CN211577074U - Photodegradation device for simulating organic pollutants in ice-water system - Google Patents
Photodegradation device for simulating organic pollutants in ice-water system Download PDFInfo
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- CN211577074U CN211577074U CN202020205146.0U CN202020205146U CN211577074U CN 211577074 U CN211577074 U CN 211577074U CN 202020205146 U CN202020205146 U CN 202020205146U CN 211577074 U CN211577074 U CN 211577074U
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Abstract
The utility model provides a photodegradation device for simulating organic pollutants in an ice water system, a constant temperature magnetic stirrer is arranged in a high and low temperature damp and hot test box, a bottom cover is in threaded connection with a screw at the bottom end of a PVC pipe, the middle part of an inner cavity of the PVC pipe is divided into an upper half part and a lower half part which are not communicated with each other by a round quartz plate, a magnetic stirrer rotor is arranged in the lower half part of the inner cavity of the PVC pipe, the bottom cover of the PVC pipe is vertically arranged on a heating plate of the constant temperature magnetic stirrer downwards, and a xenon lamp light source is arranged in the high and low temperature damp and hot test box and is positioned right above an opening at the top part of the PVC pipe; the device can build a low-temperature environment below zero of a water environment of the frozen river, and can simulate vertical irradiation of sunlight above the frozen river by selecting a PVC material with light-proof periphery as a container, so that errors and light source errors caused by the distribution action of organic pollutants to be analyzed in an ice water system can be eliminated, and the water phase condition in the frozen river can be better simulated to be closer to a real natural condition.
Description
Technical Field
The utility model belongs to the field of environmental chemistry, concretely relates to photodegradation device of organic pollutant in simulation ice-water system.
Background
River freezing is a common natural phenomenon in northern areas of China. After the river is frozen, the water quality characteristics, the flow speed structure and the mixing characteristics of the water body are changed by the blocking effect and the blocking effect of the ice cover, and meanwhile, the long-distance transportation and diffusion characteristics of the water quality indexes are changed. Therefore, the processes of migration, transformation, diffusion, sedimentation, resuspension, volatilization and the like of organic pollutants in the river are influenced by different degrees, so that the accumulation degree of the pollutants in the river is higher and the pollution degree is heavier in the freezing period compared with other water periods. Photodegradation is one of the main degradation modes of most organic pollutants, and is also an important migration and transformation path of the pollutants in the environment. The research on the aspects of migration and transformation of pollutants in a water environment and the like which is widely developed at present is basically focused on a smooth water body without ice body coverage, but the research on the environmental behavior of the pollutants in the frozen-sealed river is not sufficiently developed, so that the research on the photodegradation characteristics of the organic pollutants in the water environment of the frozen-sealed river has important significance, and the simulation of the photodegradation behavior of the organic pollutants in the water environment of the frozen-sealed river in a laboratory becomes a foundation. Most of the existing photodegradation reaction devices are commercially available photoreactors, and the specific operation is to place the organic pollutants to be researched in the photoreactor to carry out photodegradation experiments. However, most photoreactors do not create a low temperature environment inside and thus cannot study the photodegradation of organic contaminants that are involved below zero degrees celsius. And the special complex system of water and ice such as the frozen river is difficult to maintain. Besides, the proportion of the ice water cannot be accurately maintained, and meanwhile, organic pollutants have a distribution effect among the ice water and must have an influence on the photodegradation experiment. Accordingly, there is an increasing demand for a photodegradation apparatus suitable for organic pollutants in the water environment of a frozen river by related workers.
Disclosure of Invention
The utility model aims to provide a shortcoming such as unable building low temperature environment, difficult maintaining of existing photodegradation device existence seals the river flow ice-water system of freezing, unable elimination organic matter distribution effect between the frozen water provides a photodegradation device of organic pollutant in simulation ice-water system, and the device includes high low temperature damp heat proof box, xenon lamp light source, constant temperature magnetic stirrers, rotor, PVC pipe, quartz plate. The device can build an environment below zero centigrade, can better simulate a freezing river ice-water system and reduce experimental errors caused by distribution action.
In order to solve the technical problem, the utility model discloses an adopt following technical scheme to realize:
a photodegradation device for simulating organic pollutants in an ice-water system is characterized by comprising a high-low temperature damp-heat test box, a xenon lamp light source, a PVC pipe and an 85-2 type constant temperature magnetic stirrer, wherein the 85-2 type constant temperature magnetic stirrer is arranged in the high-low temperature damp-heat test box, the PVC pipe is of a hollow tubular structure with the top end free of a top cover, the bottom end of the PVC pipe is a screw with internal threads, a bottom cover with external threads is in threaded connection with the screw to seal the bottom end of the PVC pipe, a round quartz plate is fixed and horizontally arranged in the middle of an inner cavity of the PVC pipe, the inner cavity of the PVC pipe is further divided into an upper half part and a lower half part of the inner cavity which are not communicated, a magnetic stirrer rotor is arranged in the lower half part of the inner cavity of the PVC pipe, one end of the PVC pipe with the bottom cover is downwards vertically arranged on a heating plate of the 85-2 type constant, the PVC pipe and a heating disc of the constant-temperature magnetic stirrer are concentrically arranged, and the xenon lamp light source is arranged in the high-low temperature damp-heat test box and is positioned right above the top opening of the PVC pipe.
The further technical scheme comprises the following steps:
a through hole is formed in one side wall of the high-low temperature damp-heat test box, and a power line of a xenon lamp light source and a power line of the 85-2 type constant-temperature magnetic stirrer penetrate through the through hole of the high-low temperature damp-heat test box to extend out of the high-low temperature damp-heat test box and are connected with a power source located outside the high-low temperature damp-heat test box.
And a sealing ring is arranged between the power line of the xenon lamp light source and the hole wall of the through hole of the high-low temperature damp-heat test box.
The PVC tube has the inner diameter of 5-11 cm, the height of 16-23 cm, the thickness of a quartz plate of 1-5 mm, the power of a xenon lamp light source of 250-350W, and the model of a high-low temperature damp-heat test box is BPHS-120C.
The magnetic stirrer rotor is a polytetrafluoroethylene magnetic stirrer.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the device can build a low-temperature environment below zero for sealing a frozen river water environment, and can simulate vertical irradiation of sunlight above the frozen river by selecting the PVC material with light-proof periphery as a container.
(2) The device can eliminate errors and light source errors caused by the distribution effect of the organic pollutants to be analyzed in an ice water system.
(3) The device can better simulate the water phase conditions (temperature and disturbance) in the frozen river to enable the water phase conditions to be closer to natural conditions.
Drawings
The invention will be further described with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the device comprises a high-low temperature test chamber, 2 a xenon lamp light source, 3 quartz plates, 4 PVC pipes, 5 a magnetic stirrer rotor and 6 a magnetic stirrer.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
this example further describes the structure and working principle of the device by taking the study of the photodegradation characteristics of diclofenac in a simulated ice-water system.
As shown in FIG. 1, the utility model discloses a photodegradation device for simulating organic pollutants in ice-water system, including high low temperature damp heat test box 1, xenon lamp light source 2, quartz piece 3, PVC pipe 4, magnetic stirrer rotor 5, constant temperature magnetic stirrer 6. The model of the high-low humidity-heat-temperature test box 1 is BPHS-120C, the length is 70cm, the width is 104cm, the power is 9000W, the thickness of a quartz plate 3 with the power of a xenon lamp light source 2 being 300W is 3mm, the inner diameter of a PVC pipe 4 is 7.5cm, the height is 20cm, a constant-temperature magnetic stirrer 6 is 85-2, and a magnetic stirrer rotor 5 is a polytetrafluoroethylene magnetic stirrer.
The 85-2 type constant temperature magnetic stirrer 6 is arranged in the high-low temperature damp-heat test box 1, the PVC pipe 4 is a hollow tubular structure with the top end without a top cover, the bottom end of the PVC pipe 4 is a screw with internal threads, a bottom cover with external threads is in threaded connection with the screw to seal the bottom end of the PVC pipe 4, the round quartz plate 3 is fixed and horizontally arranged in the middle of the inner cavity of the PVC pipe 4, further dividing the inner cavity of the PVC pipe 4 into an upper inner cavity half part and a lower inner cavity half part which are not communicated with each other, placing the magnetic stirrer rotor 5 in the lower inner cavity half part of the PVC pipe 4, one end of the PVC pipe 4 with the bottom cover is vertically placed on a heating plate of an 85-2 type constant-temperature magnetic stirrer 6 downwards, so that the PVC pipe 4 and the heating plate of the constant-temperature magnetic stirrer 6 are concentrically placed, and the xenon lamp light source 2 is arranged in the high-low temperature damp-heat test box 1 and is positioned right above the top opening of the PVC pipe 4. One side wall of the high-low temperature damp-heat test box 1 is provided with a through hole communicated with the inside of the high-low temperature damp-heat test box 1 (the through hole can be sealed by a blocking cover when not in use), and a power line of the xenon lamp light source 2 and a power line of the 85-2 type constant temperature magnetic stirrer 6 both penetrate through the through hole of the high-low temperature damp-heat test box 1 to extend out of the high-low temperature damp-heat test box 1 and are connected with a power supply positioned outside the high-low temperature damp-heat test box 1. In order to increase the air tightness, a sealing ring is arranged between a wire harness consisting of a power line of the xenon lamp light source 2 and a power line of the 85-2 type constant temperature magnetic stirrer 6 and the hole wall of the through hole of the high-low temperature damp-heat test box 1.
Use a simulation ice-water system in organic pollutant's photodegradation device carry out experimental process as follows:
the prepared diclofenac solution of 500ng/L is placed in another freezing PVC pipe which has the same size as the PVC pipe 4 and does not contain quartz chips for freezing so as to carry out an ice-water distribution experiment, when the ice-water ratio in the freezing PVC pipe is 1:1, an ice phase and a water phase are separated, and when the ice phase is melted, the concentrations of the ice phase and the water phase are respectively measured by a liquid chromatography tandem mass spectrum. 250mL of diclofenac solution with well-determined concentration of ice phase and water phase are prepared respectively. Placing the prepared diclofenac solution corresponding to the ice into a heat-preservation PVC pipe which has the same size as the PVC pipe 4 and is wrapped with heat-preservation cotton at the outer side, vertically freezing the diclofenac solution from top to bottom in a refrigerator at the temperature of-20 ℃ to obtain a diclofenac ice sample to be analyzed, and storing the prepared diclofenac solution of 500ng/L at low temperature before obtaining the diclofenac ice sample to be analyzed. All the above processes were kept protected from light.
500ng/L of diclofenac solution to be analyzed is added into the lower half part of the inner cavity of the PVC pipe 4 from the side of the PVC pipe 4 with the screw, then the rotor 5 of the magnetic stirrer is placed into the lower half part of the inner cavity of the PVC pipe 4, the bottom cover is screwed on the screw, and then the side of the PVC pipe 4 with the bottom cover is placed downwards on the heating plate of the constant-temperature magnetic stirrer 6. The diclofenac ice sample to be analyzed is placed directly in the upper half of the lumen of the PVC tube 4 (above the quartz plate 3). And (3) adjusting the temperature of the high-low temperature damp-heat test box 1 to-20 ℃, opening the constant-temperature magnetic stirrer 6, and adjusting the constant-temperature magnetic stirrer 6 to enable the rotating speed of the magnetic stirrer rotor 5 to be 150r/min so that the magnetic stirrer rotor 5 stirs the diclofenac solution to be analyzed at the lower half part of the inner cavity of the PVC pipe 4 to simulate the effect of river disturbance. The heating temperature of the heating plate of the constant temperature magnetic stirrer 6 is adjusted to 2 ℃ by using the heating function of the constant temperature magnetic stirrer 6, so that the temperature of the water phase in the lower half part of the inner cavity of the PVC pipe 4 gradually reaches the temperature close to the actual temperatureAnd (5) sealing and freezing the temperature of the river water phase. Turning on the xenon lamp light source 2, adjusting the distance from the xenon lamp light source 2 to the upper surface of the diclofenac ice sample to be analyzed to ensure that the irradiance of the xenon lamp light source 2 on the upper surface of the diclofenac ice sample to be analyzed is 85W/m2The irradiation angle of the xenon lamp light source 2 is adjusted according to the irradiance of the sunlight simulating the river freezing period, so that the simulated sunlight irradiates from the right upper side to simulate the photodegradation of the diclofenac in the ice-water system. And stopping illumination after six hours of illumination, taking out the diclofenac ice sample and the diclofenac water sample, wherein the diclofenac ice sample needs to be naturally melted away from the sun to facilitate the detection of the concentration, and the illuminated diclofenac water sample is stored away from the sun at low temperature. After the diclofenac ice sample naturally melts, the concentration of the diclofenac ice sample and the diclofenac water sample after illumination is detected by liquid chromatography-tandem mass spectrometry so as to research the photodegradation behavior characteristics of the diclofenac in a simulated ice-water system.
Claims (5)
1. A photodegradation device for simulating organic pollutants in an ice-water system is characterized by comprising a high-low temperature damp-heat test box (1), a xenon lamp light source (2), a PVC pipe (4) and an 85-2 type constant-temperature magnetic stirrer (6), wherein the 85-2 type constant-temperature magnetic stirrer (6) is arranged in the high-low temperature damp-heat test box (1), the PVC pipe (4) is of a hollow tubular structure without a top cover at the top end, the bottom end of the PVC pipe (4) is a screw socket with internal threads, a bottom cover with external threads is in threaded connection with the screw socket to seal the bottom end of the PVC pipe (4), a round quartz plate (3) is fixed and horizontally arranged in the middle of an inner cavity of the PVC pipe (4), the inner cavity of the PVC pipe (4) is further divided into an upper inner cavity half and a lower cavity half which are not communicated, a magnetic stirrer rotor (5) is arranged in the lower cavity half of the PVC pipe (4), one end of the PVC pipe (4) with the bottom cover is vertically placed on a heating plate of an 85-2 type constant-temperature magnetic stirrer (6) downwards, the PVC pipe (4) and the heating plate of the constant-temperature magnetic stirrer (6) are concentrically placed, and the xenon lamp light source (2) is arranged in the high-low temperature damp-heat test box (1) and is positioned right above the top opening of the PVC pipe (4).
2. The device for simulating the photodegradation of organic pollutants in an ice-water system as claimed in claim 1, wherein a through hole is formed in one side wall of the high-low temperature damp-heat test chamber (1), and the power line of the xenon lamp light source (2) and the power line of the 85-2 type constant temperature magnetic stirrer (6) both extend out of the high-low temperature damp-heat test chamber (1) through the through hole of the high-low temperature damp-heat test chamber (1) and are connected with a power supply positioned outside the high-low temperature damp-heat test chamber (1).
3. The photodegradation device for simulating the organic pollutants in the ice-water system according to claim 2, wherein a sealing ring is arranged between the power line of the xenon lamp light source (2) and the wall of the through hole of the high-low temperature damp-heat test chamber (1).
4. The photodegradation device for simulating organic pollutants in an ice-water system according to claim 1, wherein the PVC tube (4) has an inner diameter of 5-11 cm and a height of 16-23 cm, the quartz plate (3) has a thickness of 1-5 mm, the xenon lamp light source (2) has a power of 250-350W, and the high-low temperature damp-heat test chamber (1) has a model of BPHS-120C.
5. A photodegradation device for simulating organic pollutants in an ice-water system according to claim 1, wherein the magnetic stirrer rotor (5) is a teflon magnetic stirrer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020205146.0U CN211577074U (en) | 2020-02-25 | 2020-02-25 | Photodegradation device for simulating organic pollutants in ice-water system |
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| CN202020205146.0U CN211577074U (en) | 2020-02-25 | 2020-02-25 | Photodegradation device for simulating organic pollutants in ice-water system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976617A (en) * | 2021-11-08 | 2022-01-28 | 中国科学院沈阳应用生态研究所 | Device and method for degrading petroleum hydrocarbon in soil by simulating sunlight irradiation |
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2020
- 2020-02-25 CN CN202020205146.0U patent/CN211577074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976617A (en) * | 2021-11-08 | 2022-01-28 | 中国科学院沈阳应用生态研究所 | Device and method for degrading petroleum hydrocarbon in soil by simulating sunlight irradiation |
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