Phosphorus removal ecological floating bed and application thereof

Abstract

The invention relates to the technical field of water ecological restoration, in particular to a phosphorus removal ecological floating bed and application thereof. A matrix of the phosphorus removal ecological floating bed adopts a Fe-loaded sulphoaluminate cement-based material, and a phosphorus hyperaccumulator adopts Artemisia indica. The synergistic effect of the matrix and the plant improves the phosphorus removal effect: in the physical level, the matrix quickly adsorbs dissolved phosphorus to form a temporary phosphorus storage library, and organic acids such as citric acid secreted by the root system of the Artemisia indica plant can activate the matrix to fix phosphorus and promote absorption; in the chemical level, Fe < 3 + > reduction occurs on the iron-based matrix in a rhizosphere anoxic microenvironment, and bound phosphorus is released for plants to use, so that secondary pollution is avoided; in a biological level, phosphate solubilizing bacteria enriched on a root-matrix interface can degrade organic phosphorus, and the dirt-removing power of the system is remarkably improved. In addition, the artemisia indica is not prone to lodging, and the labor cost of later maintenance can be reduced. In addition, the Artemisia indica has medicinal value, so that the Artemisia indica can be used or sold as a medicinal material after growing mature on the floating bed, and the added value is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water ecological restoration, in particular to a phosphorus removal ecological floating bed and application thereof. Background Art

[0002] The in-situ water remediation technology of the Ecological Floating Bed (EFB) has unique advantages in the remediation of phosphorus-contaminated water bodies. Due to its flexible operation, no additional land occupation, and wave elimination, the ecological floating bed is widely used in areas such as reservoirs, lakes, and swamps where it is difficult to restore the shore aquatic plant belt due to waves, or in closed waters with landscape requirements. However, the traditional floating bed technology for phosphorus removal mostly relies on the absorption effect of enriched plants, and the deep purification effect is poor. In order to improve the phosphorus removal effect, there is a technical solution in the related technology that uses materials with phosphorus removal effects as a matrix. However, studies have found that although the addition of phosphorus removal matrix can significantly enhance the pollution removal performance of the floating bed, the local water acidification caused by the gradual decomposition of organic matter and adsorption saturation will lead to the release of phosphorus in the matrix, affecting the stability of phosphorus removal by the ecological floating bed. Summary of the Invention

[0003] In order to solve or partially solve the problems existing in the related art, the present invention provides a phosphorus removal ecological floating bed and application thereof.

[0004] The invention provides a phosphorus removal ecological floating bed, the matrix of which adopts Fe-loaded sulphoaluminate cement-based material, and the phosphorus hyperaccumulation plant adopts Artemisia mays.

[0005] Furthermore, it specifically includes:

[0006] A floating plate base is provided with a storage hole;

[0007] The plant pot has a bottom through which a storage hole is formed, and a top edge is clamped above the storage hole;

[0008] The substrate is arranged in the plant pot and / or is hung around the plant pot;

[0009] May mugwort, its roots are planted in the plant pot.

[0010] Furthermore, there are multiple storage holes, which are evenly arranged on the floating plate base, and the density of the storage holes is 6-12 holes / m 2 , and / or, the plant pot has an upper diameter of 14-18 cm, a lower diameter of 10-15 cm, and a height of 10-18 cm.

[0011] Furthermore, the planting quantity of each plant pot is 2-6 plants / pot.

[0012] Furthermore, the dosage of the substrate is 1-4 kg / pot.

[0013] Furthermore, the substrate is hung around the plant pot specifically as follows:

[0014] The phosphorus removal ecological floating bed also includes a hanging net bag, the top of which is fixed by a floating plate base and the bottom is a free hanging end;

[0015] The matrix is ​​in block or ball shape and is installed in the mesh bag.

[0016] Furthermore, each hanging mesh bag is provided with substrates of three sizes, namely: a small substrate of 1-2 cm in size, a medium substrate of 2-3 cm in size, and a large substrate of 4-5 cm in size; the size is the maximum side length or diameter.

[0017] Furthermore, the floating board substrate is a foam board, a plastic frame, or is made of a PVC pipe.

[0018] The present invention also provides an application of the above-mentioned phosphorus removal ecological floating bed in water ecological restoration.

[0019] Furthermore, the coverage rate of the phosphorus removal ecological floating bed is 2-5%.

[0020] The phosphorus removal ecological floating bed provided by the present invention may have the following beneficial effects:

[0021] 1. The substrate of the phosphorus removal ecological floating bed is made of Fe-loaded sulfoaluminate cement-based material, and the phosphorus hyperaccumulator is Artemisia annua. The synergistic effect of the substrate and the plant improves the phosphorus removal effect: physically, the substrate quickly absorbs dissolved phosphorus to form a "temporary phosphorus storage", and organic acids such as citric acid secreted by the roots of Artemisia annua can activate the substrate to fix phosphorus and promote absorption; chemically, the iron-based substrate produces Fe in the rhizosphere hypoxic microenvironment. 3+ Reduction releases bound phosphorus for plant use, avoiding secondary pollution; at the biological level, phosphate-solubilizing bacteria enriched at the root-matrix interface can degrade organic phosphorus, significantly improving the system's decontamination capacity.

[0022] 2. May wormwood is not prone to lodging, thus reducing labor costs for subsequent maintenance. May wormwood also has medicinal value. Therefore, after it matures on the floating bed, it can be used as a medicinal material or sold, which has high added value.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0025] Figure 1 3D schematic diagram of the filled phosphorus removal ecological floating bed according to an embodiment of the present invention;

[0026] Figure 2 1. It is a structural schematic diagram of a floating bed module of a suspended phosphorus removal ecological floating bed in an embodiment of the present invention;

[0027] Figure 3 2. It is a structural schematic diagram of a floating bed module of a filled phosphorus removal ecological floating bed in an embodiment of the present invention;

[0028] Figure 4 (a) is the plant's reaction to H2PO4 - The change in the absorption rate, (b) is the plant's absorption of H2PO4 - Double reciprocal fitting line of absorption;

[0029] Figure 5 It is the form of phosphorus in calamus and mugwort;

[0030] Figure 6 This is a bar graph of phosphorus extraction from different phosphorus removal ecological floating beds;

[0031] Figure 7 It is an indication diagram of the sampling points in the embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1-Floating plate base

[0034] 2-Plant pot

[0035] 3-Matrix

[0036] 4-May Artemisia

[0037] 5-Hanging mesh bag DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0040] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0041] The invention provides a phosphorus removal ecological floating bed, the matrix of which adopts Fe-loaded sulphoaluminate cement-based material, and the phosphorus hyperaccumulation plant adopts Artemisia mays.

[0042] The phosphorus removal effect of the ecological floating bed is mainly achieved by phosphorus hyperaccumulator plants, which efficiently absorb and transport excess phosphorus to the aboveground part through their root system, thereby alleviating the phosphorus runoff and water eutrophication problems caused by non-point source pollution. At present, the commonly used phosphorus hyperaccumulator plants are mainly aquatic plants such as calamus and reed. The inventors of this application have found through research that the bottleneck problem restricting the deep purification of the ecological floating bed is that the phosphorus concentration in the overlying water (1-10μM) is 100 times lower than the optimal phosphorus concentration for plant growth. Nutritional deficiency will hinder the growth of plants and produce a large amount of reactive oxygen species that are harmful to plant development, which limits the effective absorption of phosphorus by plant roots.

[0043] Traditional substrates primarily serve to anchor plants, but their quality also needs to be considered. While some substrates can act as adsorbents, their effectiveness at enriching phosphorus is limited. To address this issue, the inventors first considered improving the substrate. By leveraging its phosphorus-enriching properties, they could increase the phosphorus concentration in the overlying water, thereby enhancing its phosphorus treatment efficiency.

[0044] The Fe-loaded sulfoaluminate cement-based material FSC is a solid phosphorus removal matrix that can be directly added to the bottom of the lake, or put into a mesh bag or plastic basket and then sunk to the bottom of the lake. It can also be used as a filler for artificial wetlands. The powdered state can be used as a filter material, such as a wetland filler in an artificial wetland or as a phosphorus removal medium in a filtration device. The inventors of the present application have discovered that it can be used as a matrix for an ecological floating bed. By utilizing the floating properties of the floating bed, its original working area can be changed and it can be transferred from the bottom of the water body to the overlying water area. That is, the floating bed gives the matrix the property of floating, and the matrix gives the floating bed the property of enriching P. The two cooperate with each other to achieve an increase in the P concentration in the overlying water.

[0045] The Fe-loaded sulphoaluminate cement-based material comprises an inorganic gelling material, a retarder, an inorganic porous material, a pore-forming agent and a phosphorus removal material, wherein the phosphorus removal material comprises polymeric ferric sulfate, magnesium sulfate and lanthanum oxide.

[0046] Preferably, the Fe-loaded sulphoaluminate cement-based material comprises:

[0047] 20-30 parts by weight of hydrogel material;

[0048] Retarder 0.04-0.1 parts by weight;

[0049] 15-30 parts by weight of inorganic porous material;

[0050] 1-5 parts by weight of pore-forming agent;

[0051] 10.1-20.5 parts by weight of phosphorus removal material.

[0052] More preferably, the Fe-loaded sulphoaluminate cement-based material comprises:

[0053] 20-30 parts by weight of hydrogel material;

[0054] Retarder 0.1-0.1 parts by weight;

[0055] 5-10 parts by weight of bentonite;

[0056] Diatomaceous earth parts by weight;

[0057] Zeolite powder parts by weight;

[0058] parts by weight of sawdust; 5-10 parts by weight of polyferric sulfate;

[0059] 5-10 parts by weight of magnesium sulfate;

[0060] Lanthanum oxide 0.1-0.5% by weight.

[0061] Specifically, the above-mentioned inorganic gelling material is preferably one or a mixture of silicate cement, aluminate cement, sulfoaluminate cement, fluoroaluminate cement and ferroaluminate cement; the above-mentioned retarder is preferably one or a mixture of sodium citrate, oxalic acid, tartaric acid, boric acid and salicylic acid; the above-mentioned inorganic porous material is preferably one or a mixture of bentonite, diatomaceous earth and zeolite powder; the above-mentioned pore-forming agent is one or a mixture of sawdust, angiosperm husk powder and crop straw powder.

[0062] The Fe-loaded sulphoaluminate cement-based material can be prepared according to the following method:

[0063] Step a), mixing the above raw materials uniformly;

[0064] Step b), adding water and stirring, wherein the weight ratio of the total amount of raw materials to water is 1:0.1-0.5; stirring until a micro-fluidic colloidal state is formed;

[0065] Step c) filling the colloidal substance into a mold, allowing it to stand, then demoulding and curing to obtain the Fe-loaded sulphoaluminate cement-based material.

[0066] Preferably, in step a), the inorganic porous material in the raw material is pre-sieved with a 200-mesh sieve. In step c), the standing time is 2-24 hours, and the curing time is 1-7 days.

[0067] Using Fe-loaded sulfoaluminate cement-based material FSC as a matrix has the following effects:

[0068] 1. In this material, after the metal ions combine with phosphate, they can continuously generate insoluble metal phosphate substances and precipitate inside the network structure, forming a concentration difference between the inside and outside of the particles. Phosphate continuously enters the interior of the particles, and the phosphorus removal efficiency is high.

[0069] 2. This material locks the phosphorus removal substances and the stable insoluble substances formed with phosphorus elements in water inside the product particles, thereby preventing phosphate from returning to the water.

[0070] 3. The material can be processed into products of different shapes and sizes according to the shape of the mold, making its application more flexible and the cost lower.

[0071] When using an Fe-loaded sulfoaluminate cement-based material as a matrix, the applicants discovered that its phosphorus removal efficiency was still limited. Subsequently, the inventors discovered that Artemisia mays has an amphibious life history strategy and combines the dual characteristics of high biomass and high phosphorus accumulation. Using Artemisia mays as a phosphorus hyperaccumulator, the two can work together to further enhance phosphorus removal efficiency.

[0072] Furthermore, compared to aquatic plants like calamus, mugwort is less likely to fall over, thus reducing labor costs for subsequent maintenance. Mugwort also has medicinal properties: it warms the meridians and stops bleeding, dispels cold and relieves pain, removes dampness and relieves itching, and warms the kidneys and strengthens yang. It can be used to treat bleeding during pregnancy, menstrual irregularities, cholera cramps, kidney deficiency, back pain, and yang deficiency and internal cold. Therefore, once mugwort matures on the floating bed, it can be used as a medicinal herb or sold, offering significant added value.

[0073] See Figure 1 The structure of the phosphorus removal ecological floating bed provided in a preferred embodiment of the present application specifically includes:

[0074] The floating plate base 1 is provided with a storage hole;

[0075] The plant pot 2 has a bottom through which a storage hole is formed, and a top edge is clamped above the storage hole;

[0076] The substrate 3 is arranged in the plant pot 2 and / or is hung around the plant pot;

[0077] Artemisia sempervirens 4, the roots of which are planted in plant pots 2.

[0078] The above-mentioned floating plate base 1 is used to fix and support the plant pot 2 and provide buoyancy so that the entire floating bed system floats on the water surface. The floating plate base 1 can be made of foam board, plastic frame, or made of PVC pipe. The placement holes opened in the floating plate base 1 are used to place the plant pot 2. Preferably, there are multiple placement holes, and they are evenly arranged on the floating plate base, with a placement density of 6-12 holes / m 2 , the most preferred is 9 holes / m 2 .

[0079] Plant pots 2 are used to secure plants. Preferably, they have an upper diameter of 14-18 cm, a lower diameter of 10-15 cm, and a height of 10-18 cm. Most preferably, the upper diameter of the plant pots is 16 cm, the lower diameter is 12 cm, and the height is 14 cm. Artemisia sempervirens, a phosphorus hyperaccumulator, is planted in plant pots 2. Each plant pot is preferably planted with 2-6 plants per pot, and most preferably with 4 plants per pot.

[0080] The amount of the above-mentioned substrate is preferably 1-4 kg / basin, and most preferably 1.5 kg / basin. Figure 1 As shown, the substrate can be placed in the plant pot 2 as a filler to obtain a filled phosphorus removal ecological floating bed; it can also be hung around the plant pot 2 to obtain a suspended phosphorus removal ecological floating bed. Of course, the two can also be combined, that is, the substrate is both filled in the plant pot 2 and hung around the plant pot 2.

[0081] See Figure 2 , for the substrate hanging around the plant pot, specifically:

[0082] The phosphorus removal ecological floating bed also includes a hanging net bag 5 , the top of which is fixed by the floating plate base 1 and the bottom is a free hanging end; the matrix 3 is in block or spherical shape and is installed in the net bag 5 .

[0083] To facilitate the securement of the hanging mesh bags 5, the floating plate base 1 is preferably provided with fixing holes or hooks for securing the mesh bags 5. As a preferred embodiment of this embodiment, each hanging mesh bag 5 is provided with three sizes of substrates: a small substrate of 1-2 cm, a medium substrate of 2-3 cm, and a large substrate of 4-5 cm. These sizes are defined as the maximum side length or diameter. The hanging mesh bags 5 can be arranged in a multi-layer structure from top to bottom to accommodate multiple layers of substrate 3, thereby extending the longitudinal arrangement width of the substrate 3.

[0084] Preferably, the filled / suspended dephosphorus ecological floating bed can be formed by combining several floating bed modules, thereby increasing the flexibility of use. The floating bed modules can be assembled and fixed by fasteners such as connecting ropes, screws or bolts, or assembled and fixed by means of snap-on connection, plug-in connection, etc. Figure 2 As shown, the floating bed module of the filled phosphorus removal ecological floating bed is as follows Figure 3 During use, those skilled in the art can assemble the floating bed modules according to the required size based on the working conditions such as the water area.

[0085] The phosphorus removal ecological floating bed provided in the embodiment of the present application has the following advantages:

[0086] 1. The substrate of the phosphorus removal ecological floating bed is made of Fe-loaded sulfoaluminate cement-based material, and the phosphorus hyperaccumulator is Artemisia annua. The synergistic effect of the substrate and the plant improves the phosphorus removal effect: physically, the substrate quickly absorbs dissolved phosphorus to form a "temporary phosphorus storage", and organic acids such as citric acid secreted by the roots of Artemisia annua can activate the substrate to fix phosphorus and promote absorption; chemically, the iron-based substrate produces Fe in the rhizosphere hypoxic microenvironment. 3+ Reduction releases bound phosphorus for plant use, avoiding secondary pollution; at the biological level, phosphate-solubilizing bacteria enriched at the root-matrix interface can degrade organic phosphorus, significantly improving the system's decontamination capacity.

[0087] 2. May wormwood is not prone to lodging, thus reducing labor costs for subsequent maintenance. May wormwood also has medicinal value. Therefore, after it matures on the floating bed, it can be used as a medicinal material or sold, which has high added value.

[0088] Another embodiment of the present invention further provides an application of the above-mentioned phosphorus removal ecological floating bed in water ecological restoration. The coverage rate of the phosphorus removal ecological floating bed is preferably 2-5%, and most preferably 3%.

[0089] The technical solution of the present invention will be further described below in conjunction with specific embodiments:

[0090] The origin of the Artemisia maysii in the following embodiments is the phosphogypsum tailings pond of Xinyangfeng Fertilizer Co., Ltd. (longitude 111.43°E, latitude 30.62°N, 137.93 meters above sea level).

[0091] Example 1 Performance Verification of May Artemisia

[0092] 1. Phosphorus enrichment coefficient and mobility

[0093] The phosphorus enrichment coefficient and mobility of Artemisia sempervirens were calculated according to the following formula

[0094] Phosphorus enrichment coefficient = phosphorus content in the aboveground or underground parts of the plant / phosphorus content in the soil;

[0095] Translocation = shoot phosphorus accumulation / whole plant phosphorus accumulation x 100%;

[0096] Shoot phosphorus content = plant shoot phosphorus content / plant mass, g / kg;

[0097] Biomass, g; shoot height, cm;

[0098] The calculated phosphorus enrichment coefficient of Artemisia indica is 5.43 for the shoot and 3.24 for the root, and the translocation rate is 85.39%.

[0099] 2. Laboratory plant root dynamics determination and analysis

[0100] Absorption kinetics parameters reflect the size of phosphorus affinity and absorption rate, which can evaluate the adaptability of plants to nutrient-polluted water bodies and the value of repair application:

[0101] The Michaelis-Menten equation is the core model of enzyme reaction kinetics, which is used to describe the relationship between reaction rate V and substrate concentration S. Among them, Vmax is the maximum reaction rate; Km is the Michaelis constant.

[0102] Michaelis-Menten equation: V = V max S / (K m+ S); V max The greater the value, the faster the plant absorbs H2PO4 - ; The smaller the Km, the stronger the plant's affinity for phosphorus;

[0103] See Figure 4 , the correlation coefficient of Michaelis-Menten equation is as follows:

[0104] R 2 = 0.9457; V max = 0.004280; K m = 20.01;

[0105] V = 0.0043S / (20.01+S)

[0106] From the above, the absorption rate of Artemisia indica increases with the increase of concentration, and K m is large, indicating low phosphorus affinity, which has the potential for high-concentration phosphorus-polluted water body repair. According to the results and the actual situation of phosphorus-polluted water bodies, the PO4 3- concentration of subsequent greenhouse hydroponic experiments is set to 0.05 m·mol / L, 0.5 m·mol / L and 5.0 m·mol / L. -1 -1 -1 ​​​

[0107] 3. Hydroponic test verifies stable aquatic performance and phosphorus enrichment capacity

[0108] The hydroponic experiment was conducted with three phosphorus treatments: 0.05 (control), 0.5 (normal phosphorus supply), and 5 m·mol L -1 (High phosphorus), regulated by adding KHPO. The basal culture medium was a modified Hoagland nutrient solution (without KHPO, pH 5.8). Two plants (Artemisia sempervirens and Acorus calamus as controls) were selected for uniform seedling cultivation and transplanted into a black 3-liter bucket. They were pre-cultured for 10 days (using 1 / 2 Hoagland nutrient solution) and then transferred to culture medium containing different phosphorus treatments. Each treatment was balanced by adding KSO to balance the K introduced by KHPO. + All treatments were replicated nine times in a completely randomized pattern. The culture medium was replaced every three days. The experiment was conducted in a naturally lit greenhouse, and the plants were harvested after four weeks of treatment.

[0109] like Figure 5 As shown by Figure 5 Compared to the commonly used floating bed plant, Acorus calamus, Artemisia sempervirens has a higher phosphorus content, reaching a maximum of 13.37 mg / g, exceeding the industry-recognized standard for phosphorus-accumulating plants (10 mg / g). Furthermore, Artemisia sempervirens has a significant advantage in phosphorus accumulation in high-phosphorus environments (42.63% higher than Acorus calamus), which may be related to its superior phosphorus tolerance and phosphorus-accumulating properties.

[0110] Example 2 Preparation of Matrix

[0111] Thoroughly mix the following parts by weight: sawdust (4%), polyferric sulfate (8%), magnesium sulfate (8%), lanthanum oxide (0.4%), bentonite (8%), diatomaceous earth (7%), and zeolite powder (8%). Add inorganic cementitious materials: Portland cement (20%), citric acid (0.04%), and boric acid (0.03%), and stir.

[0112] After being uniform, add clear water, continue to stir, slowly add water, until forming a colloidal state of micro-flow, now the weight ratio of the above-mentioned solid raw material to water is 1: 0.3. The colloidal substance is filled into a mold, and after standing for 12 hours, demoulding and taking out the dephosphorization block. The gained phosphorus block is cured for 5 days under standard conditions to improve strength and obtain a dephosphorization ecological floating bed matrix. The dephosphorization ecological floating bed in the following examples is prepared according to this method.

[0113] Example 3: Filled phosphorus removal ecological floating bed

[0114] The phosphorus removal ecological floating bed of this embodiment is composed of 90 Figure 3 The floating window modules shown (a single floating bed module has a size of 0.33m*0.33m) are assembled and specifically include:

[0115] Floating plate base: Made of high-density polyethylene (HEPE) material; overall size is 4.95m x 1.98m, a total of 10m 2 , i.e. 0.33m*3*5 in length and 0.33m*3*2 in width; the placement density of the holes is 9 holes / m 2 ;

[0116] Plant pot: The bottom is provided with a storage hole, and the top edge is fixed above the storage hole; the dimensions are: diameter 16cm, bottom diameter 12cm, height 14cm;

[0117] Substrate, the placement area is located in the plant pot; the dosage is 1.5 kg / pot;

[0118] The roots of Artemisia annua are planted in plant pots; the planting quantity is 4 plants / pot.

[0119] Example 4 Suspended phosphorus removal ecological floating bed

[0120] The phosphorus removal ecological floating bed of this embodiment is composed of 90 Figure 2 The floating window module shown is assembled and formed, specifically including:

[0121] Floating plate base: the material and overall dimensions are the same as those in Example 3;

[0122] Plant pot: The arrangement and size are the same as those in Example 3, except that the pot is filled with gravel;

[0123] The substrate is processed into a spherical shape and placed in a mesh bag, which is suspended on the four sides of the floating plate base. The diameter of the substrate in each mesh bag is designed to be graded, specifically including: small-sized substrate balls of 1-2 cm, medium-sized substrate balls of 2-3 cm, and large-sized substrate balls of 4-5 cm. The total amount used is the same as in Example 3, that is, the total amount of substrate in the mesh bag around each plant pot is 1.5 kg.

[0124] The planting method and planting amount of Artemisia seu Dorado are the same as those in Example 3.

[0125] Comparative Example 1

[0126] The only difference from Example 3 is that Artemisia seu Fructus is replaced by Acorus calamus, and the planting amount of Acorus calamus is 4 plants / pot.

[0127] Comparative Example 2

[0128] The only difference from Example 4 is that Artemisia seu Fructus is replaced by Acorus calamus, and the planting amount of Acorus calamus is 4 plants / pot.

[0129] Example 5

[0130] The only difference from Example 3 is that 40 pots of Artemisia seu Fructus were replaced by Acorus calamus, and the planting amount of Acorus calamus was 4 plants / pot.

[0131] Example 6

[0132] The only difference from Example 4 is that 40 pots of Artemisia seu Fructus were replaced with Acorus calamus, and the planting amount of Acorus calamus was 4 plants / pot.

[0133] Comparative study on the decontamination performance of floating bed systems with different phosphorus hyperaccumulators

[0134] Test objects: phosphorus removal ecological floating beds of Examples 3 and 4, and Comparative Examples 1 and 2;

[0135] Test waters: Xiaonan Lake in the North Garden of the National Botanical Garden, about 600m 2

[0136] Trial duration: 63 days

[0137] Test results: See Figure 6 and Table 1:

[0138] Table 1 Phosphorus extraction amount of different phosphorus removal ecological floating beds

[0139]

[0140] Experimental conclusion: In terms of phosphorus extraction, the Artemisia annua + substrate system is 6.16% better than the Acorus calamus + substrate system.

[0141] Comparative study on the decontamination performance of floating bed systems with different substrate arrangements (filled / suspended)

[0142] Test object: phosphorus removal ecological floating bed of Examples 5 and 6;

[0143] Test waters: Xiaonan Lake in the North Garden of the National Botanical Garden, about 600m 2 ; See Figure 7 , Figure 7 The floating bed on the left side of the center is Example 5 (i.e., a filled floating bed), and the floating bed on the right side is Example 6 (i.e., a suspended floating bed). Five sampling points were set: water inlet 1 in the upstream area, water outlet 5 in the downstream area, sampling point 3 between the upstream and downstream areas, sampling point 2 near the filled floating bed, and sampling point 4 near the suspended floating bed. Sampling point 3 is parallel to sampling points 2 and 4.

[0144] Trial duration: 63 days

[0145] Test results: See Table 2

[0146] Table 2 Sampling results at different sampling points

[0147]

[0148] Table 2 Sampling results at different sampling points

[0149]

[0150] Test conclusion:

[0151] 1. The matrix can achieve phosphorus enrichment, strengthen the phosphorus uptake capacity of the rhizosphere micro-domain, and have a good algae control effect, as follows:

[0152] 2. When the floating bed coverage rate is 3%, the total phosphorus removal rate can reach 8.5%-15.5%.

[0153] 3. When the floating bed coverage rate was 3%, the chlorophyll a content decreased by 46.38%-79.26%;

[0154] 4. The phosphorus concentration in the rhizosphere micro-domain of the filled floating island plants is 23.21%-53.91% higher than that of the suspended floating island plants.

[0155] While various embodiments of the present invention have been described above, the above descriptions are intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A phosphorus removal ecological floating bed, characterized in that: The matrix is ​​a sulphoaluminate cement-based material loaded with Fe, and the phosphorus hyperaccumulator plant is Artemisia serrata.

2. The phosphorus removal ecological floating bed according to claim 1, characterized in that: Specifically include: A floating plate base is provided with a storage hole; The plant pot has a bottom through which a storage hole is formed, and a top edge is clamped above the storage hole; The substrate is arranged in the plant pot and / or is hung around the plant pot; May mugwort, the roots of which are planted in the plant pot.

3. The phosphorus removal ecological floating bed according to claim 1, characterized in that: There are multiple storage holes, which are evenly arranged on the floating plate base, with a density of 6-12 holes / m 2 , and / or, the plant pot has an upper diameter of 14-18 cm, a lower diameter of 10-15 cm, and a height of 10-18 cm.

4. The phosphorus removal ecological floating bed according to claim 3, characterized in that: The planting amount of each plant pot is 2-6 plants / pot.

5. The phosphorus removal ecological floating bed according to claim 5, characterized in that: The amount of the substrate used is 1-4 kg / pot.

6. The phosphorus removal ecological floating bed according to claim 1, characterized in that: The matrix is ​​hung around the plant pot specifically as follows: The phosphorus removal ecological floating bed also includes a hanging net bag, the top of which is fixed by a floating plate base and the bottom is a free hanging end; The matrix is ​​in block or ball shape and is installed in the mesh bag.

7. The phosphorus removal ecological floating bed according to claim 1, characterized in that: Each hanging mesh bag is provided with substrates of three sizes, namely: a small substrate of 1-2 cm in size, a medium substrate of 2-3 cm in size, and a large substrate of 4-5 cm in size; the size is the maximum side length or diameter.

8. The phosphorus removal ecological floating bed according to claim 1, characterized in that: The floating board substrate is a foam board, a plastic frame, or is made of a PVC pipe.

9. Use of the phosphorus removal ecological floating bed according to any one of claims 1 to 8 in water ecological restoration.

10. The use according to claim 9, characterized in that The coverage rate of the phosphorus removal ecological floating bed is 2-5%.

Images