Soil heavy metal effective state regulating agent based on humic acid and application thereof

The technology of a heavy metal passivator and humic acid is applied in the fields of environmental protection and agriculture to achieve the effect of improving the effect.

Active Publication Date: 2019-05-21
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the use of humic acid in the treatment of heavy metals in soil has caused confusion

Method used

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  • Soil heavy metal effective state regulating agent based on humic acid and application thereof
  • Soil heavy metal effective state regulating agent based on humic acid and application thereof
  • Soil heavy metal effective state regulating agent based on humic acid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Humic acid, purchased from Shandong Innovation Humic Acid Technology Co., Ltd., is humic acid from weathered coal mines. The total humic acid content is greater than 70% (on a dry basis), and the dissolution rate is 14.17% (on a dry basis). . The dissolution rate of humic acid was measured at a solid-to-liquid ratio of 2:50, the same below.

[0027] Put the humic acid into the DM-04L variable frequency planetary ball mill. The diameters of the large, medium and small balls of the ball mill are 10mm, 5mm and 3mm respectively, and the ratio of the large, medium and small balls is 1:4: 5. Put humic acid into the spherical tank of the ball mill according to the volume of 30% of the spherical tank, and grind for 90 minutes at 450 RPM to obtain the ground humic acid. Take 2 kg of ground humic acid, add 50L of distilled water, shake or stir for 24 hours, centrifuge at 5000 RPM for 5 minutes, and separate solid and liquid to obtain humic acid solution and humic acid filter res...

Embodiment 2

[0030] Humic acid, purchased from Shandong Innovation Humic Acid Technology Co., Ltd., is humic acid from weathered coal mines. The total humic acid content is greater than 70% (on a dry basis), and the dissolution rate is 14.17% (on a dry basis). .

[0031] Put the humic acid into the DM-04L frequency conversion planetary ball mill, the diameters of the large ball, medium ball and small ball of the ball mill are 10mm, 5mm and 3mm respectively.

[0032] Put humic acid into the spherical tank of the ball mill according to the volume of 30% of the spherical tank, the ratio of large balls, medium balls and small balls is 1:4:5, and grind for 150min at 250RPM to get the humic acid after grinding , the dissolution rate of humic acid after grinding was 14.33%.

[0033] Take 2 kg of ground humic acid, add 50L of distilled water, shake or stir for 24 hours, centrifuge at 5000 RPM for 5 minutes, and separate solid and liquid to obtain humic acid solution and humic acid filter residue,...

Embodiment 3

[0035] Humic acid, purchased from Shandong Innovation Humic Acid Technology Co., Ltd., is humic acid from weathered coal mines. The total humic acid content is greater than 70% (on a dry basis), and the dissolution rate is 14.17% (on a dry basis). .

[0036] The diameters of large balls, medium balls and small balls of the ball mill are 10mm, 5mm and 3mm respectively, and the ratio of large balls, medium balls and small balls is 1:4:5.

[0037] Put humic acid into the spherical tank of the ball mill according to the volume of 10% of the spherical tank, and grind for 90 minutes at a speed of 250 RPM to obtain humic acid after grinding. The dissolution rate of humic acid after grinding is 14.50%.

[0038] Take 2 kg of ground humic acid, add 50L of distilled water, shake or stir for 24 hours, centrifuge at 5000 RPM for 5 minutes, and separate solid and liquid to obtain humic acid solution and humic acid filter residue, in which the humic acid is dissolved The liquid is the soil ...

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Abstract

The invention belongs to the technical fields of environment protection and agriculture, and relates to a soil heavy metal effective state regulating agent based on humic acid and application thereof.The regulating agent is prepared by grinding humic acid, then adding a proper amount of water, vibrating the mixture, performing solid liquid separation to obtain a humic acid solution and humic acidfilter dregs, wherein the humic acid solution is a soil heavy metal activator component, and the humic acid filter dregs are a soil heavy metal passivator component. The activator component can be used for enhancing soil heavy metal extraction and repairing capabilities of hyperaccumulator plants, while the passivator component can be used for reducing heavy metal absorption of crops.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and agriculture, and relates to a humic acid source soil heavy metal effective state regulator and application thereof. . Background technique [0002] Humic acid is a macromolecular polymer that exists widely in nature, and it can have an important impact on the biogeochemical behavior of heavy metals through adsorption, exchange, and complexation. It is generally believed that humic acid can promote the transformation of heavy metals from the exchange state that is easy to be used by plants to the organic binding state and residue state that are difficult to use, and it is used as a heavy metal passivation agent for field application. However, some studies have found that the application of humic acid has an activation effect on soil heavy metals. In this way, the application of humic acid in the treatment of heavy metals in soil has caused confusion. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/32B09C1/08C09K101/00
Inventor 郭彬刘琛李凝玉林义成李华傅庆林丁能飞
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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