CN111908713A - Modularized in-situ river channel ecological management recovery system - Google Patents
Modularized in-situ river channel ecological management recovery system Download PDFInfo
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- CN111908713A CN111908713A CN202010683003.5A CN202010683003A CN111908713A CN 111908713 A CN111908713 A CN 111908713A CN 202010683003 A CN202010683003 A CN 202010683003A CN 111908713 A CN111908713 A CN 111908713A
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 26
- 238000011084 recovery Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000007667 floating Methods 0.000 claims abstract description 31
- 230000001699 photocatalysis Effects 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 238000005273 aeration Methods 0.000 claims abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 4
- 230000000813 microbial effect Effects 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 48
- 229910021389 graphene Inorganic materials 0.000 claims description 42
- 229960000892 attapulgite Drugs 0.000 claims description 39
- 229910052625 palygorskite Inorganic materials 0.000 claims description 39
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 34
- -1 graphene modified nano silver Chemical class 0.000 claims description 28
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 24
- 239000011941 photocatalyst Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 21
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical class [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000005067 remediation Methods 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The invention relates to the field of river water in-situ treatment, and provides a modular in-situ river channel ecological treatment recovery system for solving the problem of poor river water quality. The invention provides a modular in-situ river channel ecological management and recovery system, which comprises: the artificial floating island is arranged in the center of the river channel; the ecological filter tank is provided with a river channel point source pollution confluence port; the protective curtain is arranged at the upstream of the river channel for treatment or at the downstream of the branch confluence; a photocatalytic film disposed in a river segment; a microbial device disposed within a river; an aeration device disposed upstream of the artificial floating island or photocatalytic membrane. Obviously improves the environmental quality of the river water and reduces the content of pollutants in the river water.
Description
Technical Field
The invention relates to the field of river water in-situ treatment, in particular to a modular in-situ river channel ecological treatment recovery system.
Background
The urban riverway in China generally has the problems of lack of clean water source supply, poor riverway fluidity, damage to the ecological systems of the riverway and the riverside zone and the like, the self-cleaning capability is seriously reduced, and in addition, the water quality of rivers is seriously deteriorated because various pollution sources are difficult to control in a short time. The traditional river channel treatment usually adopts municipal engineering means such as dredging and water changing, and the like, and may have certain effect in a short period, but the treatment is temporary and permanent, and the problem of the polluted urban river channel is difficult to be radically treated because the self-purification capacity of the river channel is not recovered.
Disclosure of Invention
The invention solves the technical problem of poor river water quality and provides a modular in-situ river channel ecological management recovery system.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a modular in-situ river ecological remediation recovery system, comprising:
the artificial floating island is arranged in the center of the river channel;
the ecological filter tank is provided with a river channel point source pollution confluence port;
the protective curtain is arranged at the upstream of the river channel for treatment or at the downstream of the branch confluence;
a photocatalytic film disposed in a river segment;
a microbial device disposed within a river;
an aeration device disposed upstream of the artificial floating island or photocatalytic membrane.
The river channel is treated in situ by combining artificial floating island, ecological filter, protective curtain, photocatalysis, microorganism and aeration technologies in various modes.
Effectively carries out ecological management on river water and improves the water quality.
Preferably, the artificial floating island comprises:
a floating island body;
the floating body is connected with the floating island main body. The floating body ensures that the artificial floating island is suspended on the water surface, and a part of river water enters the floating island, is filtered to remove pollutant substances and is discharged.
Preferably, the protective curtain is a nylon rope net with the aperture of 1-2 cm. The protective curtain is used for further contacting with river water to intercept pollutants.
Preferably, the ecological filter comprises:
a substrate layer;
a first filter layer attached to the substrate layer;
the second filtering layer is connected with the first filtering layer;
the culture layer is connected with the second filter layer, and plants are planted on the culture layer.
Preferably, the aeration device is a nano aeration device.
Preferably, the photocatalytic layer is formed by coating a photocatalyst on a mesh filter screen, and the preparation method of the photocatalyst comprises the following steps:
taking 20-30 parts by mass of graphene modified nano silver, 6-8 parts by mass of disodium hydrogen phosphate and 50-60 parts by mass of attapulgite;
dispersing graphene modified nano silver into 1000 parts by mass of deionized water, dissolving disodium hydrogen phosphate into 1000 parts by mass of deionized water, mixing the graphene modified nano silver dispersion liquid and the disodium hydrogen phosphate solution, mixing at the rotating speed of 300-400 r/min, and continuously stirring for 2-3 h to obtain a pre-modified liquid;
adding attapulgite into 500-600 parts by mass of deionized water, adding the pre-modification liquid, performing ultrasonic dispersion for 1h, stirring for 10-12 h, and aging for 24h to obtain the photocatalyst.
Preferably, the preparation method of the graphene modified nano silver comprises the following steps:
taking 0.1-0.2 parts by mass of tin dioxide, 0.3-0.5 part by mass of silver nitrate and 1-2 parts by mass of graphene oxide;
ultrasonically dispersing tin dioxide into 10 parts by mass of ethanol, dissolving silver nitrate into 10 parts by mass of ethanol, mixing ethanol dispersion liquid of tin dioxide and ethanol solution of silver nitrate, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and performing ultraviolet irradiation for 12h in nitrogen atmosphere to obtain suspension;
and dispersing graphene oxide into 100 parts by mass of ethanol, mixing the ethanol dispersion liquid of the graphene oxide with the suspension, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and carrying out ultraviolet irradiation for 12h in a nitrogen atmosphere to obtain the graphene modified nano-silver.
Preferably, the attapulgite is modified attapulgite, and the preparation method of the attapulgite comprises the following steps:
taking 8-10 parts by mass of attapulgite, 0.2-0.5 part by mass of sodium carbonate, 0.02-0.05 part by mass of sodium hydroxide and 0.01-0.03 part by mass of sodium bicarbonate;
dissolving sodium carbonate into 1000 parts by mass of deionized water, adding attapulgite, stirring at the temperature of 80-90 ℃ at 60r/min, and adding sodium bicarbonate and sodium hydroxide for three times in the stirring process;
stirring for 4h, performing ultrasonic treatment for 20min, filtering, drying and crushing to obtain the modified attapulgite. The attapulgite loaded graphene modified nano silver can effectively purify pollutants in water.
Preferably, 25-30 parts by mass of graphene modified nano silver, 7-8 parts by mass of disodium hydrogen phosphate and 55-60 parts by mass of attapulgite are taken.
Preferably, 25 parts by mass of graphene modified nano silver, 7 parts by mass of disodium hydrogen phosphate and 55 parts by mass of attapulgite are taken.
Compared with the prior art, the invention has the beneficial effects that: obviously improves the environmental quality of the river water and reduces the content of pollutants in the river water.
Drawings
Fig. 1 is a schematic diagram of a modular in-situ river ecological management recovery system.
Fig. 2 is a schematic diagram of an ecological filter of a modular in-situ river channel ecological management restoration system.
Fig. 3 is a schematic diagram of an artificial floating island of a modular in-situ river ecological management restoration system.
Detailed Description
The following examples are further illustrative of the present invention and are not intended to be limiting thereof.
Example 1
A modular in-situ river ecological management recovery system comprises:
the artificial floating island 1 is arranged in the center of a river channel;
the ecological filter 2 is arranged at a river point source pollution confluence port;
the protective curtain 3 is arranged at the upstream of the river channel for treatment or the downstream of the branch confluence part;
a photocatalytic film 4, the photocatalytic film 4 being provided in a river section;
the microorganism device 5 is arranged in the river channel;
and the aeration device 6 is arranged at the upstream of the artificial floating island 1 and the photocatalytic film 3. The artificial floating island comprises:
a floating island body 11;
and the floating body 12 is connected with the floating island body 11 through the floating body 12. The protective curtain 3 is a nylon rope net with the aperture of 1-2 cm.
The ecological filter 2 comprises:
the substrate layer 21 is connected with the artificial floating island 1;
the first filter layer 22, the first filter layer 22 is connected with the matrix layer 21;
the second filtering layer 23, the second filtering layer 23 is connected with the first filtering layer 22;
and the culture layer 24 is connected with the second filter layer 23, and plants are planted on the culture layer 24. The aeration device 6 is a nano aeration device.
The river channel is treated in situ by combining artificial floating island, ecological filter, protective curtain, photocatalysis, microorganism and aeration technologies in various modes. Effectively carries out ecological management on river water and improves the water quality. The floating body ensures that the artificial floating island is suspended on the water surface, and a part of river water enters the ecological filter tank in the floating island through the water inlet side, is filtered to remove pollutant substances and is discharged through the water outlet side. The protective curtain is used for further contacting with river water to intercept pollutants. The attapulgite loaded graphene modified nano silver can effectively purify pollutants in water.
Example 2
The embodiment 2 is different from the embodiment 1 in that the photocatalytic layer is formed by coating a photocatalyst on a mesh filter screen, and the preparation method of the photocatalyst comprises the following steps:
taking 25Kg of graphene modified nano silver, 7Kg of disodium hydrogen phosphate and 58Kg of attapulgite;
dispersing graphene modified nano silver into 1000Kg of deionized water, dissolving disodium hydrogen phosphate into 1000Kg of deionized water, mixing the graphene modified nano silver dispersion liquid and the disodium hydrogen phosphate solution, mixing at the rotating speed of 350r/min, and continuously stirring for 3 hours to obtain a pre-modified liquid;
adding attapulgite into 550Kg of deionized water, adding the pre-modified solution, performing ultrasonic dispersion for 1h, stirring for 12h, and aging for 24h to obtain the photocatalyst. The preparation method of the graphene modified nano silver comprises the following steps:
taking 3Kg of tin dioxide, 8Kg of silver nitrate and 30Kg of graphene oxide;
ultrasonically dispersing tin dioxide into 200Kg of ethanol, dissolving silver nitrate into 200Kg of ethanol, mixing the ethanol dispersion liquid of tin dioxide and the ethanol solution of silver nitrate, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and performing ultraviolet irradiation for 12h in a nitrogen atmosphere to obtain a suspension;
and dispersing graphene oxide into 2000Kg of ethanol, mixing the ethanol dispersion liquid of the graphene oxide with the suspension, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and carrying out ultraviolet irradiation for 12h in a nitrogen atmosphere to obtain the graphene modified nano-silver. The attapulgite is modified attapulgite, and the preparation method of the attapulgite comprises the following steps:
taking 63Kg of attapulgite, 2.1Kg of sodium carbonate, 0.28Kg of sodium hydroxide and 0.14Kg of sodium bicarbonate;
dissolving sodium carbonate into 7000Kg of deionized water, adding attapulgite, stirring at the stirring temperature of 85 ℃ at 60r/min, and adding sodium bicarbonate and sodium hydroxide three times during stirring;
stirring for 4h, performing ultrasonic treatment for 20min, filtering, drying and crushing to obtain the modified attapulgite.
Example 3
The embodiment 3 is different from the embodiment 1 in that the photocatalytic layer is formed by coating a photocatalyst on a mesh filter screen, and the preparation method of the photocatalyst comprises the following steps:
taking 25Kg of graphene modified nano silver, 7Kg of disodium hydrogen phosphate and 58Kg of attapulgite;
dispersing graphene modified nano silver into 1000Kg of deionized water, dissolving disodium hydrogen phosphate into 1000Kg of deionized water, mixing the graphene modified nano silver dispersion liquid and the disodium hydrogen phosphate solution, mixing at the rotating speed of 350r/min, and continuously stirring for 3 hours to obtain a pre-modified liquid;
adding attapulgite into 550Kg of deionized water, adding the pre-modified solution, performing ultrasonic dispersion for 1h, stirring for 12h, and aging for 24h to obtain the photocatalyst.
The preparation method of the graphene modified nano silver comprises the step of dispersing graphene into a silver nitrate solution.
Example 4
The embodiment 4 is different from the embodiment 1 in that the photocatalytic layer is formed by coating a photocatalyst on a mesh filter screen, and the preparation method of the photocatalyst comprises the following steps:
taking 25Kg of graphene modified nano silver, 7Kg of disodium hydrogen phosphate and 58Kg of attapulgite;
dispersing graphene modified nano silver into 1000Kg of deionized water, dissolving disodium hydrogen phosphate into 1000Kg of deionized water, mixing the graphene modified nano silver dispersion liquid and the disodium hydrogen phosphate solution, mixing at the rotating speed of 350r/min, and continuously stirring for 3 hours to obtain a pre-modified liquid;
adding attapulgite into 550Kg of deionized water, adding the pre-modified solution, performing ultrasonic dispersion for 1h, stirring for 12h, and aging for 24h to obtain the photocatalyst. The preparation method of the graphene modified nano silver comprises the following steps:
taking 3Kg of tin dioxide, 8Kg of silver nitrate and 30Kg of graphene oxide;
ultrasonically dispersing tin dioxide into 200Kg of ethanol, dissolving silver nitrate into 200Kg of ethanol, mixing the ethanol dispersion liquid of tin dioxide and the ethanol solution of silver nitrate, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and performing ultraviolet irradiation for 12h in a nitrogen atmosphere to obtain a suspension;
and dispersing graphene oxide into 2000Kg of ethanol, mixing the ethanol dispersion liquid of the graphene oxide with the suspension, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and carrying out ultraviolet irradiation for 12h in a nitrogen atmosphere to obtain the graphene modified nano-silver.
The attapulgite is common attapulgite.
Example 5
The embodiment 5 is different from the embodiment 1 in that the photocatalytic layer is formed by coating a photocatalyst on a mesh filter screen, and the preparation method of the photocatalyst comprises the following steps:
taking 25Kg of silver nitrate, 7Kg of disodium hydrogen phosphate and 58Kg of attapulgite;
dissolving silver nitrate into 1000Kg of deionized water to obtain a silver nitrate solution;
adding attapulgite into 550Kg of deionized water, adding a silver nitrate solution, ultrasonically dispersing for 1h, stirring for 12h, and aging for 24h to obtain the photocatalyst.
Comparative example 1
A modularized in-situ river channel ecological management recovery system comprises a protective curtain, wherein the protective curtain adopts the photocatalytic film in embodiment 2
Examples of the experiments
The modular in-situ river channel ecological management recovery system in the embodiment 1-5 is built in the inferior five types of river channels, water samples are collected, and COD (chemical oxygen demand) in the water samples is testedCrAnd (4) detecting the content after half a year.
The photocatalytic film in the embodiment 1 is a common photocatalytic film, and the water quality is optimized into five types of water through half a year of application, so that the effect is not very obvious.
The photocatalysis in the example 2 is a catalytic membrane prepared by the preferred photocatalyst, and the COD in river water is obviously reduced after half a yearCrThe water quality reaches the standard of the first class water.
The method for preparing the photocatalyst in the embodiment 3 is different from that in the embodiment 2 in that the silver is not modified by the graphene, the attapulgite in the embodiment 4 is not modified, and the photocatalyst in the embodiment 5 is prepared by the method. Example 3 or 4 COD PairCrThe purification efficiency of (2) was also significant, but was weaker than that of example 2. COD determination in example 5CrThe purification efficiency of (A) is lower than that of examples 2 to 4. The formula of the optimized photocatalyst can effectively improve the water quality.
In comparative example 1, only the photocatalytic film is adopted, other modules are not adopted, river water cannot be purified in other modes, and the purification capacity is poor.
The above detailed description is specific to possible embodiments of the present invention, and the above embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included in the present claims.
Claims (10)
1. The utility model provides a modularization normal position river course ecological management recovery system which characterized in that includes:
the artificial floating island is arranged in the center of the river channel;
the ecological filter tank is provided with a river channel point source pollution confluence port;
the protective curtain is arranged at the upstream of the river channel for treatment or at the downstream of the branch confluence;
a photocatalytic film disposed in a river segment;
a microbial device disposed within a river;
an aeration device disposed upstream of the artificial floating island or photocatalytic membrane.
2. The modular in-situ river ecological remediation restoration system of claim 1, wherein the artificial floating island comprises:
a floating island body;
the floating body is connected with the floating island main body.
3. The modular in-situ river ecological management restoration system according to claim 1, wherein the protective curtain is a nylon rope net with a hole diameter of 1-2 cm.
4. The modular in-situ river ecological remediation recovery system of claim 1, wherein the ecological filter comprises:
a substrate layer;
a first filter layer attached to the substrate layer;
the second filtering layer is connected with the first filtering layer;
the culture layer is connected with the second filter layer, and plants are planted on the culture layer.
5. The modular in-situ river ecological management restoration system according to claim 1, wherein the aeration device is a nano aeration device.
6. The modular in-situ river ecological management restoration system according to claim 1, wherein the photocatalytic layer is formed by coating a photocatalyst on a mesh filter layer, and the preparation method of the photocatalyst comprises:
taking 20-30 parts by mass of graphene modified nano silver, 6-8 parts by mass of disodium hydrogen phosphate and 50-60 parts by mass of attapulgite;
dispersing graphene modified nano silver into 1000 parts by mass of deionized water, dissolving disodium hydrogen phosphate into 1000 parts by mass of deionized water, mixing the graphene modified nano silver dispersion liquid and the disodium hydrogen phosphate solution, mixing at the rotating speed of 300-400 r/min, and continuously stirring for 2-3 h to obtain a pre-modified liquid;
adding attapulgite into 500-600 parts by mass of deionized water, adding the pre-modification liquid, performing ultrasonic dispersion for 1h, stirring for 10-12 h, and aging for 24h to obtain the photocatalyst.
7. The modular in-situ river ecological management restoration system according to claim 6, wherein the preparation method of the graphene modified nano silver comprises the following steps:
taking 0.1-0.2 parts by mass of tin dioxide, 0.3-0.5 part by mass of silver nitrate and 1-2 parts by mass of graphene oxide;
ultrasonically dispersing tin dioxide into 10 parts by mass of ethanol, dissolving silver nitrate into 10 parts by mass of ethanol, mixing ethanol dispersion liquid of tin dioxide and ethanol solution of silver nitrate, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and performing ultraviolet irradiation for 12h in nitrogen atmosphere to obtain suspension;
and dispersing graphene oxide into 100 parts by mass of ethanol, mixing the ethanol dispersion liquid of the graphene oxide with the suspension, ultrasonically dispersing for 1h, introducing nitrogen for 10min, and carrying out ultraviolet irradiation for 12h in a nitrogen atmosphere to obtain the graphene modified nano-silver.
8. The modular in-situ river ecological management restoration system according to claim 6, wherein the attapulgite is modified attapulgite, and the preparation method of the attapulgite comprises the following steps:
taking 8-10 parts by mass of attapulgite, 0.2-0.5 part by mass of sodium carbonate, 0.02-0.05 part by mass of sodium hydroxide and 0.01-0.03 part by mass of sodium bicarbonate;
dissolving sodium carbonate into 1000 parts by mass of deionized water, adding attapulgite, stirring at the temperature of 80-90 ℃ at 60r/min, and adding sodium bicarbonate and sodium hydroxide for three times in the stirring process;
stirring for 4h, performing ultrasonic treatment for 20min, filtering, drying and crushing to obtain the modified attapulgite.
9. The modular in-situ river ecological management restoration system according to claim 8, wherein 25-30 parts by mass of graphene-modified nano silver, 7-8 parts by mass of disodium hydrogen phosphate and 55-60 parts by mass of attapulgite are taken.
10. The modular in-situ river ecological management restoration system according to claim 8, wherein 25 parts by mass of graphene-modified nano silver, 7 parts by mass of disodium hydrogen phosphate and 55 parts by mass of attapulgite are taken.
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