CN109060755A - A kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology - Google Patents

A kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology Download PDF

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Publication number
CN109060755A
CN109060755A CN201811224897.0A CN201811224897A CN109060755A CN 109060755 A CN109060755 A CN 109060755A CN 201811224897 A CN201811224897 A CN 201811224897A CN 109060755 A CN109060755 A CN 109060755A
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laser
time
detection device
fluorescence
real
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吴翩翩
尹业新
聂溧
徐敏
郑孟杰
梁德秀
陈小萍
刘淦源
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Nanjing Yuhua Environmental Technology Co Ltd
Nanjing Yi Yun Environmental Technology Co Ltd
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Nanjing Yuhua Environmental Technology Co Ltd
Nanjing Yi Yun Environmental Technology Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64Fluorescence; Phosphorescence
    • G01N21/6428Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
    • G01N21/643Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0106General arrangement of respective parts
    • G01N2021/0112Apparatus in one mechanical, optical or electronic block

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  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Molecular Biology (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

The soil pollution real-time in-situ detection device based on laser fluorescence inductive technology that the invention discloses a kind of.The detection device includes drill bit, laser transmitting system, detection system, data acquisition processing system and control system;Drill bit is equipped with probe, laser transmitting system emission pulse laser signal is transmitted at probe, soil pollutant at probe is by laser excitation, generate fluorescence signal, then fluorescence signal passes to detection system and is detected, it is finally handled by data of the data acquisition processing system to detection, and exports result in real time;Control system is connect with drill bit, laser transmitting system and detection system respectively.Detection device of the invention carries out contaminated site real-time investigation using LIF technology, and the detection of real-time in-situ can be carried out to the organic pollutant in soil, and provides the distributed in three dimensions of pollutant in the soil in real time.

Description

A kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology
Technical field
The present invention relates to a kind of soil pollution original position real-time detection apparatus using laser fluorescence inductive technology, belong to environment Investigation and recovery technique field.
Background technique
Currently, the problem of environmental pollution in China is extremely serious, public qualities of life has been seriously affected.In crowd In more pollutions, soil contamination problem very severe.Soil pollution has concealment and hysteresis quality, is different from atmosphere pollution and water is dirty Dye generally can be experienced directly by people, and the pollutant in soil is often difficult to be considered perceiving, it is necessary to by corresponding work Tool.And from the generation of soil pollution to discovery, generally require for a long time.Since soil circulation itself is slow, self-purification capacity Difference, pollutant are difficult to dilute in the soil, therefore soil pollution has cumulative bad.Underground geologic structure is complicated, often has There is inhomogeneities, therefore distributional difference is big in the soil for pollutant.Pollutant in soil usually requires long time ability Degradation, therefore once pollute, often there is irreversibility, the treatment cost of soil pollution is high, the period is long, and difficulty is big.Soil The above feature of earth pollution proposes strict requirements to the investigation in soil pollution place.
In order to avoid irreversible consequence caused by soil pollution, it is necessary to accomplish early discovery to soil pollution, and investigate thoroughly pollution The spatial distribution of object in the soil.Site investigation method used at present such as takes core and installation monitoring well using drilling equipment Sample is acquired, then send lab analysis sample again, this method analytical cycle is long, and can only obtain the knot of dotted information Fruit can not quickly and effectively determine object pollution range at the scene.Especially in organic pollution place, organic matter is waved in sampling process Hair generates loss, can also generate certain loss in transportational process;Non-soluble liquid present in organic contamination place simultaneously The form and inorganic pollution that (Nonaqueous Phase Liquids, NAPLs) pollutant exists and migrated in underground environment Object makes a big difference, and traditional investigation method is difficult to investigate thoroughly NAPLs in the distribution of underground.Therefore it must use one kind can be fast Fast in situ detection organic contaminants in soil and the technology for determining pollutant spatial distribution solve at present in organic pollution of soil Relevant issues in investigation.
Laser induced fluorescence (Laser Induced Fluorescence, LIF) technical principle is that substance swashs in exciting light Give the effect for generating fluorescence.Many organic pollutants can be tested using the technology, there is high resolution, detection limit Low advantage, it is especially sensitive to polycyclic aromatic hydrocarbon detection, there is good detection effect to NAPLs pollutant.According to domestic literature With the investigation of patent, LIF is only used in laboratory at present, the problem of not can solve current site investigation.
Summary of the invention
It is an object of the invention to overcome the technical problem in current contaminated site fact-finding process, specifically include: in soil Organic pollutant sample and circulate process can generate loss, cause measurement concentration it is relatively low;It samples, send the lab analysis period Long, research cost is high, can not quickly determine the range of pollution at the scene;It can only obtain the dotted information of contaminated site pollutant, It is unable to get the three-dimensional spatial distribution of high-resolution pollutant;NAPLs pollutant can not be tested effectively.Cause This, the soil pollution real-time in-situ detection device based on laser fluorescence inductive technology that the invention proposes a kind of.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology, including drill bit, Laser emission System, detection system, data acquisition processing system and control system;The drill bit is equipped with probe, laser transmitting system transmitting Pulsed laser signal is transmitted at probe, and the soil pollutant at probe is generated fluorescence signal, then fluorescence by laser excitation Signal passes to detection system and is detected, and is finally handled by data of the data acquisition processing system to detection, and in real time Export result;The control system is connect with drill bit, laser transmitting system and detection system respectively.
Further, the bottom of the drill bit is additionally provided with conductivity measurement.
Further, the conductivity measurement is connect with data acquisition processing system.
Further, excitation fiber and acquisition optical fiber are connected on the probe, laser signal is transmitted to by excitation fiber At probe, optical fiber is acquired by fluorescence signal and passes to detection system.
Further, the laser transmitting system uses multiband all solid state laser, the parallel pulse that laser issues Laser beam obtains the monochromatic pulses excitation beam of fixed wave length after frequency-doubling crystal and optical filter, then poly- by convex lens Light is coupled to excitation fiber using laser couplers.
Further, the detection system includes monochromator and Intensified Charge Coupled Device, and the access of monochromator one end is adopted Collect optical fiber, the other end is connect with Intensified Charge Coupled Device, and Intensified Charge Coupled Device and data acquisition processing system connect It connects.
Further, the detection device measures bit depth data, the string formula displacement using string formula displacement measurement device Tester is connect with data acquisition processing system.
Further, the probe internally provided optical path for having change laser signal direction.
Further, data acquisition processing system exports fluorescence intensity-bit depth two dimensional plot and conductivity in real time Intensity-bit depth two dimensional plot, and the spectroscopic data of acquisition is carried out by big data database and artificial intelligence system Comparison carries out qualitative and quantitative analysis to polluter, and provides the three-dimensional spatial distribution figure of polluter.
The present invention proposes a kind of device that contaminated site real-time investigation is carried out using LIF technology, and the probe of LIF is integrated in In the drill bit of boring tool, spectrometer and data processing system are integrated in ground, direct push-feed drill are relied on, in soil Organic pollutant carry out the detection of real-time in-situ, and provide pollutant distributed in three dimensions in the soil in real time.Compared to existing skill Art, the invention has the following advantages that
(1) present invention is the in situ detection device of a kind of pair of underground pollutant in soil, by means of direct push-feed drill, It is small to soil disturbance, the real information of available pollutant in soil matter.
(2) present invention is the real-time detection apparatus of a kind of pair of underground pollutant in soil, send reality after sampling with conventional on-site The investigation method for testing room analysis is compared, and poll cycle can be greatly shortened, and enhances the specific aim of sampling analysis conceptual design, is reduced The amount of waste and research cost that sampling analysis workload, investigation generate have far reaching significance to contaminated site investigation.
(3) detection device of the invention, not can only obtain the polluted information of single-point soil, but be capable of providing in soil The three-dimensional spatial distribution of polluter.
(4) using LIF technology as testing principle, to the NAPLs pollutant high sensitivity in soil, detection limit is low.No It needs to be a kind of detection mode contactless, without secondary pollution using any chemical reagents.
(5) all solid state laser is used, the laser set advantage of Conventional solid-state lasers and semiconductor laser, It is big with power, stability is strong, monochromaticjty is good and the advantages such as wide waveband, the multi-wave band laser from ultraviolet to infrared can be launched. It works and is different from laboratory work at the scene, the laser stability is high, can effectively ensure that the stability in field work.
(6) serial ports of the sapphire camera lens as pulse laser and fluorescence is used, light transmission rate is high, wearability is strong, has very High chemical stability.Sapphire has outstanding surface hardness, and the range of transmitance extends to middle infrared wavelength from ultraviolet Region.
(7) it samples monochromator and ICCD cooperation is used as fluorescence detecting system, fluorescent noise can be substantially reduced, improve fluorescence Signal strength.For the fluorescence that soil contaminant generates generally in nanosecond rank, fluorescence intensity is general also very weak, and live work It is poor to make environment.Some interference fluorescence can be deleted by monochromator, fluorescence noise can be substantially reduced by ICCD, had Time resolution function can acquire the fluorescence signal of completion, and amplify fluorescence strong signal by built-in amplifier.
(8) data acquisition processing system can further decrease the signal-to-noise ratio of fluorescence, improve the reliability of data.And it can Fluorescence intensity-bit depth two dimensional plot and conductivity intensity-bit depth two dimensional plot are generated in real time;Data Post Qualitative, quantitative analysis can be carried out to the substance in soil by big data database and artificial intelligence help in the process.
Detailed description of the invention
Fig. 1 is the soil pollution real-time in-situ detection device principle sketch based on laser fluorescence inductive technology;
Fig. 2 is the soil pollution real-time in-situ detection device functional block diagram based on laser fluorescence inductive technology.
In figure: 1- pulse delay generator;2- all solid state laser;3- pulse laser;4- frequency-doubling crystal;5- optical filter; 6- convex lens;7- laser couplers;The fluorescence of 8- pollutant;9- excitation fiber;10- acquires optical fiber;11-LIF drill bit;12- electricity Conductivity sensor;13-LIF probe;14- sapphire camera lens;15- monochromator;16- Intensified Charge Coupled Device (ICCD);17- PC (PC);The ground 18-;Pollutant in 19- soil.
Specific embodiment
In order to which those skilled in the art better understand technical solution of the present invention, with reference to the accompanying drawing and it is embodied Example is described in further detail the present invention.As shown in Figure 1, a kind of soil based on laser fluorescence inductive technology of the present embodiment Earth pollutes real-time in-situ detection device, including the acquisition of LIF drill bit 11, LIF laser transmitting system, LIF detection system, LIF data Processing system and LIF control system.At work, LIF drill bit 11 is in underground, remaining system is in earth's surface for the device.It is controlled in LIF Under the control of system processed, the device is by means of the impact dynamic of direct push-feed drill or the gravity static pressure of other carriers offer The LIF drill bit 11 of integrated LIF probe 13, EC conductivity sensor 12 and optical fiber is pressed into underground, using detector for displacement measuring reality by power When measurement LIF drill bit in the depth of underground, conductivity sensor 12 measures the conductivity in soil, the data of both It is transmitted to LIF data acquisition processing system in real time.The continuous emission pulse laser signal of LIF laser transmitting system of earth's surface simultaneously, warp Excitation fiber 9 is crossed to be transmitted at LIF probe 13.The pollutant popped one's head at 13 is generated fluorescence signal, by acquiring by laser excitation Optical fiber 10 is transmitted to the LIF detection system of earth's surface, and detection system first carries out optical path processing to fluorescence signal, then detected. It is finally handled by data of the LIF data acquisition processing system to detection, graphically output in real time.
LIF probe 13 is arranged close to the side of 11 front end of drill bit, and excitation fiber 9 is accessed in the upper end of conductivity sensor 12 With acquisition optical fiber 10.LIF probe 13 built in optical path, by by excitation fiber 9 vertically into pulse excitation light become horizon light Line;And polluter is switched into vertical light by horizontal light because of fluorescence caused by excitation, using coupler by fluorescence coupling It is incorporated into acquisition optical fiber 10.Exciting light and fluorescence can through the sapphire camera lens of drill bit LIF probe 13, and excitation fiber 9 with adopt Collecting optical fiber 10 is two independent optical paths.
LIF laser transmitting system uses multiband all solid state laser 2, and the parallel pulse laser beam of sending successively passes through again The monochromatic pulses excitation beam that fixed wave length can be obtained after frequency crystal 4, optical filter 5, using 6 optically focused of convex lens, by laser Coupler 7 is coupled to excitation fiber 9.
LIF detection system includes monochromator 15 and the enhanced charge for having time resolution function, pulse delay generator Coupled apparatus (Intensified Charge Coupled Device, ICCD) 16 is constituted.Acquisition is accessed in one end of monochromator 15 Optical fiber 10, the other end is connect with ICCD16, and the other end of ICCD16 is connect with PC 17.Fluorescence is passed via acquisition optical fiber 10 The defeated monochromator 15 to ground, monochromator 15 will not be the fluorescence rejectings in setting wave band.It will be faint using ICCD16 Fluorescence signal switchs to electric signal and amplifies, and transmits a signal to LIF data acquisition processing system.
LIF control system, LIF data acquisition processing system are controlled by PC 17 (Personal Computer, PC) System and realization.Mainly the excitation wavelength of control all solid state laser 2 and frequency, control monochromator 15 are received for PC 17 Fluorescence bands and slit width and control ICCD16 in pulse delay generator.Pulse delay generator has two-way control, Trigger the gate of ICCD16 all the way to control the opening time of ICCD 16 to inhibit stray light, another way triggers laser and generates Laser pulse.The acquisition of LIF data mainly receives spectral information, EC conductivity data and the LIF bit depth that ICCD16 is transmitted Data.LIF data processing mainly includes the storage, output and post-processing of data pre-processing, generating date and data.Preceding place Reason includes: to be eliminated between different variables using modes such as centralization transformation, equalization transformation, range transformations because of magnitude, data distribution The error Deng caused by;The noise of fluorescence caused by being reduced using modes such as smoothing processings because of environmental background, equipment factor etc..Data Processing in real time are as follows: export fluorescence intensity-brill in real time using pretreated fluorescence data, conductivity data and bit depth data Head depth two dimensional plot and conductivity intensity-bit depth two dimensional plot.Data Post process is by big data data Library and artificial intelligence system compare the spectroscopic data of acquisition, carry out qualitative and quantitative analysis to polluter, and provide dirt Contaminate the three-dimensional spatial distribution figure of substance.
Embodiment
Certain pesticide chemical factory requires through environmental protection administration, needs to investigate the soil of its on-site.According to the insecticide factory The data of offer, based on miscellaneous fill and clay, polluter is mostly the non-aqueous phase polluter such as polycyclic aromatic hydrocarbon for the plant area.Such as Fig. 1 opens PC 17, all solid state laser 2, monochromator 15 and ICCD16, and to all solid state laser all-solid state laser Device 2, monochromator 15 and ICCD16 are preheated.After preheating, swashing for all solid state laser 2 is arranged by the control software of PC Optical wavelength and frequency;The received fluorescence bands of monochromator 15 and slit width are set;The time resolution gate-width of ICCD16 is set;If The parameter of pulse delay generator 1 is set to coordinate the shutter opening time of laser pulse width and ICCD16, guarantees receiving whole Ambient noise is minimized while fluorescence signal, improves the signal-to-noise ratio of system.
Bit depth in going down process is measured using the string formula displacement measurement device Stringpot of Gepprobe company, it will The Stringpot of measurement bit depth is connect with direct push-feed drill, is pressed LIF drill bit 11 by means of direct push-feed drill Enter underground.Pulse laser 3 is coupled into excitation fiber 9 by LIF laser transmitting system, and pulse laser 3 is transmitted by excitation fiber 9 To the LIF probe 13 in LIF drill bit 11, becomes horizontal direction by the optical path in LIF probe 13, shone through sapphire camera lens 14 The pollutant 19 being mapped in soil.Pollutant 19 in soil receives the excitation of pulse laser 3 and generates fluorescence 8.Pollutant fluorescence 8 passes through Acquisition optical fiber 10 is coupled to by the optical path of LIF probe 13.Acquisition optical fiber 10 detects the LIF that pollutant fluorescence 8 is transferred to earth's surface System, first monochromator (15) are arranged the pollutant fluorescence 8 other than wave band and are all rejected, and remaining fluorescence passes through ICCD16 Noise reduction and enhanced processing spectral signal passed into PC 17.PC 17 is by the depth for the LIT drill bit 11 being collected into The soil conductivity information that degree information, the spectral information of ICCD16 and conductivity sensor 12 provide is handled.As LIF is bored First 11 are constantly pushed, and above data is constantly collected into.
For the data of acquisition, the pre-treatments such as noise reduction are carried out to the spectral information of ICCD16 first, it is strong to generate fluorescence in real time Degree-bit depth two dimensional plot and conductivity intensity-bit depth two dimensional plot.After all the points bit test, knot The three-dimensional spatial distribution figure of structure data post-processing software generation polluter.

Claims (9)

1. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology, which is characterized in that including drill bit, Laser transmitting system, detection system, data acquisition processing system and control system;The drill bit is equipped with probe, Laser emission System emission pulse laser signal is transmitted at probe, and the soil pollutant at probe is generated fluorescence signal by laser excitation, Then fluorescence signal passes to detection system and is detected, and is finally carried out by data of the data acquisition processing system to detection Reason, and result is exported in real time;The control system is connect with drill bit, laser transmitting system and detection system respectively.
2. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 1, It is characterized in that, the bottom of the drill bit is additionally provided with conductivity measurement.
3. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 2, It is characterized in that, the conductivity measurement is connect with data acquisition processing system.
4. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 1, It is characterized in that, being connected with excitation fiber and acquisition optical fiber on the probe, laser signal is transmitted at probe by excitation fiber, It acquires optical fiber and fluorescence signal is passed into detection system.
5. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 4, It is characterized in that, the laser transmitting system uses multiband all solid state laser, the parallel pulse laser beam that laser issues The monochromatic pulses excitation beam of fixed wave length is obtained after frequency-doubling crystal and optical filter, then passes through convex lens optically focused, then pass through It crosses laser couplers and is coupled to excitation fiber.
6. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 4, It is characterized in that, the detection system includes monochromator and Intensified Charge Coupled Device, the access of monochromator one end acquires optical fiber, The other end is connect with Intensified Charge Coupled Device, and Intensified Charge Coupled Device is connect with data acquisition processing system.
7. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 1, It is characterized in that, the detection device measures bit depth data, the string formula displacement measurement device using string formula displacement measurement device It is connect with data acquisition processing system.
8. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 1, It is characterized in that, the probe internally provided optical path for having change laser signal direction.
9. a kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology according to claim 1, It is characterized in that, data acquisition processing system exports fluorescence intensity-bit depth two dimensional plot and conductivity intensity-brill in real time Head depth two dimensional plot, and the spectroscopic data of acquisition is compared by big data database and artificial intelligence system, it is right Polluter carries out qualitative and quantitative analysis, and provides the three-dimensional spatial distribution figure of polluter.
CN201811224897.0A 2018-10-19 2018-10-19 A kind of soil pollution real-time in-situ detection device based on laser fluorescence inductive technology Pending CN109060755A (en)

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CN109916938A (en) * 2019-03-08 2019-06-21 山东省农业科学院畜牧兽医研究所 A method of the measurement soil organism adsorbs organic pollutant spatial distribution
CN110231319A (en) * 2019-06-03 2019-09-13 中国科学院合肥物质科学研究院 The laser induced fluorescence system of petroleum hydrocarbon class pollutant in field quick detection soil
CN111089852A (en) * 2019-12-20 2020-05-01 中国科学院合肥物质科学研究院 Vertical section distribution in-situ detection system for petroleum hydrocarbon pollutants in polluted site
CN113008806A (en) * 2021-03-02 2021-06-22 农业农村部环境保护科研监测所 Agricultural product production area heavy metal spatial distribution determination method
CN114324281A (en) * 2021-12-30 2022-04-12 中国科学院合肥物质科学研究院 Soil organic pollutant is fluorescence collection device for in situ monitoring analysis
CN115290619A (en) * 2022-08-05 2022-11-04 南京贻润环境科技有限公司 Method and device for detecting colloidal active carbon in soil or underground water

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109916938A (en) * 2019-03-08 2019-06-21 山东省农业科学院畜牧兽医研究所 A method of the measurement soil organism adsorbs organic pollutant spatial distribution
CN110231319A (en) * 2019-06-03 2019-09-13 中国科学院合肥物质科学研究院 The laser induced fluorescence system of petroleum hydrocarbon class pollutant in field quick detection soil
CN111089852A (en) * 2019-12-20 2020-05-01 中国科学院合肥物质科学研究院 Vertical section distribution in-situ detection system for petroleum hydrocarbon pollutants in polluted site
CN111089852B (en) * 2019-12-20 2022-09-02 中国科学院合肥物质科学研究院 Vertical section distribution in-situ detection system for petroleum hydrocarbon pollutants in polluted site
CN113008806A (en) * 2021-03-02 2021-06-22 农业农村部环境保护科研监测所 Agricultural product production area heavy metal spatial distribution determination method
CN114324281A (en) * 2021-12-30 2022-04-12 中国科学院合肥物质科学研究院 Soil organic pollutant is fluorescence collection device for in situ monitoring analysis
CN115290619A (en) * 2022-08-05 2022-11-04 南京贻润环境科技有限公司 Method and device for detecting colloidal active carbon in soil or underground water

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