CN109212072A - A kind of rustic source remittance recognition methods of polycyclic aromatic hydrocarbon - Google Patents
A kind of rustic source remittance recognition methods of polycyclic aromatic hydrocarbon Download PDFInfo
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Abstract
The present invention relates to a kind of rustic source remittance recognition methods of polycyclic aromatic hydrocarbon, in preparation, soil and air including the polyethylene film adsorbent material containing marker the in situ sampling of polyethylene film adsorbent material and pretreatment, soil and Polycyclic Aromatic Hydrocarbons In Alr equilibrium concentration calculate and rustic exchange process in polycyclic aromatic hydrocarbon migratory direction judge Four processes, source remittance pattern of the polycyclic aromatic hydrocarbon in rustic exchange process is identified under certain environmental conditions.Present invention sampling is at low cost, it is not limited by power supply and the noise factors such as disturb residents, sample handling processes are simple, to 12 kinds of polycyclic aromatic hydrocarbons rustic exchange source remittance pattern accuracy of judgement, converge and accurately identify suitable for the rustic source of polycyclic aromatic hydrocarbon under the environmental conditions such as farmland, contaminated site, residential area.
Description
Technical field
The invention belongs to remittance identification technology fields in source in environmental monitoring field, more particularly, to a kind of rustic source of polycyclic aromatic hydrocarbon
Converge recognition methods, polycyclic aromatic hydrocarbon migratory direction in the rustic exchange process of identification decision.
Background technique
Polycyclic aromatic hydrocarbon has three cause effects, is difficult to be degraded in the environment, can be accumulated and be amplified by food chain, and by
The extensive concern of people.Polycyclic aromatic hydrocarbon has the characteristics such as volatile and difficult to degrade, constantly " can volatilize-move in surrounding medium
Shifting-sedimentation " carries out long distance transmission in Global Scale, and this " grasshopper jumps effect " causes in mankind such as High aititudes even polar region
The less area of activity can detect these persistence organic pollutants.
Soil is the important carrier of persistence organic pollutant, and air is the important matchmaker that persistence organic pollutant is propagated
It is situated between.The rustic exchange process of polycyclic aromatic hydrocarbon is critical process of the pollutant in transmission and home to return to, identifies polycyclic aromatic hydrocarbon in actual environment
Rustic source converge pattern, facilitate determine polluted soil whether be air polycyclic aromatic hydrocarbon pollution source or air pass
Defeated is the polycyclic aromatic hydrocarbons contaminated important channel of soil.For example, the Qinghai-Tibet Platean weaker in mankind's activity, soil is both that epipodium is polycyclic
The remittance of aromatic hydrocarbons, and be the potential pollution source of low ring polycyclic aromatic hydrocarbon in air, but for six six six and DDTs, soil is
It converges.In Hangzhou, agricultural and industrial area are it has also been found that there is polycyclic aromatic hydrocarbon to be volatized into air from soil.
In the research rustic exchange process of polycyclic aromatic hydrocarbon, generallys use compare in soil and the ease of Polycyclic Aromatic Hydrocarbons In Alr at present
Size is spent, to determine polycyclic aromatic hydrocarbon in the migratory direction of rustic exchange process.It is more when measuring the fugacity of Polycyclic Aromatic Hydrocarbons In Alr
Using the active method of sampling.Surrounding air is drawn for electric drive air pump using municipal administration, sampling process has certain noise pollution,
So being limited in farmland and forest land region by powering, limited in residential area by noise pollution.It is polycyclic in measurement soil
When aromatic hydrocarbons fugacity, usually first measure soil on polycyclic aromatic hydrocarbon can complete extracting concentration, then be based on organic matter adsorption/absorption model
Calculate polycyclic aromatic hydrocarbon fugacity.In organic matter adsorption/absorption model calculating process, need to utilize rustic distribution coefficient (Ksoil-air)
Fugacity calculating is carried out, although by the content of organic matter and black carbon content to Ksoil-airBe modified, but still there are it is biggish not
Certainty (> 50%), affects the accuracy of object fugacity in soil, finally influence rustic exchange migration direction judgement and
The identification that source is converged.
Based on a kind of polycyclic aromatic hydrocarbon source remittance knowledge method for distinguishing under above-mentioned background, is developed, power supply and noise can be both reduced
Pollution limitation, and can be to avoid by KSoil-AirCalculating error caused by fugacity ratio error, improve rustic exchange source and converge and know
Other accuracy has become problem in the urgent need to address in environmental monitoring work.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of polycyclic aromatic hydrocarbon is rustic
Converge recognition methods in source, can not be only sufficient to reduce the influence for disturbing residents to urban electricity supply limitation and noise with this method, and can eliminate
Rustic distribution coefficient (Ksoil-air) bring uncertainty, accurately identify the rustic source remittance lattice of polycyclic aromatic hydrocarbon under true environment
Office.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of rustic source remittance recognition methods of polycyclic aromatic hydrocarbon, passes through polyethylene film and adsorbs polycyclic virtue in soil and air in situ
Hydrocarbon, when polyethylene film reaches adsorption equilibrium, the polycyclic aromatic hydrocarbon adsorption equilibrium concentration of polyethylene film in soil and air
Difference reflects the source remittance pattern of rustic exchange process polycyclic aromatic hydrocarbon, using following steps:
(1) preparation of the polyethylene film adsorbent material containing marker
'-dibromobiphenyl, four bromo biphenyls, five bromo biphenyls, Octachloronaphthalene, deuterated pyrene are dissolved in methanol aqueous solution, are configured to
PRCs solution；
It successively uses water, acetone, methylene chloride and n-hexane to impregnate 20-40 hours the polyethylene film cut, then uses
PRCs solution impregnates 20-60 days, is sealed after taking-up, the polyethylene film adsorbent material containing marker is prepared；
(2) in situ sampling of polyethylene film adsorbent material and pretreatment in soil and air
The in situ sampling of polyethylene film adsorbent material in soil: the polyethylene film adsorbent material containing marker is hung down
It is directly placed in topsoil, polyethylene film adsorbs PAHs in soil and carries out the acquisition of original position soil sample, adsorbs 10-60
It takes out and saves after it；
The in situ sampling of polyethylene film adsorbent material in air: the polyethylene film adsorbent material containing marker is hanged
Vacant absorption Polycyclic Aromatic Hydrocarbons In Alr carries out air sample acquisition in situ in air, and absorption fetched preservation after 10-60 days；
Pretreatment: the polyethylene film adsorbent material after sampling is washed with water, and removes surface impurity, is added deuterated polycyclic
Aromatic hydrocarbons is to polyethylene film adsorbent material surface, and polyethylene film adsorbs after successively impregnating sampling using methylene chloride and n-hexane
Then material 16-48h mixes methylene chloride soak and n-hexane soak, solvent is replaced as n-hexane and is concentrated, then plus
Enter deuterated fluorenes, completes sample pretreatment.
(3) soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration calculation
Polycyclic aromatic hydrocarbon concentration and PRCs concentration of component in polyethylene film adsorbent material after measurement pretreatment, after sampling
The residual concentration of PRCs component in polyethylene film adsorbent material, polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after calculating sampling
Adsorption equilibrium percentage, after amendment sampling in polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption concentration, obtain soil and
In air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration；
(4) polycyclic aromatic hydrocarbon migratory direction judges in rustic exchange process
According in soil and air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration, meter
Calculate soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air), judge polycyclic aromatic hydrocarbon rustic exchanged
Migratory direction in journey, wherein CPE-soilFor PAHs in soil adsorption equilibrium concentration, CPE-airFor Polycyclic Aromatic Hydrocarbons In Alr suction
Attached equilibrium concentration.
The quality of '-dibromobiphenyl described in step (1), four bromo biphenyls, five bromo biphenyls, Octachloronaphthalene, deuterated pyrene, first alcohol and water
Than for 1.0-3.0:0.2-1.2:0.1-0.6:0.25-2.5:0.25-2.5:1.0-3.2 × 106:0.8-3.0×106。
The mass ratio of the deuterated polycyclic aromatic hydrocarbon and deuterated fluorenes that are added in step (2) is 1:1, the deuterated polycyclic aromatic hydrocarbon of addition with
The mass ratio of '-dibromobiphenyl is 1 × 10-4:1.0-3.0。
Using polycyclic in polyethylene film adsorbent material after gas-chromatography and mass spectrometer measurement pretreatment in step (3)
Density of aromatic hydrocarbon and PRCs concentration of component.
According to after sampling in polyethylene film adsorbent material PRCs component residual concentration, calculate sampling after polyethylene film
The adsorption equilibrium percentage (formula 1) of polycyclic aromatic hydrocarbon in adsorbent material, it is polycyclic in polyethylene film adsorbent material after amendment sampling
The adsorption concentration of aromatic hydrocarbons obtains the adsorption equilibrium of polycyclic aromatic hydrocarbon in unit mass polyethylene film adsorbent material in soil and air
Concentration (formula 2).
Wherein, equ%: the adsorption equilibrium percentage of polycyclic aromatic hydrocarbon；
C0、Ct: the residual concentration of the initial concentration of PRCs and t moment in polyethylene film adsorbent material.
Wherein, CPE-air(soil): when reaching equilibrium state, polyethylene film adsorbent material is adsorbed in air (or in soil)
The concentration of polycyclic aromatic hydrocarbon；
CPE,t: the concentration of polyethylene film adsorbent material absorbing multiring aromatic hydrocarbon in t moment, air (or in soil).
For step (4) when judging migratory direction of the polycyclic aromatic hydrocarbon in rustic exchange process, detection obtains soil and air
Middle polycyclic aromatic hydrocarbon adsorption equilibrium concentration proportion (CPE-soil/CPE-air) it is greater than 1.25, polycyclic aromatic hydrocarbon is migrated from soil into air；
Detection obtains soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air) less than 0.8, polycyclic aromatic hydrocarbon from
Air is to soil mobility；Detection obtains soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air)
0.8-1.25, polycyclic aromatic hydrocarbon reach dynamic exchange balance in rustic exchange process.
For more specifically, soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air) be
1.25-2.1 and do not include 1.25, polycyclic aromatic hydrocarbon is migrated from soil into air；Soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium
Concentration proportion (CPE-soil/CPE-air) it is 0.5-0.8 and do not include 0.8, polycyclic aromatic hydrocarbon is from air to soil mobility.
Compared with prior art, the invention has the following advantages that
1, the present invention adsorbs soil and Polycyclic Aromatic Hydrocarbons In Alr, simple to operate, no city using polyethylene film in situ
The sampling limitation that city's power supply and noise disturb residents, samples low in cost, can lay monitoring point in a wide range of, practical；
2, this invention removes rustic distribution coefficient (Ksoil-air) bring uncertainties, improve polycyclic aromatic hydrocarbon soil
The accuracy that gas source remittance is known.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
A kind of rustic source remittance recognition methods of polycyclic aromatic hydrocarbon, process flow are inhaled in situ as shown in Figure 1, passing through polyethylene film
Attached soil and Polycyclic Aromatic Hydrocarbons In Alr, when polyethylene film reaches adsorption equilibrium, the polyethylene film in soil and air
Polycyclic aromatic hydrocarbon adsorption equilibrium concentration difference reflects the source remittance pattern of rustic exchange process polycyclic aromatic hydrocarbon, using following steps:
(1) preparation of the polyethylene film adsorbent material containing marker
By 1.0-3.0mg '-dibromobiphenyl, tetra- bromo biphenyl of 0.2-1.2mg, five bromo biphenyl of 0.1-0.6mg, 0.25-2.5mg eight
The deuterated pyrene of chloronaphthalene, 0.25-2.5mg, is dissolved in 1.0-3.2L methanol, adds 0.8-3L water, is configured to PRCs solution.
30-80 μm of polyethylene film material of thickness is cut into 20-40cm (length) and 5-10cm (width), weight is about
1.0~5.0g.It successively uses water, acetone, methylene chloride and n-hexane to impregnate 20-40h the polyethylene film cut, then uses
PRCs solution impregnates 20-60 days, is put into metal sample bag and is sealed after taking-up, completes the polyethylene film containing marker
The preparation of adsorbent material.
(2) in situ sampling of polyethylene film adsorbent material and pretreatment in soil and air
The in situ sampling of polyethylene film adsorbent material in soil: the polyethylene film adsorbent material containing marker is hung down
Straight to place in topsoil, depth 5-15cm, polyethylene film absorption PAHs in soil carries out original position soil sample and adopts
Collection, after absorption 10-60 days, taking-up polyethylene film, which is put back in metal sample bag, to be saved.
The in situ sampling of polyethylene film adsorbent material in air: by the polyethylene film adsorbent material containing marker,
The polyethylene film adsorbent material containing marker is fixed in inverted stainless steel bowl with stainless steel wire, stainless steel bowl is hanged
It hangs at 50-200cm from the ground, is contacted with air, absorption Polycyclic Aromatic Hydrocarbons In Alr carries out air sample acquisition in situ, absorption
After 10-60 days, taking-up polyethylene film, which is put back in metal sample bag, to be saved.
Pretreatment: the polyethylene film adsorbent material after sampling is washed with water, and removal is attached to the particulate matter etc. on surface
Impurity, be added the deuterated polycyclic aromatic hydrocarbon of 100ng to polyethylene film adsorbent material surface, successively using 30-60mL methylene chloride with
30-60mL n-hexane impregnates polyethylene film adsorbent material 16-48h after sampling.Methylene chloride soak and n-hexane are impregnated
Liquid mixing, solvent switch are concentrated into 1mL at n-hexane, are eventually adding the deuterated fluorenes of 100ng, complete sample pretreatment.
(3) soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration calculation
Using polycyclic aromatic hydrocarbon concentration and PRCs concentration of component in sample after gas-chromatography and mass spectrometer measurement pretreatment,
According to after sampling in polyethylene film adsorbent material PRCs component residual concentration, calculate sampling after polyethylene film adsorbent material
The adsorption equilibrium percentage (formula 1) of middle polycyclic aromatic hydrocarbon corrects the suction of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling
Attached concentration, the adsorption equilibrium concentration for obtaining polycyclic aromatic hydrocarbon in unit mass polyethylene film adsorbent material in soil and air are (public
Formula 2).
Wherein, equ%: the adsorption equilibrium percentage of polycyclic aromatic hydrocarbon；
C0、Ct: the residual concentration of the initial concentration of PRCs and t moment in polyethylene film adsorbent material.
Wherein, CPE-air(soil): when reaching equilibrium state, polyethylene film adsorbent material is adsorbed in air (or in soil)
The concentration of polycyclic aromatic hydrocarbon；
CPE,t: the concentration of polyethylene film adsorbent material absorbing multiring aromatic hydrocarbon in t moment, air (or in soil)；
(4) polycyclic aromatic hydrocarbon migratory direction judges in rustic exchange process
According in soil and air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration, meter
Calculate soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air), judge polycyclic aromatic hydrocarbon rustic exchanged
Migratory direction in journey.When soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air) it is greater than 1.25-
2.1, for polycyclic aromatic hydrocarbon from soil to air evaporation, soil is source, and air is to converge；When soil and Polycyclic Aromatic Hydrocarbons In Alr absorption are flat
Weigh concentration proportion (CPE-soil/CPE-air) be less than 0.5-0.8 when, for polycyclic aromatic hydrocarbon from air to soil settlement, air is source, soil
It is to converge；When soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air) fall between, polycyclic virtue
Hydrocarbon reaches approximately dynamic exchange balance in rustic exchange process.
It is more specifical embodiment below.
Embodiment 1
Polycyclic aromatic hydrocarbon rustic source in Shanghai Urban residential quarter is converged with the present invention and is identified；
By 3.0mg '-dibromobiphenyl, tetra- bromo biphenyl of 1.2mg, five bromo biphenyl of 0.6mg, 2.5mg Octachloronaphthalene, the deuterated pyrene of 2.5mg,
It is dissolved in 3.2L methanol, adds 0.8L water, be configured to PRCs solution.30 μm of polyethylene film materials of thickness are cut into
20cm (length) and 5cm (width), weight are about 1.0g.The polyethylene film cut is successively used into water, acetone, dichloromethane
Alkane and n-hexane impregnate 20 hours, then are impregnated 20 days with PRCs solution, are put into metal sample bag and are sealed after taking-up, complete
The preparation of polyethylene film adsorbent material containing marker.
Polyethylene film adsorbent material containing marker is disposed vertically in topsoil, depth 10cm, polyethylene
Film adsorbs PAHs in soil and carries out the acquisition of original position soil sample, after absorption 15 days, takes out polyethylene film and puts back to metal
It is saved in sample sack.The polyethylene film adsorbent material containing marker is fixed on inverted stainless steel bowl with stainless steel wire
In, stainless steel bowl is suspended at 50cm from the ground in air, is contacted with air, absorption Polycyclic Aromatic Hydrocarbons In Alr carries out in situ empty
The acquisition of gas sample product, after absorption 15 days, taking-up polyethylene film, which is put back in metal sample bag, to be saved.By the polyethylene film after sampling
Adsorbent material washes with water, and removal is attached to the impurity such as the particulate matter on surface, and it is thin to polyethylene that the deuterated polycyclic aromatic hydrocarbon of 100ng is added
Polyethylene film adsorbent material after sampling successively is impregnated on film adsorbent material surface using 30mL methylene chloride and 30mL n-hexane
16h.Methylene chloride soak and n-hexane soak are mixed, solvent switch is concentrated into 1mL at n-hexane, is eventually adding
The deuterated fluorenes of 100ng completes sample pretreatment.
Using polycyclic aromatic hydrocarbon concentration and PRCs concentration of component in sample after gas-chromatography and mass spectrometer measurement pretreatment,
According to after sampling in polyethylene film adsorbent material PRCs component residual concentration, calculate sampling after polyethylene film adsorbent material
The adsorption equilibrium percentage of middle polycyclic aromatic hydrocarbon corrects the adsorption concentration of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling,
Obtain the adsorption equilibrium concentration of polycyclic aromatic hydrocarbon in unit mass polyethylene film adsorbent material in soil and air.
According in soil and air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration, meter
Calculate soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air, it is shown in Table 1), judges polycyclic aromatic hydrocarbon rustic
Migratory direction in exchange process identifies rustic source remittance pattern.
1. Shanghai Urban residential quarter soil of table and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion and rustic source, which are converged, knows
Not
| Serial number | Chinese | Compound | CPE-Soil/CPE-Air | Migratory direction | Source | It converges |
| 1 | Fluorenes | Fluorene | 0.24 | Sedimentation | Gas | Soil |
| 2 | It is luxuriant and rich with fragrance | Phenanthrene | 0.04 | Sedimentation | Gas | Soil |
| 3 | Anthracene | Anthracene | 0.14 | Sedimentation | Gas | Soil |
| 4 | Fluoranthene | Fluoranthene | 0.32 | Sedimentation | Gas | Soil |
| 5 | Pyrene | Pyrene | 0.45 | Sedimentation | Gas | Soil |
| 6 | Benzo [a] anthracene | Benz[a]anthracene | 3.85 | Evaporation | Soil | Gas |
| 7 | It bends | Chrysene | 2.67 | Evaporation | Soil | Gas |
| 8 | Benzo [b] fluoranthene | Benzo[b]fluoranthene | 7.24 | Evaporation | Soil | Gas |
| 9 | Benzo [k] fluoranthene | Benzo[k]fluoranthene | 4.49 | Evaporation | Soil | Gas |
| 10 | Benzo [a] pyrene | Benzo[a]pyrene | 6.33 | Evaporation | Soil | Gas |
| 11 | Indeno [1,2,3-cd] pyrene | Indeno[1,2,3-cd]pyrene | 8.97 | Evaporation | Soil | Gas |
| 12 | Dibenzo [a, h] anthracene | Dibenz[a,h]anthracene | 4.01 | Evaporation | Soil | Gas |
| 13 | Benzo [g, h, i] pyrene | Benzo[ghi]pyrene | 7.03 | Evaporation | Soil | Gas |
Embodiment 2
The rustic source of polycyclic aromatic hydrocarbon in the Changxing Island farmland of Shanghai is converged with the present invention and is identified；
1.0mg '-dibromobiphenyl, tetra- bromo biphenyl of 0.2mg, five bromo biphenyl of 0.1mg, 0.25mg Octachloronaphthalene, 0.25mg is deuterated
Pyrene is dissolved in 1.0L methanol, adds 3L water, is configured to PRCs solution.80 μm of polyethylene film materials of thickness are cut into
40cm (length) and 10cm (width), weight are about 3.0g.The polyethylene film cut is successively used into water, acetone, dichloro
Methane and n-hexane impregnate 40 hours, then are impregnated 60 days with PRCs solution, are put into metal sample bag and are sealed after taking-up, complete
At the preparation of the polyethylene film adsorbent material containing marker.
Polyethylene film adsorbent material containing marker is disposed vertically in topsoil, depth 15cm, polyethylene
Film adsorbs PAHs in soil and carries out the acquisition of original position soil sample, after absorption 60 days, takes out polyethylene film and puts back to metal
It is saved in sample sack.The polyethylene film adsorbent material containing marker is fixed on inverted stainless steel bowl with stainless steel wire
In, stainless steel bowl is suspended at 200cm from the ground in air, is contacted with air, absorption Polycyclic Aromatic Hydrocarbons In Alr carries out in situ
Air sample acquisition, after absorption 60 days, taking-up polyethylene film, which is put back in metal sample bag, to be saved.Polyethylene after sampling is thin
Film adsorbent material washes with water, and removal is attached to the impurity such as the particulate matter on surface, and the deuterated polycyclic aromatic hydrocarbon of 100ng is added to polyethylene
Polyethylene film adsorbent material after sampling successively is impregnated on film adsorbent material surface using 60mL methylene chloride and 60mL n-hexane
48h.Methylene chloride soak and n-hexane soak are mixed, solvent switch is concentrated into 1mL at n-hexane, is eventually adding
The deuterated fluorenes of 100ng completes sample pretreatment.
Using polycyclic aromatic hydrocarbon concentration and PRCs concentration of component in sample after gas-chromatography and mass spectrometer measurement pretreatment,
According to after sampling in polyethylene film adsorbent material PRCs component residual concentration, calculate sampling after polyethylene film adsorbent material
The adsorption equilibrium percentage of middle polycyclic aromatic hydrocarbon corrects the adsorption concentration of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling,
Obtain the adsorption equilibrium concentration of polycyclic aromatic hydrocarbon in unit mass polyethylene film adsorbent material in soil and air.
According in soil and air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration, meter
Calculate soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air, it is shown in Table 2), judges polycyclic aromatic hydrocarbon rustic
Migratory direction in exchange process identifies rustic source remittance pattern.
2. Shanghai City Changxing Island farm environment soil of table and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion and rustic source
It converges and identifies
Embodiment 3
The rustic source of Entry Points for Ocean Shipping/Ocean Cargo air pollution source region Polycyclic Aromatic Hydrocarbonat Existing in Environment is converged with the present invention and is identified；
1.0mg '-dibromobiphenyl, tetra- bromo biphenyl of 0.2mg, five bromo biphenyl of 0.1mg, 0.25mg Octachloronaphthalene, 0.25mg is deuterated
Pyrene is dissolved in 1.0L methanol, adds 3L water, is configured to PRCs solution.50 μm of polyethylene film materials of thickness are cut into
20cm (length) and 5cm (width), weight are about 2.0g.The polyethylene film cut is successively used into water, acetone, dichloromethane
Alkane and n-hexane impregnate 20 hours, then are impregnated 30 days with PRCs solution, are put into metal sample bag and are sealed after taking-up, complete
The preparation of polyethylene film adsorbent material containing marker.
Polyethylene film adsorbent material containing marker is disposed vertically in topsoil, depth 10cm, polyethylene
Film adsorbs PAHs in soil and carries out the acquisition of original position soil sample, after absorption 45 days, takes out polyethylene film and puts back to metal
It is saved in sample sack.The polyethylene film adsorbent material containing marker is fixed on inverted stainless steel bowl with stainless steel wire
In, stainless steel bowl is suspended at 100cm from the ground in air, is contacted with air, absorption Polycyclic Aromatic Hydrocarbons In Alr carries out in situ
Air sample acquisition, after absorption 45 days, taking-up polyethylene film, which is put back in metal sample bag, to be saved.Polyethylene after sampling is thin
Film adsorbent material washes with water, and removal is attached to the impurity such as the particulate matter on surface, and the deuterated polycyclic aromatic hydrocarbon of 100ng is added to polyethylene
Polyethylene film adsorbent material after sampling successively is impregnated on film adsorbent material surface using 40mL methylene chloride and 40mL n-hexane
36h.Methylene chloride soak and n-hexane soak are mixed, solvent switch is concentrated into 1mL at n-hexane, is eventually adding
The deuterated fluorenes of 100ng completes sample pretreatment.
Using polycyclic aromatic hydrocarbon concentration and PRCs concentration of component in sample after gas-chromatography and mass spectrometer measurement pretreatment,
According to after sampling in polyethylene film adsorbent material PRCs component residual concentration, calculate sampling after polyethylene film adsorbent material
The adsorption equilibrium percentage of middle polycyclic aromatic hydrocarbon corrects the adsorption concentration of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling,
Obtain the adsorption equilibrium concentration of polycyclic aromatic hydrocarbon in unit mass polyethylene film adsorbent material in soil and air.
According in soil and air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration, meter
Calculate soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air, it is shown in Table 3), judges polycyclic aromatic hydrocarbon rustic
Migratory direction in exchange process identifies rustic source remittance pattern.
3. harbour air pollution source region ambient soil of table and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion and rustic source
It converges and identifies
| Serial number | Chinese | Compound | CPE-Soil/CPE-Air | Migratory direction | Source | It converges |
| 1 | Fluorenes | Fluorene | 0.0001 | Sedimentation | Gas | Soil |
| 2 | It is luxuriant and rich with fragrance | Phenanthrene | 0.130 | Sedimentation | Gas | Soil |
| 3 | Anthracene | Anthracene | 0.021 | Sedimentation | Gas | Soil |
| 4 | Fluoranthene | Fluoranthene | 0.188 | Sedimentation | Gas | Soil |
| 5 | Pyrene | Pyrene | 0.214 | Sedimentation | Gas | Soil |
| 6 | Benzo [a] anthracene | Benz[a]anthracene | 0.063 | Sedimentation | Gas | Soil |
| 7 | It bends | Chrysene | 0.229 | Sedimentation | Gas | Soil |
| 8 | Benzo [b] fluoranthene | Benzo[b]fluoranthene | 0.145 | Sedimentation | Gas | Soil |
| 9 | Benzo [k] fluoranthene | Benzo[k]fluoranthene | 0.111 | Sedimentation | Gas | Soil |
| 10 | Benzo [a] pyrene | Benzo[a]pyrene | 0.010 | Sedimentation | Gas | Soil |
| 11 | Indeno [1,2,3-cd] pyrene | Indeno[1,2,3-cd]pyrene | 0.010 | Sedimentation | Gas | Soil |
| 12 | Dibenzo [a, h] anthracene | Dibenz[a,h]anthracene | 0.002 | Sedimentation | Gas | Soil |
| 13 | Benzo [g, h, i] pyrene | Benzo[ghi]pyrene | 0.005 | Sedimentation | Gas | Soil |
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (8)
1. converge recognition methods in a kind of rustic source of polycyclic aromatic hydrocarbon, which is characterized in that this method uses following steps:
(1) preparation of the polyethylene film adsorbent material containing marker
'-dibromobiphenyl, four bromo biphenyls, five bromo biphenyls, Octachloronaphthalene, deuterated pyrene are dissolved in methanol aqueous solution, it is molten to be configured to PRCs
Liquid；
It successively uses water, acetone, methylene chloride and n-hexane to impregnate 20-40 hours the polyethylene film cut, then uses PRCs
Solution impregnates 20-60 days, is sealed after taking-up, the polyethylene film adsorbent material containing marker is prepared；
(2) in situ sampling of polyethylene film adsorbent material and pretreatment in soil and air
The in situ sampling of polyethylene film adsorbent material in soil: the polyethylene film adsorbent material containing marker is vertically put
It sets in topsoil, polyethylene film adsorbs PAHs in soil and carries out the acquisition of original position soil sample, after absorption 10-60 days
It takes out and saves；
The in situ sampling of polyethylene film adsorbent material in air: the polyethylene film adsorbent material containing marker is vacantly set
In air, absorption Polycyclic Aromatic Hydrocarbons In Alr carries out air sample acquisition in situ, and absorption fetched preservation after 10-60 days；
Pretreatment: the polyethylene film adsorbent material after sampling is washed with water, and removes surface impurity, deuterated polycyclic aromatic hydrocarbon is added
To polyethylene film adsorbent material surface, polyethylene film adsorbent material after sampling successively is impregnated using methylene chloride and n-hexane
Then 16-48h mixes methylene chloride soak and n-hexane soak, solvent is replaced as n-hexane and is concentrated, and adds deuterium
For fluorenes, sample pretreatment is completed；
(3) soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration calculation
Polycyclic aromatic hydrocarbon concentration and PRCs concentration of component in polyethylene film adsorbent material after measurement pretreatment, according to second poly- after sampling
The residual concentration of PRCs component in alkene film adsorbent material calculates the suction of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling
Attached balance percentage corrects the adsorption concentration of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling, obtains soil and air
The adsorption equilibrium concentration of polycyclic aromatic hydrocarbon in middle unit mass polyethylene film adsorbent material；
(4) polycyclic aromatic hydrocarbon migratory direction judges in rustic exchange process
According in soil and air in unit mass polyethylene film adsorbent material polycyclic aromatic hydrocarbon adsorption equilibrium concentration, calculate soil
Earth and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air), judge polycyclic aromatic hydrocarbon in rustic exchange process
Migratory direction, wherein CPE-soilFor PAHs in soil adsorption equilibrium concentration, CPE-airIt is flat for Polycyclic Aromatic Hydrocarbons In Alr absorption
Weigh concentration.
2. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 1, which is characterized in that institute in step (1)
State '-dibromobiphenyl, four bromo biphenyls, five bromo biphenyls, Octachloronaphthalene, deuterated pyrene, first alcohol and water mass ratio be 1.0-3.0:0.2-1.2:
0.1-0.6:0.25-2.5:0.25-2.5:1.0-3.2×106:0.8-3.0×106。
3. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 1, which is characterized in that add in step (2)
The mass ratio of the deuterated polycyclic aromatic hydrocarbon and deuterated fluorenes that enter is 1:1.
4. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 1, which is characterized in that add in step (2)
The mass ratio of the deuterated polycyclic aromatic hydrocarbon and '-dibromobiphenyl that enter is 1 × 10-4:1.0-3.0。
5. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 1, which is characterized in that step is adopted in (3)
With polycyclic aromatic hydrocarbon concentration and PRCs component in polyethylene film adsorbent material after gas-chromatography and mass spectrometer measurement pretreatment
Concentration.
6. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 1, which is characterized in that root in step (3)
According to after sampling in polyethylene film adsorbent material PRCs component residual concentration, calculate after sampling in polyethylene film adsorbent material
The adsorption equilibrium percentage (formula 1) of polycyclic aromatic hydrocarbon corrects the absorption of polycyclic aromatic hydrocarbon in polyethylene film adsorbent material after sampling
Concentration obtains the adsorption equilibrium concentration (formula of polycyclic aromatic hydrocarbon in unit mass polyethylene film adsorbent material in soil and air
2),
Equ%: the adsorption equilibrium percentage of polycyclic aromatic hydrocarbon；
C0、Ct: the residual concentration of the initial concentration of PRCs and t moment in polyethylene film adsorbent material,
CPE-air(soil): when reaching equilibrium state, polyethylene film adsorbent material absorbing multiring aromatic hydrocarbon is dense in air or soil
Degree；
CPE,t: in t moment, the concentration of polyethylene film adsorbent material absorbing multiring aromatic hydrocarbon in air or soil.
7. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 1, which is characterized in that step (4) is being sentenced
When migratory direction of the disconnected polycyclic aromatic hydrocarbon in rustic exchange process, detection obtains soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium is dense
Spend ratio (CPE-soil/CPE-air) it is greater than 1.25, polycyclic aromatic hydrocarbon is migrated from soil into air；Detection obtains in soil and air
Polycyclic aromatic hydrocarbon adsorption equilibrium concentration proportion (CPE-soil/CPE-air) less than 0.8, polycyclic aromatic hydrocarbon is from air to soil mobility；It detects
To soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air) in 0.8-1.25, polycyclic aromatic hydrocarbon is rustic
Reach dynamic exchange balance in exchange process.
8. converge recognition methods in the rustic source of a kind of polycyclic aromatic hydrocarbon according to claim 7, which is characterized in that in soil and air
Polycyclic aromatic hydrocarbon adsorption equilibrium concentration proportion (CPE-soil/CPE-air) be 1.25-2.1 and do not include 1.25, polycyclic aromatic hydrocarbon from soil to
It is migrated in air；Soil and Polycyclic Aromatic Hydrocarbons In Alr adsorption equilibrium concentration proportion (CPE-soil/CPE-air) be 0.5-0.8 and do not wrap
Include 0.8, polycyclic aromatic hydrocarbon is from air to soil mobility.
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