A method for simulating and detecting the distribution of colored soluble components during soil freeze-thaw
A soluble, freeze-thaw technology, applied in the field of soil research, can solve the problems of inconvenient, incapable real-time quantitative monitoring of components, and damage to soil structure, etc., and achieves the effects of convenient control, good freeze-thaw simulation effect, and simple structure
Active Publication Date: 2020-10-27
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology
However, in the previous research methods, the soil after freezing and thawing was generally sampled, which not only destroyed the structure of the soil, but also could not carry out real-time quantitative monitoring of the components during the freezing and thawing process, so it could not be true and accurate. reflect the distribution of components in the soil
[0003] It can be seen that the above-mentioned existing research methods on the component distribution of soil freeze-thaw process obviously still have inconvenience and defects, and need to be further improved urgently.
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[0031] In order to detect the law of the distribution of colored soluble components in the process of soil freeze-thaw, the present invention first adopts a soil freeze-thaw simulation device, which uses a microfluidic chip as the simulation main body, and is equipped with a temperature control device to control its temperature To simulate the freeze-thaw cycle process of soil, the device can simply, scientifically and reasonably simulate the freeze-thaw process of soil under natural conditions indoors. Based on the detection of the distribution of the color possibility components in the freeze-thaw process by the device, it can naturally and truly reflect the distribution law of the color possibility components in the corresponding soil.
[0032] like figure 1 As shown, it is a schematic diagram of the structure of the microfluidic chip, in which a porous media network model is built to simulate the spatial structure of the pore distribution in the soil. Complexity, and allo...
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The present invention discloses a method for simulating and detecting the distribution of colored soluble components in a soil freezing and thawing process. The soil freezing and thawing process is simulated by using a microfluidic chip with a temperature control device. The method comprises: S1: performing freeze-thaw processing on the microfluidic chip injected with a colored soluble component solution to control the freezing speed and direction, and obtaining the distribution curve of the gray value with the distance; S2: fitting the distribution curve of the gray value with the distance obtained in S1 with the fitting curve between the standard solution concentration and the gray value to obtain the concentration distribution of the colored soluble components of the microfluidic chip during the freezing and thawing process. According to the technical scheme of the present invention, without directly performing sampling on the soil and without damaging the soil environment, the components in the freezing and thawing process can be intuitively and quantitatively monitored in real time by using the microfluidic chip, and the distribution law of the components in the soil can be truly and accurately reflected.
Description
technical field [0001] The invention relates to the field of soil research, in particular to a method for simulating and detecting the distribution of colored soluble components in the process of freezing and thawing soil. Background technique [0002] Soil is a multiphase complex system composed of solid, liquid and gas. Under the action of freezing and thawing in permafrost regions or seasonally frozen regions, the physical and chemical properties of soil have undergone great changes, especially for the presence of The solution has a significant effect. Along with the ice-water phase transition, the water in the soil and the components dissolved in it will redistribute in the soil. Therefore, whether the distribution characteristics of typical pollutant components in soil can be accurately obtained is the key to exploring the migration behavior and impact mechanism of typical pollutant components under freeze-thaw conditions. However, in the previous research methods, th...
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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 陈长夫刘明柱陈鸿汉马翠艳黄欢莫小杰
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)