CN114906920A - Biological retention facility filler, preparation method and application thereof, and biological retention facility - Google Patents

Biological retention facility filler, preparation method and application thereof, and biological retention facility Download PDF

Info

Publication number
CN114906920A
CN114906920A CN202210358587.8A CN202210358587A CN114906920A CN 114906920 A CN114906920 A CN 114906920A CN 202210358587 A CN202210358587 A CN 202210358587A CN 114906920 A CN114906920 A CN 114906920A
Authority
CN
China
Prior art keywords
bioretention
facility
zeolite
layer
modified zeolite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210358587.8A
Other languages
Chinese (zh)
Other versions
CN114906920B (en
Inventor
杨飞
秦弋丰
梁安泽
吴昊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Geographic Sciences and Natural Resources of CAS
Original Assignee
Institute of Geographic Sciences and Natural Resources of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Geographic Sciences and Natural Resources of CAS filed Critical Institute of Geographic Sciences and Natural Resources of CAS
Priority to CN202210358587.8A priority Critical patent/CN114906920B/en
Publication of CN114906920A publication Critical patent/CN114906920A/en
Application granted granted Critical
Publication of CN114906920B publication Critical patent/CN114906920B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001—Runoff or storm water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/15—N03-N
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention discloses a biological retention facility filler, a preparation method, application and a biological retention facility, wherein the biological retention facility filler comprises modified zeolite and peat soil, the modified zeolite is prepared by modifying natural zeolite with a cationic surfactant, and the addition amount of the cationic surfactant is 10-30% of the exchangeable cation capacity of the natural zeolite; the bioretention facility packing is used in a bioretention facility as a substrate layer of the bioretention facility. According to the invention, the modified zeolite is modified by loading the cationic surfactant on the surface of the natural zeolite, so that the adsorption performance of the natural zeolite on anions can be improved, and the internal cavity of the modified zeolite still keeps the cation exchange capacity, thereby strengthening the anion pollutants such as phosphorus, nitrate nitrogen and the like, and simultaneously keeping the original capacity of removing ammonia nitrogen and other cation pollutants.

Description

Biological retention facility filler, preparation method and application thereof, and biological retention facility
Technical Field
The invention relates to the technical field of ecological environment treatment, in particular to a biological retention facility filler, a preparation method, application and a biological retention facility.
Background
At present, with the rapid urbanization development process, the properties and morphological characteristics of the urban underground cushion surface are changed, and the number of impermeable areas in urban areas is increased, so that the urban rainfall runoff is rapidly increased, and the rainfall runoff pollution is also aggravated. The bioretention facility is widely applied to the fields of urban rainfall flood management, sponge city construction and urban ecological construction at home and abroad, the functional main body of the bioretention facility is matrix filler, and the bioretention facility has the main functions of reducing the peak flow of urban rainfall runoff, purifying the rainwater and realizing multiple targets of runoff total amount, runoff peak value, runoff pollution control and the like.
However, the main filler of the current mainstream bioretention facility is mainly a composite matrix material prepared by mixing soil and fillers such as zeolite, vermiculite, perlite and the like, the composite matrix materials with different proportions have good runoff reducing effect and runoff ammonia nitrogen removing effect, but the removal effect of nitrate nitrogen and phosphorus in runoff is poor, and as a plurality of soil matrixes are rich in phosphorus, the leaching loss problem of phosphorus can be generated in rainfall runoff to pollute urban water bodies and urban surrounding water bodies.
Disclosure of Invention
The invention provides a biological retention facility filler, a preparation method, an application and a biological retention facility, which at least solve the technical problems in the prior art.
In one aspect, the present invention provides a bioretention facility packing comprising:
the modified zeolite is prepared by modifying natural zeolite with a cationic surfactant, and the addition amount of the cationic surfactant is 10-30% of the exchangeable cation capacity of the natural zeolite.
In one possible embodiment, the natural zeolite is clinoptilolite or mordenite.
In one embodiment, the cationic surfactant is cetyltrimethylammonium bromide.
In another aspect, the present invention provides a method for preparing a packing for bioretention facilities, the method comprising:
preparing modified zeolite: cleaning natural zeolite, then putting the natural zeolite and a cationic surfactant into a stirring device, adding deionized water according to a solid-to-liquid ratio of 1:8-12, stirring for 5-20h at 30-50 ℃, cooling to room temperature, cleaning for multiple times, and drying to obtain modified zeolite;
and mixing the modified zeolite and the peat soil according to the addition proportion to obtain the bioretention facility filler.
In one embodiment, the addition ratio of the modified zeolite is determined according to the rainfall characteristics of the use area.
In one embodiment, the determining the adding proportion of the modified zeolite according to the rainfall characteristics of the use area comprises:
acquiring rainfall intensity of a use area of the bioretention facility and the area of the bioretention facility;
determining the inflow rate according to the rainfall intensity and the area of the bioretention facility, wherein the inflow rate is the inflow rate of the bioretention facility under the rainfall intensity condition;
and determining the adding proportion of the modified zeolite according to a target removal rate and the inflow rate, wherein the target removal rate is the reduction rate of target pollutants.
In a further aspect the present invention provides the use of a bioretention facility packing prepared according to the above method in a bioretention facility.
In yet another aspect, the invention provides a bioretention installation comprising:
a substrate layer, said substrate layer being the bioretention facility packing prepared by the method of any one of claims 4-6, said substrate layer having a thickness of 500-700 mm;
the covering layer is arranged above the substrate layer, and the thickness of the covering layer is 30-50 mm;
a permeable geotextile under the matrix layer;
a filter layer located below the permeable geotextile; and
the drainage layer, the drainage layer is for tiling the water pipe that punches of filter layer below.
In one embodiment, the cover layer is formed by laying an organic cover for greening.
In one embodiment, the filter layer is composed of gravel having a particle size of 30-50mm, and the thickness of the filter layer is 100-200 mm.
In the scheme of the invention, the modified zeolite is obtained by modifying the natural zeolite by loading the cationic surfactant on the surface of the natural zeolite, so that the adsorption performance of the natural zeolite on anions can be improved, and the internal cavity of the modified zeolite still keeps the cation exchange capacity, thereby strengthening the anion pollutants such as phosphorus, nitrate nitrogen and the like, and simultaneously keeping the original capacity of removing ammonia nitrogen and other cation pollutants. The modified zeolite and the peat soil are mixed and then used as the bioretention facility filler, and nitrogen and phosphorus pollutants in rainfall runoff can be effectively removed, so that the threat of the rainfall runoff pollution to urban water ecology is effectively relieved. The biological retention facility containing the biological retention facility filler is further applied to the underground of the city, belongs to a natural drainage system, is an ecological drainage facility, and can restore the ecological function of the city to a certain extent. The bioretention facility can fully play the functions of absorbing, storing and permeating rainwater and slow releasing for urban greenbelts, roads, water systems and the like, and has important significance for improving urban water ecological environment and guaranteeing urban water environmental safety.
Drawings
FIG. 1 shows a schematic structural view of a bioretention facility according to one embodiment of the present invention;
FIG. 2 shows nitrogen and phosphorus removal effects of natural zeolite and modified zeolite;
figure 3 shows the adsorption capacity curve of the modified zeolite at 25 ℃.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The embodiment of the invention provides a biological retention facility filler, which comprises:
the modified zeolite is prepared by modifying natural zeolite with a cationic surfactant, and the addition amount of the cationic surfactant is 10-30% of the exchangeable cation capacity of the natural zeolite.
Since natural zeolites are porous hydrous aluminosilicate crystals having a lattice structure, a large specific surface area and unique adsorption and ion exchange capabilities, zeolites have a large number of broad channels and cavities. The compensating cations present inside the zeolite, mainly the alkali metal ions and alkaline earth metal ions, are weakly associated with the zeolite, have a greater mobility, are easily exchanged with other cations, and do not destroy the zeolite structure. The electronegativity of the aluminotetrahedral structure of natural zeolite makes it possible to counter the ammonium groups in solution by physical adsorption and ion exchange (NH 4) + ) Isocationic contaminants adsorb, but phosphate in water (PO 4) 3- ) Nitrate radical (NO) 3 - ) The removal ability of plasma contaminants is poor.
The modified zeolite is obtained by modifying the natural zeolite by loading the cationic surfactant on the surface of the natural zeolite, so that the adsorption performance of the natural zeolite to anions can be improved, and the internal cavity of the modified zeolite still keeps the cation exchange capacity, thereby strengthening the anionic pollutants such as phosphorus, nitrate nitrogen and the like, and simultaneously keeping the original capacity of the natural zeolite for removing ammonia nitrogen and other cationic pollutants.
The addition amount of the cationic surfactant is 10-30% of the exchangeable cation capacity of the natural zeolite, and is calculated according to the following formula (1):
Figure BDA0003582902430000041
wherein, f is the ratio of the exchangeable cation capacity of the cationic surfactant and the natural zeolite, namely 10-30%; m1 is the mass of the cationic surfactant in g; CEC is exchangeable cation capacity in mol/g; m2 is the mass of natural zeolite, in g; GMW is the molecular weight of the cationic surfactant; z is the charge carried by the cation of the cationic surfactant.
The natural zeolite is clinoptilolite or mordenite; the cationic surfactant is cetyl trimethyl ammonium bromide.
A method of making a bioretention facility packing, the method comprising:
preparing modified zeolite: cleaning natural zeolite, then putting the natural zeolite and a cationic surfactant into a stirring device, adding deionized water according to a solid-to-liquid ratio of 1:8-12, stirring for 5-20h at 30-50 ℃, cooling to room temperature, cleaning for multiple times, and drying to obtain modified zeolite;
and mixing the modified zeolite and the peat soil according to the addition proportion to obtain the bioretention facility filler.
In one example, determining the addition ratio of the modified zeolite comprises:
the adding proportion of the modified zeolite is determined according to the rainfall characteristics of the using area.
The area of use is the area where the bioretention facility is applied, for example where the bioretention facility is applied in an area, the rainfall characteristics are the rainfall characteristics of that area, the rainfall characteristics being indicative of the intensity of rainfall in that area.
In one example, the proportion of the modified zeolite added is determined according to rainfall characteristics of a use area, and comprises the following steps:
acquiring rainfall intensity of a use area of a bioretention facility and the area of the bioretention facility;
determining the inflow rate according to the rainfall intensity and the area of the bioretention facility, wherein the inflow rate is the inflow rate of the bioretention facility under the rainfall intensity condition;
and determining the adding proportion of the modified zeolite according to a target removal rate and the inflow rate, wherein the target removal rate is the reduction rate of target pollutants.
Specifically, the inflow rate is determined according to the rainfall intensity and the area of the bioretention facility, and is calculated according to the following formula (2):
q ═ CIA/360 equation (2)
Wherein Q is the inflow rate, and the unit is ml/min; c is a surface coefficient equal to 1; i is rainfall intensity, and the unit is mm/h; a is the area of the biological detention facility, and the unit is hectare; after the rainfall intensity I and the area A of the bioretention facility are determined, the inflow Q of the bioretention facility under the rainfall condition of the area can be determined according to the formula (2) for calculation.
Specifically, the adding proportion of the modified zeolite is determined according to the target removal rate and the inflow rate, and is calculated according to the following models (3) to (5):
C(NO)＝0.4Q+0.59Z1-0.022Q 2 +52.66(R 2 0.88 ═ formula (3)
C(NH)＝0.69Q+0.92Z2-0.015Q 2 (R 2 0.83) formula (4)
C(TP)＝0.25Z3-0.5Q+12.25(R 2 0.83) formula (5)
Wherein, C (NO), C (NH), C (TP) respectively represent the reduction rate (%) of nitrate nitrogen, ammonia nitrogen and total phosphorus, namely the target removal rate; z represents the adding proportion (volume ratio,%) of the modified zeolite; q represents the inflow (ml/min) of the bioretention facility corresponding to rainfall conditions; r 2 Representing the goodness of fit of the model.
Assuming that the target removal rate of nitrate nitrogen is 95%, after determining the inflow Q of the bioretention facility, the addition ratio Z1 of the modified zeolite can be determined according to the formula (3). Similarly, according to the formulas (4) and (5), the addition ratios Z2 and Z3 of the modified zeolite can be calculated on the premise of determining the target removal rates of ammoniacal nitrogen and total phosphorus. Finally, the addition ratio Z of the modified zeolite is the maximum value among Z1, Z2, and Z3, and the average value of Z1, Z2, and Z3 may be determined as the addition ratio of the modified zeolite.
An embodiment of the present invention further provides a bioretention facility, including:
the matrix layer is the biological retention facility filler prepared by the method, and the thickness of the matrix layer is 500-700 mm;
the covering layer is arranged above the substrate layer, and the thickness of the covering layer is 30-50 mm;
a permeable geotextile beneath the matrix layer;
a filter layer located below the permeable geotextile; and
the drainage layer, the drainage layer is for tiling the water pipe that punches of filter layer below.
In one example, the cover layer is formed by laying an organic cover for greening.
In one example, the filter layer is comprised of gravel having a particle size of 30-50mm and the filter layer has a thickness of 100-200 mm.
Fig. 1 is a schematic structural view showing an application of a bioretention facility, which comprises a cover layer 11, a substrate layer 12, a permeable geotextile 13, a filter layer 14 and a drainage layer 15 in sequence from top to bottom. The covering layer 11 is formed by laying an organic covering material for greening, the covering layer 11 has good heat preservation, water retention and water absorption effects, the material loss caused by rainwater runoff scouring of the matrix layer 12 can be avoided, and a better growing environment can be provided for plants.
The present invention will be described in detail with reference to specific examples.
In the examples, the natural zeolite is clinoptilolite produced in Jinyun county of Lishui, Zhejiang province and having CEC value of 1.6475 × 10 -3 mol/g。
Example 1
A bioretention facility filler comprises peat soil and modified zeolite, wherein the modified zeolite is prepared by modifying clinoptilolite with hexadecyl trimethyl ammonium bromide, and the addition amount of the hexadecyl trimethyl ammonium bromide is 10% of the CEC value of the clinoptilolite; the volume ratio of the peat soil to the modified zeolite is 7: 3.
The preparation method of the bioretention facility filler comprises the following steps:
step S11, washing clinoptilolite with deionized water for several times until clear liquid is obtained, then putting the washed clinoptilolite and a corresponding amount of hexadecyl trimethyl ammonium bromide into a stirring device with a stirring and heating device, adding deionized water according to a solid-to-liquid ratio of 1:10, stirring for 12 hours at a constant temperature of 40 ℃, cooling to room temperature, filtering liquid, washing the obtained filter cake with deionized water for several times, washing until no precipitate is formed after silver nitrate is added to a supernatant sample, and drying for 12 hours in a 105 ℃ oven to obtain modified zeolite;
and S12, uniformly mixing the peat soil and the modified zeolite according to the volume ratio of 7:3 to obtain the bioretention facility filler.
The modified zeolite was subjected to the following performance tests
Firstly, the nitrogen and phosphorus removal effect of the modified zeolite is as follows: 5mg/L NH for preparing simulated sewage 4 + -N, 5mg/L NO 3 - And (4) mixing the-N and 1mg/LTP to form a mixed solution, and testing the natural zeolite and the modified zeolite to verify the nitrogen and phosphorus removal effect. The mixed solution was divided into 2 parts on average, and natural zeolite and modified zeolite were added to 2 parts of the mixed solution in an amount of 15g/L, respectively, and after a while, the concentrations of each ion in the mixed solution were measured again.
The verification result is shown in figure 2, natural zeolite is used for NH 4 + the-N has better removal effect, the removal rate can reach 76.3 percent, but the NO is not removed 3 - N and TP had little effect and the removal rates were only 1.4% and 1%. Modified zeolite pair NH 4 + The removal rate of-N is slightly improved to 79.6 percent, because the cationic surfactant is only attached to the surface of the zeolite and cannot enter the internal cavity channel of the zeolite due to larger group volume, the adsorption capacity of the zeolite to cations is reserved, and impurities in the internal cavity channel of the natural zeolite can be washed out by continuous vibration, heating and washing in the modification process, so that the adsorption capacity of the cationic surfactant to the cations is enhancedForce. The cationic surfactant modified natural zeolite obviously improves NO of the modified zeolite 3 - Ability to remove anionic contaminants such as N and TP, modified zeolites to NO 3 - The removal rates of-N and TP respectively reach 86.7 percent and 73.2 percent, and compared with the natural zeolite, the nitrogen and phosphorus removal capability of the modified zeolite is greatly improved.
Second, modified zeolite adsorption capacity test
As shown in FIG. 3, the adsorption capacity curve of the modified zeolite at 25 ℃ shows that the adsorption of the modified zeolite to pollutants has higher fitting degree (R) with Langmuir adsorption isothermal model 2 Greater than 0.97) is a class I adsorption isotherm, and the adsorption type is single-layer reversible adsorption.
Table 1 is the theoretical maximum adsorption capacity of the modified zeolite for different contaminants calculated according to the Langmuir adsorption isotherm model.
TABLE maximum theoretical adsorption Capacity of modified zeolites for different contaminants at 125 deg.C
Figure BDA0003582902430000081
Example 2
A bioretention section facility comprising:
a substrate layer, wherein the substrate layer is the biological retention facility filler prepared in the example 1, and the thickness of the substrate layer is 600 mm;
the covering layer is arranged above the substrate layer, and the thickness of the covering layer is 30-50 mm;
a permeable geotextile beneath the matrix layer;
the filtering layer is positioned below the permeable geotextile, gravels with the particle size of 30-50mm are filled in the filtering layer, and the thickness of the filtering layer is 200 mm; and
the drainage layer, the drainage layer is for tiling the water pipe that punches of filter layer below.
The simulation test in this example uses peristaltic pumps and soil columns to test the denitrification and dephosphorization effect of the bioretention facility packing. Wherein the diameter of the earth pillar is 20cm, the height thereof is 900cm, the filler layer in the earth pillar is 600mm, and the filter layer is 200 mm. The filler layer is filled with a bioretention facility filler prepared by mixing peat soil and modified zeolite according to the ratio of 7:3, and the filter layer is filled with gravels with the particle size of 30-50 mm. In order to compare whether the modified zeolite obviously improves the nitrogen and phosphorus removal capability of the filler, the same soil columns are used for testing the nitrogen and phosphorus removal capability of the filler prepared by the natural zeolite and the peat soil in the same proportion. The test adopts a rainfall simulation runoff production method of the soil column, namely, a peristaltic pump is used for supplying water to the soil column, simulated urban rainfall runoff is adopted for supplying water, and the nitrogen and phosphorus removal effect of the bioretention facility filler is tested under the conditions of different rainfall recurrence periods by taking 1-hour rainfall as an example. The simulated runoff pollutant concentrations and the corresponding inflow flow rates in different rainfall recurrence periods are shown in the following table 2:
table 2 simulation runoff pollutant concentration and inflow corresponding to different rainfall
Figure BDA0003582902430000091
Table 3 shows the NH pairs of bioretention facility fillers formulated with peat soil and modified and natural zeolites at different rainfall recurrence periods 4 + -N、NO 3 - -removal of N and TP.
TABLE 3 removal of different pollutants by different fillers under different rainfall recurrence period conditions
Figure BDA0003582902430000092
Figure BDA0003582902430000101
From table 3, it can be seen that the conventional bioretention facility filler added with natural zeolite has a low removal rate for anionic pollutants, especially the problem that TP also generates phosphorus leaching loss in rainfall runoff, and the bioretention facility filler prepared by adding modified zeolite provided by the invention can greatly improve the removal capacity of the bioretention facility for anionic pollutants such as nitrate nitrogen and phosphorus in different rainfall recurrence periods, and can maintain the original higher ammonia nitrogen removal rate. Under the most common rainfall condition of 1 year recurrence period, the removal rates of ammonia nitrogen and nitric nitrogen are both over 60 percent, the total phosphorus removal rate can also reach 25.3 percent, and the water purification performance is better. In addition, the total phosphorus and total nitrogen adsorption capacity of the bioretention facility filler prepared by mixing peat soil and modified zeolite according to the ratio of 7:3 is measured by experiments, the adsorption capacity of the filler on the total phosphorus is 0.286mg/g, the adsorption capacity on the total nitrogen is 0.235mg/g, and 462 years for the total phosphorus adsorption saturation and 28 years for the total nitrogen adsorption saturation are calculated according to the adsorption capacity. Thus, the theoretical maximum age of filler when the peat soil is mixed with the modified zeolite at a ratio of 7:3 is 28 years.
The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.
The words such as "including," "comprising," "having," and the like, referred to in this application are open-ended words that mean "including, but not limited to," and are used interchangeably herein. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It is further noted that in the method of the present application, the steps may be decomposed and/or recombined, and these decomposition and/or recombination should be regarded as an equivalent solution of the present application.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

Claims (10)

1. A bioretention facility packing, comprising: the modified zeolite is prepared by modifying natural zeolite with a cationic surfactant, and the addition amount of the cationic surfactant is 10-30% of the exchangeable cation capacity of the natural zeolite.
2. The bioretention facility packing according to claim 1 wherein the natural zeolite is clinoptilolite or mordenite.
3. The bioretention facility packing according to claim 1 wherein the cationic surfactant is cetyltrimethylammonium bromide.
4. A method of making a bioretention facility packing according to any one of claims 1-3 including:
preparing modified zeolite: cleaning natural zeolite, then putting the natural zeolite and a cationic surfactant into a stirring device, adding deionized water according to a solid-to-liquid ratio of 1:8-12, stirring for 5-20h at 30-50 ℃, cooling to room temperature, cleaning for multiple times, and drying to obtain modified zeolite;
and mixing the modified zeolite and the peat soil according to the addition proportion to obtain the bioretention facility filler.
5. The method of producing a bioretention facility packing according to claim 4 wherein the proportion of the modified zeolite added is determined according to the rainfall characteristics of the area of use.
6. The method for preparing bioretention facility packing according to claim 5 wherein the determining the proportion of modified zeolite added according to the rainfall characteristics of the area of use includes:
acquiring rainfall intensity of a use area of a bioretention facility and the area of the bioretention facility;
determining the inflow rate according to the rainfall intensity and the area of the bioretention facilities, wherein the inflow rate is the inflow rate of the bioretention facilities under the rainfall intensity condition;
and determining the adding proportion of the modified zeolite according to a target removal rate and the inflow rate, wherein the target removal rate is the reduction rate of target pollutants.
7. Use of a bioretention facility packing prepared according to the process of any one of claims 4-6 in a bioretention facility.
8. A bioretention facility comprising:
a substrate layer, said substrate layer being the bioretention facility packing prepared by the method of any one of claims 4-6, said substrate layer having a thickness of 500-700 mm;
the covering layer is arranged above the substrate layer, and the thickness of the covering layer is 30-50 mm;
a permeable geotextile under the matrix layer;
a filter layer located below the permeable geotextile; and
the drainage layer, the drainage layer is for tiling the water pipe that punches of filter layer below.
9. Bioretention installation according to claim 8 wherein the cover layer is laid out of an organic cover for greening.
10. A bioretention facility according to claim 8 wherein the filtration layer is composed of gravel having a particle size of 30-50mm and the thickness of the filtration layer is 100-200 mm.
CN202210358587.8A 2022-04-06 2022-04-06 Biological retention facility filler, preparation method and application thereof, and biological retention facility Active CN114906920B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210358587.8A CN114906920B (en) 2022-04-06 2022-04-06 Biological retention facility filler, preparation method and application thereof, and biological retention facility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210358587.8A CN114906920B (en) 2022-04-06 2022-04-06 Biological retention facility filler, preparation method and application thereof, and biological retention facility

Publications (2)

Publication Number Publication Date
CN114906920A true CN114906920A (en) 2022-08-16
CN114906920B CN114906920B (en) 2023-03-31

Family

ID=82762491

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210358587.8A Active CN114906920B (en) 2022-04-06 2022-04-06 Biological retention facility filler, preparation method and application thereof, and biological retention facility

Country Status (1)

Country Link
CN (1) CN114906920B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117534199A (en) * 2024-01-09 2024-02-09 西华大学 Biological retention filler, preparation method thereof and biological retention facility

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100059437A1 (en) * 2008-09-11 2010-03-11 University Of Central Florida Research Foundation, Inc. Passive Underground Drainfield For Septic Tank Nutrient Removal Using Functionalized Green Filtration Media
CN103539217A (en) * 2013-11-06 2014-01-29 四川大学 Zeolite modification method for synchronously removing cationic and anionic nitrogen and anionic phosphorus pollutants from sewage
CN107100261A (en) * 2017-05-19 2017-08-29 广西益江环保科技股份有限公司 A kind of novel rainwater is detained filtration system
CN110424510A (en) * 2019-07-30 2019-11-08 上海交通大学 One kind is every salt form Rain Garden structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100059437A1 (en) * 2008-09-11 2010-03-11 University Of Central Florida Research Foundation, Inc. Passive Underground Drainfield For Septic Tank Nutrient Removal Using Functionalized Green Filtration Media
CN103539217A (en) * 2013-11-06 2014-01-29 四川大学 Zeolite modification method for synchronously removing cationic and anionic nitrogen and anionic phosphorus pollutants from sewage
CN107100261A (en) * 2017-05-19 2017-08-29 广西益江环保科技股份有限公司 A kind of novel rainwater is detained filtration system
CN110424510A (en) * 2019-07-30 2019-11-08 上海交通大学 One kind is every salt form Rain Garden structure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
张晖等: "HDTMA-沸石的制法及其去除水中磷酸盐的研究", 《广州化学》 *
谢强等: "一种能同时吸附水中多种污染物的新型吸附材料:表面活性剂改性沸石", 《中国科学:技术科学》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117534199A (en) * 2024-01-09 2024-02-09 西华大学 Biological retention filler, preparation method thereof and biological retention facility
CN117534199B (en) * 2024-01-09 2024-03-26 西华大学 Biological retention filler, preparation method thereof and biological retention facility

Also Published As

Publication number Publication date
CN114906920B (en) 2023-03-31

Similar Documents

Publication Publication Date Title
Bruch et al. Improving the treatment efficiency of constructed wetlands with zeolite-containing filter sands
Wu et al. Evaluation of the adsorption of ammonium-nitrogen and phosphate on a granular composite adsorbent derived from zeolite
CN114906920B (en) Biological retention facility filler, preparation method and application thereof, and biological retention facility
Shao et al. Phosphorus and nitrogen recovery from wastewater by ceramsite: Adsorption mechanism, plant cultivation and sustainability analysis
CN105617981A (en) Sepiolite modification method and application of modified sepiolite to wastewater treatment
CN104229999B (en) A kind of filler for artificial swamp water treatment and preparation method thereof
Bar-Yosef et al. Inorganic contaminants in the vadose zone
CN102600796B (en) Denitrification filter material for absorbing ammonia and nitrogen and regenerating method thereof
CN112844309B (en) Multi-effect biochar-based composite material and preparation method and application thereof
CN100415360C (en) Production of sewage dephosphor adsorbent by adsorptive ion rare earth
CN102614826B (en) Modified expanded perlite for treating low-concentration ammonia-nitrogen wastewater and wastewater treatment method
KR20090083732A (en) Zeolite coating method on surface of material and its products
CN116253439A (en) Construction method of iron-calcium layered double-metal hydroxide type constructed wetland
Clark et al. Filtered metals control in stormwater using engineered media
CN109433159B (en) Cobalt coordination polymer iodine vapor load material and preparation method and application thereof
Chen et al. Effects of Diatomite on the Physiological and Purification Performance of Diatomite-Zeolite Vegetation Concrete
Lin et al. A novel structure applied to the permeable brick paving system and its decontamination performance.
CN116586033A (en) Zeolite modification method suitable for rapid denitrification of initial rainwater
Chen Adsorption and diffusion of ammonium in soils
CN109400897B (en) 2D cadmium coordination polymer iodine vapor load material and preparation method and application thereof
CN111204871A (en) Ecological floating island material capable of adsorbing phosphorus and preparation process thereof
Ming Applications for special-purpose minerals at a lunar base
CN114891167B (en) Binary ionic liquid covalent bonding immobilized silicon-based material and preparation and application thereof
CN114907058B (en) Water purification component for reducing total phosphorus and preparation method and application thereof
CN112892468A (en) Modified sandstone and preparation and application methods thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant