CN110395867A - A kind of ecological restoring method for administering river bottom mud heavy metal pollution - Google Patents
A kind of ecological restoring method for administering river bottom mud heavy metal pollution Download PDFInfo
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- CN110395867A CN110395867A CN201910544276.9A CN201910544276A CN110395867A CN 110395867 A CN110395867 A CN 110395867A CN 201910544276 A CN201910544276 A CN 201910544276A CN 110395867 A CN110395867 A CN 110395867A
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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
- C02F11/004—Sludge detoxification
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/123—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of stone, concrete or similar stony material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
Abstract
The invention discloses a kind of ecological restoring methods for administering river bottom mud heavy metal pollution, method includes the following steps: bed mud 1) is divided into slight pollution bed mud and serious pollution bed mud；2) digging serious pollution bed mud digs be transported to temporary field clearly clearly, and dystopy is carried out after dehydration is broken and stabilizes reparation, security landfill after maintenance detection is qualified；3) reparation, smooth river surface after maintenance detection is qualified are stabilized in situ after slight pollution bed mud being carried out removing surface and finishing；4) river surface is laid with coating；5) shore protection is modified and plants the wetland plant of different height, that is, completes to repair.The method of the present invention combines based technique for in-situ remediation and showering technology, effectively administer river bottom mud heavy metal pollution, block pollutant diffusion path, restore river channel ecology environment, have many advantages, such as repairing effect it is good, it is at low cost, meet reality and ecological environment benefit, strong applicability, applied widely, improvement and reparation suitable for different type river bottom mud heavy metal pollution.
Description
Technical field
The present invention relates to river heavy metal pollution recovery technique field, specifically a kind of improvement river bottom mud heavy metal pollution
Ecological restoring method.
Background technique
River bottom mud heavy metal pollution is global one of thorny problem.With urbanization, the quickening of process of industrialization,
River bottom mud heavy metal pollution problem becomes increasingly conspicuous.Most domestic river, lake have been subjected to different degrees of heavy metal-polluted
Partially there is the pollution such as arsenic, mercury, nickel, mercury, wherein Taihu Lake, the Yellow River and Soviet Union in dye, the predominantly heavy metal pollutions such as cadmium, copper, lead, zinc
Cadmium average content is more than the 4.67 of local background value, 10.1 and 42.3 times respectively in Zhouhe bed mud.External environment once becomes
Change, the heavy metal being deposited in bed mud is likely to be released, and deteriorates water quality, poisons Ha Noi aquatic animals and plants, makes river both sides
Plant growth receives inhibition, and the health of human and animal is directly or indirectly influenced by modes such as polluted underground water, dirty fillings.Cause
This, carries out improvement to the heavy metal pollution of river bottom mud and is of great significance.
Currently, the improvement restorative procedure of heavy metal pollution river bottom mud is generally divided into two class of in-situ immobilization and showering.
In-situ immobilization covering, biological prosthetic, original position elution, in-situ solidifying/stabilisation, steam extraction etc., have to original ecological environment
Influence relatively small, project amount is few, not additional occupied space the advantages that.After showering refers to dredging, by heavy metal polluted bed mud
It is repaired again after being transferred to land, is current the most widely used recovery technique, including dystopy curing/stabilizing, dystopy
Elution, thermal desorption, biological prosthetic etc. can quickly and largely cut down bed mud to the long-term pollution of river water body, be effectively improved
Water quality, while increasing river water body volume.But showering can occupy other land resources and Dredging Process is to original Ecology
Systematic influence is larger.Therefore, conventionally employed single recovery technique does not meet reality and ecological environment benefit, economy are low.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of restoration of the ecosystem sides for administering river bottom mud heavy metal pollution
Method, this method combine in-situ remediation method and Ex-situ remediation method, effectively administer river bottom mud heavy metal pollution, restore
River channel ecology environment.
The present invention solves above-mentioned technical problem with following technical solution:
A kind of ecological restoring method for administering river bottom mud heavy metal pollution of the present invention, includes the following steps:
The first step carries out pollution level investigation to river bottom mud and periphery, will according to the pollution level of heavy metal in bed mud
Bed mud is divided into slight pollution bed mud and serious pollution bed mud, and determines and repair target；
Second step establishes temporary field in the uncontaminated region in river periphery, for storing up and repairing polluted bed mud；
Third step draws lines to river bottom mud according to site investigation situation, determines serious pollution bed mud and slight pollution
Bed mud region；
4th step, serious pollution bed mud is dug clearly and is transported to temporary field, is then dehydrated to moisture content lower than 60%, is crushed sieve
Point to 5cm hereinafter, adding conventional repair materials by the requirement for repairing target is reached, stabilizing prosthetic appliance using conventional dystopy will
Serious pollution bed mud and repair materials mix, and maintenance is not less than 6 days after sufficiently mixing, and detection is filled out safely after reaching reparation target
It buries, not up to reparation target continues to add repair materials, mix, until reaching reparation target；
Slight pollution bed mud is carried out removing surface and finishing by the 5th step, adds routine by the requirement for repairing target is reached
Then repair materials stabilize prosthetic appliance using conventional in situ and mix well slight pollution bed mud with repair materials,
It is detected after conserving not less than 6 days, reaches smooth to the progress of river surface after repairing target, not up to reparation target continues to add and repair
Multiple material mixes, until reaching reparation target；
6th step is laid with coating on river surface；
7th step modifies river both sides shore protection, and the wetland plant of different height is planted on shore protection, and it is raw to form three-dimensional wetland
State environment.
The toxicity leaching concentration of heavy metal is no more than " sewage is comprehensive in slight pollution bed mud described in the first step of the present invention
Close discharge standard " (GB 8978) highest allows 2 times of concentration of emission, the toxicity leaching concentration of heavy metal in serious pollution bed mud
Greater than 2 times that " integrated wastewater discharge standard " (GB 8978) highest allows concentration of emission.
Coating described in 6th step of the present invention includes bentonite bed, fine sand layer, three layers of pebble layer.
Bentonite bed of the present invention is placed in river surface, and with a thickness of 40-50mm, bentonitic partial size is 0.15mm
Below.
Fine sand of the present invention is placed on above bentonite bed, and with a thickness of 90-110mm, the partial size of fine sand is 3mm or less.
Pebble layer of the present invention is placed in above fine sand layer, with a thickness of 150-200mm, the partial size of cobblestone be 80mm with
Under.
Wetland plant in 7th step of the present invention be giantreed, canna, Alocasia ordora, rhizoma acori graminei, Lythrum salicaria, in Monochoria vaginalis
Three kinds or more.
Compared with the prior art, the present invention has the following beneficial effects:
(1) the method for the present invention carries out original position and showering according to the bed mud of different pollution levels, is guaranteeing repairing effect
While, it reduces earthworks, reduce engineering cost, reduce additional occupied space, reduce the secondary pollution to environment；
(2) the method for the present invention is effectively obstructed using bentonite bed, fine sand layer, pebble layer trilaminate material as coating
Pollution of the pollutant to river, and be conducive to river channel ecology system reparation；
(3) the method for the present invention forms three-dimensional Wetland ecological by the wetland plant of the plantation different height in channel revetment
Environment is conducive to the recovery of river channel ecology system；
(4) the method for the present invention have repairing effect it is good, it is at low cost, meet reality and ecological environment benefit, be strong applicability, suitable
The advantages that wide with range.
Detailed description of the invention
Fig. 1 is that the structural schematic diagram after restoration of the ecosystem is carried out to heavy metal pollution river bottom mud using the method for the present invention.
Fig. 2 is the structural schematic diagram of coating in Fig. 1.
In figure: the river 1- surface, 2- coating, 3- shore protection, 4- wetland plant, 21- bentonite bed, 22- fine sand layer, 23-
Pebble layer.
Specific embodiment
In order to which the method for the present invention is more clearly understood, with reference to the attached drawing in the embodiment of the present invention, to this hair
Technical solution in bright embodiment carries out clear, complete description.
The present invention administers the ecological restoring method of river bottom mud heavy metal pollution, specifically includes following operating procedure:
The first step carries out pollution level probe and risk assessment to river bottom mud and periphery, according to a huge sum of money in bed mud
Bed mud is divided into slight pollution bed mud and serious pollution bed mud, and determines and repair target by the pollution level of category；
Second step establishes temporary field in the uncontaminated region in river periphery, for storing up and repairing polluted bed mud；
Third step draws lines to river bottom mud according to site investigation situation, determines serious pollution bed mud and slight pollution
Bed mud region；
4th step, serious pollution bed mud is dug clearly and is transported to temporary field, is then dehydrated to moisture content lower than 60%, is crushed sieve
Divide to 5cm hereinafter, reaching the conventional repair materials of requirement addition for repairing target as needed, and stabilize reparation using routine dystopy
Equipment mixes serious pollution bed mud and repair materials, and maintenance is not less than 6 days after sufficiently mixing, after detection reaches reparation target
Security landfill, if not up to repairing target need to continue to add repair materials, mix, until reaching reparation target；
Slight pollution bed mud is carried out removing surface and finishing by the 5th step, reaches the requirement addition for repairing target as needed
Then conventional repair materials stabilize prosthetic appliance using conventional in situ and sufficiently mix by slight pollution bed mud and repair materials
It is even, maintenance not less than detecting after 6 days, reach river surface is carried out after repairing target it is smooth, need to be after if not up to repairing target
Continuous addition repair materials mix, until reaching reparation target；
6th step is laid with coating 2 on river surface 1 as depicted in figs. 1 and 2；The coating 2 includes from the bottom to top
The bentonite bed 21 that is successively laid with, fine sand layer 22,23 3 layers of pebble layer；The bentonite bed is placed in river surface, thick
Degree is 40-50mm, and bentonitic partial size is 0.15mm or less；The fine sand is placed on above bentonite bed, with a thickness of 90-
110mm, the partial size of fine sand are 3mm or less；The pebble layer is placed in above fine sand layer, with a thickness of 150-200mm, cobblestone
Partial size is 80mm or less；
7th step, as shown in Fig. 2, finishing river both sides shore protection 3, plants the wetland plant 4 of different height on shore protection 3,
Form three-dimensional Wetland Environment；The wetland plant be giantreed, canna, Alocasia ordora, rhizoma acori graminei, Lythrum salicaria, in Monochoria vaginalis
Three kinds or more.
The toxicity leaching concentration of heavy metal is no more than " integrated wastewater row in slight pollution bed mud described in the first step of the present invention
Put standard " (GB 8978) highest allows 2 times of concentration of emission, and the toxicity leaching concentration of heavy metal is greater than in serious pollution bed mud
" integrated wastewater discharge standard " (GB 8978) highest allows 2 times of concentration of emission.
It is the application example using the method for the present invention below:
Embodiment 1: carrying out the river bottom mud of certain heavy metal pollution and repair, and bed mud is cadmium, lead contamination, the toxicity of cadmium, lead
Leaching concentration (according to method " solid waste Leaching leaching method horizontal vibration method " (HJ557-2010)) be 0-0.34mg/L,
0.01-2.54mg/L, pH 4.5-6.8, reparation target are the toxicity leaching concentration of cadmium, lead lower than " surface water environment quality mark
It is quasi- " (GB3838) Group III (cadmium 0.005mg/L, lead 0.05mg/L).Specific step is as follows:
The first step carries out probe and risk assessment to river bottom mud and periphery, by the toxicity leaching concentration of cadmium≤
The toxicity of 0.2mg/L and lead leaching concentration≤2.0mg/L bed mud is divided into slight pollution bed mud, by the toxicity leaching concentration of cadmium
The bed mud of the toxicity leaching concentration > 2.0mg/L of > 0.2mg/L or lead is divided into serious pollution bed mud (" integrated wastewater discharge mark
It is quasi- " (GB 8978) highest permission concentration of emission: cadmium 0.1mg/L, lead 1.0mg/L)；
Second step establishes temporary field in the uncontaminated region in river periphery, and draws lines to river bottom mud, determines severe dirt
Contaminate bed mud and slight pollution bed mud region；
Third step, serious pollution bed mud is dug clearly and is transported to temporary field, and being then dehydrated to moisture content is 50%, crushing and screening
To 4.5cm, then lime is added as repair materials (dosage of lime is repair bed mud quality 4%), and using conventional different
Position stabilizes prosthetic appliance and mixes serious pollution bed mud and repair materials, conserves 7 days after sufficiently mixing, and detection reaches reparation
Security landfill after target；Slight pollution bed mud is subjected to removing surface and finishing, then add lime as repair materials (lime
Dosage be repair bed mud quality 1.5%), then using conventional in situ stabilize prosthetic appliance by slight pollution bed mud with repair
Multiple material is mixed well, and maintenance detects after 7 days, reaches smooth to the progress of river surface after repairing target；
4th step is successively laid with bentonite bed, three layers of fine sand layer, pebble layer coating on river surface from the bottom to top,
Bentonite bed with a thickness of 40mm, and bentonite partial size is less than 0.15mm, fine sand layer with a thickness of 100mm, and fine sand partial size is small
In 3mm, cobblestone with a thickness of 180mm, and cobblestone partial size is less than 80mm；
5th step modifies river both sides shore protection, and it is different high that giantreed, canna, Lythrum salicaria, Monochoria vaginalis etc. are planted on shore protection
The wetland plant of degree forms three-dimensional Wetland Environment, restores the ecosystem in river, i.e. completion river heavy metal polluted bed mud
Improvement and restoration of the ecosystem.Repairing effect is shown in Table 1.
1 horizontal vibration method leaching test result 1 of table
Embodiment 2: carrying out the river bottom mud of certain heavy metal pollution and repair, and bed mud is cadmium, arsenic, zinc pollution, cadmium, arsenic, zinc
Toxicity leaching concentration (according to method " solid waste Leaching leaching method horizontal vibration method " (HJ557-2010)) be 0-
0.28mg/L, 0.1-1.50mg/L, 0-15.69mg/L, pH 5.2-6.8, reparation target is cadmium, the leaching of the toxicity of arsenic, zinc is dense
Degree is lower than " water environment quality standard " (GB3838) Group III (cadmium 0.005mg/L, arsenic 0.05mg/L, zinc 1.0mg/
L).Specific step is as follows:
The first step carries out probe and risk assessment to river bottom mud and periphery, by the toxicity leaching concentration of cadmium≤
Toxicity leaching concentration≤10.0mg/L bed mud of 0.2mg/L, toxicity leaching concentration≤1.0mg/L of arsenic and zinc are divided into slightly
Polluted bed mud leaches the toxicity of the toxicity leaching concentration > 1.0mg/L or zinc of the toxicity leaching concentration > 0.2mg/L of cadmium or arsenic
The bed mud of concentration > 10.0mg/L is divided into serious pollution bed mud, and (" integrated wastewater discharge standard " (GB 8978) highest allows to arrange
Put concentration: cadmium 0.1mg/L, arsenic 0.5mg/L, zinc 5.0mg/L)；
Second step establishes temporary field in the uncontaminated region in river periphery, and draws lines to river bottom mud, determines severe dirt
Contaminate bed mud and slight pollution bed mud region；
Third step, serious pollution bed mud is dug clearly and is transported to temporary field, and being then dehydrated to moisture content is 60%, crushing and screening
To 5cm, add ferrous sulfate and lime as repair materials (wherein the dosage of ferrous sulfate is the 2% of reparation bed mud quality,
The dosage of lime is repair bed mud quality 1.2%), and prosthetic appliance is stabilized for serious pollution bed mud using conventional dystopy
It mixes with repair materials, conserves 10 days after sufficiently mixing, detection reaches security landfill after reparation target；By slight pollution bed mud
Removing surface and finishing are carried out, adding ferrous sulfate and lime as repair materials, (wherein the dosage of ferrous sulfate is to repair
The 1.2% of bed mud quality, the dosage of lime are repair bed mud quality 0.65%), then repaired using conventional in situ stabilisation
Multiple equipment mixes well slight pollution bed mud with repair materials, and maintenance detects after 10 days, reaches after repairing target to river
Road surface carries out smooth；
4th step is successively laid with bentonite bed, three layers of fine sand layer, pebble layer coating on river surface from the bottom to top,
Bentonite bed with a thickness of 50mm, and bentonite partial size is less than 0.15mm, fine sand layer with a thickness of 90mm, and fine sand partial size is less than
3mm, cobblestone with a thickness of 200mm, and cobblestone partial size is less than 80mm；
5th step modifies river both sides shore protection, and the different heights such as giantreed, Alocasia ordora, rhizoma acori graminei, Lythrum salicaria are planted on shore protection
Wetland plant, form three-dimensional Wetland Environment, restore the ecosystem in river, is i.e. completion river heavy metal polluted bed mud
Improvement and restoration of the ecosystem.Repairing effect is shown in Table 2.
2 horizontal vibration method leaching test result 2 of table
Embodiment 3: carrying out the river bottom mud of certain heavy metal pollution and repair, and bed mud is lead, zinc pollution, the toxicity of lead, zinc
Leaching concentration (according to method " solid waste Leaching leaching method horizontal vibration method " (HJ557-2010)) be 0-1.6mg/L,
1.6-37.1mg/L, pH 3.7-5.3, reparation target are the toxicity leaching concentration of lead, zinc lower than " surface water environment quality mark
It is quasi- " (GB3838) Group III (lead 0.05mg/L, zinc 1.0mg/L).Specific step is as follows:
The first step carries out probe and risk assessment to river bottom mud and periphery, by the toxicity leaching concentration of lead≤
The toxicity of 2.0mg/L and zinc leaching concentration≤10.0mg/L bed mud is divided into slight pollution bed mud, the toxicity of lead is leached dense
The bed mud of the toxicity leaching concentration > 10.0mg/L of degree > 2.0mg/L or zinc is divided into (" the integrated wastewater discharge of serious pollution bed mud
Standard " (GB 8978) highest permission concentration of emission: lead 1.0mg/L, zinc 5.0mg/L)；
Second step establishes temporary field in the uncontaminated region in river periphery, and draws lines to river bottom mud, determines severe dirt
Contaminate bed mud and slight pollution bed mud region；
Third step, serious pollution bed mud is dug clearly and is transported to temporary field, and being then dehydrated to moisture content is 55%, crushing and screening
To 4cm, lime is added as repair materials (dosage of lime is repair bed mud quality 3%), is stablized using conventional dystopy
Change prosthetic appliance to mix serious pollution bed mud and repair materials, conserve 7 days after sufficiently mixing, after detection reaches reparation target
Security landfill；Slight pollution bed mud is subjected to removing surface and finishing, (dosage of lime is addition lime as repair materials
Repair the 1.5% of bed mud quality), then using conventional in situ stabilize prosthetic appliance by slight pollution bed mud and repair materials into
Row mixes well, and maintenance detects after 7 days, reaches smooth to the progress of river surface after repairing target；
4th step is from bottom to top successively laid with bentonite bed, three layers of fine sand layer, pebble layer coating on river surface,
Bentonite bed with a thickness of 45mm, and bentonite partial size is less than 0.15mm, fine sand layer with a thickness of 110mm, and fine sand partial size is small
In 3mm, cobblestone with a thickness of 150mm, and cobblestone partial size is less than 80mm；
5th step modifies river both sides shore protection, and the different heights such as giantreed, canna, Alocasia ordora, rhizoma acori graminei are planted on shore protection
Wetland plant, form three-dimensional Wetland Environment, restore the ecosystem in river, is i.e. completion river heavy metal polluted bed mud
Improvement and restoration of the ecosystem.Repairing effect is shown in Table 3.
3 horizontal vibration method leaching test result 3 of table
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of ecological restoring method for administering river bottom mud heavy metal pollution, which comprises the steps of:
The first step carries out pollution level investigation to river bottom mud and periphery, according to the pollution level of heavy metal in bed mud, by bed mud
It is divided into slight pollution bed mud and serious pollution bed mud, and determines and repair target；
Second step establishes temporary field in the uncontaminated region in river periphery, for storing up and repairing polluted bed mud；
Third step draws lines to river bottom mud according to site investigation situation, determines serious pollution bed mud and slight pollution bed mud
Region；
4th step, serious pollution bed mud is dug clearly and is transported to temporary field, is then dehydrated to moisture content lower than 60%, crushing and screening is extremely
5cm stabilizes prosthetic appliance for severe using conventional dystopy hereinafter, by the conventional repair materials of the requirement for repairing target addition are reached
Polluted bed mud and repair materials mix, and maintenance is not less than 6 days after sufficiently mixing, and detection reaches security landfill after reparation target,
It not up to repairs target to continue to add repair materials, mix, until reaching reparation target；
Slight pollution bed mud is carried out removing surface and finishing by the 5th step, is repaired by the requirement addition routine for repairing target is reached
Then material stabilizes prosthetic appliance using conventional in situ and mixes well slight pollution bed mud with repair materials, conserves
It is detected after not less than 6 days, reaches smooth to the progress of river surface after repairing target, not up to reparation target continues addition reparation material
Material mixes, until reaching reparation target；
6th step is laid with coating on river surface；
7th step modifies river both sides shore protection, and the wetland plant of different height is planted on shore protection, forms three-dimensional Wetland ecological ring
Border.
2. a kind of ecological restoring method for administering river bottom mud heavy metal pollution according to claim 1, it is characterised in that: the
The toxicity leaching concentration of heavy metal is not more than " integrated wastewater discharge standard " (GB 8978) in slight pollution bed mud described in one step
Highest allows 2 times of concentration of emission, and the toxicity leaching concentration of heavy metal is greater than " integrated wastewater discharge mark in serious pollution bed mud
It is quasi- " (GB 8978) highest allows 2 times of concentration of emission.
3. a kind of ecological restoring method for administering river bottom mud heavy metal pollution according to claim 1, it is characterised in that: the
Coating described in six steps includes bentonite bed, fine sand layer, three layers of pebble layer.
4. a kind of ecological restoring method for administering river bottom mud heavy metal pollution according to claim 3, it is characterised in that: institute
It states bentonite bed and is placed in river surface, with a thickness of 40-50mm, bentonitic partial size is 0.15mm or less.
5. a kind of ecological restoring method for administering river bottom mud heavy metal pollution according to claim 3, it is characterised in that: institute
It states fine sand to be placed on above bentonite bed, with a thickness of 90-110mm, the partial size of fine sand is 3mm or less.
6. a kind of ecological restoring method for administering river bottom mud heavy metal pollution according to claim 3, it is characterised in that: institute
It states pebble layer to be placed in above fine sand layer, with a thickness of 150-200mm, the partial size of cobblestone is 80mm or less.
7. a kind of ecological restoring method and structure for administering river bottom mud heavy metal pollution according to claim 1, feature
Be: wetland plant described in the 7th step is giantreed, canna, Alocasia ordora, rhizoma acori graminei, Lythrum salicaria, three kinds or more in Monochoria vaginalis.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392999A (en) * | 2020-04-03 | 2020-07-10 | 清控环境(北京)有限公司 | Technology suitable for treating and disposing bottom mud of rivers and lakes |
| CN111423079A (en) * | 2020-02-26 | 2020-07-17 | 中交第一公路勘察设计研究院有限公司 | Contaminated bottom mud in-situ capping method combining heterogeneous layered coverage with chemical treatment |
| CN112114091A (en) * | 2020-09-04 | 2020-12-22 | 中国科学院南京土壤研究所 | Method for calculating contribution rate of new atmospheric sedimentation to plant enrichment of heavy metals |
| CN115182293A (en) * | 2022-06-01 | 2022-10-14 | 中交（天津）生态环保设计研究院有限公司 | River channel endogenous management method |
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| CN112114091B (en) * | 2020-09-04 | 2023-08-11 | 中国科学院南京土壤研究所 | Method for calculating contribution rate of atmospheric new sedimentation to plant enrichment heavy metal |
| CN115182293A (en) * | 2022-06-01 | 2022-10-14 | 中交（天津）生态环保设计研究院有限公司 | River channel endogenous management method |
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