CN108911017B - Photocatalytic floating bed for water body restoration - Google Patents
Photocatalytic floating bed for water body restoration Download PDFInfo
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- CN108911017B CN108911017B CN201810577659.1A CN201810577659A CN108911017B CN 108911017 B CN108911017 B CN 108911017B CN 201810577659 A CN201810577659 A CN 201810577659A CN 108911017 B CN108911017 B CN 108911017B
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
- C02F2101/363—PCB's; PCP's
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/008—Mobile apparatus and plants, e.g. mounted on a vehicle
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- 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)
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Abstract
The invention discloses a photocatalytic floating bed for water body restoration, which comprises a fixed seat, a light guide floating plate and a condenser, wherein the light guide floating plate and the condenser are fixedly connected with the fixed seat through a supporting rod; the condenser is arc-shaped, the concave surface of the condenser faces the light guide floating plate, and the condenser is connected with a light guide fiber; the light guide floating plate is a hollow cavity with openings at two ends, and an immobilized photocatalyst is filled in the hollow cavity of the light guide floating plate; one end of the optical fiber penetrates through the condenser to receive sunlight, the other end of the optical fiber extends downwards, and the optical fiber is loaded with a photocatalyst. The photocatalytic floating bed can be used for repairing water bodies of water source areas or urban landscape water bodies polluted by organic pollutants such as antibiotics, medicines, personal care products and the like, and has a good purification effect on trace organic pollutants in the water bodies.
Description
Technical Field
The invention relates to a photocatalytic floating bed for water body restoration, and belongs to the technical field of water treatment.
Background
Organic trace contaminants in aqueous environments mainly include: conventional nonbiodegradable organic pollutants, persistent organic pollutants (pesticides, industrial chemicals, and byproducts of production, abbreviated as "POPs") and emerging pollutants (pharmaceuticals and personal care products, abbreviated as "PPCPs").
A large number of different types of PPCPs are consumed annually in the world and can enter the water environment through different routes. According to recent research reports, a large number of different kinds of PPCPs and their metabolites are detected in surface water, ground water and drinking water. Although the concentration of the substances in the water environment is low at present, PPCPs have the characteristics of complex structure, difficult degradation and the like, and can cause a plurality of adverse effects on human beings and other organisms after long-term accumulation.
The ecological restoration technology is to utilize specific organisms to absorb, transform, degrade and eliminate environmental pollutants. According to different organisms, the water body ecological restoration technology commonly used at present can be divided into the following four types: microbial remediation, aquatic animal remediation, enzymatic remediation, and phytoremediation. The phytoremediation can be divided into a biological floating bed technology and an artificial wetland technology. The water ecological restoration technology has certain purification effect and water quality maintenance effect on light polluted water, but the purification effect is obviously insufficient in water with serious pollution or high content of refractory organics. Namely, no matter what water body ecological restoration technology is adopted, the problems of long time consumption, large occupied area, complex maintenance, large difference of removal effects of different types of substances and the like exist for organic trace pollutants. Therefore, the development of a photocatalytic floating bed with good purification effect on organic trace pollutants is necessary.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a photocatalytic floating bed for water body restoration, which can be used for restoring water bodies of water source areas or urban landscape water bodies polluted by organic pollutants such as antibiotics, medicines, personal care products and the like and has good purification effect.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a photocatalysis floating bed for water body restoration comprises a fixed seat, a light guide floating plate and a condenser, wherein the light guide floating plate and the condenser are fixedly connected with the fixed seat through a support rod; the condenser is arc-shaped, the concave surface of the condenser faces the light guide floating plate, and the condenser is connected with a light guide fiber; the light guide floating plate is a hollow cavity with openings at two ends, and an immobilized photocatalyst is filled in the hollow cavity of the light guide floating plate; one end of the optical fiber penetrates through the condenser to receive sunlight, the other end of the optical fiber extends downwards, and the optical fiber is loaded with a photocatalyst.
Wherein, the light guide floating plate is made of glass, quartz or plastic.
Wherein the photocatalyst on the optical fiber is a visible light response catalyst.
And the inner side wall of the hollow cavity of the light guide floating plate is coated with photoinduced energy storage luminous powder.
Wherein, the openings of two ends of the light guide floating plate are both provided with an activated carbon filter layer.
Wherein the immobilized photocatalyst is a visible light responsive photocatalyst or TiO2The carrier is prepared by being loaded on a supporting material by a cementing method or a dipping method.
Wherein, the immobilized photocatalyst is filled in the hollow cavity of the light guide floating plate in a shape of a sheet, a honeycomb, a spiral, a particle or a fiber.
Wherein the load material is activated carbon fiber, glass fiber, steel wire mesh, glass sheet or plastic.
Has the advantages that: the photocatalytic floating bed can be used for repairing water bodies of water source areas or urban landscape water bodies polluted by organic pollutants such as antibiotics, medicines, personal care products and the like, and has a quick and good purification effect on trace organic pollutants in the water bodies.
Drawings
FIG. 1 is a schematic structural view of a photocatalytic floating bed according to the present invention;
FIG. 2 is a schematic view of the internal structure of a light guide floating plate in the photocatalytic floating bed according to the present invention;
FIG. 3 is a schematic structural diagram of a photocatalytic floating bed according to the present invention, in which a sheet-like immobilized photocatalyst is filled in a light guide floating plate;
FIG. 4 is a schematic structural diagram of a light guide floating plate filled with a spiral sheet-shaped immobilized photocatalyst in the photocatalytic floating bed according to the present invention;
FIG. 5 is a schematic structural diagram of a light guide floating plate filled with honeycomb immobilized photocatalysts in a photocatalytic floating bed according to the present invention;
FIG. 6 is a schematic structural diagram of a photocatalytic floating bed according to the present invention, in which a fibrous immobilized photocatalyst is filled in a light guide floating plate;
fig. 7 is a schematic structural diagram of a light guide floating plate filled with a granular immobilized photocatalyst in the photocatalytic floating bed of the present invention.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 7, the photocatalytic floating bed for water body remediation of the present invention includes a fixed base 5, and a light guide floating plate 1 and a light collector 2 fixedly connected to the fixed base 5 through a support rod 4; the light guide floating plate 1 is of a hollow structure with openings at two ends, immobilized photocatalysts 6 are uniformly filled in a cavity of the light guide floating plate 1, the thickness of the side wall of the cavity is 1cm, the light guide floating plate 1 is made of light guide materials and has the characteristics of high light transmittance and low transmission loss, common materials of the light guide floating plate 1 are glass, quartz or plastic and the like, and the inner wall of the light guide floating plate 1 is coated with photoinduced energy storage luminous powder 7; the condenser 2 is arc-shaped and is positioned below the light guide floating plate 1, the concave surface of the condenser 2 faces the light guide floating plate 1, and the condenser 2 reflects light rays incident into water into the light guide floating plate 1 to enhance the illumination in the light guide floating plate 1; the light collector 2 is connected with the optical fiber 3, one end of the optical fiber 3 penetrates through the light collector 2 to receive sunlight, the other end of the optical fiber 3 extends downwards into the deep water body, the optical fiber 3 is loaded with a photocatalyst, the photocatalyst loaded on the optical fiber 3 is a visible light response catalyst, the optical fiber 3 can transmit light into the deep water body, and the photocatalytic removal of trace organic matters in the deep water is promoted, namely, the sunlight is transmitted into the deep water body from the surface water body through the optical fiber 3 to excite the photocatalyst loaded on the surface of the optical fiber 3, and the photocatalytic degradation removal effect on refractory organic matters in the deep water body is also achieved.
The outer surface of the light guide floating plate 1 is also provided with a transparent waterproof layer 9, a layer of photoinduced energy storage luminous powder 7 is coated between the inner wall of the cavity and the transparent waterproof layer 9, and the waterproof layer 9 can keep the properties and the structural stability of the photoinduced energy storage luminous powder 7 and realize the infinite number of times of recycling; two end openings of the light guide floating plate 1 are respectively provided with an activated carbon filter layer 8. The photocatalytic floating bed is fixed in a water body to be repaired, water flow enters a light guide floating plate 1 by depending on the flow velocity of the water body, firstly flows through an active carbon filter layer 8 at the front end part of the light guide floating plate 1, the active carbon filter layer 8 at the front end part can filter partial particulate matters in the water flow, the water flow enters a photocatalytic reaction area, organic matters which are difficult to degrade in the water body are removed by photocatalysis under the action of an immobilized photocatalyst 6 and sunlight, the water flow purified by the photocatalytic reaction area flows through the active carbon filter layer 8 at the rear end part of the light guide floating plate 1, at the moment, the active carbon filter layer 8 can prevent catalyst particles from falling off and flowing out along with the water, and the water treated by the photocatalytic floating bed flows back to a natural water body again; the photocatalytic floating bed can be modularized, a plurality of photocatalytic floating beds are transversely fixed in parallel in a water body to be restored, and the photocatalytic floating beds can also be longitudinally arranged in the water body to be restored. The compound parabolic condenser 2 in the photocatalytic floating bed can reflect the light rays incident into water to the maximum extent to the light guide floating plate 1, so that the illumination intensity in the light guide floating plate 1 is enhanced; the optical fiber 3 conducts the incident light to a certain depth of water, excites the photocatalyst 6 loaded on the surface of the optical fiber 3, and promotes the photocatalytic degradation and removal effect of trace organic matters in the deep water; at night, the photocatalytic floating bed can remove organic pollutants in water through adsorption, and meanwhile, the photoinduced energy storage luminous powder 7 which stores solar energy slowly releases energy, so that the photocatalytic floating bed has certain photocatalytic capacity at night.
The immobilized photocatalyst 6 in the photocatalytic floating bed is TiO modified by doping elements2Or other modified TiO2，g-C3N4，CaIn2S4Etc. having visible light response capability, or TiO2The photocatalyst is loaded on the surface of the load material by a glue joint method or an impregnation method, the photocatalyst is not accumulated, the load material is a material with good light transmittance, such as activated carbon fiber, glass fiber, steel wire mesh, glass sheet, plastic and the like, the load material has stable property in water, is not easy to age, does not react with the photocatalyst, has no influence on the aquatic ecological environment, has good load performance, and can avoid the refraction and reflection of light to the maximum extent; the immobilized photocatalyst 6 can be filled in the hollow cavity of the light guide floating plate 1 in a sheet shape, a honeycomb shape, a spiral shape, a granular shape or a fiber shape. Fig. 3 to 7 are schematic structural diagrams of the immobilized photocatalysts 6 in different forms filled in the cavity of the light guide floating plate 1.
The light guide floating plate 1 is immersed under the water surface, water flows through the light guide floating plate 1 by means of the flow velocity of the water, and the immobilized catalyst 6 in the light guide floating plate 1 is excited by the irradiation of natural light to generate hydroxyl free radicals and peroxy free radicals with strong oxidizing property in the water, so that the fast degradation of the organic micro-pollutants difficult to degrade in the water is realized; the invention adopts the photocatalytic floating bed to carry out on-line circulating treatment on the polluted water body, degrades organic pollutants and inorganic pollutants which are difficult to biodegrade in the water body under natural conditions, has the advantages of simple structure, modularization, high treatment efficiency, short treatment period and low energy consumption, and has no energy consumption in the operation process of the whole floating bed. The photocatalytic floating bed is fixed in a water body to be repaired through the fixing seat 5, can adapt to certain water surface fluctuation, and is convenient to construct.
When the immobilized photocatalyst 6 in the light guide floating plate 1 of the photocatalytic floating bed loses activity, the filler (comprising the immobilized photocatalyst 6 and the activated carbon filter layer 8) in the light guide floating plate 1 can be directly taken out, replaced by new material and filled in, and the original material is recycled.
The photocatalytic floating bed can be used for repairing water bodies or surface water of a water source polluted by emerging pollutants, the immobilized catalyst 6 in the floating bed is excited by irradiation of natural light to generate strong oxidation free radicals with water molecules so as to oxidize and degrade organic micro-pollutants in the water bodies, the loss of the catalyst can be effectively avoided on the basis of ensuring the degradation effect, and secondary pollution can not be caused to the water environment. Finally, the photocatalytic floating bed does not need to provide external power and artificial illumination, can slowly flow through the reaction device by depending on the flow of the water body, realizes unpowered operation, and is green and pollution-free.
Example 1
TiO doped with W element2Loading the immobilized photocatalyst 6 on glass fiber cloth (loading photocatalyst on the single surface of the fiber cloth) by a glue joint method, placing the obtained immobilized photocatalyst 6 in a light guide floating plate 1, controlling the liquid level height of the upper surface (from the surface of a water body) of the light guide floating plate 1 to be 1cm, controlling the photocatalyst loading amount of unit cubic water to be 2kg, the water flow speed to be 142mL/min, the initial concentration of atenolol in the water body to be 10mg/L, and under sunlight (the radiation illumination is 700W/m)2) After 4 hours of irradiation, the concentration of atenolol in water is 1.73mg/L, the removal rate of atenolol reaches 82.7%, and the half-life period is 4.21 hours.
Comparative example 1
Performing a biodegradation shaking table experiment on the ATL by taking water of the Tiangong river, wherein the result shows that the biodegradation half-life period of the ATL is 340 h; when 100 mu g/L ATL solution is irradiated under the sunlight, the photolysis half-life period is far more than 72 h.
By comparing the data of the embodiment 1 and the data of the comparative example 1, the method can rapidly purify trace organic matters in the water body when the photocatalytic floating bed is used for purifying the medicines in the water body, and the half-life period of atenolol is 4.21 h; while the existing water body restoration technology is used for treating trace drugs in water environment, the half-life period of the drugs is far longer than 72 h. Therefore, the adoption of the photocatalytic floating bed can greatly reduce the half-life period of atenolol and has obvious advantages for removing the medicine in the water environment.
Claims (6)
1. The utility model provides a photocatalysis floats bed for water is restoreed which characterized in that: comprises a fixed seat, a light guide floating plate and a condenser, wherein the light guide floating plate and the condenser are fixedly connected with the fixed seat through a supporting rod; the condenser is arc-shaped and is positioned below the light guide floating plate, the concave surface of the condenser faces the light guide floating plate, and the condenser reflects light rays incident into water into the light guide floating plate to enhance illumination in the light guide floating plate 1; the condenser is connected with an optical fiber; the light guide floating plate is a hollow cavity with openings at two ends, and an immobilized photocatalyst is filled in the hollow cavity of the light guide floating plate; one end of the optical fiber penetrates through the condenser to receive sunlight, the other end of the optical fiber extends downwards, and the optical fiber is loaded with a photocatalyst; the immobilized photocatalyst is filled in the hollow cavity of the light guide floating plate in a sheet shape, a honeycomb shape, a spiral shape, a granular shape or a fiber shape; the outer surface of the light guide floating plate is also provided with a transparent waterproof layer, and a layer of photoinduced energy storage luminous powder is coated between the inner wall of the cavity and the transparent waterproof layer.
2. The photocatalytic floating bed for water body remediation of claim 1, wherein: the light guide floating plate is made of glass, quartz or plastic.
3. The photocatalytic floating bed for water body remediation of claim 1, wherein: the photocatalyst on the optical fiber is a visible light response catalyst.
4. The photocatalytic floating bed for water body remediation of claim 1, wherein: and the openings at the two ends of the light guide floating plate are respectively provided with an activated carbon filter layer.
5. The photocatalytic floating bed for water body remediation of claim 1, wherein: the immobilized photocatalyst is a visible light responding photocatalyst or TiO2The carrier is prepared by being loaded on a supporting material by a cementing method or a dipping method.
6. The photocatalytic floating bed for water body remediation of claim 5, wherein: the load material is activated carbon fiber, glass fiber, steel wire mesh, glass sheet or plastic.
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| CN110803769A (en) * | 2019-11-07 | 2020-02-18 | 西安理工大学 | Black and odorous water body treatment system based on illumination enhancement |
| CN111285429A (en) * | 2020-02-29 | 2020-06-16 | 西南石油大学 | Low-transmittance sewage photocatalytic treatment composite board and preparation method thereof |
| CN112759091A (en) * | 2021-01-27 | 2021-05-07 | 华川技术有限公司 | Ecological reef for transmitting sunlight by using optical fiber |
| CN113277681A (en) * | 2021-06-11 | 2021-08-20 | 湖北近水环境工程有限公司 | Ecological treatment method of wastewater |
| CN115385455B (en) * | 2022-08-05 | 2024-05-10 | 绵阳市靓固建设工程有限公司 | Microorganism-based water ecological restoration device |
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| CN1128107C (en) * | 2001-06-20 | 2003-11-19 | 东南大学 | Light catalytic reactor for contaminant degradation |
| EP1843401A4 (en) * | 2005-01-26 | 2010-01-13 | Sumitomo Electric Industries | Surface emitting device |
| CN2885837Y (en) * | 2006-03-08 | 2007-04-04 | 青岛科技大学 | Focusing type solar photo-catalytic reactor for treating wastewater |
| CN101723555B (en) * | 2009-12-29 | 2012-04-04 | 苏州德华生态环境科技有限公司 | Photocatalytic-oxidation biological floating bed algae removing device |
| JP5264957B2 (en) * | 2011-04-15 | 2013-08-14 | シャープ株式会社 | Water purification equipment |
| CN102872780A (en) * | 2012-09-28 | 2013-01-16 | 河海大学 | Optical fiber type photoreactor immobilized on nanometer titanium dioxide photocatalysis coatings |
| CN105461005B (en) * | 2015-07-09 | 2017-12-22 | 四川大学 | A kind of Photoreactor for wastewater treatment |
| CN105712489B (en) * | 2016-02-03 | 2018-03-20 | 浙江裕腾百诺环保科技有限公司 | A kind of buoyant means of load photosynthetic bacteria for river course reparation |
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