CN114349285A - Method for restoring water body by using aquatic plants - Google Patents

Method for restoring water body by using aquatic plants Download PDF

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Publication number
CN114349285A
CN114349285A CN202210034123.1A CN202210034123A CN114349285A CN 114349285 A CN114349285 A CN 114349285A CN 202210034123 A CN202210034123 A CN 202210034123A CN 114349285 A CN114349285 A CN 114349285A
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Prior art keywords
plants
water
aquatic
planting
submerged
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CN202210034123.1A
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Chinese (zh)
Inventor
冯才声
黄学顺
许伟
颜晶晶
汪厚奎
皮杰
郭信波
周志国
汤圆圆
邹大庆
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Wuhan Xiugu Technology Co ltd
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Wuhan Xiugu Technology Co ltd
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Priority to CN202210034123.1A priority Critical patent/CN114349285A/en
Publication of CN114349285A publication Critical patent/CN114349285A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds

Abstract

The invention relates to the technical field of ecological restoration, in particular to a method for restoring a water body by using aquatic plants, which comprises the following steps: arranging a physical fence at the upstream of the polluted water area to intercept large-volume impurities, and putting a water body repairing agent into the polluted water area; arranging an artificial floating island in the midstream of a polluted water area, and arranging an adsorption layer below the liquid level of the artificial floating island; planting submerged plants and floating plants on the artificial floating island along the height direction; paving non-woven fabrics at the bottom of the downstream of the polluted water area to fix sludge, and alternately planting submerged plants and emergent plants on the non-woven fabrics; after the submerged plants and emergent aquatic plants survive, putting aquatic animals in the aquatic plants; maintaining, harvesting, salvaging and throwing in at regular intervals. The restoration method can be applied to rivers of wetland landscapes, namely, the middle-lower reaches or the lower reaches of a water area can be used as the wetland landscapes, the artificial floating island and the planted aquatic plants can be used as ornamental landscapes, and the restoration method can be used for people to enjoy and play and restoring the ecology of the water area.

Description

Method for restoring water body by using aquatic plants
Technical Field
The invention relates to the technical field of ecological restoration, in particular to a method for restoring a water body by using aquatic plants.
Background
Heavy metal pollution is highly destructive to the environment and has a great influence. Heavy metal pollution mainly includes soil pollution and water quality pollution, when the concentration of heavy metal in water source or soil exceeds a certain range, the heavy metal pollution can produce toxic effect on the ecological environment in the area, plants planted in the area can enrich heavy metal, the heavy metal content in the animal body in the water area is high, and the heavy metal can be continuously accumulated in the animal body and the human body through a food chain, so that the health of human body is influenced.
Phytoremediation is one of the ecological remediation techniques that can restore the ecology to an original state. For the restoration of water areas such as lakes and rivers, aquatic plants are mostly adopted for restoration, heavy metals in water are enriched through plants, water quality is improved, nitrogen, phosphorus and the like in water are reduced, the effect is good, the maintenance cost is low, and the ecology of the water areas restored by the aquatic plants can be restored to the original state.
However, the method for restoring the water body by using the aquatic plants is poor in restoration effect on rivers, long in restoration time, few in variety of the used aquatic restoration plants and low in ecological restoration efficiency.
Disclosure of Invention
The invention aims to provide a method for restoring water body by using aquatic plants, which utilizes physical fences, artificial floating islands and aquatic plants to restore the ecology of polluted flowing water areas, can fully purify the water quality, adsorb heavy metals in the water and restore the ecology quickly.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The embodiment of the invention provides a method for restoring a water body by using aquatic plants, which comprises the following steps:
arranging a physical fence at the upstream of the polluted water area to intercept large-volume impurities, and putting a water body repairing agent into the polluted water area;
arranging an artificial floating island in the midstream of a polluted water area, and arranging an adsorption layer below the liquid level of the artificial floating island; planting submerged plants and floating plants on the artificial floating island along the height direction;
paving non-woven fabrics at the bottom of the downstream of the polluted water area to fix sludge, and alternately planting submerged plants and emergent plants on the non-woven fabrics; after the submerged plants and emergent aquatic plants survive, putting aquatic animals in the aquatic plants;
regularly maintaining and harvesting the submerged plants, the floating plants and the emergent plants;
periodically salvaging and throwing the aquatic animals.
The invention mainly treats the river with slow flow rate, firstly, a physical fence is arranged at the upstream to clean pollutants on the river surface, and a water body repairing agent is matched to quickly repair the upstream water body, so that most of pollutants in water, such as suspended matters, organic matters and the like, can be quickly removed, the pH value of the water body is adjusted, the water body is preliminarily purified, and good conditions are provided for repairing aquatic plants at the middle and downstream.
The artificial floating island is arranged in the midstream, and is matched with the adsorption layer and the aquatic plants to adsorb heavy metal and nutrients in the water body so as to restore the ecology of the water body, and the aquatic plants are directly planted in the downstream so as to further restore the ecology of the water body.
The restoration method can be applied to rivers of wetland landscapes, namely, the middle-lower reaches or the lower reaches of a water area can be used as the wetland landscapes, the artificial floating island and the planted aquatic plants can be used as ornamental landscapes, and the restoration method can be used for people to enjoy and play and restoring the ecology of the water area.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
according to the invention, the physical fence is arranged at the upstream, larger impurities such as floaters and suspended matters in water are intercepted by the physical fence and combined with the water body restoration agent to primarily purify the water body, so that a good environment is improved for water quality treatment of the middle and downstream, and meanwhile, after the larger impurities are intercepted at the upstream, the phenomenon that the floaters and the like in water are attached to aquatic plants to influence the purification effect of the aquatic plants on the water quality can be effectively avoided; and the water quality can be clarified, so that the submerged plants in the middle and downstream have good light conditions.
Secondly, arranging an artificial floating island in the midstream of the water area, arranging an adsorption layer on the artificial floating island, and further adsorbing floating impurities in the water through the adsorption layer; planting submerged plants on the artificial floating island, absorbing heavy metals and nutrients in the water body through the submerged plants and the floating plants, and purifying the water body; the submerged plant is planted along the direction of height, can handle the water of co-altitude not, and overcome and lead to the waters middle part can not be purified because of the submerged plant height is limited, and the water direction of height purifies inhomogeneous defect, and then has improved the purification efficiency of submerged plant to the water.
Submerged plants, floating plants and emergent plants are planted at the downstream of the water area, the aquatic plants are utilized to further absorb heavy metals and nutrients in the water body, and the emergent plants are planted at the downstream, so that the oxygen content in the water area can be supplemented, oxygen is increased for animals and plants in the water area, and the ecological restoration is further assisted.
In the process of repairing the water body, the aquatic plants are maintained and harvested so as to ensure the normal growth of the aquatic plants and continuously repair the water body.
The ecological restoration method carries out ecological restoration on the flowing water area through physical interception, chemical restoration and aquatic animal and plant coordination, has high restoration speed, can restore the water body to the original ecology, and has small damage to the environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic top view of a river according to an embodiment of the present invention;
FIG. 2 is a schematic front view of an artificial floating island according to an embodiment of the present invention;
icon: 1-upstream, 2-midstream, 3-downstream, 4-artificial floating island, 41-positioning rod, 42-planting groove, 43-planting frame and 5-physical fence.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to specific examples.
The embodiment of the invention provides a method for restoring a water body by using aquatic plants, which comprises the following steps:
a physical fence 5 is arranged at the upstream 1 of the polluted water area to intercept large-volume impurities, and a water body repairing agent is put into the polluted water area;
an artificial floating island 4 is arranged in the midstream 2 of the polluted water area, and an adsorption layer is arranged below the liquid level of the artificial floating island 4; planting submerged plants and floating plants on the artificial floating island 4 along the height direction;
paving non-woven fabrics at the bottom of the downstream 3 of the polluted water area to fix sludge, and alternately planting submerged plants and emergent plants on the non-woven fabrics; after the submerged plants and emergent aquatic plants survive, putting aquatic animals in the aquatic plants;
regularly maintaining and harvesting the submerged plants, the floating plants and the emergent plants;
periodically salvaging and throwing the aquatic animals.
In some embodiments of the invention, the water remediation agent used comprises a flocculant, persulfate, activated carbon, alum, sodium carbonate/bicarbonate buffer salt system. The persulfate can be potassium persulfate, sodium persulfate, potassium hydrogen persulfate and sodium hydrogen persulfate, and the flocculant can be an organic polymeric flocculant or an inorganic polymeric flocculant. The persulfate which is put into the system has a strong oxidation effect, can oxidize organic matters in the water body and degrade the organic matters, the flocculant can adsorb suspended matters in the water body and precipitate the suspended matters in the water body, and the pH value of the water body can be adjusted by the sodium carbonate/sodium bicarbonate buffer salt system, so that the water body is prevented from being over-acid or over-alkali, and the normal growth of aquatic plants is ensured.
In some embodiments of the invention there are at least two physical barriers 5 upstream 1 of said polluted water area in the direction of the water flow, and emerging plants are planted between said physical barriers 5. Emergent aquatic plants refer to plants with roots growing in silt at the bottom of water and stems and leaves rising out of water, most of which grow in shallow water with a depth of 0.5-1.5m or on a wet shore. In some embodiments of the invention, the emergent aquatic plants are planted between the two physical fences 5, and stems of the emergent aquatic plants can be used for intercepting floating materials in the water area, on the other hand, stems, leaves and the like of the emergent aquatic plants can be used for beautifying the water area, and meanwhile, the emergent aquatic plants can also be matched with the water body repairing agent for repairing the upstream 1 water area.
In some embodiments of the invention, the submerged plants are planted at a density of 40-60 plants/m2
In some embodiments of the invention, the submerged plant is one or more of hornworts, algae, chrysanthemum indicum, and gynura segetum.
The Goldfish algae is submerged aquatic plant of Goldfish algae of Goldfish family. The whole plant is dark green, the stem is thin and soft, the branch exists, the leaf wheel grows, 6-8 leaves are produced in each round; no handle; the blade 2 has a branch or fine crack, and a splinter line shape with a thorn-shaped small tooth. The whole column is submerged in water, the growth and illumination are closely related, when the illumination is strong, the growth state is good, and when the illumination is weak, the growth state is poor, so that when submerged plants are planted, the goldfish algae are preferentially planted in the upper water area to provide good illumination for the goldfish algae. The demand of the golden fish algae on nitrogen elements is high, and when the nitrogen content in the water body is high, the golden fish algae grows well, so that the golden fish algae can be used for absorbing the nitrogen elements in the water body, reducing the nitrogen content in the water body, removing nutrient and oxidizing, and purifying the water quality.
The Nemacystus decipiens is a perennial submerged herbaceous plant, the plant is thick, soft and cylindrical, the plant height is 40-180 cm, and the Nemacystus decipiens can grow in fresh water with high hardness and can grow in a weak acid or weak alkali environment. After the water folium Nemacystus Decipiens adapts to the growth environment, the water folium Nemacystus Decipiens can be rapidly propagated in large quantities, and has positive effect on water purification, but in the process of repairing water, the water folium Nemacystus Decipiens needs to be periodically harvested to avoid excessive growth of water folium Nemacystus Decipiens and influence on the growth of other aquatic plants.
The hydrilla verticillata is a perennial submerged herbaceous plant, the stem of which is elongated and has branches, the stem is cylindrical, and the surface of the stem has longitudinal fine ridges and is crisp. The dormant buds of the hydrilla verticillata are long ovate, have a plurality of bracts, are spirally and closely arranged, are white or light yellow green, and are in a shape from narrow needles to needles. The hydrilla verticillata grows in fresh water, is fond of an environment with sufficient illumination, is fond of warmth and cold resistance, grows well in a temperature range of 15-30 ℃, the overwintering temperature is not lower than 4 ℃, and when the hydrilla verticillata is not illuminated sufficiently, the hydrilla verticillata grows limitedly and leaves are aged. In the invention, the water quality of the water area is clear through the physical fence 5 and the water restoration agent at the upstream 1, and a good growth environment is provided for the hydrilla verticillata.
The eyedrops are perennial aquatic herbs. The rhizome of the eyedrops is developed, the diameter is 1.5-2mm, the stem is provided with a plurality of branches, spindle-shaped dormant buds can be formed at the top of the stem, and fibrous roots are arranged at the joints of the stem. The leaf of herba Eupatorii can be divided into floating leaf and submerged leaf, the leaf of the floating leaf is needle-shaped, wide needle-shaped or egg-shaped needle-shaped, the leaf is 2-10 cm long and 1-4 cm wide, the tip is sharp or blunt, the base is blunt or sometimes nearly wedge-shaped, and the leaf has a handle of 5-20 cm long. The leaves of the water-logging are in a shape of a needle to a narrow needle, the length is 2-7 cm, the top end is sharp, and the leaves of the water-logging are in a sheath shape and embrace the stem. The eyedrops are common malignant weeds in the rice field, are strong in life, vigorous in growth and high in propagation speed, and therefore when the eyedrops are used as water body restoration plants, the eyedrops need to be harvested periodically to reduce the plant density of the eyedrops.
In some embodiments of the present invention, the above-mentioned Goldfish algae and Nemacystus decipiens are planted at a density of 3-4 buds/clump, 20-30 clumps/m2(ii) a The planting density of the hydrilla verticillata is 10-15 buds/clump and 8-10 clumps/m2(ii) a The planting density of the eyeweed is 30-40 plants/m2
In some embodiments of the invention, the water plant further comprises duckweed, said duckweed being planted at a density of 80-120 plants/m2
The duckweed is a floating water plant with symmetrical leaf shape, green surface, nearly circular shape, inverted oval shape or inverted oval shape, full margin, slightly convex upper surface or raised along the midline, no obvious pulse, white root, blunt root cap, and no wing in root sheath. The capsule is arranged on the back side of the frond, and the new frond forms a floating in the capsule, is connected with the parent body by a very short thin handle and then falls off. The leaves of the duckweed are spread on the water surface, have certain ornamental value, and can absorb nitrogen in water under the photosynthesis to play a role in purifying water quality.
In some embodiments of the invention, the water plants are one or more of water lily, water lily and water hyacinth.
In some embodiments of the invention, the emergent aquatic plant is one or more of canna, drooping grass, and loosestrife. The planting density is 4-8 plants/m2
In some embodiments of the present invention, the artificial floating island 4 includes a positioning rod 41 vertically arranged and a planting frame 43 horizontally arranged, the positioning rod 41 is provided with a plurality of planting grooves 42 at intervals along a height direction, submerged plants are planted in the planting grooves 42, and floating plants are planted in the planting frame 43.
Through set up planting groove 42 on locating lever 41 to plant benthophyte in planting groove 42, make benthophyte along direction of height distribution, usable not same height's benthophyte purifies not co-altitude quality of water, in order to improve the purification efficiency of aquatic plant to the water.
In some embodiments of the present invention, the absorption layer is disposed on the outer wall of the positioning rod 41. The outer wall of the positioning column is provided with an adsorption layer which can adsorb suspended substances in a water area, purify water quality and improve the growth environment of submerged plants.
In some embodiments of the present invention, the adsorption layer is an activated carbon layer or a porous ceramic particle layer.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides an artificial floating island 4, which is shown in fig. 1 and comprises a positioning rod 41 arranged vertically and a planting frame 43 arranged horizontally, wherein the positioning rod 41 is provided with a plurality of planting grooves 42 at intervals along the height direction, soil is placed in the planting grooves 42, and fixing mechanisms for fixing submerged plants are arranged in the planting grooves 42; an activated carbon adsorption layer is provided on the outer wall of the positioning rod 41.
In other embodiments of the present invention, the activated carbon adsorption layer may be replaced with other adsorption materials according to the pollution source of the water body.
When the artificial floating island 4 is used, corresponding submerged plants are planted in the planting groove 42, the floating plants are planted in the planting frame 43 which is horizontally arranged, and then the positioning rod 41 of the artificial floating island 4 is fixed on the riverbed in the water area, so that the whole artificial floating island 4 is submerged in water, and partial stems and leaves of the floating plants are ensured to be positioned on the water surface.
Example 2
A certain inland river in south is selected, the flow speed of the river is 0.2-0.4m/s, the total length of the river is 120m, the deepest part of the river is 45cm, and the widest part of the river surface is 4.5 m.
A plurality of water quality detection points are respectively arranged at the upstream 1, the midstream 2 and the downstream 3 of the river to detect the heavy metal content and the content of rich nutrient elements in water quality. The elemental contents of the water in each section of the river prior to the aquatic plant restoration are shown in Table 1.
TABLE 1 river contaminant concentration before remediation
Two sections of physical fences 5 are arranged at the upstream 1 of the river channel along the water flow direction, the distance between the two sections of physical fences 5 is 10m, canna is planted between the two physical fences 5, and the planting density is 5 plants/m2. On the 10 th day after planting, putting a water body repairing agent into water for the first time; the water body repairing agent comprises 50% of potassium hydrogen persulfate, 5% of flocculating agent, 20% of sodium carbonate/sodium bicarbonate buffer salt system, 10% of active carbon and 15% of alum by mass fraction, and the adding concentration of the water body repairing agent is 80 ppm.
The artificial floating island 4 of example 1 was installed in the midstream 2 of the polluted water area, and a plurality of artificial floating islands 4 were installed at intervals in the width direction of the river surface, and a plurality of artificial floating islands 4 were also installed in the water flow direction, and the length of the river course where the artificial floating island 4 was installed was 40 m. In the front 20m river reach near the upstream 1, the planting groove 42 of the artificial floating island 4 is planted with goldfish algae and water-retaining grass, the goldfish algae is planted on the upper part of the positioning rod 41, the water-retaining grass is planted on the lower part of the positioning rod 41, and the planting frame 43 is planted with water lily; in a 20m river section near the downstream 3, hydrilla verticillata and eyedrops are planted in a planting groove 42 of an artificial floating island 4 arranged on the artificial floating island, the eyedrops are planted on the upper portion of a positioning rod 41, the hydrilla verticillata is planted on the upper portion of the positioning rod 41, and water lettuce is planted in a planting frame 43. After the submerged plants and the floating plants in the midstream 2 river reach survival, the duckweeds are thrown in the midstream 2 river reach 15 days after the artificial floating island 4 is installed.
Wherein the length of the river section provided with the artificial floating island 4 is 50m, and adjacent artificial islands are arranged along the water flow directionThe interval of the floating island 4 is 4m, the planting density of the submerged plants on the artificial floating island 4 is 3-4 buds/clump, 25 clumps/m2The planting density of water lily and water lily is 1-2 heads/m2The density of the duckweed is 60 strains/m2
Paving non-woven fabrics on a riverbed at the downstream 3 of the polluted water area to fix sludge, and alternately planting the eyedrops and canna on the non-woven fabrics, wherein the planting density of the canna is 8 plants/m2The planting density of the eyedrops is 40 plants/m2And after the eyedrops and canna survive, the apple snails, the field snails and the silver carps are thrown into the water area. And a physical barrier is placed in the downstream 3 waters to prevent aquatic animals from being lost or escaping from the water.
And after the river is treated, the submerged plants, the floating plants and the emergent plants are maintained regularly, when the aquatic plants die, the plants are supplemented in time, and when the aquatic plants grow vigorously, the aquatic plants are harvested in time so as to ensure that the density of the aquatic plants is within the range.
Similarly, the aquatic animals are salvaged and thrown in a regular mode, when the aquatic animals die, the aquatic animals need to be supplemented in time, and when the aquatic animals are bred excessively, the aquatic animals need to be timely fished to avoid the influence on the growth of other aquatic animals and aquatic plants due to overlarge density.
After 6 months of restoration, the pollutant concentration of each section of the river channel is detected, and the results are shown in table 2.
TABLE 2 pollutant concentrations at sections of the river after remediation
In table 1 and table 2, the sampling method of each river reach is as follows: on the same day, respectively sampling the water quality of each river reach, and respectively sampling at three positions at the beginning of the river course and the same width, wherein the sampling methods of the middle section of the river course and the end of the river course are the same; samples taken at each sampling point were divided into 3 groups, and the concentrations of the respective substances were measured, and then the average values thereof were calculated as the concentrations in the table.
From the above table 2, it can be seen that at the beginning of the river, the content of each pollutant is higher, and at the middle section of the river, the content of each pollutant is reduced by the treatment of the water restoration agent and the aquatic plants, which indicates that the water quality of the river is obviously improved after the treatment of the upstream 1 and the midstream 2 of the river; the content of the measured pollutants is further reduced at the end point of the river, which shows that the water quality at the end point of the river is greatly improved through the repair of aquatic plants at the middle and lower reaches 3, and shows that the repair method of the invention has a positive effect on the repair of the water body.
Specifically, in the embodiment, the physical fence 5 is arranged at the upstream 1, larger impurities such as floaters and suspended matters in water are intercepted by the physical fence 5 and combined with the water body restoration agent to primarily purify the water body, so that a good environment is improved for water quality treatment of the middle and downstream 3, and after the larger impurities are intercepted at the upstream 1, the phenomenon that the floaters and the like in the water are attached to aquatic plants to influence the purification effect of the aquatic plants on the water quality can be effectively avoided; and the water quality can be clarified, so that the submerged plants in the middle and lower reaches 3 have good illumination conditions.
Secondly, an artificial floating island 4 is arranged in the midstream 2 of the water area, an activated carbon adsorption layer is arranged on the artificial floating island 4, and floating impurities in the water are adsorbed by the activated carbon adsorption layer, so that the water quality is clear, and good illumination is provided for submerged plants; planting submerged plants on the artificial floating island 4, absorbing heavy metals and nutrients in the water body through the submerged plants and the floating plants, and purifying the water body; the submerged plant is planted along the direction of height, can carry out purification treatment to the water of co-altitude not, and overcome and lead to the waters middle part can not purified because of the submerged plant height is limited, and the water direction of height purifies inhomogeneous defect, and then has improved the purification efficiency of submerged plant to the water.
Submerged plants, floating plants and emergent plants are planted at the downstream 3 of the water area, the aquatic plants are utilized to further absorb heavy metals and nutrients in the water body, and the emergent plants are planted at the downstream 3, so that oxygen content in the water area can be supplemented, oxygen is increased for animals and plants in the water area, and ecological restoration is further assisted.
In the process of repairing the water body, the aquatic plants are maintained and harvested so as to ensure the normal growth of the aquatic plants and continuously repair the water body.
The ecological restoration method carries out ecological restoration on the flowing water area through physical interception, chemical restoration and aquatic animal and plant coordination, has high restoration speed, can restore the water body to the original ecology, and has small damage to the environment.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (10)

1. A method for aquatic phytoremediation of a body of water, comprising:
arranging a physical fence at the upstream of the polluted water area to intercept large-volume impurities, and putting a water body repairing agent into the polluted water area;
arranging an artificial floating island in the midstream of a polluted water area, and arranging an adsorption layer below the liquid level of the artificial floating island; planting submerged plants and floating plants on the artificial floating island along the height direction;
paving non-woven fabrics at the bottom of the downstream of the polluted water area to fix sludge, and alternately planting submerged plants and emergent plants on the non-woven fabrics; after the submerged plants and emergent aquatic plants survive, putting aquatic animals in the aquatic plants;
regularly maintaining and harvesting the submerged plants, the floating plants and the emergent plants;
periodically salvaging and throwing the aquatic animals.
2. The method of claim 1, wherein there are at least two physical barriers upstream of the polluted water along the direction of water flow, and emergent aquatic plants are planted between the two physical barriers.
3. The method for remediating a body of water with aquatic plants of claim 1, wherein the submerged plants are one or more of hornworts, algae, hydrilla verticillata, and eyeweed.
4. The method for remediating a body of water with aquatic plants of claim 3, wherein the Dendrobii angusticeps and Nemacystus decipiens are planted at a density of 3-4 buds/clump, 20-30 clumps/m2(ii) a The planting density of the hydrilla verticillata is 10-15 buds/clump and 8-10 clumps/m2(ii) a The planting density of the eyeweed is 30-40 plants/m2
5. The method for aquatic phytoremediation of a body of water of claim 1, wherein said water-floating plants are one or more of water lily, water lettuce and water hyacinth.
6. The method for remediating a body of water with aquatic plants as recited in claim 5, wherein the density of the floating plants is 1-2 plants/m2
7. The method for aquatic phytoremediation of a body of water of claim 5, wherein said water plants further comprise duckweed, said duckweed being planted at a density of 50-80 plants/m2
8. The method for aquatic phytoremediation of a body of water of claim 1 wherein the emergent aquatic plant is one or more of canna, droughhaired clover, and loosestrife.
9. The method for restoring a water body by using aquatic plants according to claim 1, wherein the artificial floating island comprises a positioning rod vertically arranged and a planting frame horizontally arranged, the positioning rod is provided with a plurality of planting grooves at intervals along the height direction, submerged plants are planted in the planting grooves, and floating plants are planted in the planting frame.
10. The method for remediating a body of water with aquatic plants as recited in claim 9, wherein the adsorption layer is disposed on an outer wall of the positioning rod.
CN202210034123.1A 2022-01-12 2022-01-12 Method for restoring water body by using aquatic plants Pending CN114349285A (en)

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Citations (6)

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