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Biomass charcoal digestion method

A biochar and digestion instrument technology, applied in the preparation of test samples, etc., can solve the problem of low accuracy of test results, achieve complete destruction, low blank value, and improve detection efficiency

Inactive Publication Date: 2019-07-12
南京三聚生物质新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defect that the accuracy of the detection results is not high after the existing digestion method pre-treats the biochar, thereby providing a biochar digestion method

Method used

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Experimental program
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Effect test

Embodiment 1

[0028] The present embodiment provides a kind of digestion method of biochar, comprises the steps:

[0029] (1) Weigh 0.05 g of air-dried crop straw charcoal with a particle size of 1 mm, place it at the bottom of the digestion tube, add 5 mL of concentrated sulfuric acid, shake well, and place it overnight;

[0030] (2) Place the above-mentioned digestion tube in a temperature-controlled digestion apparatus, raise the temperature to 180°C at a uniform speed, and keep it warm for 30 minutes; continue to raise the temperature at a uniform speed to 250°C, and keep it warm for 20 minutes; continue to raise the temperature at a uniform speed to 310°C, and keep it warm for 40 minutes;

[0031] Wherein, when the temperature rises to 250°C and a large amount of white smoke is no longer produced in the digestion tube, take out the digestion tube, add 30wt% hydrogen peroxide solution in 3 times, mix well, put it back into the temperature-controlled digestion apparatus, and continue dige...

Embodiment 2

[0034] The present embodiment provides a kind of digestion method of biochar, comprises the steps:

[0035] (1) Weigh 0.05 g of air-dried crop straw charcoal with a particle size of 1 mm, place it at the bottom of the digestion tube, add 4 mL of concentrated sulfuric acid, shake well, and place it overnight;

[0036] (2) Place the above-mentioned digestion tube in a temperature-controlled digestion apparatus, raise the temperature to 180°C at a uniform speed, and keep it warm for 30 minutes; continue to raise the temperature at a uniform speed to 250°C, and keep it warm for 20 minutes; continue to raise the temperature at a uniform speed to 300°C, and keep it warm for 40 minutes;

[0037] Wherein, when the temperature rises to 250°C and a large amount of white smoke is no longer produced in the digestion tube, take out the digestion tube, add 30wt% hydrogen peroxide solution in 5 times, mix well, put it back into the temperature-controlled digestion apparatus, and continue dige...

Embodiment 3

[0040] The present embodiment provides a kind of digestion method of biochar, comprises the steps:

[0041] (1) Weigh 0.05 g of air-dried crop straw charcoal with a particle size of 1 mm, place it at the bottom of the digestion tube, add 6 mL of concentrated sulfuric acid, shake well, and place it overnight;

[0042] (2) Place the above-mentioned digestion tube in a temperature-controlled digestion apparatus, raise the temperature to 180°C at a uniform speed, and keep it warm for 30 minutes; continue to raise the temperature to 250°C at a uniform speed, and keep it warm for 20 minutes; continue to raise the temperature to 360°C at a uniform speed, and keep it warm for 40 minutes;

[0043] Wherein, when the temperature rises to 250°C and a large amount of white smoke is no longer produced in the digestion tube, take out the above digestion tube, add 30wt% hydrogen peroxide solution in 4 times, mix well, put it back into the temperature-controlled digestion apparatus, and continu...

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Abstract

The invention relates to the technical field of biomass charcoal nutrient element detection, and particularly discloses a method biomass charcoal digestion method. According to the method, concentrated sulfuric acid is firstly added to biomass charcoal; and after the decomposition of most of the organic matters in the sample, hydrogen peroxide solution is gradually added to further oxidize the organic matters until the digestion solution is clear and transparent. According to the method, the concentrated sulfuric acid and the hydrogen peroxide are separately added in sequence, and the hydrogenperoxide is added in batches, so that the condition that too many bubbles are generated to cause sample loss is avoided. According to the method, the biomass charcoal is under the combined action ofthe concentrated sulfuric acid and the hydrogen peroxide, and the organic matters in the biomass charcoal are completely digested and converted into corresponding inorganic matters, thereby realizingthe combined determination of various nutrient elements in the same digestion liquid, and greatly improving the detection efficiency; and the organic matters are completely destroyed, the blank valueis low, and the correctness and repeatability of the detection results are good.

Description

technical field [0001] The invention relates to the technical field of detection of biomass charcoal nutrient elements, in particular to a digestion method of biomass charcoal. Background technique [0002] All living and growing organic substances are collectively referred to as biomass, including plants, animals and microorganisms. Biomass is the fourth largest energy source after coal, oil, and natural gas. It has the advantages of cleanness, regeneration, wide distribution, and "net zero emission" of carbon dioxide. Biomass charcoal is formed by pyrolyzing shredded or formed biomass raw materials such as crop stalks and other organic matter and its derivatives at low or relatively low temperatures in an oxygen-limited or anaerobic environment. It is a solid material with high stability and other characteristics. It can be applied to the soil as a soil improver, which can not only improve the nutrient utilization rate and reduce nutrient leaching loss, but also alleviate...

Claims

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Application Information

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IPC IPC(8): G01N1/44
CPCG01N1/44
Inventor 张少明陈玲瑀李海燕李雨陈晨
Owner 南京三聚生物质新材料科技有限公司
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