CN115824870A - Detection method for carbon sequestration of farmland soil - Google Patents
Detection method for carbon sequestration of farmland soil Download PDFInfo
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- CN115824870A CN115824870A CN202310112915.0A CN202310112915A CN115824870A CN 115824870 A CN115824870 A CN 115824870A CN 202310112915 A CN202310112915 A CN 202310112915A CN 115824870 A CN115824870 A CN 115824870A
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- 239000002689 soil Substances 0.000 title claims abstract description 201
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 230000009919 sequestration Effects 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 title claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 152
- 239000007789 gas Substances 0.000 claims abstract description 88
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 37
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 37
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 238000011049 filling Methods 0.000 claims abstract description 17
- 239000012153 distilled water Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000010419 fine particle Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 5
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- 238000007254 oxidation reaction Methods 0.000 claims description 44
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- 238000012360 testing method Methods 0.000 claims description 15
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- 230000008569 process Effects 0.000 claims description 6
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- 230000008859 change Effects 0.000 claims description 4
- ZPLCXHWYPWVJDL-UHFFFAOYSA-N 4-[(4-hydroxyphenyl)methyl]-1,3-oxazolidin-2-one Chemical compound C1=CC(O)=CC=C1CC1NC(=O)OC1 ZPLCXHWYPWVJDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052756 noble gas Inorganic materials 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004821 distillation Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 55
- 238000007789 sealing Methods 0.000 description 17
- 238000010438 heat treatment Methods 0.000 description 12
- 239000005431 greenhouse gas Substances 0.000 description 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 9
- 229910001882 dioxygen Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a detection method for farmland soil carbon sequestration, which comprises the following steps: step 1) collecting soil in a farmland, drying the soil in the sun, weighing the soil, grinding the soil into fine particles, and then putting the soil into distilled water for dissolving; step 2), filtering out particle impurities from the dissolved soil particles through a filter screen; step 3) drying the soil particles by distillation to enable the soil particles to be fine powder particles; step 4), placing soil particles in a container, adding a charged particle catalyst, and enabling the soil particles and the particle catalyst to be adhered together in a suspended manner; step 5) vacuumizing the container, and filling oxygen into the container to burn soil particles in the container; step 6) detecting the mass of the carbon dioxide gas, and dividing the mass of the carbon dioxide gas by the mass ratio of the weighed soil to obtain the solid carbon ratio of the soil, wherein the method has the beneficial effects that: the carbon sequestration in the soil can be known by dividing the mass of the carbon dioxide gas oxidized by the soil particles by the weighed soil mass.
Description
Technical Field
The invention relates to the technical field of energy-saving and environment-friendly detection, in particular to a detection method for carbon sequestration of farmland soil.
Background
The farmland is CO 2 、CH 4 And N 2 The important emission sources of the three greenhouse gases O contribute about 14 percent of artificial greenhouse gas emission in agricultural production activities in the global range, and unreasonable farmland management measures strengthen the emission sources of the greenhouse gases in the farmland. Weakening the carbon fixation function of the farmland. Soil plus or minusCarbon reservoirs are one of the most active carbon reservoirs in the earth's ecosystem and are also an important source of greenhouse gases. Research shows that reasonable farmland management measures are adopted, so that the purposes of increasing soil carbon reservoirs and reducing the emission of greenhouse gases can be achieved, and the soil quality can be improved. The farmland soil carbon reservoir is affected by temperature, precipitation and vegetation type. But also greatly influenced by farmland management measures such as fertilizing amount, fertilizer types, straw returning amount, farming measures, irrigation and the like.
As the straws are returned to the field, fertilizer is applied, chemical elements are discharged to the soil by crops, the elements in the soil can flow into the air, measures for reducing the loss of the elements in the farmland soil into the air are required to be searched on the measures of farmland management along with the change of land utilization, the elements in the farmland soil also comprise elements generating greenhouse gases, the loss of the elements in the farmland soil into the air is reduced, and the possibility that the elements generating the greenhouse gases in the farmland soil are discharged into the air to generate chemical reaction with the elements in the air to form the greenhouse gases is also reduced. The method for fixing the carbon in the farmland soil is used for reducing the emission of greenhouse gas elements in the farmland soil when the greenhouse gas elements generated in the farmland soil are emitted into the air, and the carbon fixation of the farmland soil is needed when the greenhouse gas elements in the farmland soil are emitted into the air.
Disclosure of Invention
The invention aims to solve the technical problem of how to detect the carbon sequestration in farmland soil, and aims to provide a method for detecting the carbon sequestration in the farmland soil.
The invention is realized by the following technical scheme:
a detection method for farmland soil carbon sequestration comprises the following steps:
step 1) collecting soil in a farmland, drying the soil in the sun and weighing the soil mass, grinding the dried soil into 10-mesh fine particles, and putting the fine particle soil into distilled water for stirring;
step 2) filtering soil particles in the distilled water by a filter screen to remove particle impurities larger than 20 meshes;
step 3) evaporating soil particles in the distilled water to dryness, and spreading the soil particles to enable the soil particles to be fine powder particles;
step 4) placing the fine powder granular soil particles in a container, adding a charged particle catalyst into the container, filling rare gas into the container to blow the soil particles and the particle catalyst in the container so as to enable the soil particles and the particle catalyst to be suspended in the container, and enabling the suspended soil particles and the particle catalyst to be adhered together;
step 5) vacuumizing the container to enable the soil particles to be still in the container, filling oxygen into the container to enable the soil particles to flow and burn in the container, and oxidizing the soil particles to generate carbon dioxide gas;
and 6) pumping the carbon dioxide gas in the container out of the container, detecting the mass of the carbon dioxide gas, and dividing the mass of the carbon dioxide gas by the ratio of the weighed soil mass to obtain the solid-carbon ratio of the soil.
Specifically, in step 5), the soil particles are suspended in the container, the burning device is started to suspend and burn the soil particles in the container, and carbon elements in the soil particles are oxidized into carbon dioxide gas.
And in the burning oxidation process of the soil particles, continuously filling oxygen into the container, wherein the filling volume of the oxygen is 0.15-0.02L/min, so that the soil particles flow and are oxidized in the oxidation process.
The burning time of the soil particles suspended in the container is 5-8min, so that the soil particles are red after being burned in the container.
In step 4), the particulate catalyst is positively charged Cu 2+ Or Fe 2+ The gas filling volume of the rare gas is 0.5-0.8L/min to blow the soil particles and the particle catalyst in the container.
The filling volume of the rare gas is gradually increased from 0.5L/min to 0.8L/min within 1min, and the container is filled with the rare gas.
In step 6), the carbon dioxide gas in the container is filtered and extracted from the container through impurities.
The carbon fixation ratio of the soil is obtained by 5 times of tests, and the standard difference value of the carbon fixation ratio of the soil obtained by 5 times of tests is
And the carbon fixation ratio of each soil in 5 measurements is
The average soil carbon fixation ratio of 5 measurements is
Standard deviation of the carbon/solid ratio of soil
The following formula is obtained:
measuring standard difference value of carbon fixation ratio of soil
The difference significance is tested by adopting an analysis tool library of Excel software, and the standard difference value of the carbon-fixing ratio of the soil is
And comparing and analyzing the carbon fixation ratio Xi of the soil at each time.
In step 3), the soil particles in the distilled water are put into a ceramic evaporating dish and evaporated to dryness, and each soil particle after evaporation to dryness is mutually dispersed without adhesion.
In step 6), the extracted carbon dioxide gas can be filled into a test tube, a bromothymol blue indicator is filled in the test tube, and the degree of color change of the carbon dioxide gas in the test tube is observed.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention mainly utilizes soil particles in an oxidation device (container) to enable the soil particles to be in a dispersing oxidation device through rare gas, charged particle catalysts are positively charged particles, the rare gas enables the charged particle catalysts to be adhered to each soil particle through the effect of charging, each soil particle is positively charged, each soil particle is mutually repelled and cannot be contacted due to the fact that each soil particle is positively charged, therefore, each soil particle in the fine powder particles can be completely oxidized in the container, carbon dioxide gas generated after each soil particle is oxidized is extracted, and the carbon dioxide gas mass ratio of the soil is obtained through weighing the ratio of the extracted carbon dioxide gas mass to the dried soil mass.
2. The high-temperature resistance heating rod (burning device) provided by the invention can be used for fully burning and oxidizing each soil particle in the oxidation device (container) so as to fully burn each soil particle in the container, each soil particle can be burned by the burning device under the condition that collision and bonding cannot occur among each soil particle, and each soil particle can be fully burned and oxidized.
3. The invention is that after oxygen is introduced into the container, a small amount of oxygen is continuously filled into the container to enable each soil particle to continuously flow in the container, each flowing soil particle is enabled to always flow in the container through the burning device and to be burned by the flowing soil to completely oxidize carbon elements in each soil particle into carbon dioxide gas, and the soil particles are burned to red in the container to enable the soil particles to be completely oxidized into the carbon dioxide gas when the soil particles flow and are burned in the container.
4. The high-temperature resistance heating rod burns red, each soil particle flows in the container, the flowing of each soil particle can touch the high-temperature resistance heating rod, and the high temperature of the high-temperature resistance heating rod burns each flowing soil particle.
5. According to the invention, the aperture of the first through hole is larger than that of the second through hole, so that the flow speed of the lower fluid tank flowing into the upper fluid tank is reduced, but the fluid pressure in the lower fluid tank is smaller than that in the upper fluid tank, the fluid pressure in the upper fluid tank is increased, the temperature in the upper fluid tank is further increased, and oxygen entering the upper fluid tank from an air source can be oxidized with carbon element particles more quickly.
6. The aeration volume of the rare gas is gradually increased, and the container is filled with the rare gas, so that the adhesion between the fine powder granular soil particles and the charged particle catalyst is accelerated and fully adhered.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a view showing the construction of a using device of the present invention;
FIG. 2 is a perspective view of the internal assembly of the oxidation apparatus of the present invention;
FIG. 3 is a sectional view of the inside assembly of the oxidation apparatus according to the present invention;
FIG. 4 is a flow chart of a method of the present invention;
reference numbers and corresponding part names in the drawings:
1-auxiliary gas supply structure, 2-telescopic air bag, 3-first gas pipe, 4-first pressure meter, 5-first diaphragm valve, 6-main gas supply mechanism, 7-one-way valve, 8-second diaphragm valve, 9-oxidation device, 10-lower fluid tank, 11-upper fluid tank, 12-second pressure meter, 13-feeding port, 14-high temperature resistance heating rod, 15-second gas pipe, 16-third diaphragm valve, 17-turbo pump, 18-lower sealing cover, 181-first through hole, 19-diaphragm sheet, 20-upper sealing cover and 201-second through hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a detection apparatus for carbon sequestration in farmland soil, for detecting carbon sequestration in farmland soil, including: the device comprises an auxiliary gas supply structure 1, a main gas supply mechanism 6, an oxidation device 9 and a turbo pump 17, wherein the main gas supply mechanism 6 is communicated with the auxiliary gas supply structure 1 through a gas pipe and is used for mixing gas of the auxiliary gas supply structure 1, the oxidation device 9 is used for oxidizing carbon element particles to enable the carbon element particles to be combined with oxygen to generate carbon dioxide gas, the oxidation device 9 (oxidation tank) is provided with a lower fluid tank 10 and an upper fluid tank 11, the lower fluid tank 10 is connected with the upper fluid tank 11 in a sealing mode through threads, the turbo pump 17 is communicated with the lower fluid tank 10 and is used for conveying fluid to the lower fluid tank 10, a high-temperature resistance heating rod 14 (an electrically heated metal resistor) is arranged on the upper fluid tank 11, an insulating section of the high-temperature resistance heating rod 14 is embedded on the side wall of the upper fluid tank 11, a metal section of the high-temperature resistance heating rod 14 extends into the upper fluid tank 11, and the high-temperature resistance heating rod 14 outside the upper fluid tank 11 is connected with a power supply.
The auxiliary gas supply structure 1 is provided with a telescopic airbag 2, the telescopic airbag 2 is connected to a first diaphragm valve 5 through a first gas pipe 3, the first gas pipe 3 is connected to a first pressure gauge 4 to detect the gas pressure in the telescopic airbag 2, the first diaphragm valve 5 is communicated to the upper fluid tank 11 through a one-way valve 7, and the auxiliary gas supply structure 1 is mainly used for assisting to supply oxygen to the oxidation device 9, such as: when the second diaphragm valve 8 is closed or the air source connected with one end of the second diaphragm valve 8 is insufficient, the first diaphragm valve 5 is opened to lead the air in the telescopic air bag 2 to the oxidation device 9.
The main gas supply mechanism 6 is provided with a second diaphragm valve 8, one end of the second diaphragm valve 8 is connected with a gas source, the other end of the second diaphragm valve 8 is communicated with an upper fluid tank 11 through a one-way valve 7, the upper fluid tank 11 is connected with a second pressure gauge 12 which is mainly used for detecting the pressure in the oxidation device 9, and the main gas supply mechanism 6 is a main ventilation gas source.
The feeding port 13 is opened on the upper fluid tank 11 to facilitate feeding the material into the oxidation device 9, and the second air pipe 15 is positioned at the lower end of the lower fluid tank 10.
The turbo pump 17 is connected to the inside of the lower fluid tank 10 through a third diaphragm valve 16 and a second air pipe 15, and the second air pipe 15 is connected to the inside of the lower fluid tank 10 at the lower end of the lower fluid tank 10.
As shown in fig. 2 to 3, the inner circumferential wall of the upper fluid tank 11 has an internal thread, the outer circumferential wall of the lower fluid tank 10 has an external thread, and an increased material zone is provided between the internal thread of the upper fluid tank 11 and the external thread of the lower fluid tank 10, and the increased material zone sealingly connects the upper fluid tank 11 and the lower fluid tank 10 in combination with a threaded connection.
The lower fluid tank 10 and the upper fluid tank 11 are integrally provided with a lower sealing cover 18 and an upper sealing cover 20, the inner peripheral wall of the lower fluid tank 10 is provided with internal threads, the outer peripheral walls of the lower sealing cover 18 and the upper sealing cover 20 are provided with external threads, the lower sealing cover 18 and the upper sealing cover 20 are connected in the lower fluid tank 10 through threads, the lower sealing cover 18 is positioned at the lower side of the upper sealing cover 20, a diaphragm sheet 19 is arranged between the lower sealing cover 18 and the upper sealing cover 20, the diaphragm sheet 19 can pass through particle particles below 2 micrometers (the size of the carbon particle soil particles is in the range of 4-10um, and the size of the soil particles after combustion is also about 3 um), and the diaphragm sheet 19 is clamped between the lower sealing cover 18 and the upper sealing cover 20.
The lower sealing cover 18 is provided with a first through hole 181, the upper sealing cover 20 is provided with a second through hole 201, the first through hole 181 is communicated with the second air pipe 15, the second through hole 201 is communicated with the first air pipe 3 communicated with the inside of the upper fluid tank 11, and the aperture of the first through hole 181 is larger than that of the second through hole 201.
Example 2
As shown in fig. 1 to 3, the main gas supply means 6 of the present invention is mainly used for supplying pure oxygen, and the check valve 7 is mainly used for preventing the backflow or backflow of oxygen in the auxiliary gas supply means 1 and the main gas supply means 6. The turbo pump 17 is mainly used for introducing a rare gas into the oxidation device 9, for extracting the rare gas, or for extracting carbon dioxide oxidized in the oxidation device 9.
The feeding port 13 is used for feeding materials (fine powder granular soil particles and charged particle catalysts) into the oxidation device 9, after the materials are fed into the oxidation device 9, the feeding port 13 can be blocked by a plug, the oxidation device 9 is vacuumized, gas is pumped by the action of the turbo pump 17, the fine powder granular soil particles and the charged particle catalysts are enabled to be on the upper end face of the diaphragm 19 by the diaphragm 19, substances (fine powder granular soil particles) in the oxidation device 9 are oxidized to form oxidized gas and residue is remained, when the oxidized carbon dioxide gas in the oxidation device 9 is pumped by the turbo pump 17, the carbon dioxide gas can penetrate through the diaphragm 19 and be discharged by the turbo pump 17, the residue can be filtered on the diaphragm 19, the residue on the upper end face of the diaphragm 19 is prevented from flowing into the second air pipe 15, and the diaphragm 19 can be taken out by disassembling the fluid tank 10 and the upper fluid tank 11.
The material is fed into the oxidation device 9 from the feed inlet 13, so that the barrier effect of the membrane 19 prevents the material from flowing into the second gas pipe 15.
Example 3
As can be seen from fig. 2 to 3, the larger diameter of the first through hole 181 than the second through hole 201 reduces the flow rate of the fluid flowing from the lower fluid tank 10 into the upper fluid tank 11, but the fluid pressure in the lower fluid tank 10 is lower than the fluid pressure in the upper fluid tank 11.
The pressure increase in the upper fluid tank 11 further raises the temperature in the upper fluid tank 11, and oxygen from the gas source entering the upper fluid tank 11 can be more rapidly oxidized with elemental carbon particles.
Example 4
As shown in FIG. 1, the oxygen gas from the oxygen source can be introduced into the oxidation device 9 by opening the second diaphragm valve 8, the oxygen gas in the oxidation device 9 is generally supplied by the main gas supply mechanism 6, the first diaphragm valve 5 can be opened when the second diaphragm valve 8 is closed or the oxygen gas is not supplied, the telescopic gasbag 2 is compressed to make the oxygen gas flow into the oxidation device 9, and since the oxygen gas in the telescopic gasbag 2 is at normal temperature but the volume in the oxidation device 9 is unchanged, the oxygen gas in the telescopic gasbag 2 flows into the oxidation device 9 to increase the oxygen gas in the oxidation device 9 and is compressed in the oxidation device 9, and the temperature of the oxygen gas in the oxidation device 9 is also increased to oxidize the carbon element particles.
As can be seen from fig. 1, the check valve 7 prevents the backflow of the fluid, allowing the fluid inside the oxidation device 9 to be compressed.
Example 5
As shown in fig. 1, the auxiliary gas supply structure 1 and the main gas supply structure 6 both supply oxygen to the oxidation device 9, the turbo pump 17 pumps rare gas into the oxidation device 9 or pumps out rare gas (helium or argon), and the turbo pump 17 also pumps out carbon dioxide in the oxidation device 9.
Example 6
With reference to the foregoing embodiment, as shown in fig. 4, the present embodiment provides a method for detecting carbon sequestration in farmland soil, including the following steps:
step 1) collecting soil in a farmland, drying the soil in the sun and weighing the soil, grinding the dried soil into 10-mesh fine particles, and putting the fine particle soil into distilled water for stirring;
step 2) filtering soil particles in the distilled water by a filter screen to remove particle impurities larger than 20 meshes;
step 3) evaporating soil particles in the distilled water to dryness, and spreading the soil particles to enable the soil particles to be fine powder particles;
step 4) placing the fine powder granular soil particles in a container (an oxidation device 9), adding a charged particle catalyst (which is put in through a feeding port 13) into the container, filling rare gas (which is acted by a turbine pump 17) into the container to blow the soil particles and the particle catalyst in the container so that the soil particles and the particle catalyst are suspended in the container, and the suspended soil particles and the particle catalyst are adhered together in a suspended manner;
step 5) vacuumizing the container (through the action of a turbine pump 17) to enable the soil particles to be still in the container, filling oxygen into the container (supplied by a main gas supply mechanism 6) to enable the soil particles to flow and burn in the container, and oxidizing carbon elements in the soil particles to generate carbon dioxide gas;
and 6) pumping the carbon dioxide gas in the container out of the container (through the action of a turbine pump 17), detecting the mass of the carbon dioxide gas, and dividing the mass of the carbon dioxide gas by the ratio of the weighed soil mass to obtain the solid carbon ratio of the soil.
Specifically, in step 5), the soil particles are suspended in the container, the burning device (high-temperature resistance heating rod 14) is started to make the soil particles flow in the container and burn the soil particles, and carbon elements in the soil particles are oxidized into carbon dioxide gas.
And in the burning oxidation process of the soil particles, continuously filling oxygen into the container, wherein the filling volume of the oxygen is 0.15-0.02L/min, so that the soil particles flow and are oxidized in the oxidation process.
The burning time of the soil particles suspended in the container is 5-8min, so that the soil particles are red after being burned in the container.
In step 4), the particulate catalyst is positively charged Cu 2+ Or Fe 2+ The gas filling volume of the rare gas is 0.5-0.8L/min to blow the soil particles and the particle catalyst in the container.
The filling volume of the rare gas is gradually increased from 0.5L/min to 0.8L/min within 1min, and the container is filled with the rare gas.
In step 6), the carbon dioxide gas in the container is filtered and extracted from the container through impurities.
The carbon fixation ratio of the soil is obtained by 5 times of tests, and the standard difference value of the carbon fixation ratio of the soil obtained by 5 times of tests is
And the carbon fixation ratio of each soil in 5 measurements is
The average soil carbon fixation ratio of 5 measurements is
Standard deviation of the carbon/solid ratio of soil
The following formula is obtained:
measuring standard difference value of carbon fixation ratio of soil
The difference significance is tested by adopting an analysis tool library of Excel software, and the standard difference value of the carbon-fixing ratio of the soil is
And comparing and analyzing with the carbon fixation ratio Xi of soil at each time.
In step 3), the soil particles in the distilled water are put into a ceramic evaporating dish to be dried, and each soil particle after being dried is mutually dispersed without adhesion.
In step 6), the extracted carbon dioxide gas can be filled into a test tube, a bromothymol blue indicator is filled in the test tube, and the degree of color change of the carbon dioxide gas in the test tube is observed.
Example 7
The invention mainly utilizes the soil particles in an oxidation device 9 to lead the soil particles to pass through rare gas so as to lead the soil particles to be in a dispersing oxidation device 9, and the charged particle catalyst is Cu with positive charge 2+ Or Fe 2+ The noble gas also causes the charged particle catalyst to adhere to each soil particle by the action of the charge, and each soil particle is positively charged, and each soil particle is repelled from contact because each soil particle is positively charged.
The high-temperature resistance heating rod 14 is heated and burned to be red, each soil particle in the oxidation device 9 is sufficiently burned in a flowing state, and each soil particle is burned by a heat source of the high-temperature resistance heating rod 14 under the condition that collision and bonding between each soil particle are not generated.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A detection method for farmland soil carbon sequestration is characterized by comprising the following steps:
step 1) collecting soil in a farmland, drying the soil in the sun and weighing the soil, grinding the dried soil into 10-mesh fine particles, and putting the fine particle soil into distilled water for stirring;
step 2) filtering out particle impurities larger than 20 meshes from soil particles in the distilled water through a filter screen;
step 3) evaporating soil particles in the distilled water to dryness, and spreading the soil particles to enable the soil particles to be fine powder particles;
step 4) placing the fine powder granular soil particles in a container, adding a charged particle catalyst into the container, filling rare gas into the container to blow the soil particles and the particle catalyst in the container so as to enable the soil particles and the particle catalyst to be suspended in the container, and enabling the suspended soil particles and the particle catalyst to be adhered together;
step 5) vacuumizing the container to enable the soil particles to be still in the container, filling oxygen into the container to enable the soil particles to flow and be burned in the container, and oxidizing the soil particles to generate carbon dioxide gas;
and 6) pumping the carbon dioxide gas in the container out of the container, detecting the mass of the carbon dioxide gas, and dividing the mass of the carbon dioxide gas by the ratio of the weighed soil mass to obtain the solid-carbon ratio of the soil.
2. The method for detecting carbon sequestration in farmland soil as claimed in claim 1, wherein in step 5), the soil particles are suspended in the container, the burning device is started to suspend and burn the soil particles in the container, and carbon elements in the soil particles are oxidized into carbon dioxide gas.
3. The method for detecting carbon sequestration in farmland soil as claimed in claim 2, wherein during the burning oxidation process of the soil particles, the container is continuously charged with oxygen, and the charging volume of the oxygen is 0.15-0.02L/min, so that the soil particles flow and oxidize during the oxidation process.
4. The method for detecting farmland soil carbon sequestration as claimed in claim 2, wherein the soil particles are suspended in the container for a burning time of 5-8min to cause the soil particles to burn red in the container.
5. The method for detecting carbon sequestration in farmland soil as claimed in claim 1, wherein in the step 4), the particle catalyst is Cu with positive charge 2+ Or Fe 2+ The gas filling volume of the rare gas is 0.5-0.8L/min to blow the soil particles and the particle catalyst in the container.
6. The method for detecting carbon sequestration in farmland soils as claimed in claim 5, wherein said container is filled with a noble gas by increasing the filling volume of said noble gas from 0.5L/min to 0.8L/min within 1 min.
7. The method for detecting the carbon sequestration in the farmland soil as claimed in claim 1, wherein in the step 6), the carbon dioxide gas in the container is filtered and extracted by impurities.
8. The method for detecting carbon sequestration in farmland soil as claimed in claim 7, wherein the carbon sequestration ratio of the soil is obtained by performing 5 tests, and the standard deviation of the carbon sequestration ratio of the soil obtained by the 5 tests is
And the carbon fixation ratio of each soil in 5 measurements is
The average soil carbon fixation ratio of 5 measurements is
Standard deviation of the carbon/solid ratio of soil
The following formula is obtained:
measuring standard difference value of carbon fixation ratio of soil
The difference significance is tested by adopting an analysis tool library of Excel software, and the standard difference value of the carbon-fixing ratio of the soil is
And comparing and analyzing with the carbon fixation ratio Xi of soil at each time.
9. The method for detecting farmland soil carbon sequestration as claimed in claim 1, wherein in step 3), the soil particles in the distilled water are put into a ceramic evaporating dish and evaporated to dryness, and each evaporated soil particle is dispersed without adhesion.
10. The method for detecting carbon sequestration in farmland soil as claimed in claim 1, wherein in step 6), the extracted carbon dioxide gas can be filled into a test tube, and a bromothymol blue indicator is filled in the test tube to observe the degree of color change of the carbon dioxide gas in the test tube.
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