CN115290619A - Method and device for detecting colloidal active carbon in soil or underground water - Google Patents
Method and device for detecting colloidal active carbon in soil or underground water Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 237
- 239000002689 soil Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 10
- 239000006185 dispersion Substances 0.000 claims abstract description 6
- 230000002776 aggregation Effects 0.000 claims abstract description 5
- 238000004220 aggregation Methods 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 39
- 239000000725 suspension Substances 0.000 claims description 29
- 229910052594 sapphire Inorganic materials 0.000 claims description 24
- 239000010980 sapphire Substances 0.000 claims description 24
- 238000001917 fluorescence detection Methods 0.000 claims description 21
- 238000011088 calibration curve Methods 0.000 claims description 16
- 238000004043 dyeing Methods 0.000 claims description 16
- 239000003673 groundwater Substances 0.000 claims description 15
- 238000002474 experimental method Methods 0.000 claims description 14
- 239000000084 colloidal system Substances 0.000 claims description 9
- 238000009924 canning Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 5
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000013508 migration Methods 0.000 claims 1
- 230000005012 migration Effects 0.000 claims 1
- 230000004888 barrier function Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000008263 repair mechanism Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001499 laser induced fluorescence spectroscopy Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
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- 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
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6439—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" with indicators, stains, dyes, tags, labels, marks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N2021/6463—Optics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N2021/6463—Optics
- G01N2021/6478—Special lenses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N2021/6484—Optical fibres
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Abstract
The invention discloses a method and a device for detecting colloidal activated carbon in soil or underground water, and relates to the technical field of material detection. Selecting a detection range according to the injection region, selecting a plurality of detection point locations in the detection range, and selecting a plurality of depth point locations in the detection point locations based on the soil depth; acquiring a fluorescence signal of the depth point location; carrying out data processing on the fluorescence signals to obtain active carbon concentration information of depth point positions; the method comprises the steps of obtaining the concentration information of the colloidal activated carbon of all depth points in a detection range, generating a concentration information set, obtaining a three-dimensional graph of the activated carbon distribution in the detection range based on the concentration information set, and judging the form of the activated carbon to be in an aggregation state or a dispersion state through the three-dimensional graph. The method can issue a three-dimensional distribution map according to the high-density point location information, so that the distribution form of the activated carbon is judged, the distribution form of the colloidal activated carbon is directly reproduced, the injection and repair effects of the permeable reactive barrier are intuitively judged, and the method is favorable for further exploring the repair mechanism of the colloidal activated carbon.
Description
Technical Field
The invention relates to the technical field of material detection, in particular to a detection technology for detecting colloidal activated carbon of a soil underground water repairing material, which is distributed in soil after being used.
Background
The colloidal active carbon takes biomass as a raw material, is subjected to high-temperature carbonization and water vapor activation, is ground by a superfine grinding technology to prepare micron-sized particles, is added with a proper amount of dispersant and water solution to prepare a colloidal form, and can be injected into soil and underground water for adsorption through an injection system.
After being injected into soil and groundwater, the colloidal activated carbon migrates in soil gaps and groundwater runoff to form an adsorption barrier similar to a permeable reactive wall, so that pollutants flowing through the soil and groundwater in the injection area can be well adsorbed, and the concentration of the pollutants in the soil and groundwater can be rapidly reduced. The repairing effect can be judged by detecting the concentration of pollutants before and after the injection of the colloid activated carbon on one hand and the distribution condition of the injected colloid activated carbon in the soil on the other hand. The distribution condition of the colloidal activated carbon in the soil and the underground water can be determined by detecting the concentrations of the colloidal activated carbon at different positions.
The distribution condition of the colloid activated carbon in the soil after injection is mostly qualitative analysis, the distribution concentration of the colloid activated carbon in the soil after injection is difficult to quantitative analysis, the existing colloid activated carbon quantitative detection method takes out a soil sample and sends the soil sample to a laboratory for analysis and determination, the method is time-consuming and labor-consuming, and the loss of the colloid activated carbon can be caused in the sampling process, so that the detection result is inaccurate. Therefore, in-situ detection can be used for more effectively detecting the distribution condition of the colloidal activated carbon in the soil.
The in-situ detection technology can detect the concentration of colloidal active carbon at different depths in soil by extending a detection probe into the soil, when the technology is used for in-situ detection of the colloidal active carbon, firstly, the colloidal active carbon needs to be subjected to fluorescent dyeing, the colloidal active carbon is dispersed and migrated stably in the soil after injection is finished, a laser induced fluorescence detector probe is pushed into the soil at different depths by a direct-push drilling machine, laser is emitted through a laser optical fiber, the dyed colloidal active carbon emits fluorescence after being irradiated by the laser, the fluorescence is reflected by a convex lens through a sapphire window, is received by a collecting optical fiber and is transmitted to a fluorescence detection system, and the detected fluorescence signal is subjected to data processing according to a calibration curve to obtain the concentration of the active carbon at a certain point and a certain depth.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for detecting colloidal activated carbon in soil or groundwater, so as to achieve the purpose of avoiding sample loss during sampling and detecting three-dimensional distribution of activated carbon.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for detecting colloidal activated carbon in soil or underground water comprises the following specific steps:
selecting a detection range according to an injection region, selecting a plurality of detection point locations in the detection range, and selecting a plurality of depth point locations based on soil depth at the detection point locations;
acquiring a fluorescence signal of the depth point location;
carrying out data processing on the fluorescence signals to obtain the active carbon concentration information of the depth point;
and acquiring the concentration information of the colloidal activated carbon of all the depth points in the detection range, generating a concentration information set, obtaining a three-dimensional graph about the distribution of the activated carbon in the detection range based on the concentration information set, and judging the form of the activated carbon to be in an aggregation state or a dispersion state according to the three-dimensional graph.
The acquisition method of the injection region comprises the following steps:
performing fluorescent dyeing on the activated carbon in the colloid form to obtain dyed activated carbon;
injecting the dyed activated carbon into a land to be tested;
and after the injection is finished, obtaining the injection area after the dyed activated carbon is dispersed and stably migrated in the soil.
The method for acquiring the fluorescence signal comprises the following steps:
the depth point position is appointed with the drill bit penetration of straight push rig, laser emitter in the drill bit launches laser through launching fiber optic cable, the dyed activated carbon receives laser irradiation back and sends fluorescence, fluorescence is received as fluorescence signal by gathering fiber optic cable after passing through the sapphire window and refracting through convex lens.
The data processing comprises the following specific steps:
transmitting the fluorescence signal to a fluorescence detection system, wherein the fluorescence detection system converts the fluorescence signal to obtain a fluorescence digital signal, the fluorescence detection system transmits the fluorescence digital signal to a data acquisition system, and the data acquisition system transmits the concentration and depth information of the activated carbon to a computer; and the computer performs data processing on the fluorescence signal according to a calibration curve to obtain the active carbon concentration of the depth point position, and binds depth information corresponding to the active carbon concentration with the active carbon concentration to obtain the active carbon concentration information.
The calibration curve is obtained through a calibration experiment, and the calibration curve obtaining method comprises the following steps:
carrying out fluorescent dyeing on the colloidal activated carbon suspension for experiment to prepare a dyed activated carbon suspension, placing the dyed activated carbon suspension in a headspace bottle, inverting the headspace bottle on a sapphire window, obtaining the fluorescence intensity corresponding to the concentration of the activated carbon for experiment by changing the concentration of the activated carbon for experiment in the colloidal activated carbon suspension for experiment, obtaining the linear relation between the concentration of the activated carbon for experiment and the fluorescence intensity based on the concentration of the activated carbon for experiment and the fluorescence intensity, and obtaining a calibration curve by fitting the linear relation.
The drill bit is provided with a depth finder, the depth finder obtains the depth information in real time according to the depth of the drill bit entering the soil, the depth finder sends the depth information to the data acquisition system, and the data acquisition system sends the depth information to a computer.
Furthermore, the bottom of the drill bit is provided with a conductivity element, the conductivity element is used for detecting soil layer conductivity signals, the conductivity element transmits the conductivity signals to a conductivity data acquisition system, the conductivity data acquisition system converts the conductivity signals into conductivity information and then transmits the conductivity information to the data acquisition system, the data acquisition system transmits the conductivity information to the computer, and the computer obtains a linear relation graph of conductivity and depth according to the conductivity information and the depth information.
A device for detecting colloidal active carbon in soil or underground water,
the method comprises the following steps: the device comprises a drill bit, a fluorescence detection module, a laser emitter, a data acquisition module, a computer, an emitting optical fiber, an acquisition optical fiber, a sapphire window, a convex lens and a depth finder;
the data port of the computer is electrically connected with the control port of the laser emitter, the laser emitter is provided with the emission optical fiber, the emission optical fiber is arranged in the cavity of the drill bit, and the laser emitter is connected with the emission optical fiber in a light guide way;
the acquisition optical fiber is arranged in the cavity of the drill bit, the acquisition optical fiber is in photoelectric connection with the fluorescence detection module, and a data port of the fluorescence detection module is electrically connected with a data port of the data acquisition module;
the sapphire window is embedded in the drill bit;
the convex lens is embedded in the cavity of the drill bit;
the depth finder is embedded in the drill bit, and a data port of the depth finder is electrically connected with a data port of the data acquisition module;
the data port of the data acquisition module is electrically connected with the data port of the computer;
the transmitting optical fiber is used for conducting laser emitted by the laser emitter and is also used for transmitting the laser to the convex lens; the convex lens is used for receiving the laser emitted by the optical fiber, diffusing the laser and transmitting the laser to the outside of the cavity of the drill bit through the sapphire window; the collection optical fiber is used for receiving fluorescence from the outside of the cavity of the drill bit to the inside of the cavity of the drill bit through the sapphire window.
Also comprises a dyeing active carbon suspension and a headspace bottle;
the dyeing activated carbon suspension liquid is filled in the headspace bottle, and the dyeing activated carbon suspension liquid filled in the headspace bottle is used for measuring and obtaining a calibration curve.
The device also comprises a conductivity element and a conductivity parameter acquisition module;
the conductivity element is embedded in the drill bit, a data port of the conductivity element is electrically connected with a data port of the conductivity parameter acquisition module, and a data port of the conductivity parameter acquisition module is electrically connected with a data port of the data acquisition module.
According to the technical scheme, compared with the prior art, the invention discloses the method and the device for detecting the colloidal activated carbon in the soil or underground water, so that the following beneficial effects can be obtained:
1. compared with the conventional detection method for judging the existence of the colloidal activated carbon by sampling, the method for detecting the colloidal activated carbon in the soil and the groundwater in situ on line based on the fluorescence technology is provided, is suitable for any soil type, is convenient and fast to operate, can detect the concentration of the colloidal activated carbon in situ in real time by relying on a direct-push drilling machine, can greatly shorten the detection time, avoids the loss of samples in the sampling process, and ensures the accuracy of the detection result.
2. Compared with the prior method for sampling, observing and qualitatively judging the injection condition of the colloidal activated carbon, the method can quantitatively detect the concentration of the colloidal activated carbon at a certain depth of a certain point, and meanwhile, the longitudinal distribution of the concentrations of the activated carbon at different depths of a certain point can be obtained by adjusting the drilling depth.
3. Compared with the traditional method for evaluating the repairing effect of the permeable reactive barrier by detecting the concentration of pollutants in soil, the method can provide a three-dimensional distribution map according to the high-density point location information, so that the distribution form of the activated carbon is judged, the distribution form of the colloidal activated carbon is more directly reproduced, the injection and repairing effects of the permeable reactive barrier are intuitively judged, the repairing mechanism of the colloidal activated carbon is favorably further explored, and a data basis is provided for academic research and practical engineering application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the structure of the calibration experiment apparatus of the present invention;
in the figure: 1-drill bit, 2-conductivity element, 3-emission optical fiber, 4-collection optical fiber, 5-sapphire window, 6-convex lens, 7-dyed activated carbon, 8-dyed activated carbon suspension and 9-headspace bottle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1: as shown in fig. 1 and fig. 2, a method for detecting colloidal activated carbon in soil or groundwater comprises the following specific steps:
s1, selecting a detection range and a detection point according to an activated carbon injection area with a fluorescent characteristic;
s2, the drill bit 1 is penetrated into a designated point by relying on a direct-push drilling machine, a laser emitter emits laser through a laser optical fiber, dyed colloidal active carbon emits fluorescence after being irradiated by the laser, penetrates through a sapphire window 5, is refracted through a convex lens 6, is received by a collecting optical fiber 4 and is transmitted to a fluorescence detection system;
s3, after the detected fluorescence signal is subjected to data processing according to a calibration curve, the concentration of the activated carbon at a certain point position and a certain depth can be obtained;
s4, continuously repeating the steps to obtain the concentration information of the colloidal activated carbon of all monitoring points in a certain detection range, and providing a three-dimensional graph of the activated carbon distribution in the high-density monitoring point range of the site so as to judge the form of the activated carbon, namely the aggregation state or the dispersion state;
furthermore, the drill bit 1 is connected with a depth finder, and depth information can be obtained in real time along with the depth of the drill bit 1 and is connected with a data acquisition system;
further, the bottom of the drill bit 1 is provided with a conductivity element 2 which is connected with a data acquisition system through an electric lead, so that the conductivity of soil layers with different depths can be detected, and a linear relation graph of the conductivity and the depth is obtained;
further, a calibration experiment adopts dyed activated carbon suspension 8, the dyed activated carbon suspension is arranged in a headspace bottle 9, the bottle body is placed on a sapphire window 5 in a reversed mode, corresponding fluorescence intensity is obtained by changing the concentration of the dyed activated carbon suspension 8, a linear relation between the concentration of colloidal activated carbon and the fluorescence intensity is obtained through multiple experiments, and a calibration curve is obtained through fitting.
Example 2: a device for detecting colloidal active carbon in soil or underground water,
the method comprises the following steps: the device comprises a drill bit 1, a fluorescence detection module, a laser emitter, a data acquisition module, a computer, an emission optical fiber 3, an acquisition optical fiber 4, a sapphire window 5, a convex lens 6 and a depth finder;
the data port of the computer is electrically connected with the control port of the laser emitter, the laser emitter is provided with the emission optical fiber 3, the emission optical fiber 3 is arranged in the cavity of the drill bit 1, and the laser emitter is in light guide connection with the emission optical fiber 3;
the acquisition optical fiber 4 is arranged in the cavity of the drill bit 1, the acquisition optical fiber 4 is in photoelectric connection with the fluorescence detection module, and a data port of the fluorescence detection module is electrically connected with a data port of the data acquisition module;
the sapphire window 5 is embedded in the drill bit 1;
the convex lens 6 is embedded in the cavity of the drill bit 1;
the depth finder is embedded in the drill bit 1, and a data port of the depth finder is electrically connected with a data port of the data acquisition module;
the data port of the data acquisition module is electrically connected with the data port of the computer;
the transmitting optical fiber 3 is used for conducting laser emitted by the laser emitter, and the transmitting optical fiber 3 is also used for emitting the laser to the convex lens 6; the convex lens 6 is used for receiving laser emitted by the optical fiber, diverging the laser and sending the laser to the outside of the cavity of the drill bit 1 through the sapphire window 5; the collection fiber 4 is used to receive fluorescence from outside the cavity of the drill bit 1 through the sapphire window 5 into the cavity of the drill bit 1.
Also comprises a dyeing active carbon suspension 8 and a headspace bottle 9;
the 8 canning of dyeing active carbon suspension in headspace bottle 9, headspace bottle 9 is used for the canning 8 back-offs of dyeing active carbon suspension in sapphire window 5 is in order to measure out calibration curve.
The device also comprises a conductivity element 2 and a conductivity parameter acquisition module;
the conductivity element 2 is embedded in the drill bit 1, a data port of the conductivity element 2 is electrically connected with a data port of the conductivity parameter acquisition module, and a data port of the conductivity parameter acquisition module is electrically connected with a data port of the data acquisition module.
Example 3:
performing fluorescent dyeing treatment on the colloidal activated carbon suspension to form a dyed colloidal activated carbon suspension, and injecting the dyed colloidal activated carbon suspension into soil and underground water in a repair area in an injection mode;
before detection, a calibration experiment is carried out, wherein the calibration experiment adopts dyed colloidal activated carbon suspension liquid, the dyed colloidal activated carbon suspension liquid is filled in a headspace bottle (9), a bottle body is placed on a sapphire window (5) in a pouring mode, the corresponding fluorescence intensity is obtained by changing the concentration of the colloidal activated carbon suspension liquid, the linear relation between the concentration of the colloidal activated carbon and the fluorescence intensity is obtained through multiple experiments, and a calibration curve is obtained through fitting;
the detection method is based on a direct-push drilling machine, and a drill bit (1) penetrates into a designated point of an area where the dyed colloidal activated carbon suspension is injected;
the drill bit (1) 1 is connected with a depth finder, and depth information can be obtained in real time along with the depth of the drill bit (1) and is connected with a data acquisition system;
the bottom of the drill bit (1) is provided with a conductivity element (2) which is connected with a data acquisition system through an electric lead, so that the conductivity of soil layers with different depths can be detected, and a linear relation graph of the conductivity and the depth is provided;
the laser emitter emits laser through the emission optical fiber (3) at different depths, the dyed colloidal active carbon emits fluorescence after being irradiated by the laser, the fluorescence penetrates through the sapphire window (5), is refracted by the convex lens (6), is received by the acquisition optical fiber (4), and is transmitted to the fluorescence detection system;
the fluorescence detection system can obtain the concentration of the colloidal active carbon at a certain point position and a certain depth after carrying out data processing through a calibration curve according to the detected fluorescence signal;
the dyed colloidal activated carbon is detected at different depths, the concentration information of the colloidal activated carbon at all monitoring points in a certain detection range can be obtained, and a three-dimensional distribution map of the activated carbon in the high-density monitoring point range of the field is provided, so that the form of the colloidal activated carbon, namely the aggregation state or the dispersion state, is judged.
Example 4:
the fluorescence detection module carries on current fluorescence detection system, and the conductance parameter acquisition module carries on current conductance data acquisition system, and the computer passes through current laser control system control laser emitter, and data acquisition module carries on current data acquisition system.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for detecting colloidal activated carbon in soil or underground water is characterized by comprising the following specific steps:
selecting a detection range according to an injection region, selecting a plurality of detection point positions in the detection range, and selecting a plurality of depth point positions based on the soil depth at the detection point positions;
acquiring a fluorescence signal of the depth point location;
performing data processing on the fluorescence signal to obtain the active carbon concentration information of the depth point;
and acquiring the colloidal activated carbon concentration information of all the depth points in the detection range, generating a concentration information set, obtaining a three-dimensional graph about the distribution of the activated carbon in the detection range based on the concentration information set, and judging the form of the activated carbon to be in an aggregation state or a dispersion state through the three-dimensional graph.
2. The method of claim 1, wherein the colloidal activated carbon is detected in soil or groundwater, it is characterized in that the preparation method is characterized in that,
the acquisition method of the injection region comprises the following steps:
performing fluorescent dyeing on the activated carbon in the colloid form to obtain dyed activated carbon (7);
injecting the dyed activated carbon (7) into the land to be tested;
at the end of injection, the injection area is obtained after the dispersion and migration of the dyed activated carbon (7) in the soil are stabilized.
3. The method of claim 2, wherein the colloidal activated carbon is detected in soil or groundwater, it is characterized in that the preparation method is characterized in that,
the method for acquiring the fluorescence signal comprises the following steps:
use the drill of directly pushing away with drill bit (1) penetration appointed degree of depth position, laser emitter in drill bit (1) launches laser through launching optic fibre (3), dyeing active carbon (7) receive laser irradiation back and send fluorescence, fluorescence sees through sapphire window (5) and is received as fluorescence signal by gathering optic fibre (4) after convex lens (6) refract.
4. The method of claim 1, wherein the colloidal activated carbon is detected in soil or groundwater, it is characterized in that the preparation method is characterized in that,
the data processing comprises the following specific steps:
transmitting the fluorescence signal to a fluorescence detection system, wherein the fluorescence detection system obtains a fluorescence digital signal after AD conversion of the fluorescence signal, the fluorescence detection system transmits the fluorescence digital signal to a data acquisition system, and the data acquisition system transmits the concentration and depth information of the activated carbon to a computer; and the computer performs data processing on the fluorescence signal according to a calibration curve to obtain the active carbon concentration of the depth point position, and binds depth information corresponding to the active carbon concentration with the active carbon concentration to obtain the active carbon concentration information.
5. The method of claim 4, wherein the colloidal activated carbon is detected in soil or groundwater, it is characterized in that the preparation method is characterized in that,
the calibration curve is obtained through a calibration experiment, and the calibration curve obtaining method comprises the following steps:
carry out fluorescence dyeing with experimental colloidal activated carbon suspension and prepare for dyeing activated carbon suspension (8), will dyeing activated carbon suspension (8) are adorned in headspace bottle (9), will headspace bottle (9) are inverted on sapphire window (5), through changing experimental activated carbon concentration in the experimental colloidal activated carbon suspension obtains the fluorescence intensity that experimental activated carbon concentration corresponds, based on experimental activated carbon concentration the fluorescence intensity obtain experimental activated carbon concentration the linear relation of fluorescence intensity, through fitting the linear relation obtains the calibration curve.
6. The method for detecting colloidal activated carbon in soil or groundwater according to claim 4, wherein the depth information is obtained by the steps of:
the drill bit (1) is provided with a depth finder, the depth finder obtains the depth information in real time according to the depth of the drill bit (1) entering the soil, the depth finder sends the depth information to the data acquisition system, and the data acquisition system sends the depth information to a computer.
7. The method of claim 4, wherein the colloidal activated carbon is detected in soil or groundwater, it is characterized in that the preparation method is characterized in that,
further, the bottom of the drill bit (1) is provided with a conductivity element (2), the conductivity element (2) is used for detecting soil layer conductivity signals, the conductivity element (2) transmits the conductivity signals to a conductivity data acquisition system, the conductivity data acquisition system transmits the conductivity signals to the data acquisition system after AD (analog-to-digital) conversion is carried out on the conductivity signals, the data acquisition system transmits the conductivity information to the computer, and the computer obtains a linear relation graph of conductivity and depth according to the conductivity information and the depth information.
8. A device for detecting colloid activated carbon in soil or underground water is characterized in that,
the method comprises the following steps: the device comprises a drill bit (1), a fluorescence detection module, a laser transmitter, a data acquisition module, a computer, a transmitting optical fiber (3), an acquisition optical fiber (4), a sapphire window (5), a convex lens (6) and a depth finder;
the data port of the computer is electrically connected with the control port of the laser emitter, the laser emitter is provided with the emitting optical fiber (3), the emitting optical fiber (3) is arranged in the cavity of the drill bit (1), and the laser emitter is in light guide connection with the emitting optical fiber (3);
the acquisition optical fiber (4) is arranged in the cavity of the drill bit (1), the acquisition optical fiber (4) is in photoelectric connection with the fluorescence detection module, and a data port of the fluorescence detection module is electrically connected with a data port of the data acquisition module;
the sapphire window (5) is embedded in the drill bit (1);
the convex lens (6) is embedded in the cavity of the drill bit (1);
the depth finder is embedded in the drill bit (1), and a data port of the depth finder is electrically connected with a data port of the data acquisition module;
the data port of the data acquisition module is electrically connected with the data port of the computer;
the emission optical fiber (3) is used for conducting laser emitted by the laser emitter, and the emission optical fiber (3) is also used for emitting the laser to the convex lens (6); the convex lens (6) is used for receiving the laser emitted by the emitting optical fiber, diverging the laser and sending the laser to the outside of the cavity of the drill bit (1) through the sapphire window (5); the collecting optical fiber (4) is used for receiving fluorescence which is transmitted from the outside of the cavity of the drill bit (1) to the inside of the cavity of the drill bit (1) through the sapphire window (5).
9. The apparatus for detecting colloidal activated carbon in soil or groundwater according to claim 8,
also comprises a dyeing active carbon suspension (8) and a headspace bottle (9);
dyed activated carbon suspension (8) canning in headspace bottle (9), headspace bottle (9) are used for the canning back-off behind dyed activated carbon suspension (8) in sapphire window (5), the canning is in headspace bottle (9) dyed activated carbon suspension (8) are used for surveying and get calibration curve.
10. The apparatus for detecting colloidal activated carbon in soil or groundwater according to claim 8,
the device also comprises a conductivity element (2) and a conductivity parameter acquisition module;
the conductivity element (2) is embedded in the drill bit (1), a data port of the conductivity element (2) is electrically connected with a data port of the conductivity parameter acquisition module, and the data port of the conductivity parameter acquisition module is electrically connected with a data port of the data acquisition module.
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