CN110208074A - A kind of Volatile Organic Compounds in Soil device for fast detecting and its detection method - Google Patents
A kind of Volatile Organic Compounds in Soil device for fast detecting and its detection method Download PDFInfo
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- CN110208074A CN110208074A CN201910423429.4A CN201910423429A CN110208074A CN 110208074 A CN110208074 A CN 110208074A CN 201910423429 A CN201910423429 A CN 201910423429A CN 110208074 A CN110208074 A CN 110208074A
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- 239000002689 soil Substances 0.000 title claims abstract description 39
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 239000005416 organic matter Substances 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 16
- 239000000356 contaminant Substances 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000003694 hair properties Effects 0.000 claims description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- 238000010924 continuous production Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 30
- 238000004458 analytical method Methods 0.000 description 6
- 238000005067 remediation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002680 soil gas Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0047—Organic compounds
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- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
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Abstract
The invention discloses a kind of Volatile Organic Compounds in Soil device for fast detecting and its detection methods, device for fast detecting includes: closed heating device, TOC measuring instrument, exhaust gas processing device and several gas flow pipe roads, venthole at the top of closed heating device with TOC measuring instrument air inlet is closed is connected to, TOC measuring instrument gas outlet with exhaust gas processing device is closed is connected to；It is equipped with detachable gas outlet at the top of exhaust gas processing device, company can be matched with gas flow pipe road；Detection method includes heating soil sample, and volatile organic matter enters TOC measuring instrument and continuously measures to obtain volatile organic matter TOC total amount, discharges after absorbing tail gas, and establish the TOC-VOC relationship of pedotheque TOC total amount Yu target contaminant VOC.Solve the problems, such as in the prior art the organic matter content in soil Indexs measure period it is long and costly, detection is quick in time, has timely directive function to continuous production operation.
Description
Technical field
The invention belongs to environmental protection tests and technical field of soil remediation, and in particular to a kind of Volatile Organic Compounds in Soil is fast
Speed detector and its detection method.
Background technique
Volatile organic matter (VOCs) refers to that saturated vapor pressure is more than 70.91Pa or boiling point having less than 260 DEG C at room temperature
Machine object is the most common pollutant of petroleum, chemical industry, pharmacy, printing, building materials and spraying industry discharge.Volatility in soil has
The polluting property that there is machine object concealment, inhomogeneities, volatility, toxic etc. to be different from other pollutants, complicated component are dived
It is big in risk, it should give priority acccess control in remediation contaminated soil.Volatile Organic Compounds in Soil is great environmental in recent years
The important pollutant component part of accident, regulation effect are the important evidence for judging soil remediation engineering project regulation effect,
Project process can largely be promoted by carrying out fast slowdown monitoring at the scene to it.Currently, Volatile Organic Compounds in Soil detection point
There are two main classes for analysis method: drill sampling lab analysis and on-site test analysis.Wherein:
(1) drill sampling lab analysis.Pedotheque is taken out using drilling equipment, laboratory progress is sent to after sealing
It tests and analyzes.This method can carry out accurate qualitative and quantitative analysis to polluter, but sampling and detection work are numerous
It is trivial, high expensive, and take a long time.In addition, pollutant in soil concentration distribution have inhomogeneities, and with change in depth compared with
Greatly, sample point will affect the comprehensive of analysis very little, and sample point then will increase detection and analysis workload too much.
(2) on-site test is analyzed.It has the characteristics that portability, rapidity and can continuously monitor, and volatilizees in soil at present
Property organic matter field quick detection mainly have: (a) detection pipe chemical method by poisonous substance and is solidificated in glass tube reagent and generates
Metachromasia, quantitative and semi-quantitative detection is made to poisonous substance, mainly for toxic gas and VOCs；But this method can not the company of offer
Continuous alarm detection, and detection pipe need to be largely laid in case using, it may cause glass and chemical contamination.(b) PID photoionization is examined
Device is surveyed, organic matter is broken into using a ultraviolet light source by the negative ions that can be detected, the gas charge conversion of ionization
At current signal, VOCs concentration is shown.PID detector is suitable for ionization potential in 10.3eV compound below, if selection
Ionization potential higher than 11eV or more, PID are easy to damage.In addition to this, soil gas is extremely difficult to the state all discharged,
The problem of PID equipment precision is not high, and testing result is difficult to timely and effectively Instructing manufacture, and damp production cost is caused to increase (c)
FID can detect incendivity organic matter, need to configure hydrogen cylinder as ionization source, and need to light fire using sample introduction gas as source of oxygen
Flame, there are security risks.(d) portable gas chromatograph, usually configuration PID, FID or series/parallel formula, although measurement accuracy
Greatly, detection range is wide, but complicated for operation and equipment is expensive.
Summary of the invention
Present invention solves the technical problem that overcome in the prior art organic matter content in soil Indexs measure depend on laboratory
Detection and period length, data are provided slow and costly, it is difficult to which timely and effectively Instructing manufacture causes to increase because of damp production cost
The problem of, the purpose of the present invention is to provide a kind of rapid detection methods of Volatile Organic Compounds in Soil, and detection is quick in time,
Testing result is accurate and reliable, and meets the requirement instructed in time continuous production operation.
Another object of the present invention is to provide the device that above-mentioned detection method quickly detects Volatile Organic Compounds in Soil,
Equipment operation is simple, can meet the measurement accuracy requirement as quick detection device without additional monitoring device.
The technical solution adopted by the present invention to solve the technical problems is:
In a first aspect, Volatile Organic Compounds in Soil device for fast detecting, comprising: closed heating device, TOC measurement
Instrument, exhaust gas processing device and several gas flow pipe roads；Wherein:
Venthole, and the air inlet of the venthole and the TOC measuring instrument are equipped at the top of the closed heating device
By the closed connection in gas flow pipe road I, the gas outlet of the TOC measuring instrument and the exhaust gas processing device are circulated by gas
The closed connection of pipeline II；The exhaust gas processing device is the closed device for absorbing tail gas equipped with water, and top is equipped with detachable
Formula exhaust outlet can match connection with the gas flow pipe road.
Second aspect, the method that Volatile Organic Compounds in Soil is quickly detected by above-mentioned device for fast detecting, specifically,
The following steps are included:
S1: it transports and stores at low ambient temperatures after pedotheque is taken out sealing；
S2: the pedotheque of step S1 is uniformly put into the closed heating device and is heated, volatility is organic
Object enters in the TOC measuring instrument through the volatilization gas circulation duct；Wherein, heating temperature is for 50~260 DEG C and described in ratio
The highest volatile organic matter boiling point of boiling point is 10~20 DEG C high；
S3: under conditions of the closed heating device described in continuous heating, the continuous measuring process S2 institute of TOC measuring instrument
TOC content and record test data in volatile organic matter, until in the volatile organic matter TOC content remain unchanged for
Only, the volatile organic matter TOC total amount is obtained；
S4: opening the escape pipe of the TOC measuring instrument, and is passed through in the exhaust gas processing device and is absorbed into not higher than discharge
It is discharged after standard；
S5: volatile organic matter TOC total amount obtained by step S3 and target contaminant VOC are demarcated, and establish the pass TOC-VOC
System.
Further, in step S5, the target contaminant testing index includes PAHs, PCBs and TPH.
Further, in step S5, the TOC-VOC relationship is in a linear relationship, and slope is approximately 1.
Further, in step S5, the TOC-VOC relationship is in a linear relationship, and slope is 1.
Compared with prior art, the beneficial effects of the present invention are:
1, TOC detector test precision is higher in device for fast detecting of the invention, data difference energy before and after soil treatment
It is enough relatively accurately to reflect treatment effect, and target organic pollutant can be discharged completely by closed heating devices heat
Out, detection accuracy is further increased.
2, detection method of the invention greatly improves soil remediation engineering efficiency, reduces testing cost, can adjust in time
Soil remediation method, and repairing effect intuitively can be judged rapidly, evade soil volatile organic matter detection inaccuracy
Property, there is timely directive function to continuous production operation.
Detailed description of the invention
Fig. 1 is Volatile Organic Compounds in Soil device for fast detecting structural schematic diagram in the present invention；Wherein, 1- is closed adds
Thermal, 2-TOC measuring instrument, 3- exhaust gas processing device, 4- venthole, 5- gas flow pipe road I, 6- gas flow pipe road II.
Fig. 2 is the rapid detection method flow chart of Volatile Organic Compounds in Soil of the present invention.
Fig. 3 is the TOC-VOC relational graph in the present invention between pedotheque TOC total amount and target contaminant VOC.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Referring to Fig. 1, Volatile Organic Compounds in Soil device for fast detecting, comprising: closed heating device 1, TOC measuring instrument
2, exhaust gas processing device 3 and several gas flow pipe roads；Wherein: being equipped with venthole 4 at the top of closed heating device 1, and go out
Stomata 4 is connected to the air inlet of TOC measuring instrument 2 by the way that gas flow pipe road I 5 is closed, the gas outlet of TOC measuring instrument 2 and tail gas
Processing unit 3 passes through the closed connection in gas flow pipe road II 6；Exhaust gas processing device 3 is the closed tail gas absorption dress equipped with water
It sets, top is equipped with detachable exhaust outlet, and connection can be matched with gas flow pipe road.
Referring to fig. 2, the method for Volatile Organic Compounds in Soil quickly being detected by above-mentioned device for fast detecting, specific steps
Are as follows:
(I) is transported and is stored at low ambient temperatures after pedotheque is taken out sealing.
Above-mentioned pedotheque is put into closed heating device and heats by (II), and volatile organic matter is through volatilization gas
Circulation duct enters in TOC measuring instrument；Wherein, heating temperature is 50~260 DEG C and volatile organic matter more highest than boiling point boils
Point is 10~20 DEG C high.
(III) is waved obtained by the continuous measuring process of TOC measuring instrument (II) under conditions of continuous heating closed heating device
TOC content and test data is recorded in hair property organic matter, until TOC content data remains unchanged in volatile organic matter,
Obtain volatile organic matter TOC total amount.
(IV) opens the escape pipe of TOC measuring instrument, and is passed through in exhaust gas processing device and is absorbed into not higher than after discharge standard
Discharge.
(VI) demarcates volatile organic matter TOC total amount obtained by step (III) and target contaminant VOC, establishes TOC-VOC
Relationship, as shown in figure 3, TOC-VOC relationship is in a linear relationship and slope is 1.
Technical solution of the present invention is further explained by specific example, specific as follows:
Before soil remediation engineering construction, selected three emphasis monitoring region is simultaneously sampled, and the soil sample of acquirement is sieved,
Soil sample after sieving is divided into three parts, is in addition detected as first part of Duplicate Samples for two parts, soil sample is first placed in envelope
Enclosed heating device 1, set temperature according to the different set of target contaminant between 50~260 DEG C, tail gas after heating into
Enter TOC detector 2.
After recovery project implementation, the soil sample obtained in former detection zone is sieved, the soil sample matter after guaranteeing sieving
Amount is identical as when detecting for the first time, and is divided into three parts (as used in-situ treatment technology), or in soil after repair with
Machine obtains the soil (as used dystopy processing technique) of phase homogenous quantities, is in addition detected as first part of Duplicate Samples for two parts,
Soil sample is first placed in closed heating device 1, set temperature according to the different set of target contaminant between 50~260 DEG C,
Tail gas after heating enters TOC detector 2.Compare TOC detector the data obtained twice, determines organic contamination if data reduce
Object VOC improvement reaches a certain level effect.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. Volatile Organic Compounds in Soil device for fast detecting characterized by comprising closed heating device (1), TOC are surveyed
Measure instrument (2), exhaust gas processing device (3) and several gas flow pipe roads；Wherein:
Venthole (4) are equipped at the top of the closed heating device (1), and the venthole (4) and the TOC measuring instrument (2)
Air inlet pass through the closed connection in gas flow pipe road I (5)；The gas outlet of the TOC measuring instrument (2) and the vent gas treatment fill
It sets (3) and passes through the closed connection in gas flow pipe road II (6)；The exhaust gas processing device (3) is that the closed tail gas equipped with water is inhaled
Receiving apparatus, top are equipped with detachable gas outlet, can match connection with the gas flow pipe road.
2. the detection method of Volatile Organic Compounds in Soil, which is characterized in that fast by device for fast detecting described in claim 1
Speed detection Volatile Organic Compounds in Soil, comprising the following steps:
S1: it transports and stores at low ambient temperatures after pedotheque is taken out sealing；
S2: the pedotheque of step S1 being uniformly put into the closed heating device and is heated, volatile organic matter warp
The volatilization gas circulation duct enters in the TOC measuring instrument；Wherein, heating temperature is 50~260 DEG C and than the boiling point
Highest volatile organic matter boiling point is 10~20 DEG C high；
S3: it under conditions of the closed heating device described in continuous heating, is waved obtained by the continuous measuring process S2 of TOC measuring instrument
TOC content and test data is recorded in hair property organic matter, until TOC content remains unchanged in the volatile organic matter,
Obtain the volatile organic matter TOC total amount；
S4: the escape pipe of the TOC measuring instrument is opened, and is passed through in the exhaust gas processing device and is absorbed into not higher than discharge standard
After discharge；
S5: volatile organic matter TOC total amount obtained by step S3 and target contaminant VOC are demarcated, TOC-VOC relationship is established.
3. detection method according to claim 2, which is characterized in that in step S5, the target contaminant testing index
Including PAHs, PCBs and TPH.
4. detection method according to claim 2, which is characterized in that in step S5, the TOC-VOC relationship is linearly closed
System, and slope is approximately 1.
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| CN201910423429.4A CN110208074A (en) | 2019-05-21 | 2019-05-21 | A kind of Volatile Organic Compounds in Soil device for fast detecting and its detection method |
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| CN201910423429.4A CN110208074A (en) | 2019-05-21 | 2019-05-21 | A kind of Volatile Organic Compounds in Soil device for fast detecting and its detection method |
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Cited By (2)
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| CN111103377A (en) * | 2019-11-20 | 2020-05-05 | 中节能天融科技有限公司 | Soil volatile organic compounds flame ion detecting system |
| CN115060569A (en) * | 2022-08-17 | 2022-09-16 | 常州磐宇仪器有限公司 | Rapid enrichment system and method for soil VOCs analysis and detection |
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