CN108008070A - It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant - Google Patents

It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant Download PDF

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Publication number
CN108008070A
CN108008070A CN201711171827.9A CN201711171827A CN108008070A CN 108008070 A CN108008070 A CN 108008070A CN 201711171827 A CN201711171827 A CN 201711171827A CN 108008070 A CN108008070 A CN 108008070A
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reaction
gas
photochemical
pollution
organic pollution
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王洪
陈红亮
王鑫
王国庆
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Shenyang University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004Gaseous mixtures, e.g. polluted air
    • G01N33/0009General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0062General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004Gaseous mixtures, e.g. polluted air
    • G01N33/0009General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0039O3
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant, it is related to a kind of air pollution analysis method, the described method includes procedure below:To occur first in simulated atmosphere photochemically reactive experimental provision it is closed after, connect and open vacuum pump operation 5 10 minutes, the gas in withdrawing device;Close bleeding point valve;The ultraviolet lamp in reaction unit is opened, high pure nitrogen purge purifies reaction babinet again;Reaction gas inlet valve is opened, is passed through a certain concentration and the organic pollution of species;Close reaction gas inlet valve;Power on, open the ultraviolet lamp in reaction chamber body, start photochemical reaction;By the situation of change and generation product of specific organic pollution in qualitative and quantitative analysis reacting gas, determine the possible mechanism of organic pollution photochemical reaction with forming the path of photochemical fog.So as to targetedly carry out photochemical reaction processing to pollution by path.

Description

It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant
Technical field
The present invention relates to a kind of analysis method to atmosphere pollution, and atmosphere organic pollutant is sent out more particularly to a kind of Raw photochemically reactive analysis method.
Background technology
In recent years, the trans-regional property of atmosphere pollution, the complexity of pollution, caused by health the features such as serious threat So that atmosphere pollution(Especially PM2.5Pollution)Problem is especially prominent in various environmental problems.
Urbanization in China constantly expands with commercial scale, and vehicle guaranteeding organic quantity increases very fast, tail gas pollution of motor-driven vehicle Problem is also more and more prominent, and the atmosphere pollution of urban is also converted from coal smoke type to photochemical fog type.Photochemical fog It is the oxynitrides in air to primarily form mechanism(NOx:NO、NO2)And volatile organic compounds(VOCs)Deng primary pollution Thing, reacts under solar ultraviolet irradiation by a series of photochemical reactions and ozonisationization, generation ozone, Peracetic acid nitre The secondary pollutions such as acid esters, aldoketones.Early in the forties in last century, U.S. Lip river China fir sound of a bird chirping, Tokyo and Australia etc. are all Photochemical fog occurred.
Atmospheric photochemical reaction is O3Pollution and secondary particulate(SOA)Main source, SOA is molten compared to once gas Glue toxicity is stronger, either all has the harmfulness of bigger to the ecosystem or human health.VOCs is as photochemical reaction Primary Actor, there is active chemical reactivity, be oxidizing capacity enhancing equivalent to the fuel of atmospheric oxidn process Key factor, can not only participate in photochemical reaction generation O3And Peroxyacetyl nitrate(PAN)The pollution very strong etc. oxidisability Thing, it is also possible to trigger photochemical fog, cause more serious harm.Correlative study the result shows that, the volatilization discharged into the atmosphere Property organic compound (VOCs), including various alkane, alkene, fragrant hydrocarbons and their derivates, with the nitrogen oxides (NO in environmentx), React under ultraviolet irradiation, the probability for forming photochemical fog constantly increases.Photochemical pollution goes out in various regions Existing frequency is higher and higher, and the annual exceeded number of days of ozone is in rising trend.Have been reported and show, the part such as China northeast, North China Area is when the autumn and winter are alternately, in PM2.5For in the serious haze weather of major pollutants, often with photochemical pollution The generation of phenomenon.
Therefore, carry out the research of the associated analogs such as the photochemical reaction of atmosphere organic pollutant, study volatile organic compound The reaction of nitrogen oxides in thing (VOCs) and air, inquires into photochemical fog formation mechenism, has important theoretical and actual Meaning.
The content of the invention
Photochemically reactive analysis method, this method are occurred to atmosphere organic pollutant the object of the present invention is to provide a kind of The reaction of the specific organic pollution and air nitrogen oxides in controlled condition Imitating air is realized, so as to find processing The method of pollution finds path.
The purpose of the present invention is what is be achieved through the following technical solutions:
It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant, include the following steps:
1. will occur first in simulated atmosphere photochemically reactive experimental provision it is closed after, connect and open vacuum pump operation 5-10 Minute, the gas in withdrawing device;Bleeding point valve is closed, high pure nitrogen is then passed to and carries out purging 5-10 minutes, treat device Interior pressure closes gas inlet valves after being higher than external pressure, and such iterative cycles 2 ~ 3 times, treat last time vacuum pump operation Finish, close bleeding point valve;
2. the ultraviolet lamp in unlatching reaction unit 20 ~ 30 minutes, after the organic pollution exhaustive oxidation in babinet, again by Pumping-high pure nitrogen purge purifies reaction babinet again;
3. opening reaction gas inlet valve, a certain concentration and the organic pollution of species are passed through;It is passed through newly-generated NO2Gas Body, after gas pressure is slightly above external pressure in device, closes reaction gas inlet valve;
4. powering on, the ultraviolet lamp in reaction chamber body is opened, starts photochemical reaction(5 ~ 10 it is small when), it is every to start every other hour Sample is gathered, organic pollution in sample is divided using instrument and equipments such as gas chromatograph, gas chromatograph-mass spectrometer (GC-MS)s Analysis test, utilizes the ozone content in ozone analyzer determination sample;
5. by the situation of change and generation product of specific organic pollution in qualitative and quantitative analysis reacting gas, determine The possible mechanism of organic pollutants photochemical reaction and the path for forming photochemical fog;
So as to targetedly carry out photochemical reaction processing to pollution by path.
Advantages of the present invention is with effect:
The photochemical reaction that the present invention can be occurred in the specific organic pollution in controlled condition Imitating air, method are real Apply simply, it is workable.The correlative simulation methods such as the photochemical reaction of atmosphere organic pollutant are realized, analyze volatility The reaction of organic compound (VOCs) and the nitrogen oxides in air, i.e. photochemical fog formation mechenism, find processing pollution Path, has important theoretical and practical significance.
Embodiment
With reference to embodiment, the present invention is described in detail.
Embodiment:1
To occur first in simulated atmosphere photochemically reactive experimental provision all carry out it is closed after, connect and open vacuum pump fortune Row 10 minutes, the gas in withdrawing device;Bleeding point valve is closed, high pure nitrogen is then passed to and carries out purging 10 minutes, it is to be installed Pressure in putting closes gas inlet valves after being higher than external pressure.Above procedure iterative cycles 3 times, treat last time vacuum pump Operation finishes, and closes bleeding point valve.Ultraviolet lamp in unlatching reaction unit 30 minutes, will be remaining micro organic in babinet Pollutant exhaustive oxidation, purifies reaction babinet again by pumping-high pure nitrogen purge again.Open reacting gas Inlet valve, note toluene, dimethylbenzene, is passed through newly-generated NO2Gas, treats that the gas pressure in device is slightly above external pressure Afterwards, reaction gas inlet valve is closed.Power on, open the ultraviolet lamp in reaction chamber body, start photochemical reaction, during reaction Between for 10 it is small when, per start every other hour gather sample, using gas chromatograph, gas chromatograph-mass spectrometer (GC-MS) in sample Organic matter is tested, and utilizes the ozone content in ozone analyzer determination sample.By analyzing toluene in reacting gas, diformazan The situation of change and generation product of benzene, infer toluene, the possible mechanism of dimethylbenzene photochemical reaction with forming photochemical fog Possibility.
Embodiment:2
To occur first in simulated atmosphere photochemically reactive experimental provision all carry out it is closed after, connect and open vacuum pump fortune Row 10 minutes, the gas in withdrawing device;Bleeding point valve is closed, high pure nitrogen is then passed to and carries out purging 8 minutes, treat device Interior pressure closes gas inlet valves after being higher than external pressure.Above procedure iterative cycles 3 times, treat that last time vacuum pump is transported Row finishes, and closes bleeding point valve.Ultraviolet lamp in unlatching reaction unit 20 minutes, by remaining micro organic dirt in babinet Thing exhaustive oxidation is contaminated, reaction babinet is purified again again by pumping-high pure nitrogen purge.Reacting gas is opened to enter Mouth valve, notes propane, is passed through newly-generated NO2Gas, after the gas pressure in device is slightly above external pressure, is closed anti- Answer gas inlet valves.Power on, open the ultraviolet lamp in reaction chamber body, start photochemical reaction, the reaction time is small for 10 When, per collection sample is started every other hour, using gas chromatograph, gas chromatograph-mass spectrometer (GC-MS) to organic contamination in sample Thing is tested, and utilizes the ozone content in ozone analyzer determination sample.By the change feelings for analyzing propane in reacting gas Condition and the secondary particulate product of generation, the announcement possible mechanism of propane photochemical reaction can with formation photochemical fog Energy.
Embodiment:3
To occur first in simulated atmosphere photochemically reactive experimental provision all carry out it is closed after, connect and open vacuum pump fortune Row 8 minutes, the gas in withdrawing device;Bleeding point valve is closed, high pure nitrogen is then passed to and carries out purging 8 minutes, treat device Interior pressure closes gas inlet valves after being higher than external pressure.Above procedure iterative cycles 3 times, treat that last time vacuum pump is transported Row finishes, and closes bleeding point valve.Ultraviolet lamp in unlatching reaction unit 30 minutes, by remaining micro organic dirt in babinet Thing exhaustive oxidation is contaminated, reaction babinet is purified again again by pumping-high pure nitrogen purge.Reacting gas is opened to enter Mouth valve, injects propylene and newly-generated NO2Gas, after the gas pressure in device is slightly above external pressure, is closed anti- Answer gas inlet valves.Power on, open the ultraviolet lamp in reaction chamber body, start photochemical reaction, the reaction time is small for 8 When, per collection sample is started every other hour, using gas chromatograph, gas chromatograph-mass spectrometer (GC-MS) to organic contamination in sample Thing is tested, and utilizes the ozone content in ozone analyzer determination sample.By the change feelings for analyzing propylene in reacting gas Condition and generation product, the deduction propylene photochemical reaction generation possible product of secondary particulate can with formation photochemical fog Energy.

Claims (1)

1. a kind of occur photochemically reactive analysis method to atmosphere organic pollutant, it is characterised in that the described method includes with Lower process:
1)To occur first in simulated atmosphere photochemically reactive experimental provision it is closed after, connect and open vacuum pump operation 5- 10 minutes, the gas in withdrawing device;Bleeding point valve is closed, high pure nitrogen is then passed to and carries out purging 5-10 minutes, it is to be installed Pressure in putting, which is higher than after external pressure, closes gas inlet valves, and such iterative cycles 2 ~ 3 times, treat that last time vacuum pump is transported Row finishes, and closes bleeding point valve;
2)Ultraviolet lamp in unlatching reaction unit 20 ~ 30 minutes, after the organic pollution exhaustive oxidation in babinet, leads to again Pumping-high pure nitrogen purge is crossed to purify reaction babinet again;
3)Reaction gas inlet valve is opened, is passed through a certain concentration and the organic pollution of species;It is passed through newly-generated NO2Gas Body, after gas pressure is slightly above external pressure in device, closes reaction gas inlet valve;
4)Power on, open the ultraviolet lamp in reaction chamber body, it is every to start every other hour when beginning photochemical reaction 5 ~ 10 is small Sample is gathered, organic pollution in sample is divided using instrument and equipments such as gas chromatograph, gas chromatograph-mass spectrometer (GC-MS)s Analysis test, utilizes the ozone content in ozone analyzer determination sample;
5)By the situation of change and generation product of specific organic pollution in qualitative and quantitative analysis reacting gas, determine The possible mechanism of organic pollution photochemical reaction and the path for forming photochemical fog.
CN201711171827.9A 2017-11-22 2017-11-22 It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant Withdrawn CN108008070A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108877370A (en) * 2018-06-28 2018-11-23 西安建筑科技大学 A kind of teaching and experiment method of Atmospheric Photochemical Smog pollution
CN109754692A (en) * 2019-03-11 2019-05-14 北京大学 One kind being used for the photochemically reactive device of simulated atmosphere pollutant
CN113899846A (en) * 2021-09-13 2022-01-07 四川大学 Ambient air O3Device and method for measuring potential generation

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108877370A (en) * 2018-06-28 2018-11-23 西安建筑科技大学 A kind of teaching and experiment method of Atmospheric Photochemical Smog pollution
CN109754692A (en) * 2019-03-11 2019-05-14 北京大学 One kind being used for the photochemically reactive device of simulated atmosphere pollutant
CN113899846A (en) * 2021-09-13 2022-01-07 四川大学 Ambient air O3Device and method for measuring potential generation

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