutant to overlying water in Sediments.
4. the method according to claim 1, wherein the cladding thickness of the bed mud covering material is 5-10cm.
5. the method according to claim 1, wherein the bed mud covering material to bed mud complete covering after, energy
Enough keep the ecological environment of bed mud and water body.
6. according to the method described in claim 2, it is characterized in that, the organic polymer includes acrylic resin, neoprene
One of cream, organosilicon, polyurethane are several.
7. the method according to claim 1, wherein the resistant emergent aquactic plant includes reed, canna, Pu
Grass, lotus, Chinese celery, wild rice stem Xun, lotus, cattail.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810907866.9A CN108947155A (en) | 2018-08-09 | 2018-08-09 | A kind of restorative procedure based on river sediment in-situ covering |
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| CN201810907866.9A CN108947155A (en) | 2018-08-09 | 2018-08-09 | A kind of restorative procedure based on river sediment in-situ covering |
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| CN108947155A true CN108947155A (en) | 2018-12-07 |
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| CN201810907866.9A Pending CN108947155A (en) | 2018-08-09 | 2018-08-09 | A kind of restorative procedure based on river sediment in-situ covering |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735405A (en) * | 2020-05-29 | 2021-12-03 | 南京林业大学 | Continuous composite remediation method for heavy metal polluted bottom mud |
| CN114643040A (en) * | 2020-12-18 | 2022-06-21 | 广州资源环保科技股份有限公司 | Sediment pollution blocking particles and preparation method and application thereof |
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| US6386796B1 (en) * | 2000-03-06 | 2002-05-14 | John H. Hull | Composite particles and methods for their application and implementation |
| CN102757129A (en) * | 2012-08-03 | 2012-10-31 | 山东建筑大学 | In-situ ecological restoration method for riverway polluted sediment |
| CN105859066A (en) * | 2016-04-19 | 2016-08-17 | 华侨大学 | Repairing method of water body polluting bottom mud |
| CN106673384A (en) * | 2017-01-06 | 2017-05-17 | 山东建筑大学 | Water body heavy metal polluted sediment in-situ covering and repairing method |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386796B1 (en) * | 2000-03-06 | 2002-05-14 | John H. Hull | Composite particles and methods for their application and implementation |
| CN102757129A (en) * | 2012-08-03 | 2012-10-31 | 山东建筑大学 | In-situ ecological restoration method for riverway polluted sediment |
| CN105859066A (en) * | 2016-04-19 | 2016-08-17 | 华侨大学 | Repairing method of water body polluting bottom mud |
| CN106673384A (en) * | 2017-01-06 | 2017-05-17 | 山东建筑大学 | Water body heavy metal polluted sediment in-situ covering and repairing method |
Non-Patent Citations (1)
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| 罗霞娟: "受污染河流底泥的治理研究进展", 《当代化工研究》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735405A (en) * | 2020-05-29 | 2021-12-03 | 南京林业大学 | Continuous composite remediation method for heavy metal polluted bottom mud |
| CN114643040A (en) * | 2020-12-18 | 2022-06-21 | 广州资源环保科技股份有限公司 | Sediment pollution blocking particles and preparation method and application thereof |
| CN114643040B (en) * | 2020-12-18 | 2024-03-19 | 广州资源环保科技股份有限公司 | Substrate sludge pollution blocking particles and preparation method and application thereof |
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Application publication date: 20181207 |