CN1258079C - Method of sampling greenhouse gas by utilizing gas balance bag - Google Patents
Method of sampling greenhouse gas by utilizing gas balance bag Download PDFInfo
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- CN1258079C CN1258079C CN 200410017545 CN200410017545A CN1258079C CN 1258079 C CN1258079 C CN 1258079C CN 200410017545 CN200410017545 CN 200410017545 CN 200410017545 A CN200410017545 A CN 200410017545A CN 1258079 C CN1258079 C CN 1258079C
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Abstract
The present invention relates to a method for sampling greenhouse gas by utilizing a gas balance bag. The gas balance bag is arranged in an enclosed box used for measuring the exhaust gas flux of soil or plants, the gas balance bag is filled with right amount of air by small holes arranged on the enclosed box, the gas balance bag can expand to occupy certain volume in the enclosed box, and the gas is extracted and measured and a processing result is calculated according to a conventional method of a traditional enclosed box. The present invention adjusts the air pressure inside and outside the box to be consistent by the gas balance bag, the greenhouse exhaust gas flux of the soil or the plants can be really and accurately measured, and measurement errors of original position measurement and laboratory research are reduced.
Description
Technical field
The present invention relates to a kind of method of greenhouse gas emission flux measurement, be specifically related to a kind of method of utilizing the sampling of gas equilibrium bag to carry out the greenhouse gas emission flux measurement of soil or plant.Belong to the gas sampling technical field.
Background technology
It is one of research focus of current whole world concern that terrestrial climate warms, the N that mankind's activity produces
2O, CH
4Isothermal chamber gas is ascendant trend year by year, is the key factor that causes global greenhouse effect.According to Intergovernmental Panel on Climate Change (IPCC), in mankind's activity, the N that agricultural production and sewage disposal process produce
2O, CH
4Isothermal chamber gas comprises 19%.In more than 10 year, the flux mensuration that produces greenhouse gases about agricultural tillage, grassland, wetland, sewage disposal process is the focus of research greenhouse gases, and a large amount of relevant reports are arranged in the past.At the research process of greenhouse gases, measure emission flux of gas accurately whether, bring significant impact can for the emission flux and the decision-making reduction of discharging measure of assessment greenhouse gases.
About measuring the method for soil or plant emission flux of gas, what be widely used at present is traditional fully sheathed case method.The Chinese patent of applying for disclosed mensuration soil gas emission flux has: " a kind of method of measuring discharging quantity of gas from farmland greenhouse " (application number: 97111901.5), its principle mainly is to manage target soil or the plant casing with a sealing is covered, the gas that target soil or plant are produced is collected in the casing of certain volume fully, regularly, calculate the flux of greenhouse gases again with the gas concentration in the sampling thief sampling determination casing.
Traditional assay method of plant discharging greenhouse gases is by relatively soil---the object gas emission flux of botanical system and bare area soil is studied the gaseous emission contribution of plant in system.Apply for Chinese patent " dry crop directly discharges the field in-situ determination method of nitrous oxide the flux " (application number: 01127917.6) of disclosed mensuration plant emission flux of gas, change the traditional plant emission gases and measure thinking, be that the material of plant base stem portion with emissions object gas not coated and with film the soil around the basic stem covered, make the gas of the soil discharging under the target plant can not enter the casing that covers plant, adopt conventional fully sheathed case method to measure gas flux then.
Yet more than existing method all exists error bigger, can not accurately measure target soil, plant emission flux of gas.Cause a bigger common cause of resultant error to be: the gas sampling process has been ignored sampling loading pressure and the outer inconsistent problem of atmospheric pressure of case, makes sampling process can not truly reflect target soil or the plant gaseous emission rule under state of nature.To measure CH
4Be example, in traditional fully sheathed case method of sampling, each about 1 hour of sampling time.The CH that in fully sheathed case, discharges with soil
4Gas flow increases, and makes CH in the case
4Concentration (CH
4Dividing potential drop) rises gradually, cause total air pressure (CH in the case
4Dividing potential drop and atmospheric pressure sum) greater than the outer atmospheric pressure of case.This pressure reduction is particularly evident at the later stage and the big sampled point of greenhouse gas emission flux of sampling, the soil discharging CH that consequently fully sheathed case covered
4Be suppressed, the speed of emission gases reduces in case, is not the true reflection of original-state soil to airborne release greenhouse gases speed.Another error is to occur in the moment of sampling.With the moment of special-purpose gas production bottle or the about 200ml gas of syringe extraction, because the air pressure outside the case, impels soil unusual discharging CH in case greater than the case internal gas pressure
4Gas can not truly reflect the gaseous emission speed of soil.
The basic reason that produces above error is the inside and outside gaseous tension imbalance of sampling box, makes the drainage rate of soil or plant acceleration (or slowing down) greenhouse gases, causes the error at measurment of soil or plant greenhouse emission flux of gas.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of method of utilizing gas equilibrium bag sampling to carry out the greenhouse gas emission flux measurement is provided, can the inside and outside gas equilibrium of automatic control stuff box, reduce the gas sampling error.
For realizing such purpose, the present invention is provided with a gas equilibrium bag in the fully sheathed case of measuring soil or plant discharging gas flux, fill an amount of air for the gas equilibrium bag with special-purpose air pump by the aperture of opening on the fully sheathed case, make the expansion of gas equilibrium bag and occupy certain volume in the fully sheathed case, then by traditional fully sheathed case conventional method extracting gases, mensuration, computing result.The gas equilibrium bag can be consistent by the regulating box inner and outer air pressure, thereby realizes accurately measuring the greenhouse gas emission flux of soil or plant.
Method of the present invention is specific as follows:
1, is manufactured with the sampling box of gas equilibrium bag: the aperture of on the common closed box of gathering gas, opening an about 5-10mm, with the openend of gas equilibrium bag by stretching out in the case outside case, and be fixed on the tank wall of fully sheathed case tapping, keep the gas in the polybag to communicate with atmosphere by perforate.The gas equilibrium bag can adopt common plastic film to make, and size is: 50 * 100mm, film thickness is: 0.5～1.5mm.
2, before fully sheathed case covers target soil or plant, with hand air pump or blow up a balloon and fill an amount of air in the case gas equilibrium bag, make the gas equilibrium bag be expanded to about 2/3rds volumes and get final product by the perforate on the fully sheathed case.
3, extracting gases, analysis, calculating obtain the result of the greenhouse gas emission flux of target soil or plant.
In gas production mensuration process, when in the fully sheathed case since the greenhouse gases of soil or plant discharging cause the case internal gas pressure greater than case outside during atmospheric pressure, the gas equilibrium bag is extruded and dwindles, get rid of air in a certain amount of bag by the aperture of opening on the fully sheathed case, promptly be consistent by the air pressure inside and outside the gas equilibrium bag regulating box in the case.And in the moment with the sampling needle sampling, when the sealing loading pressure reduces, the outer air of fully sheathed case can enter the gas equilibrium bag in the case by the aperture on the fully sheathed case, and the case inner and outer air pressure is consistent, and avoids the speed moment increasing of soil or plant emission gases in case.
The present invention realizes easily, simple to operate, can measure the flux of soil or plant discharging greenhouse gases truly, exactly, reduce the error at measurment of in-site detecting and laboratory study, can be used for assessing the flux that physical environment, agricultural, industry and sewage treatment project produce greenhouse gases, instruct and produce and research.
Description of drawings
Fig. 1 is the sampling box structural representation of the band gas equilibrium bag of the present invention's employing.
Among the figure, 1 is gas sample tube, and 2 is the sampling box casing, and 3 is aperture, and 4 is the gas equilibrium bag.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
The sampling box of the band gas equilibrium bag that the present invention adopts as shown in Figure 1, sampling box is made up of gas sample tube 1, the sampling box casing 2 that has aperture 3, gas equilibrium bag 4.
Embodiment: polluted water land processing procedure soil produces the flux of greenhouse gases and measures
1, is manufactured with the sampling box of gas equilibrium bag
Be made into the body structure of 300 * 300 * 400mm with the thick organic glass of 5mm, the top is provided with the tracheae of gas production, open the aperture of an about 8mm at tank wall, (size is: 50 * 100mm with a polybag, film thickness is: openend 1.0mm) is by stretching out in the case outside case, stick with glue agent then the film of the openend of polybag is fixed on the tank wall of fully sheathed case tapping, keep the gas in the polybag to communicate with atmosphere by perforate;
2, before fully sheathed case covers the soil of disposing of sewage, fill air for the case inner plastic bag with blowing up a balloon by the perforate on the fully sheathed case, make polybag be expanded to about 2/3rds volumes and get final product;
3, with above sealing case lid on the soil that needs are measured, base inserts soil 50mm;
4, press designing requirement with sampling needle, every 15 minutes extracting gases samples once, with the N in the chromatography of gases analytic sample
2O, CH
4, obtain the flux of sewage disposal system soil emission greenhouse gas.
In gas production mensuration process, when in the fully sheathed case since the greenhouse gases of soil or plant discharging cause the case internal gas pressure greater than case outside during atmospheric pressure, the gas equilibrium bag is extruded and dwindles, and gets rid of air in a certain amount of bag by the aperture of opening on the fully sheathed case, and the inside and outside air pressure of regulating box is consistent.And in the moment with the sampling needle sampling, when the sealing loading pressure reduced, the outer air of fully sheathed case can enter the gas equilibrium bag in the case by the aperture on the fully sheathed case, and the case inner and outer air pressure is consistent.The present invention can measure the flux of soil or plant discharging greenhouse gases truly, exactly, reduces the error at measurment of in-site detecting and laboratory study.
Claims (1)
1, a kind of method of utilizing the sampling of gas equilibrium bag to carry out the greenhouse gas emission flux measurement, it is characterized in that on the closed box of gathering gas, opening the aperture of a 5-10mm, with size is 50 * 100mm, film thickness is that the openend of gas equilibrium bag of 0.5～1.5mm is by stretching out in the case outside case, and be fixed on the tank wall of fully sheathed case tapping, keep the gas in the gas equilibrium bag to communicate with atmosphere by perforate, before fully sheathed case covers target soil or plant, give gas equilibrium bag filling air in the case by the perforate on the fully sheathed case, make the gas equilibrium bag be expanded to 2/3rds volumes, extracting gases according to a conventional method then, analyze, calculate, obtain the result of the greenhouse gas emission flux of target soil or plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017545 CN1258079C (en) | 2004-04-08 | 2004-04-08 | Method of sampling greenhouse gas by utilizing gas balance bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017545 CN1258079C (en) | 2004-04-08 | 2004-04-08 | Method of sampling greenhouse gas by utilizing gas balance bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563932A CN1563932A (en) | 2005-01-12 |
| CN1258079C true CN1258079C (en) | 2006-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410017545 Expired - Fee Related CN1258079C (en) | 2004-04-08 | 2004-04-08 | Method of sampling greenhouse gas by utilizing gas balance bag |
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| CN (1) | CN1258079C (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839840A (en) * | 2010-04-09 | 2010-09-22 | 南京化工职业技术学院 | Plant monitor for indoor air |
| CN102252876B (en) * | 2011-06-13 | 2013-03-27 | 浙江省农业科学院 | Buffer type soil gas sampling device |
| CN105258982B (en) * | 2015-09-21 | 2017-11-24 | 浙江省农业科学院 | Nonirrigated farmland gas collector |
| CN105866275A (en) * | 2016-04-05 | 2016-08-17 | 济宁神农画圆生态系统模式推广有限公司 | Method and device for quantitative analysis on nitrogen-oxygen absorption capacity of nitrogen-fixing bacteria in sealed container |
| CN105973652A (en) * | 2016-06-30 | 2016-09-28 | 东莞市升微机电设备科技有限公司 | Closed-cabin sampling system |
| CN106248880B (en) * | 2016-08-08 | 2018-09-28 | 东莞市升微机电设备科技有限公司 | Smell, VOC and floating harmful substance with External Circulation Filtration Apparatus detect cabin |
| CN106093311B (en) * | 2016-08-08 | 2019-03-19 | 北京市产品质量监督检验院 | Smell, VOC and floating harmful substance test device |
| CN106093312B (en) * | 2016-08-08 | 2019-04-12 | 东莞市升微机电设备科技有限公司 | Smell, VOC and floating harmful substance with illumination test function detect cabin |
| CN106525135A (en) * | 2016-11-30 | 2017-03-22 | 中国科学院大气物理研究所 | Enclosed type automatic observation box for substance flux |
| CN106770933B (en) * | 2016-11-30 | 2019-04-23 | 中国科学院大气物理研究所 | The system and method for box method species flux automatic Observation |
| CN107328633B (en) * | 2017-07-27 | 2024-04-02 | 防灾科技学院 | Degassing device and application thereof |
| CN108489845B (en) * | 2018-03-01 | 2020-03-27 | 四川大学 | Method for measuring flood discharge atomization concentration of dam by bagging and weighing |
| CN108594915B (en) * | 2018-06-27 | 2023-08-29 | 东莞市升微机电设备科技有限公司 | Volume-adjustable closed chamber and control method |
| CN109374366B (en) * | 2018-11-07 | 2022-02-15 | 中国科学院东北地理与农业生态研究所 | Volume-variable soil gas collection device and using method thereof |
| CN110501192B (en) * | 2019-08-21 | 2020-09-25 | 中国水利水电科学研究院 | Constant-temperature and airtight soil respiration collection device |
| CN114441242B (en) * | 2020-11-02 | 2024-05-07 | 中国石油化工股份有限公司 | Gas collecting bottle and use method and application thereof |
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- 2004-04-08 CN CN 200410017545 patent/CN1258079C/en not_active Expired - Fee Related
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