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A gas sampling system and monitoring method for monitoring CO2 movement process between atmosphere and soil

A gas sampling and soil technology, applied in the field of soil environmental testing

Active Publication Date: 2016-01-27
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no effective method to directly prove that soil has the ability to absorb CO 2 The role of gases, especially involving soil adsorption of CO 2 The amount of gas and the adsorbed CO 2 There are few studies on the distribution in the soil layer

Method used

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  • A gas sampling system and monitoring method for monitoring CO2 movement process between atmosphere and soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] combine figure 1 As shown, a method for monitoring CO between atmosphere and soil 2 A moving gas sampling system, including isolators and filters; where,

[0036] The isolation device includes a cylinder 2, a gasket 7 inside the cylinder, and two magnets 10 adsorbed on the upper and lower sides of the cylinder side wall; wherein the cylinder is provided with a top cover 1 and a bottom cover 3 with a diameter of 10 cm on the upper and lower sides. , the top cover is provided with an air inlet 6, an air outlet 5 and a tracer gas injection hole 8, and both the air inlet and the air outlet are provided with a valve 13;

[0037] The filtering device includes a gas washing bottle 9, an air inlet pipe 15 and an air outlet pipe 14 connected to the gas washing bottle; the air inlet pipe and the air outlet pipe are respectively connected with the air outlet and the air inlet of the isolating device. The alkaline solution in the gas washing bottle is a strong alkaline solution

...

Embodiment 2

[0045] Embodiment 2 monitoring method

[0046] Using the above gas sampling system to detect CO between atmosphere and soil 2 A method for monitoring gas movement, comprising the steps of:

[0047] 1) Set up an air extraction hole on the side wall of the cylinder and seal it, drive the cylinder vertically into the soil to be tested to obtain the required undisturbed soil, excavate a soil pit of the same depth on one side of the cylinder, and put the bottom cover Put it into the pit, then move the cylinder to the bottom cover to seal the bottom of the cylinder, then move the cylinder back to the original position, fill the pit, install the gasket on the upper surface of the soil in the cylinder, place the magnet and check whether It can be moved according to the requirements, and the top cover is buckled to seal to seal the tracer gas injection hole on it, and the air inlet and air outlet are connected to the filter device to form a sealed system;

[0048] 2) Open the inlet a...

Embodiment 3

[0050] Example 3 Monitoring CO 2 Gas mass flow process

[0051] 1) Set up an air extraction hole on the side wall of the cylinder and seal it, drive the cylinder vertically into the soil to be tested to obtain the required undisturbed soil, excavate a soil pit of the same depth on one side of the cylinder, put the bottom cover Put the cylinder into the pit, then move the cylinder to the bottom cover, cover the top cover, carefully take out the cylinder with the undisturbed soil, and inactivate the soil in the cylinder, and try to keep the original state of the soil during the process. does not leak from the cylinder;

[0052] After sealing the cylinder body with a top cover and a bottom cover, in order to avoid a large amount of water entering the steel ring during the inactivation process, wrap the entire cylinder body tightly with towels and gauze, and the thickness of the wrapping layer is 3-5cm.

[0053] 2) Bury the cylinder with the soil inactivation treatment in its or...

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Abstract

The invention relates to a gas sampling system and a monitoring method thereof for monitoring a CO2 motion process between atmosphere and soil. The gas sampling system comprises an isolating device and a filter unit, wherein the isolating device comprises a barrel, a sealing gasket and a magnet; the filter unit comprises a gas washing bottle, as well as a gas inlet pipe and a gas outlet pipe connected to the gas washing bottle; and alkaline liquor in the gas washing bottle is a strong-alkali solution. The gas sampling system disclosed by the invention can vividly reveal the CO2 gas motion process between the atmosphere and the soil in combination with gas isotopic tracing; as improvement and innovation of an existing research method, the system can be used for detecting the absorption amount of CO2 gas occurring between the atmosphere and the soil in a quantitative mode, and the system is of significance in researching CO2 gas absorption amount of soil and CO2 distribution condition, and in monitoring the integral falling mass flow rate of CO2 gas in the soil caused by rainwater infiltration.

Description

technical field [0001] The invention relates to the field of soil environment detection, in particular to a method for monitoring CO between atmosphere and soil 2 A moving gas sampling system and monitoring method. Background technique [0002] Atmosphere-soil CO 2 The process of exercise has always attracted much attention. In recent years, more and more studies have shown that soil has the ability to absorb atmospheric CO 2 The role of its essence is that CO in the atmosphere 2 The gas moves into the soil. However, there is no effective method to directly prove that soil has the ability to absorb CO 2 The role of gases, especially involving soil adsorption of CO 2 The amount of gas and the adsorbed CO 2 There are few studies on the distribution in the soil layer. Therefore, for a more in-depth study of atmospheric CO 2 For the movement of gas in soil, it is necessary to improve the existing research systems and methods. Contents of the invention [0003] Aiming...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 张宇清刘振秦树高法科宇
Owner BEIJING FORESTRY UNIVERSITY