Grading continuous extraction method of humic acid and its basic element in soil

A humic acid and soil technology, applied in the field of extracting humic acid and humin in soil organic matter, can solve the problems of separation and analysis difficulties, single information, etc., and achieve the effect of avoiding excessive alkalinity and reducing the probability of alkaline hydrolysis

Inactive Publication Date: 2006-01-11
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Abstract
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Problems solved by technology

Therefore, after analysis and determination of humic acid or humin, only a single information can be obtained
Since humic acid and humin are highly complex mixtures of organic macromolecular compounds, the molecular structures of their components are very similar, which makes separation and analysis difficult.
The best solution is to highly separate humic acid and humin so that they become components of a single chemical structure, but current scientific and technological means cannot do this, so partial separation is currently effective and feasible way of

Method used

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  • Grading continuous extraction method of humic acid and its basic element in soil

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Embodiment Construction

[0028] The present invention has been applied in the Hundred Talents Program (Functional Effect of Black Soil Organic Matter on Agricultural Sustainable Development and Environmental Protection) of Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences. During the course of the project, humic acid and humin were extracted from black soil in Heilongjiang, China according to this method, and good results were obtained. The details are as follows:

[0029] The soil samples were extracted 23 times, resulting in 23 samples of humic acid and 2 samples of humin. The obtained samples were analyzed by Fourier transform infrared, ultraviolet, elemental analysis, nuclear magnetic resonance and other analytical means.

[0030] name

[0031] From Table 1, we can see that there are significant differences between the samples proposed each time, and there are obvious regular changes. Through infrared analysis, ultraviolet analysis, and nuclear magnet...

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Abstract

A process for continuously extracting Humic acid and Humin from soil and classifying features that the components of extracting liquid are improved to prevent the extract from being alkali-hydrolyzed, and the extract is classified in the extracting procedure.

Description

technical field [0001] The invention belongs to a method for extracting soil organic matter in the technical field of agricultural production, specifically a new method for extracting humic acid and humin in soil organic matter. technical background [0002] Humic acid and humin are the main components of soil organic matter, and its main component is a mixture of high-molecular organic matter. The condition of soil organic matter in the soil determines the physical, chemical and biological properties of the soil, as well as its health and soil productivity. Therefore, soil science researchers both at home and abroad attach great importance to the study of soil organic matter. As the core components of soil organic matter, humic acid and humin have become a hotspot and a breakthrough in soil research. [0003] The traditional method of extracting humic acid and humin generally uses sodium hydroxide solution or a mixed solution of sodium hydroxide and sodium pyrophosphate, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H5/00C08H99/00
Inventor 刘居东邢宝山韩晓增
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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