CN114019074A - Quantification method for VOCs composition and emission amount of asphalt pavement construction site - Google Patents

Quantification method for VOCs composition and emission amount of asphalt pavement construction site Download PDF

Info

Publication number
CN114019074A
CN114019074A CN202111248958.9A CN202111248958A CN114019074A CN 114019074 A CN114019074 A CN 114019074A CN 202111248958 A CN202111248958 A CN 202111248958A CN 114019074 A CN114019074 A CN 114019074A
Authority
CN
China
Prior art keywords
vocs
asphalt
construction site
composition
site
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111248958.9A
Other languages
Chinese (zh)
Inventor
吴少鹏
李娜
牛韵雅
江琪
谢君
庞凌
陈美祝
刘全涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN202111248958.9A priority Critical patent/CN114019074A/en
Publication of CN114019074A publication Critical patent/CN114019074A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2294—Sampling soil gases or the like
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
    • G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
    • G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
    • G01N2030/8845—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds involving halogenated organic compounds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
    • G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
    • G01N2030/8854—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds involving hydrocarbons

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Soil Sciences (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a method for quantifying VOCs composition and total emission amount in an asphalt pavement construction site, which comprises the following steps: collecting VOCs samples of a construction site; and analyzing the distribution condition of the main components of the asphalt VOCs by adopting a gas chromatography/mass spectrometry combined technology, and quantitatively analyzing the substance composition of the asphalt VOCs by taking a photochemical reaction active substance as a research object to obtain the composition and the total emission amount of the asphalt VOCs on the asphalt pavement construction site. The method simply and visually presents the discharge distribution characteristics of the VOCs of the asphalt, clarifies the main active species, and solves the difficulties of various VOCs, low content, unclear object and the like; the change trend of the asphalt VOCs substances under different conditions is proved through the change of the content and the proportion of the various substances, the asphalt VOCs emission factor database is filled, different environmental impact effects can be conveniently evaluated according to the characteristics of the various substances of the asphalt VOCs, and targeted prevention and treatment measures are provided.

Description

Quantification method for VOCs composition and emission amount of asphalt pavement construction site
Technical Field
The invention relates to the field of analysis and detection of VOCs (volatile organic compounds), in particular to a method for quantifying the composition and discharge amount of VOCs in an asphalt pavement construction site.
Background
Asphalt material is an organic gelled material composed of organic hydrocarbons and derivatives thereof with complex components, and is widely applied to the fields of waterproof engineering, road paving and the like due to excellent performances of good cohesive force, corrosion resistance, waterproofness and the like. However, due to the high molecular polymer property of the asphalt material, Volatile Organic Compounds (VOCs) are released under the influence of environmental factors such as temperature and illumination in the production and application processes, and thus, the asphalt material has important influence on human bodies and environment.
With the continuous importance of society on air pollution in recent years and the deepened control of air pollution in China, VOCs serving as important precursors of photochemical smog become a new concern in air pollution control in China after particulate matters, sulfur dioxide and nitrogen oxides. The research of China on VOCs starts relatively late, the research is mainly focused on the fields of fuel combustion, automobile exhaust, petrochemical processing, industrial coating and the like at present, the research on VOCs released in the practical application process of the asphalt material is less, and a unified detection means and an evaluation standard are lacked. According to the report of '2020 traffic transportation industry development statistics bulletin', the total road mileage in China reaches 519.81 kilometers by 2019, and meanwhile, the total road maintenance mileage is 514.40 kilometers and accounts for 99.0 percent of the total road mileage. The asphalt pavement is the most widely applied pavement form of the high-grade highway in China at present, and occupies more than 90% of the area of the highway. The main components of the asphalt pavement are stone, asphalt cement, filler and other additives, in order to realize better construction performance, the asphalt mixture is usually prepared and processed under high temperature (above 140 ℃), VOCs are released at different stages of the asphalt pavement construction process and directly enter the ambient atmospheric environment, and the asphalt pavement is a potential VOCs emission source.
Because the structure of the asphalt material is very complex, research on VOCs of asphalt is relatively few at the present stage, and further improvement is still needed. Some researchers build a closed asphalt volatile substance generating device under the laboratory condition or rely on a detection equipment combination device to lead asphalt materials to be heated and cracked quickly, so that asphalt VOCs samples under specific conditions are collected and are led into a gas chromatography/mass spectrometer for qualitative analysis. The results of the study in Autelitano, italy show that bitumen can detect nearly 200 organic species, mainly including straight and branched hydrocarbons, naphthenes, aromatics, polycyclic aromatics and heterocyclic compounds, during heating from 90 ℃ to 250 ℃. However, due to the complex composition of the pitch VOCs and the non-uniform research objects, the calibration objects in the quantitative analysis process are difficult to determine, and the quantitative research of the pitch VOCs is always challenging. Scholars usually select several representative substances as calibrators to describe the general trend of VOCs or perform semi-quantitative studies on pitch VOCs by comparison of chromatographic peak areas. Although detection technologies such as a fluorescence photometer, an ultraviolet-visible spectrophotometer and a thermogravimetry-mass spectrometry are gradually applied to the detection of the VOCs of the asphalt along with the development of the technology, due to the limitations of instruments and test methods, specific components cannot be analyzed, the amount of the used asphalt sample is very small, usually only a few grams or even a few milligrams, the process conditions are deviated from the actual situation of a construction site, so that certain deviation exists between a laboratory representation result and a site discharge result, and the release behavior of the asphalt material at different stages of pavement construction cannot be sufficiently revealed.
Due to the difficulties of unorganized discharge, complex composition, low content and the like of the VOCs in the asphalt pavement, few researches on the discharge behavior of the VOCs in the actual construction process are carried out, no specific standard is made at present to evaluate the volatilization capacity of the VOCs in the actual application process and the influence degree on the environment, target compounds are difficult to unify, and quantitative researches on all components and the total discharge amount are difficult to carry out.
Disclosure of Invention
The invention aims to provide a method for quantifying VOCs composition and discharge amount of an asphalt pavement construction site. The invention provides a method for quantitatively analyzing the material composition of the asphalt VOCs by taking a photochemical reaction active substance as a main research object, covering the main substances of the asphalt VOCs as much as possible, solving the problems of various types, low content, unclear object and the like of the asphalt VOCs, and laying a solid foundation for the subsequent quantitative evaluation of the environmental influence of the asphalt VOCs.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the method for quantifying the composition and discharge amount of VOCs in the asphalt pavement construction site comprises the following steps:
1) selecting key links in the asphalt pavement construction process as sampling points, and automatically collecting asphalt VOCs released on site into a polymer gas sampling bag by using a negative pressure generated by a gas sampling pump to collect samples;
2) analyzing the material composition of the on-site asphalt VOCs by adopting a gas chromatography/mass spectrometry combined technology;
3) according TO the characteristics of photochemical reaction activity and toxic harmfulness of the in-situ asphalt VOCs, PAMS standard gas and a TO-15 substance are selected as target calibration compounds which mainly comprise aliphatic hydrocarbon, aromatic hydrocarbon, oxygenated hydrocarbon and halogenated hydrocarbon, and the distribution and total release amount of each component of the asphalt VOCs are quantitatively analyzed.
According to the scheme, in the step 1), sampling points are asphalt storage tanks, asphalt mixture mixing stations or pavement paving sites; preferably, the temperature of the asphalt storage tank is 150-160 ℃, the temperature of the blanking part of the asphalt mixture mixing station is 170-190 ℃, and the pavement paving site is a paving site with the paving starting temperature not lower than 160 ℃.
According to the scheme, the sampling rate of the gas sampling pump is set to be 100-1000mL/min, the volume of the collected gas is 2-10L, and the discharge condition of the in-situ asphalt VOCs is reduced.
According to the scheme, aiming at the characteristics of the asphalt pavement construction site, a sampling point is selected at a position 0.5-1.0m away from the asphalt VOCs emission source.
According to the scheme, the collected samples pass through a low-temperature preconcentration system, under the condition of extremely low temperature, the pitch VOCs are enriched in an ultra-low-temperature hollow pipe, then the collected samples are subjected to thermal analysis, and after gas chromatography separation, a mass spectrometer is used for analysis and detection, so that the distribution condition of the pitch VOCs substances in the construction site is obtained. Preferably, the very low temperature condition temperature is-150 ℃.
According to the scheme, the aliphatic hydrocarbon compounds in the quantification standard of the VOCs of the asphalt comprise ethane, propane, isobutane, n-butane, cyclopentane, isopentane, n-pentane, 2-dimethylbutane, 2, 3-dimethylbutane, 2-methylpentane, 3-methylpentane, n-hexane, methylcyclopentane, cyclohexane, 2, 4-dimethylpentane, 2-methylhexane, 2, 3-dimethylpentane, 3-methylhexane, 2, 4-trimethylpentane, heptane, methylcyclohexane, 2,3, 4-trimethylpentane, 2-methylheptane, 3-methylheptane, n-octane, n-nonane, decane, undecane, dodecane, ethylene, propylene, trans-2-butene, 1-butene, cis-2-butene, Isobutylene, 1, 3-butadiene, 1-pentene, trans-2-pentene, isoprene, cis-2-pentene, 1-hexene, acetylene and the like.
According to the scheme, the aromatic hydrocarbon compounds in the asphalt VOCs quantitative calibration standard comprise organic matters such as benzene, toluene, ethylbenzene, p/m-xylene, o-xylene, styrene, isopropylbenzene, propylbenzene, 3-ethyltoluene, 4-methyl ethylbenzene, 1,3, 5-trimethylbenzene, 2-ethyltoluene, 1,2, 4-trimethylbenzene, 1, 3-diethylbenzene and 1, 4-diethylbenzene.
According to the scheme, the oxygen-containing hydrocarbon compounds in the asphalt VOCs quantitative calibration object are organic matters such as propionaldehyde, 2-methylacrolein, butyraldehyde, valeraldehyde, n-hexanal, acetone, butenone, 2-butanone, 2-pentanone, 3-pentanone, methyl tert-butyl ether and the like.
According to the scheme, the halogenated hydrocarbon compounds in the VOCs quantification calibration substance of the asphalt comprise Freon 114, chloromethane, chloroethylene, bromomethane, chloroethane, Freon 11, 1, 1-dichloroethylene, Freon 113, iodomethane, acetonitrile, dichloromethane, 1, 1-dichloroethane, cis-1, 2-dichloroethylene, trichloromethane, 1,1, 1-trichloroethane, carbon tetrachloride, 1, 2-dichloroethane, trichloroethylene, 1, 2-dichloropropane, dichlorobromomethane, cis-1, 3-dichloro-1-propene, trans-1, 3-dichloropropene, 1,1, 2-trichloroethane, tetrachloroethylene, 1, 2-dibromoethane, chlorobenzene, bromoform, 1,1,2, 2-tetrachloroethane, 1, 3-dichlorobenzene, ethylene dichloride, bromoform, ethylene dichloride, 1,1,2, 2-tetrachloroethane, 1, 3-dichlorobenzenes, 1, 4-dichlorobenzene, benzyl chloride, o-dichlorobenzene, etc.
The invention has the beneficial effects that:
1. the invention provides a method for quantifying the composition and discharge amount of VOCs (volatile organic compounds) in an asphalt pavement construction site, which overcomes the defects that the amount of the VOCs laboratory research materials of the existing asphalt materials is small (usually 0.01g-0.1g), and the actual engineering conditions are separated; the target compound object of the asphalt VOCs quantification is provided, the discharge distribution characteristics of the asphalt VOCs are simply and visually presented, and the main active species are clear, so that the difficulties of multiple types, low content, unclear object and the like of the asphalt VOCs are solved; the change trend of mutual transformation between the asphalt VOCs substances under different conditions is proved through the change of the content and the proportion of each class of substances, the asphalt VOCs emission factor database is filled, the subsequent evaluation of different environmental impact effects according to the characteristics of each class of substances of the asphalt VOCs is facilitated, and a targeted prevention and treatment measure is provided.
2. The method is suitable for researching the discharge behavior of the VOCs in different links in the construction process of the asphalt pavement, and on the basis, the evaluation work of the influence of each component of the VOCs on the environment is further carried out, so that a solid foundation is laid for providing energy-saving and emission-reduction measures.
Drawings
FIG. 1 is a chromatogram of a sample of VOCs from an asphalt storage tank at an asphalt pavement construction site in example 1 of the present invention.
FIG. 2 is a chromatogram of a VOCs sample at the blanking position of an asphalt mixture mixing station at an asphalt pavement construction site in example 1 of the present invention.
FIG. 3 is a chromatogram of a sample of VOCs at a pavement paved at an asphalt pavement construction site in example 1 of the present invention.
Fig. 4 shows the discharge amount of VOCs at the paving stage of different asphalt pavement structures in the asphalt pavement construction site in embodiment 2 of the present invention.
Detailed Description
The present invention provides a method for quantifying the composition and the discharge amount of VOCs in an asphalt pavement construction site, and for better understanding of the present invention, the contents of the present invention will be further illustrated with reference to the following examples, but the contents of the present invention are not limited to the following examples.
The following specifically describes the method for quantifying the composition and emission of VOCs in the asphalt pavement construction site according to the embodiment of the present application.
The method comprises the steps of collecting VOCs in an asphalt pavement construction site, generating negative pressure through a gas sampling pump, collecting asphalt VOCs gas at site characteristic sampling points into a passivated polymer gas sampling bag, and detecting and analyzing components and the total amount by a gas chromatography/mass spectrometer. The method can fully reduce the VOCs emission condition of the asphalt in different links of the asphalt pavement construction site.
The polymer gas sampling bag is made of a Teflon film, and high-purity N is repeatedly used before use2And (4) flushing.
The sampling rate of the gas sampling pump is set to be 500mL/min, and the volume of VOCs gas collection is 2L.
An asphalt storage tank (150-.
And the field sampling point is selected as a region 0.5m away from the discharge source of the asphalt VOCs.
Subjecting the collected sample to high purity N2After dilution, the mixture is led into a multi-stage cold trap pre-concentration system for trapping, the freezing temperature is set to be-150 ℃, the sample injection flow rate is 60mL/min, and the sample injection time is 5 min.
And (3) rapidly heating the enriched sample to analyze, wherein the analyzing temperature is 120 ℃, and the analyzing time is 4 min.
The collected gas samples were analyzed for composition using a GC7820A/MS5977E gas chromatography/mass spectrometer of agilent, usa.
The gas chromatography conditions of the chromatography/mass spectrometry analyzer are as follows: the temperature raising program is kept for 3min at 35 ℃, and is raised to 180 ℃ at the speed of 6 ℃/min and kept for 5 min; column flow rate: 1.3mL/m, sample injection mode: split-flow sample introduction, split-flow ratio: 5: 1.
the mass spectrum conditions of the chromatogram/mass spectrum analyzer are as follows: the ion source is in electron collision, the electron energy is 70eV, and the temperature of the ion source is 230 ℃; the solvent extension time is 4.7min, and the mass scanning range is as follows: 35-400.
And (3) taking the photochemical reaction active substances as research objects, and quantitatively analyzing the substance composition and the discharge amount of the VOCs of the asphalt.
Analyzing the obtained spectrum by using an NIST software library, comparing with retention time and mass spectrum or characteristic ions of a target compound to be detected to perform qualitative analysis, and performing quantitative analysis by using an internal standard method/external standard method.
The detection method for the composition and the total emission amount of the VOCs in the asphalt pavement construction site can directly reflect the emission conditions of the VOCs in different links of the construction site, and meanwhile, on the basis of overcoming the difficulties that the types of the VOCs in the asphalt are complex, target products are not uniform and the like, according to the definition characteristics of the VOCs, the standard gas with the widest VOCs component coverage area on the market at present is selected as a target compound, so that the component distribution and the total emission amount of the VOCs in the asphalt under different process conditions are measured, a foundation is laid for the subsequent evaluation of the environmental influence of the VOCs in the asphalt, and a more direct reference is provided for the emission reduction and the treatment of the VOCs in the asphalt.
The following will describe the method for detecting the composition and total emission of VOCs in the asphalt pavement construction site in detail with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
By carrying out on-site investigation on a project special for highway maintenance in the Kyoto high-speed Hubei section in Wuhan City, respectively selecting a bitumen storage tank, a discharge position of a bitumen mixture mixing station and a paved road surface as sampling points, and analyzing the distribution and discharge amount of bitumen VOCs in the construction process of the bituminous road surface according to the sample collection, detection and analysis method provided by the invention.
The result shows that VOCs detected on the asphalt pavement construction site mainly comprise ketones, aldehydes, alcohols, acids, aromatic compounds, alkanes, alkenes and cycloalkanes. The aliphatic hydrocarbon substances are most in variety, the proportion is close to 70%, the main component is saturated aliphatic hydrocarbon, and the aliphatic hydrocarbon mainly relates to C5-C8 straight-chain and branched-chain alkane, wherein the n-hexane, the heptane, the 2-methylheptane, the octane, the 2, 3-dimethylpentane and the 3-methylheptane have the highest response. The main component of the unsaturated hydrocarbon is an olefin.
Respectively carrying out quantitative analysis on the material composition and emission of VOCs in key links such as asphalt storage, asphalt mixture blanking and pavement paving in the asphalt pavement construction process, finding that the VOCs in each link have obvious difference along with different process conditions, wherein the concentration of the VOCs in an asphalt storage tank is up to 301mg/m3The concentration of the asphalt mixture feed opening is 6.03mg/m3The lowest concentration of VOCs on the paved road surface is 0.36mg/m3。
Example 2
The method comprises the steps of reconstructing and expanding engineering projects from the toe of a Maotai-covered expressway to the Dongsheng section in the Bitou city through field research, and measuring the components and the content of VOCs released when asphalt surface layers with different grading structures are paved according to the sample collection and quantitative analysis method. According to the structural design of the on-site pavement, VOCs samples in the paving process of three asphalt pavement surface layer structures of AC-16, AC-20 and ATB-30 are collected in an important mode.
The result shows that the total discharge amount of VOCs when the asphalt pavements with different surface layer structures are paved is 433ug/m3-585ug/m3Meanwhile, the distribution conditions of the types of the substances of the asphalt VOCs are consistent, wherein the discharge amount of the aliphatic hydrocarbon substances is the highest, and exceeds 50%, which indicates that the aliphatic hydrocarbon organic substances in the asphalt VOCs are not only the most in quantity, but also the highest in discharge amount. By comparing the content ratio of various substances, the finding shows that in the construction process of different asphalt surface layer structures, the distribution condition of the VOCs of the asphalt shows the reduction of the release amount along with the reduction of the asphalt content due to the different asphalt dosage, and the content of the aromatic hydrocarbon and the hydrocarbon derivative is increased along with the reduction of the content ratio of the aliphatic hydrocarbon. It follows that different processing conditions will have an effect on the composition distribution of the VOCs in the bitumen and therefore must be addressedThe method aims to find out the discharge characteristics of the VOCs of the asphalt under different scenes and carry out follow-up control and prevention according to the types of main active substances. Further screening 10 substances with the highest concentration, and analyzing, the substances only account for less than 10% of the total substances to be detected in quantity, but the total release accounts for more than 50% of the VOCs of the asphalt, which indicates that the VOCs of the asphalt have complex compositions, but the substances belong to trace components and have very low content.
By combining the data in the table 1, the complex components of the asphalt VOCs are classified according to the characteristics of the functional groups, so that the discharge distribution characteristics of the asphalt VOCs are presented more simply and intuitively, and the main active species are clarified; the change trend of the mutual transformation of the asphalt VOCs substances under different conditions is proved through the change of the content and the proportion of each category of substances. The method is beneficial to evaluating different environmental impact effects according to the characteristics of various types of substances of the asphalt VOCs subsequently, and a targeted treatment measure can be provided on the basis.
TABLE 1 VOCs component distribution in different asphalt surface layer structure paving stages in asphalt pavement construction site in example 2
Figure BDA0003322048630000061
According to the results, the method for quantifying the composition and the discharge amount of the VOCs in the asphalt pavement construction site can overcome the difficulties that the VOCs in the use process are discharged in an unorganized mode and target compounds are not uniform, the acquisition and analysis steps are simple, and a reasonable quantification calibration object is provided aiming at the characteristics of low content, multiple types and complex components of the VOCs in the asphalt, so that the main components of the VOCs in the asphalt are covered as far as possible, and even trace compounds can be successfully identified; the defects that related researches of asphalt VOCs at the present stage are mainly based on specific conditions of instruments and equipment and characteristics of asphalt materials, few asphalt samples are frequently used in the experimental process, and the discharge of VOCs related to asphalt mixtures is not reported, are made up, and the composition distribution and the discharge conditions of the asphalt VOCs under different conditions in the actual construction process can be truly and comprehensively reflected. Meanwhile, a solid foundation is laid for further formulating the control strategy of the VOCs in the asphalt.

Claims (7)

1. A quantification method for VOCs composition and emission in an asphalt pavement construction site is characterized by comprising the following steps:
1) selecting key links in the asphalt pavement construction process as sampling points, and automatically collecting asphalt VOCs released on site into a polymer gas sampling bag by using a negative pressure generated by a gas sampling pump to collect samples;
2) analyzing the material composition of the on-site asphalt VOCs by adopting a gas chromatography/mass spectrometry combined technology;
3) according TO the characteristics of photochemical reaction activity and toxic harmfulness of the in-situ asphalt VOCs, PAMS standard gas and a TO-15 substance are selected as target calibration compounds which mainly comprise aliphatic hydrocarbon, aromatic hydrocarbon, oxygenated hydrocarbon and halogenated hydrocarbon, and the distribution and total release amount of each component of the asphalt VOCs are quantitatively analyzed.
2. The quantification method according to claim 1, wherein the sampling point in the step 1) is an asphalt storage tank, an asphalt mixing station blanking point or a pavement paving site.
3. The quantification method as claimed in claim 2, wherein the temperature of the asphalt storage tank is 150-160 ℃, the temperature of the discharging position of the asphalt mixing station is 170-190 ℃, and the pavement paving site is a paving site with the paving starting temperature not lower than 160 ℃.
4. The quantification method according to claim 1, wherein the sampling rate of the gas sampling pump is set to 100 and 1000mL/min, and the volume of the collected gas is 2-10L.
5. The quantification method of claim 1, wherein the sampling points are selected to be 0.5-1.0m from the emission source of the pitch VOCs.
6. The quantification method according to claim 1, wherein the collected samples pass through a low-temperature preconcentration system, under an extremely low temperature condition, the pitch VOCs are enriched in an ultra-low temperature hollow tube, then the collected samples are subjected to thermal analysis, and after gas chromatography separation, a mass spectrometer is used for analysis and detection, so that the distribution condition of the composition of the pitch VOCs in the construction site is obtained.
7. The quantization method according to claim 1, wherein in step 3):
the aliphatic hydrocarbon compound includes ethane, propane, isobutane, n-butane, cyclopentane, isopentane, n-pentane, 2-dimethylbutane, 2, 3-dimethylbutane, 2-methylpentane, 3-methylpentane, n-hexane, methylcyclopentane, cyclohexane, 2, 4-dimethylpentane, 2-methylhexane, 2, 3-dimethylpentane, 3-methylhexane, 2, 4-trimethylpentane, heptane, methylcyclohexane, 2,3, 4-trimethylpentane, 2-methylheptane, 3-methylheptane, n-octane, n-nonane, decane, undecane, dodecane, ethylene, propylene, trans-2-butene, 1-butene, cis-2-butene, isobutene, 1, 3-butadiene, 1-pentene, Trans-2-pentene, isoprene, cis-2-pentene, 1-hexene and acetylene;
the aromatic hydrocarbon compounds comprise benzene, toluene, ethylbenzene, p/m-xylene, o-xylene, styrene, isopropylbenzene, propylbenzene, 3-ethyltoluene, 4-methylethylbenzene, 1,3, 5-trimethylbenzene, 2-ethyltoluene, 1,2, 4-trimethylbenzene, 1, 3-diethylbenzene and 1, 4-diethylbenzene;
the oxygen-containing hydrocarbon compound is propionaldehyde, 2-methylacrolein, butyraldehyde, valeraldehyde, n-hexanal, acetone, butenone, 2-butanone, 2-pentanone, 3-pentanone and methyl tert-butyl ether;
the halogenated hydrocarbon compound comprises Freon 114, chloromethane, chloroethylene, bromomethane, chloroethane, Freon 11, 1, 1-dichloroethylene, Freon 113, iodomethane, acetonitrile, dichloromethane, 1, 1-dichloroethane, cis-1, 2-dichloroethylene, trichloromethane, 1,1, 1-trichloroethane, carbon tetrachloride, 1, 2-dichloroethane, trichloroethylene, 1, 2-dichloropropane, dichlorobromomethane, cis-1, 3-dichloro-1-propene, trans-1, 3-dichloropropene, 1,1, 2-trichloroethane, tetrachloroethylene, 1, 2-dibromoethane, chlorobenzene, bromoform, 1,1,2, 2-tetrachloroethane, 1, 3-dichlorobenzene, 1, 4-dichlorobenzene, benzyl chloride, O-dichlorobenzene.
CN202111248958.9A 2021-10-26 2021-10-26 Quantification method for VOCs composition and emission amount of asphalt pavement construction site Pending CN114019074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111248958.9A CN114019074A (en) 2021-10-26 2021-10-26 Quantification method for VOCs composition and emission amount of asphalt pavement construction site

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111248958.9A CN114019074A (en) 2021-10-26 2021-10-26 Quantification method for VOCs composition and emission amount of asphalt pavement construction site

Publications (1)

Publication Number Publication Date
CN114019074A true CN114019074A (en) 2022-02-08

Family

ID=80057668

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111248958.9A Pending CN114019074A (en) 2021-10-26 2021-10-26 Quantification method for VOCs composition and emission amount of asphalt pavement construction site

Country Status (1)

Country Link
CN (1) CN114019074A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116720652A (en) * 2023-05-25 2023-09-08 邯郸市交通运输局干线公路建设管理中心 Estimation method for VOCs emission in asphalt pavement construction period

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060059308A (en) * 2004-11-27 2006-06-01 한국과학기술연구원 Method for determination of volatile organic compounds in sample by gc/ms with spme
CN103900926A (en) * 2014-03-05 2014-07-02 武汉理工大学 Detection analysis method for asphalt volatile organic compound
CN106645510A (en) * 2016-11-16 2017-05-10 中国科学院山西煤炭化学研究所 Method and device for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction
CN109614575A (en) * 2018-11-30 2019-04-12 中国电建集团贵阳勘测设计研究院有限公司 Method for measuring and calculating CO self-discharged by asphalt mixture on construction site2Is calculated by
CN111487358A (en) * 2020-05-26 2020-08-04 中国科学院城市环境研究所 Full-component automatic analysis system and method for atmospheric volatile organic compounds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060059308A (en) * 2004-11-27 2006-06-01 한국과학기술연구원 Method for determination of volatile organic compounds in sample by gc/ms with spme
CN103900926A (en) * 2014-03-05 2014-07-02 武汉理工大学 Detection analysis method for asphalt volatile organic compound
CN106645510A (en) * 2016-11-16 2017-05-10 中国科学院山西煤炭化学研究所 Method and device for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction
CN109614575A (en) * 2018-11-30 2019-04-12 中国电建集团贵阳勘测设计研究院有限公司 Method for measuring and calculating CO self-discharged by asphalt mixture on construction site2Is calculated by
CN111487358A (en) * 2020-05-26 2020-08-04 中国科学院城市环境研究所 Full-component automatic analysis system and method for atmospheric volatile organic compounds

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
NA LI: "Comparative Assessment of Asphalt Volatile Organic Compounds Emission from field to laboratory", 《JOURNAL OF CLEANER PRODUCTION》, 4 August 2020 (2020-08-04), pages 1 - 10 *
唐新端;冉德钦;任广军;李轶然;刘飞;刘方韬;: "基于隧道沥青路面温拌现场摊铺释放挥发性有机物（VOCs)GC-MS分析研究", 当代化工, no. 07, 28 July 2020 (2020-07-28) *
韩丽: "沥青铺路挥发性有机物排放特征研究", 《四川环境》, 31 August 2020 (2020-08-31), pages 32 - 42 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116720652A (en) * 2023-05-25 2023-09-08 邯郸市交通运输局干线公路建设管理中心 Estimation method for VOCs emission in asphalt pavement construction period
CN116720652B (en) * 2023-05-25 2024-05-24 邯郸市交通运输局干线公路建设管理中心 Estimation method for VOCs emission in asphalt pavement construction period

Similar Documents

Publication Publication Date Title
Picó et al. Pyrolysis gas chromatography-mass spectrometry in environmental analysis: Focus on organic matter and microplastics
Hsieh et al. VOC concentration characteristics in Southern Taiwan
Gueneron et al. PTR-MS fragmentation patterns of gasoline hydrocarbons
Sanders et al. Capillary gas chromatographic method for determining the C3-C12 hydrocarbons in full-range motor gasolines
Zielinska et al. Volatile organic compounds up to C20 emitted from motor vehicles; measurement methods
Caplain et al. Emissions of unregulated pollutants from European gasoline and diesel passenger cars
Wang et al. Variation of ambient non-methane hydrocarbons in Beijing city in summer 2008
Xie et al. The use of positive matrix factorization with conditional probability functions in air quality studies: an application to hydrocarbon emissions in Houston, Texas
Liu et al. Source apportionment of ambient volatile organic compounds in the Pearl River Delta, China: Part II
Yakovenko et al. Emerging use thermo-analytical method coupled with mass spectrometry for the quantification of micro (nano) plastics in environmental samples
Wang et al. Characterization of ozone precursors in the Pearl River Delta by time series observation of non-methane hydrocarbons
Zhang et al. Characteristics, source apportionment and chemical conversions of VOCs based on a comprehensive summer observation experiment in Beijing
Erickson et al. Measuring long chain alkanes in diesel engine exhaust by thermal desorption PTR-MS
Zhao et al. Accurate analysis of polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs homologs in crude oil for improving the gas chromatography/mass spectrometry performance
CN114019074A (en) Quantification method for VOCs composition and emission amount of asphalt pavement construction site
Salameh et al. Speciation of non-methane hydrocarbons (NMHCs) from anthropogenic sources in Beirut, Lebanon
CN114038511A (en) Method for screening VOCs (volatile organic compounds) optimal control pollutants of asphalt and application of method
Liu et al. Comprehensive understanding the emission characteristics and kinetics of VOCs from automotive waste paint sludge in a environmental test chamber
Heikkilä et al. Occupational exposure to bitumen during road paving
Gregoris et al. Microplastics analysis: can we carry out a polymeric characterisation of atmospheric aerosol using direct inlet Py-GC/MS?
Tang et al. Chemical characterization of oil-based asphalt release agents and their emissions
Liu et al. Assessment of carbon monoxide (CO) adjusted non-methane hydrocarbon (NMHC) emissions of a motor fleet–A long tunnel study
CN114935618A (en) Odor causing substance accurate identification method based on non-target screening
Nardella et al. Analytical pyrolysis and thermal analysis to chemically characterise bitumen from Italian geological deposits and Neolithic stone tools
Chang et al. Validation of in-situ measurements of volatile organic compounds through flask sampling and gas chromatography/mass spectrometry analysis

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination