CN117865355A - Method for repairing heavy metal pollution damage of mangrove wetland sediment - Google Patents
Method for repairing heavy metal pollution damage of mangrove wetland sediment Download PDFInfo
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- CN117865355A CN117865355A CN202310123347.4A CN202310123347A CN117865355A CN 117865355 A CN117865355 A CN 117865355A CN 202310123347 A CN202310123347 A CN 202310123347A CN 117865355 A CN117865355 A CN 117865355A
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Abstract
The invention discloses a method for repairing heavy metal pollution damage of a mangrove wetland sediment, which comprises the following steps: s1, respectively measuring heavy metal content indexes of wetland sediments and polluted water in a mangrove wetland sediment heavy metal pollution area to be repaired; s2, selecting a heavy metal restoration agent corresponding to the wetland sediment and polluted water for treatment according to the heavy metal content index; s3, forming a surrounding and blocking area by using a first blocking wall, a second blocking wall and two green planting floating plates in the heavy metal pollution area of the mangrove wetland sediment; s4, planting various aquatic plants on the green planting floating plate in a matching mode. According to the invention, the first and second barrier walls and the green planting floating plate are used for enclosing and blocking the key repair area, and the durable repair treatment is carried out, so that the dosage controllability is high, and the problem of accumulation and aggregation caused by large amount of delivery can be avoided while the cost of the medicament is saved.
Description
Technical Field
The invention relates to the technical field of wetland restoration, in particular to a restoration method for heavy metal pollution damage of a mangrove wetland sediment.
Background
Mangrove is one of the ocean ecosystems with highest production capacity in the sea-land staggered areas of the tropical and subtropical coastal zones, and plays an extremely important role in purifying sea water, preventing wind and eliminating waves, maintaining biodiversity, fixing carbon, storing carbon and the like. In recent years, the protection and repair of mangroves are actively progressed, the trend of sharply reducing the area of the mangroves is preliminarily turned, but the problems of small total area of the mangroves, degradation of habitat, environmental pollution, reduced biodiversity, invasion of foreign organisms and the like are more prominent, the whole protection coordination of the area is insufficient, and the protection and supervision capability is weak.
Along with the continuous development of industry in recent years, part of mangrove wetland is subjected to serious environmental pollution, wherein heavy metal pollution is the most serious, the influence of the environmental pollution on the growth of mangrove is great, the water body mobility of beach wetland is strong, the environmental pollution such as heavy metal is difficult to repair effectively, surrounding repair is usually required, and heavy metal remover is injected into the wetland in the region.
However, on the one hand, the dosage of the treatment method is uncontrollable, and a large dosage is usually used to ensure heavy metal removal of the mangrove wetland sediment, but not only causes the cost of the medicament to be large, but also a large amount of residual medicament can cause the problem of secondary environmental pollution, and the polluted water in the area is not usually subjected to restoration treatment, however, the polluted water can also have the problem of heavy metal pollution, and the heavy metal restoration work of the mangrove wetland sediment is difficult and heavy due to sedimentation and the like deposited in the mangrove wetland sediment.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for repairing heavy metal pollution damage of a mangrove wetland sediment.
The technical scheme of the invention is as follows: a method for repairing damage of heavy metal pollution of a mangrove wetland sediment comprises the following steps:
s1, respectively measuring heavy metal content indexes of wetland sediments and polluted water in a mangrove wetland sediment heavy metal pollution area to be repaired;
s2, selecting a heavy metal restoration medicament corresponding to the treatment of the wetland sediment and the polluted water according to the heavy metal content index, and correspondingly filling the heavy metal restoration medicament into a first medicament bin of the first barrier wall and a second medicament bin of the second barrier wall;
s3, forming a surrounding and blocking area by using a first baffle wall, a second baffle wall and two green planting floating plates in the heavy metal pollution area of the mangrove wetland deposit, wherein the first baffle wall and the second baffle wall are oppositely arranged, and the lower ends of the first baffle wall and the second baffle wall are inserted into the bottom mud of the mangrove wetland;
s4, planting aquatic plants on the green planting floating plate in a matched mode, circulating the polluted water in the surrounding and blocking area by utilizing a water pumping tank and a flow guiding pipe which are arranged between the first separation wall and the second separation wall, and repairing heavy metal pollution of the mangrove wetland sediments by means of heavy metal repairing agents and the aquatic plants.
Further, the heavy metal repair agent is a heavy metal remover, but is not limited to the heavy metal remover, and a heavy metal remover with stronger correspondence can be selected according to the detected heavy metal type.
Description: the commercial heavy metal removing reagent is adopted, so that the cost is lower while the removing effect meets the expectations, and the heavy metal pollution repairing work of the large-area mangrove wetland sediment is satisfied.
Further, the aquatic plant is any one or more of a submerged plant, an emergent aquatic plant or a floating leaf plant, for example: the submerged plants comprise herba Sophorae Alopecuroidis, hedyotidis Diffusae, and Goldfish algae, the emergent plants comprise rhizoma Acori Calami, herba Alii Fistulosi, and rhizoma Phragmitis, and the floating plants comprise herba Spirodelae and flos Nymphaeae, but are not limited to the above.
Description: ecological restoration treatment of heavy metal pollution is carried out through planting of using aquatic plant to can play certain fender effect that encloses, thereby improve the contaminated water between first barrier wall, the second barrier wall and circulate efficiency, ensure the medicament treatment effect of water treatment tank.
Further, the first baffle wall is hollow, the inner side wall and the outer side wall of the first baffle wall are both provided with openings for clamping the filter screen, the outer side wall of the first baffle wall is provided with a water treatment tank which is in sealing connection with the first baffle wall, and the water treatment tank is communicated with the openings;
a plurality of stirring rods arranged in the vertical direction are arranged in the water treatment tank, a first carrier plate is arranged at the upper part in the water treatment tank in the horizontal direction, the upper ends of the stirring rods penetrate through the first carrier plate and are rotationally connected with the top surface of the water treatment tank, fluted discs for driving two adjacent stirring rods are arranged on the stirring rods above the first carrier plate, a main bevel gear is arranged on the stirring rods below the first carrier plate, and stirring blades are arranged at the lower ends of the stirring rods;
a plurality of scrapers for scraping the filter screen are arranged between the two filter screens, a plurality of pull rods corresponding to the stirring rods one by one are penetrated and arranged on the plurality of scrapers along the vertical direction, a cam frame is arranged at the upper end of each pull rod, a transmission rod is arranged between each cam frame and a corresponding main bevel gear, a second carrier plate is arranged at the upper part in the water treatment tank along the vertical direction, a secondary bevel gear meshed with the main bevel gear is arranged at one end of each transmission rod, a cam matched and driven with the cam frame is arranged at the other end of each transmission rod,
the water treatment tank top surface is provided with a driving motor, and an output shaft of the driving motor penetrates through the water treatment tank top surface and is fixedly connected with the upper end of any stirring rod.
Description: the first separation wall mainly plays a role in isolation and filtration, polluted water enters the water treatment tank through the filtration mesh screen, heavy metal ions in the polluted water are removed by matching with a heavy metal restoration agent in the water treatment tank, the polluted water treated by the heavy metal restoration agent is circulated to the second separation wall by matching with a water pumping tank, and the polluted water is subjected to repeated heavy metal removal restoration through the circulation between the first separation wall and the second separation wall;
meanwhile, the water treatment tank fully utilizes the driving force of the driving motor by driving the driving motor, and the driving force is as follows:
1) Is used for driving each stirring rod to rotate, and the fluted disc transmission is adopted among the stirring rods, because the rotation directions of the two adjacent stirring rods are opposite, the stirring and mixing efficiency of the polluted water and the heavy metal restoration agent can be improved,
2) The device is used for driving each pull rod to reciprocate up and down, and the filter screens on two sides of the scraping plates are scraped and cleaned under the action of components such as the transmission rods, so that the influence on the treatment efficiency of the water treatment tank due to the blocking of the filter screens caused by polluted water sundries and the like is avoided.
Still further, water treatment case upper portion inner wall is equipped with a plurality of first medicament warehouses that correspond with the puddler one-to-one, first medicament warehouses bottom surface is equipped with out the medicine mouth, the cover is equipped with on the puddler be used for controlling go out the medicine mouth open-close carousel, be equipped with on the carousel with go out the through-hole that the medicine mouth size matches.
Description: the stirring rod is further utilized to rotate, so that the stirring rod intermittently controls the drug discharging amount of the first drug bin in the rotation process, thereby playing a role in carrying out heavy metal treatment on polluted water in a small amount and multiple treatment modes, avoiding the situation of accumulation, aggregation or large diffusion after a large amount of delivery, not only increasing the drug dosage cost, but also easily causing secondary pollution to the mangrove wetland environment.
Furthermore, the pump water tank is provided with two groups, the first baffle wall is provided with a supporting plate for placing the pump water tank, the interior of the pump water tank is hollow, the interior of the pump water tank is provided with a first piston, the first piston is provided with at least one first piston rod, the lower end of the first piston rod is provided with a push plate for contacting with the upper end of the cam frame,
the side walls of the two sides of the water pumping tank are respectively provided with a water inlet and a water outlet, the water inlet extends into the bottom of the water treatment tank through a pipeline, the water inlet is provided with a one-way valve for unidirectional inflow into the water pumping tank, the water outlet is in butt joint with the guide pipe, and the water outlet is provided with a one-way valve for unidirectional inflow into the guide pipe.
Description: through the arrangement of the pump water tank, the kinetic energy of the up-and-down reciprocating motion of the pull rod can be further utilized, so that the pump water tank can inject the polluted water of the water treatment tank into the guide pipe while utilizing the up-and-down reciprocating motion of the pull rod under the condition of not adopting external driving of a traditional water pump and the like, and then the polluted water flows back to the second baffle wall to form the circulation of the polluted water.
Furthermore, the honeycomb duct is 3 ~ 5 contained angles with the contained angle setting of horizontal plane, and the honeycomb duct one end that is located the eminence communicates with the delivery port of pump water tank, and honeycomb duct one end that is located the eminence is equipped with the elbow that is used for stretching into the second barrier wall, is equipped with the fixture block that is used for fixed honeycomb duct on the second barrier wall.
Description: through the inclined arrangement of the guide pipe, the efficiency of the guide pipe for conveying the polluted water in the water treatment tank to the second separation wall can be improved; can prevent through setting up the elbow that the honeycomb duct from spilling the polluted water outside the second barrier wall, influence circulation conveying efficiency.
Further, the second baffle wall is hollow and the inner upper part is provided with a liquid storage box which is in sliding sealing connection with the liquid storage box, the inner side wall of the second baffle wall is provided with a plurality of injection pipes which are used for injecting heavy metal repairing medicaments into the wetland sediments along the vertical direction, one end of each injection pipe is provided with a rotating block, the rotating block is rotationally connected with a groove arranged on the inner side wall of the second baffle wall, the side surface of each injection pipe is provided with a plurality of sockets which are used for inserting the wetland sediments,
the lower part in the second baffle wall is provided with a plurality of second medicament bins which are in one-to-one correspondence with the medicament injection pipes, medicament outlets of the second medicament bins are provided with hoses which are communicated with the interiors of the medicament injection pipes,
a pressing plate used for contacting with the bottom of the liquid storage box is arranged above the top surface of the second medicament bin, a second piston rod is arranged on the pressing plate, the lower end of the second piston rod penetrates through the second medicament bin and is provided with a second piston, a spring is sleeved on the second piston rod positioned between the pressing plate and the top surface of the second medicament bin,
the liquid storage box is characterized in that a liquid outlet bar hole is formed in the lower portion of the side wall of the liquid storage box, and a liquid guide bar hole for being matched with the liquid storage box to slide downwards to be in butt joint is formed in the side wall of the second baffle wall.
Description: the second partition wall mainly plays a role in applying heavy metal restoration medicament to the wetland sediment, and the water treatment box is utilized to convey the back-flowed polluted water, so that the heavy metal restoration medicament is intermittently injected into the wetland sediment under the action of gravity sedimentation, and the conditions of accumulation and aggregation caused by single massive delivery are avoided, so that the medicament dosage cost is increased, and secondary pollution is easily caused to the mangrove wetland environment.
Further, the bottom surfaces of the first baffle wall and the second baffle wall are respectively provided with an inserting rod for being inserted into the bottom mud of the mangrove wetland.
Description: through set up the inserted bar in first baffle wall, second baffle wall bottom, can effectively improve the stability that first baffle wall, second baffle wall inserted in the mangrove wetland bed mud.
Further, the bottom of the green planting floating plate is provided with a plurality of meshes, the side wall of the green planting floating plate is provided with a sliding block which is used for being in sliding connection with the first separation wall and the second separation wall, and the first separation wall and the second separation wall are provided with sliding rails which are in sliding connection with the sliding blocks; wherein, the green floating plate that plants adopts foam material or stainless steel material, when the green floating plate that plants is stainless steel material, need set up the gasbag in green floating plate bottom.
Description: through the setting of green floating plate of planting, on the one hand can further improve the stability of first baffle wall, second baffle wall, on the other hand can make green floating plate of planting when enclosing into the fender region with first baffle wall, second baffle wall, does not influence the contact of green floating plate and wetland water level.
The beneficial effects of the invention are as follows:
(1) The repairing method disclosed by the invention can be used for carrying out lasting repairing treatment on the heavy metal pollution of the mangrove wetland sediment, has strong controllability on the applied medicament, can be used for avoiding the problems of accumulation, aggregation and the like caused by a large amount of throwing while saving the medicament cost, and can be used for stably repairing the heavy metal pollution of the mangrove wetland sediment by carrying out synchronous removing treatment on the heavy metal of the wetland sediment and polluted water.
(2) According to the restoration method disclosed by the invention, a combined restoration mode of the heavy metal restoration agent and the aquatic plants is adopted, and ecological cooperative restoration is carried out through the aquatic plants while the restoration treatment of the chemical agent is matched, so that the effect of heavy metal pollution treatment of the mangrove wetland sediments is improved.
(3) The repairing method provided by the invention uses the first and second barrier walls and the green planting floating plate to enclose the key repairing area, so that the efficiency of repairing heavy metals in the area can be improved, and the repairing is carried out by matching with the structural arrangement of the first and second barrier walls through a few repeated repairing means, so that the driving equipment is less in use, convenient to overhaul and maintain, energy-saving and environment-friendly.
Drawings
FIG. 1 is a schematic view showing the initial structure of a first barrier wall, a second barrier wall and a green planting floating plate according to the present invention;
FIG. 2 is a schematic view showing the arrangement structure of the first barrier wall, the second barrier wall and the green planting floating plate according to the present invention;
FIG. 3 is a schematic view of the structure of a first wall according to the present invention;
FIG. 4 is a schematic view showing the internal structure of the first barrier wall of the present invention;
FIG. 5 is a schematic view showing the internal structure of the water treatment tank according to the present invention;
FIG. 6 is a schematic diagram showing the internal structure of the water treatment tank according to the present invention;
FIG. 7 is a schematic illustration of the connection of the stirring rod and its related components according to the present invention;
FIG. 8 is a schematic view showing the internal structure of a second barrier wall according to the present invention;
FIG. 9 is a schematic illustration of the connection of the water storage cartridge and its associated components of the present invention;
FIG. 10 is a schematic view of a green plant floating plate according to the present invention;
FIG. 11 is a schematic diagram showing the connection relationship between the pump water tank and the related components according to embodiment 2 of the present invention;
fig. 12 is a schematic view showing the internal structure of a pump water tank according to embodiment 2 of the present invention;
the device comprises a first blocking wall, a first 11-opening, a second 12-filter screen, a first 13-scraping plate, a second 14-pull rod, a first 15-cam frame, a second 16-cam, a second 2-blocking wall, a first 21-liquid storage box, a second 22-liquid injection pipe, a second 23-rotating block, a second 24-medicine bin, a first 25-pressing plate, a second 26-clamping block, a first 3-green planting floating plate, a first 4-water treatment box, a first 41-stirring rod, a first 42-carrying plate, a first 43-fluted disc, a first 44-main bevel gear, a second 45-transmission rod, a second 46-carrying plate, a second 47-auxiliary bevel gear, a first 48-medicine bin, a first 49-rotating disc, a second 5-pumping water tank, a first 51-water inlet, a second 52-water outlet, a first 53-pipeline, a first 54-pushing plate, a second 6-guiding pipe and a first 61-elbow.
Detailed Description
The invention will be described in further detail with reference to the following embodiments to better embody the advantages of the invention.
Example 1
A method for repairing damage of heavy metal pollution of a mangrove wetland sediment comprises the following steps:
s1, respectively measuring heavy metal content indexes of wetland sediments and polluted water in a mangrove wetland sediment heavy metal pollution area to be repaired;
s2, selecting a heavy metal restoration medicament corresponding to the treatment of the wetland sediment and the polluted water according to the heavy metal content index, and correspondingly filling the heavy metal restoration medicament into the first medicament bin 48 of the first barrier wall 1 and the second medicament bin 24 of the second barrier wall 2; the heavy metal restoration agent is a commercial heavy metal remover;
s3, forming a surrounding and blocking area by using a first baffle wall 1, a second baffle wall 2 and two green planting floating plates 3 in a heavy metal pollution area of the mangrove wetland deposit, wherein the first baffle wall 1 and the second baffle wall 2 are oppositely arranged, and the lower ends of the first baffle wall 1 and the second baffle wall 2 are inserted into the bottom mud of the mangrove wetland for 50cm; the first baffle wall 1 and the second baffle wall 2 are commercial EVA boards, and the green planting floating board 3 is a commercial rigid foam board with a plurality of meshes; the first medicament bin 48 and the second medicament bin 24 are respectively provided with a medicament discharging port for electrically controlling to open an electromagnetic valve, the second medicament bin 24 is provided with a medicament injecting port for being inserted into the wetland sediment for 5cm,
s4, planting various aquatic plants on the green planting floating plate 3 in a matching mode, circulating the polluted water in the enclosure area by utilizing a water pumping tank 5 and a flow guide pipe 6 which are arranged between the first separation wall 1 and the second separation wall 2, and repairing heavy metal pollution of the mangrove wetland sediments by the heavy metal repairing agent and the aquatic plants; the aquatic plants comprise submerged plants, emergent aquatic plants and floating leaf plants, wherein the submerged plants are black algae, the emergent aquatic plants are green onions, the floating leaf plants are duckweed, and the aquatic plant comprises the following components in percentage by weight: 1:1 is planted in a green planting floating plate 3; the water pump is arranged in the water pump tank 5, the water inlet end of the water pump extends into the inner lower part of the first baffle wall 1 through a water pipe, and the water outlet end of the water pump is in butt joint with the guide pipe 6.
Example 2
The embodiment is basically the same as the embodiment 1, except that, as shown in fig. 1, 2 and 3, the first partition wall 1 is hollow, the inner and outer side walls of the first partition wall 1 are respectively provided with an opening 11 for clamping a filter screen 12, the outer side wall of the first partition wall 1 is provided with a water treatment tank 4 in sealing connection with the first partition wall, and the water treatment tank 4 is communicated with the opening 11; as shown in fig. 5 and 6, five stirring rods 41 arranged along the vertical direction are arranged in the water treatment tank 4, a first carrier plate 42 is arranged at the upper part in the water treatment tank 4 along the horizontal direction, the upper ends of the stirring rods 41 penetrate through the first carrier plate 42 and are rotationally connected with the top surface of the water treatment tank 4, fluted discs 43 for driving two adjacent stirring rods 41 are arranged on the stirring rods 41 above the first carrier plate 42, a main bevel gear 44 is arranged on the stirring rods 41 below the first carrier plate 42, and stirring blades are arranged at the lower ends of the stirring rods 41; as shown in fig. 4, five scrapers 13 for scraping the filter screen 12 are arranged between two filter screens 12 at equal intervals, five pull rods 14 which are in one-to-one correspondence with stirring rods 41 are penetrated through the five scrapers 13 along the vertical direction, a cam frame 15 is arranged at the upper end of each pull rod 14, a transmission rod 45 is arranged between each cam frame 15 and a corresponding main bevel gear 44, a second carrier plate 46 is arranged at the upper part in each water treatment tank 4 along the vertical direction, a secondary bevel gear 47 which is in meshed transmission with each main bevel gear 44 is arranged at one end of each transmission rod 45, a cam 16 which is used for being matched with each cam frame 15 is arranged at the other end of each transmission rod 45, a driving motor is arranged at the top surface of each water treatment tank 4, an output shaft of each driving motor penetrates through the top surface of each water treatment tank 4 and is fixedly connected with the upper end of any stirring rod, five first medicament bins 48 which are in one-to-one correspondence with the stirring rods 41 are arranged on the inner wall of the upper part of each water treatment tank 4, medicament outlets are arranged at the bottom surfaces of the first bins 48, medicament outlets 41 are sleeved on the stirring rods 41, large rotary discs are matched with the rotary discs for controlling the medicament outlets to be opened;
as shown in fig. 8 and 9, the second barrier wall 2 is hollow and the upper part in the interior is provided with a liquid storage box 21 which is in sliding sealing connection with the liquid storage box, the inner side wall of the second barrier wall 2 is provided with eight injection pipes 22 which are used for injecting heavy metal repairing medicaments into the wetland sediments along the vertical direction, one end of each injection pipe 22 is provided with a rotating block 23, the rotating block 23 is rotationally connected with a groove arranged on the inner side wall of the second barrier wall 2, the side surface of each injection pipe 22 is provided with a plurality of sockets which are used for inserting the wetland sediments, the lower part in the second barrier wall 2 is provided with eight second medicament bins 24 which are in one-to-one correspondence with the injection pipes 22, the medicament outlet of each second medicament bin 24 is provided with a hose which is communicated with the interior of each injection pipe 22, the upper part of the top surface of each second medicament bin 24 is provided with a pressing plate 25 which is used for contacting the bottom of the liquid storage box 21, the pressing plate 25 is provided with a second piston rod, the lower end of each second piston rod penetrates through the second medicament bin 24 and is provided with a second piston, the upper part of each second piston rod is sleeved with a spring which is arranged between the pressing plate 25 and the top surface of the second bin 24, the liquid storage box is provided with a plurality of second medicament bins, and the lower side wall 21 is provided with a guide bar hole which is matched with the lower side wall for sliding connection of the side wall 2;
as shown in fig. 1, 2 and 10, the bottom surfaces of the first and second baffle walls 1 and 2 are respectively provided with an inserting rod for being inserted into the bottom mud of the mangrove wetland, the inserting rods are 50cm long, the bottom of the green planting floating plate 3 is provided with a plurality of meshes, the side wall of the green planting floating plate 3 is provided with a sliding block for being in sliding connection with the first and second baffle walls 1 and 2, and the first and second baffle walls 1 and 2 are provided with sliding rails in sliding connection with the sliding blocks; wherein, the green planting floating plate adopts commercial rigid foam; the water pump is arranged in the water pumping tank 5, the water inlet end of the water pump extends into the lower part in the water treatment tank 4 through a water pipe, the water outlet end of the water pump is in butt joint with the guide pipe 6, the guide pipe 6 is arranged at an included angle of 3 degrees with a horizontal included angle, one end of the guide pipe 6 positioned at a high position is communicated with the water outlet 52 of the water pumping tank 51, one end of the guide pipe 6 positioned at a low position is provided with an elbow 61 for extending into the second baffle wall 2, and a clamping block 26 for fixing the guide pipe 6 is arranged on the second baffle wall 2.
The working principle of the first baffle plate 1 and the second baffle plate 2 is as follows:
the driving motor is started, the stirring rods 41 are driven to rotate by the driving motor, the other stirring rods 41 rotate under the meshing transmission action of the fluted disc 43, and during the rotation of the stirring rods 41,
the stirring rod 41 drives the main bevel gear 44 to rotate, so that the auxiliary bevel gear 47 drives the transmission rod 45 to rotate, and in the process that the transmission rod 45 drives the cam 16 to rotate, the transmission rod is matched with the cam frame 15 to lift each pull rod 14 up and down, so that each pull rod 14 drives the scraping plate 13 to reciprocate up and down, the filter screen 12 is scraped and swept through bristles attached to two sides of the scraping plate,
the stirring rod 41 drives the rotary disk 49 to rotate, so that the through holes of the rotary disk 49 periodically pass through the medicine outlet of the first medicine bin 48, and heavy metal repair medicine is applied to the water treatment tank 4 during the butt joint of the medicine outlet and the through holes,
starting a water pump, pumping the polluted water mixed with the heavy metal restoration medicament in the water treatment tank 4 into the guide pipe 6 by the water pump, conveying the polluted water into the liquid storage box 21 of the second baffle wall 2 by the guide pipe 6, along with continuous accumulation of the polluted water, rising the water level in the liquid storage box 21, increasing the gravity, descending the liquid storage box 21 and pressing down each pressing plate 25, extruding the heavy metal restoration medicament in the second medicament bin 24 to the medicament injection pipe 22, guiding the heavy metal restoration medicament into the wetland sediment through each inserting opening of the medicament injection pipe 22, and at the same time, abutting the liquid outlet holes of the liquid storage box 21 with the liquid guide holes of the second baffle wall 2 after the liquid storage box 21 descends, so that the polluted water in the liquid storage box 21 flows out, and when the water level in the liquid storage box 21 descends and the gravity decreases, the liquid storage box 21 ascends under the recovery of spring force, and thus circularly reciprocates.
Example 3
This embodiment is basically the same as embodiment 2, except that, as shown in fig. 11 and 12, the pump water tank 5 is provided with two groups, the first baffle wall 1 is provided with a supporting plate for placing the pump water tank 5, the interior of the pump water tank 5 is hollow and is provided with a first piston, the first piston is provided with two first piston rods, the lower end of the first piston rod is provided with a push plate 51 for contacting with the upper end of the cam frame 15, the side walls of the two sides of the pump water tank 51 are respectively provided with two water inlets 51 and one water outlet 52, the water inlets 51 extend into the inner bottom of the water treatment tank 4 through a pipeline 53, the water inlets 51 are provided with one-way valves for one-way inflow into the pump water tank 51, the water outlets 52 are in contact with the guide pipe 6, and the water outlets 52 are provided with one-way valves for one-way inflow into the guide pipe 6.
The working principle of the pump water tank 5 is as follows:
unlike the working principle of the embodiment 1, the present embodiment does not need to provide a water pump, during the up-and-down reciprocation of the cam frame 15, the cam frame 15 continuously drives the push plate 54 to move up and down, so that the first piston in the pump water tank 5 reciprocates, and thus under the action of the check valve and the negative pressure of the piston, the polluted water in the water treatment tank 4 is continuously sucked and guided into the guide pipe 6, the guide pipe 6 conveys the polluted water into the liquid storage box 21 of the second baffle wall 2, and other working principles are the same as those of the embodiment 1, wherein the second medicament bin 24 is the same as the arrangement and principle of the pump water tank 5.
Application example
The repair methods of embodiments 1 and 2 of the present invention are used to repair a certain mangrove wetland in the present market in the field, the depth of the water is about 70cm, two identical pollution areas (length 5m×width 3 m) are selected, wherein the deposit of the mangrove wetland is detected, and the types and contents of the detected heavy metals are shown in the following table 1:
TABLE 1 heavy metal species and content of mangrove wetland sediments
In the repairing method of example 1 of the present invention, a commercial heavy metal remover (a macrosen heavy metal scavenger diluted with deionized water to a heavy metal removal reagent having a mass concentration of 10%) was used as the reagent for the second barrier wall in an amount of 5.5L, and a macrosen heavy metal scavenger diluted with deionized water to a heavy metal removal reagent having a mass concentration of 2% was used as the reagent for the first barrier wall in an amount of 7.5L, and a repairing treatment was performed for three months, with the repairing result shown in table 2 below:
TABLE 2 heavy metal species and content after mangrove wetland sediment remediation
| Species of type | Mg/kg content after repair treatment | Removal rate% |
| Ni | 419 | 85.9 |
| Cr | 347 | 81.2 |
| Cu | 205 | 81.7 |
| As | 178 | 83.4 |
As can be seen from the comparison of Table 2 with Table 1, the removal rate of the heavy metal pollution in the mangrove wetland sediment is more than 80% after the mangrove wetland sediment is repaired for three months.
Using the repairing method of example 2 of the present invention, a commercial heavy metal remover (a macrosen heavy metal scavenger diluted with deionized water to a heavy metal removal reagent of 10% by mass concentration) was used as the agent for the second barrier wall in an amount of 5.5L, while a macrosen heavy metal scavenger diluted with deionized water to a heavy metal removal reagent of 2% by mass concentration was used as the agent for the first barrier wall in an amount of 7.5L, wherein the rotation speed of the driving motor was controlled to lower the liquid storage box every 3h, and a repairing treatment was performed for three months, and the repairing results are shown in table 3 below:
TABLE 3 heavy metal species and content after mangrove wetland sediment remediation
As can be seen from the comparison of the table 3 with the tables 1 and 2, after the repair treatment of the mangrove wetland sediment for three months, the removal rate of the heavy metal pollution in the mangrove wetland sediment is over 98 percent, and the repair effect is obviously improved by using the first and second baffle walls in the embodiment 2, so that the repair method provided by the invention has an effective repair treatment effect on the heavy metal in the mangrove wetland sediment.
Claims (10)
1. The method for repairing the damage of the mangrove wetland sediment caused by heavy metal pollution is characterized by comprising the following steps of:
s1, respectively measuring heavy metal content indexes of wetland sediments and polluted water in a mangrove wetland sediment heavy metal pollution area to be repaired;
s2, selecting a heavy metal restoration medicament corresponding to the treatment of the wetland sediment and the polluted water according to the heavy metal content index, and correspondingly filling the heavy metal restoration medicament into a first medicament bin (48) of the first partition wall (1) and a second medicament bin (24) of the second partition wall (2);
s3, forming a surrounding area by using a first baffle wall (1), a second baffle wall (2) and two green planting floating plates (3) in a heavy metal pollution area of the mangrove wetland deposit, wherein the first baffle wall (1) and the second baffle wall (2) are oppositely arranged, and the lower ends of the first baffle wall (1) and the second baffle wall (2) are inserted into bottom mud of the mangrove wetland;
s4, planting aquatic plants on the green planting floating plate (3), circulating the polluted water in the enclosure area by utilizing a water pumping tank (5) and a flow guide pipe (6) arranged between the first separation wall (1) and the second separation wall (2), and repairing the heavy metal pollution of the mangrove wetland sediments by using a heavy metal repairing agent and the aquatic plants.
2. The method for repairing a mangrove wetland sediment heavy metal contaminated damage according to claim 1, wherein the heavy metal repairing agent is a heavy metal remover.
3. The method for repairing damage to mangrove wetland sediments caused by heavy metal pollution according to claim 1, wherein said aquatic plant is any one or more of a submerged plant, an emergent aquatic plant or a floating leaf plant.
4. The method for repairing the heavy metal pollution damage of the mangrove wetland sediment according to claim 1, wherein the first baffle wall (1) is hollow, the inner side wall and the outer side wall of the first baffle wall (1) are respectively provided with an opening (11) for clamping a filter screen (12), the outer side wall of the first baffle wall (1) is provided with a water treatment tank (4) which is in sealing connection with the first baffle wall, and the water treatment tank (4) is communicated with the opening (11);
a plurality of stirring rods (41) arranged in the vertical direction are arranged in the water treatment tank (4), a first carrier plate (42) is arranged at the upper part in the water treatment tank (4) in the horizontal direction, the upper end of each stirring rod (41) penetrates through the first carrier plate (42) and is rotationally connected with the top surface of the water treatment tank (4), fluted discs (43) used for driving two adjacent stirring rods (41) are arranged on the stirring rods (41) above the first carrier plate (42), a main bevel gear (44) is arranged on the stirring rods (41) below the first carrier plate (42), and stirring blades are arranged at the lower ends of the stirring rods (41);
a plurality of scrapers (13) for scraping the filter screen (12) are arranged between the two filter screens (12), a plurality of pull rods (14) corresponding to the stirring rods (41) one by one are penetrated and arranged on the plurality of scrapers (13) along the vertical direction, a cam frame (15) is arranged at the upper end of each pull rod (14), a transmission rod (45) is arranged between each cam frame (15) and a corresponding main bevel gear (44), a second carrier plate (46) is arranged at the upper part in the water treatment tank (4) along the vertical direction, a secondary bevel gear (47) meshed with the main bevel gear (44) is arranged at one end of each transmission rod (45), a cam (16) matched and driven with the cam frame (15) is arranged at the other end of each transmission rod (45) and penetrates through the second carrier plate (46),
the top surface of the water treatment tank (4) is provided with a driving motor, and an output shaft of the driving motor penetrates through the top surface of the water treatment tank (4) and is fixedly connected with the upper end of any stirring rod.
5. The method for repairing the mangrove wetland sediment heavy metal pollution damage according to claim 4, wherein a plurality of first medicament bins (48) which are in one-to-one correspondence with stirring rods (41) are arranged on the inner wall of the upper part of the water treatment box (4), medicament outlets are arranged on the bottom surfaces of the first medicament bins (48), rotary discs (49) for controlling the opening and closing of the medicament outlets are sleeved on the stirring rods (41), and through holes matched with the medicament outlets in size are formed in the rotary discs (49).
6. The method for repairing damage caused by heavy metal pollution of mangrove wetland sediments according to claim 4, wherein the pumping tank (5) is provided with two groups, the first baffle wall (1) is provided with a supporting plate for placing the pumping tank (5), the pumping tank (5) is hollow and is internally provided with a first piston, the first piston is provided with at least one first piston rod, the lower end of the first piston rod is provided with a push plate (54) for contacting with the upper end of the cam frame (15),
the water pump is characterized in that a water inlet (51) and a water outlet (52) are respectively arranged on the upper parts of the side walls of the two sides of the water pump tank (51), the water inlet (51) stretches into the inner bottom of the water treatment tank (4) through a pipeline (53), the water inlet (51) is provided with a one-way valve for unidirectional inflow into the water pump tank (51), the water outlet (52) is in butt joint with the guide pipe (6), and the water outlet (52) is provided with a one-way valve for unidirectional inflow into the guide pipe (6).
7. The method for repairing the heavy metal pollution damage of the mangrove wetland sediment according to claim 6, wherein the included angle between the guide pipe (6) and the horizontal plane is 3-5 degrees, one end of the guide pipe (6) positioned at the high position is communicated with the water outlet (52) of the pumping water tank (51), one end of the guide pipe (6) positioned at the low position is provided with an elbow (61) used for extending into the second baffle wall (2), and the second baffle wall (2) is provided with a clamping block (26) used for fixing the guide pipe (6).
8. The method for repairing the heavy metal pollution damage of the mangrove wetland sediment according to claim 1, wherein the second baffle wall (2) is hollow and is internally provided with a liquid storage box (21) which is connected with the second baffle wall in a sliding sealing way, the inner side wall of the second baffle wall (2) is vertically provided with a plurality of medicine injection pipes (22) for injecting heavy metal repairing medicines into the wetland sediment, one end of each medicine injection pipe (22) is provided with a rotating block (23), the rotating block (23) is rotationally connected with a groove arranged on the inner side wall of the second baffle wall (2), the side surface of each medicine injection pipe (22) is provided with a plurality of sockets for inserting the wetland sediment,
the lower part in the second separation wall (2) is provided with a plurality of second medicament bins (24) which are in one-to-one correspondence with the medicament injection pipes (22), medicament outlets of the second medicament bins (24) are provided with hoses which are communicated with the interiors of the medicament injection pipes (22),
a pressing plate (25) for contacting with the bottom of the liquid storage box (21) is arranged above the top surface of the second medicament bin (24), a second piston rod is arranged on the pressing plate (25), the lower end of the second piston rod penetrates through the second medicament bin (24) and is provided with a second piston, a spring is sleeved on the second piston rod between the pressing plate (25) and the top surface of the second medicament bin (24),
the lower part of the side wall of the liquid storage box (21) is provided with a liquid outlet bar hole, and the side wall of the second baffle wall (2) is provided with a liquid guide bar hole which is matched with the liquid storage box (21) to slide downwards for butt joint.
9. The method for repairing the heavy metal pollution damage of the mangrove wetland sediments according to claim 1, wherein the bottom surfaces of the first baffle wall (1) and the second baffle wall (2) are respectively provided with an inserting rod for being inserted into the bottom mud of the mangrove wetland.
10. The method for repairing the heavy metal pollution damage of the mangrove wetland sediment according to claim 1, wherein a plurality of meshes are arranged at the bottom of the green planting floating plate (3), sliding blocks which are used for being in sliding connection with the first baffle wall (1) and the second baffle wall (2) are arranged on the side wall of the green planting floating plate (3), sliding rails which are in sliding connection with the sliding blocks are arranged on the first baffle wall (1) and the second baffle wall (2), and inserting rods are arranged on the bottom surfaces of the first baffle wall (1) and the second baffle wall (2).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310123347.4A CN117865355A (en) | 2023-02-16 | 2023-02-16 | Method for repairing heavy metal pollution damage of mangrove wetland sediment |
| JP2023065724A JP7351063B1 (en) | 2023-02-16 | 2023-04-13 | Method for remediating heavy metal pollution damage in mangrove wetland sediments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310123347.4A CN117865355A (en) | 2023-02-16 | 2023-02-16 | Method for repairing heavy metal pollution damage of mangrove wetland sediment |
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| CN117865355A true CN117865355A (en) | 2024-04-12 |
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| CN202310123347.4A Pending CN117865355A (en) | 2023-02-16 | 2023-02-16 | Method for repairing heavy metal pollution damage of mangrove wetland sediment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002052375A (en) * | 2000-08-09 | 2002-02-19 | Kurita Water Ind Ltd | Treatment agent for heavy metals in heavy metal- polluted soil or waste and heavy metal treatment method |
| JP4176383B2 (en) * | 2002-05-29 | 2008-11-05 | 日本基礎技術株式会社 | Purification method for contaminated ground and water circulation device used therefor |
| JP4948563B2 (en) * | 2009-05-19 | 2012-06-06 | 強化土エンジニヤリング株式会社 | Injection method and injection equipment |
| CN103999736B (en) * | 2014-05-19 | 2016-09-07 | 江苏大学 | A kind of estuarine wetland mangrove forest ecological repairs method of forestation |
| CN210632630U (en) * | 2019-05-16 | 2020-05-29 | 浙江省有色金属地质勘查局 | Electric repairing device for heavy metal contaminated soil |
| JP6739815B1 (en) * | 2019-09-02 | 2020-08-12 | 初雁興業株式会社 | Dredging system |
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- 2023-02-16 CN CN202310123347.4A patent/CN117865355A/en active Pending
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