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Preparation method and application of a compound heavy metal passivator suitable for southern acidic red soil

A heavy metal passivator, acid red technology, applied in the application, fertilizer mixture, calcium fertilizer, etc., can solve the problems of slow plant growth, low survival rate, poor long-term passivation effect, etc., to accelerate fixation and prolong release time Effect

Active Publication Date: 2021-06-25
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the short action time and poor long-term passivation effect of the soil conditioner in the prior art, so that the growth of plants (such as camphor seedlings) is slow and the survival rate is low, thereby providing a suitable Composite heavy metal passivator for southern acidic red soil and preparation method thereof

Method used

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  • Preparation method and application of a compound heavy metal passivator suitable for southern acidic red soil
  • Preparation method and application of a compound heavy metal passivator suitable for southern acidic red soil
  • Preparation method and application of a compound heavy metal passivator suitable for southern acidic red soil

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Effect test

Embodiment 1

[0035] The raw material composition of core particle in the present embodiment is: magnetic ferric oxide 10kg, lime nitrogen 2kg, binder is: sodium carboxymethyl cellulose 0.2kg and water 1.8kg;

[0036] The raw material composition of the slow-release layer is: humic acid mineral powder 10kg, nitrogen, phosphorus and potassium fertilizer 10kg, binder: sodium carboxymethyl cellulose 0.4kg and water 3.6kg, slow-release material: sodium alginate 5kg and chitosan 5kg;

[0037] The raw material composition of the quick-release layer is: 30kg of humic acid mineral powder, 2.5kg of calcium oxide, 2.5kg of calcium hydroxide, and the binder is: 0.4kg of sodium carboxymethyl cellulose and 3.6kg of water.

[0038] The preparation method of the binder solution is as follows: adding sodium carboxymethylcellulose into water, adjusting the rotation speed of a dispersing homogenizer to 8000 rpm to disperse evenly, and preparing the binder solution.

[0039] The preparation method of composit...

Embodiment 2

[0044] The raw material composition of core particle in the present embodiment is: magnetic ferric oxide 5kg, limestone 10kg, binder is: starch 0.2kg, sodium carboxymethyl cellulose 0.2kg and water 3.6kg;

[0045] The raw material composition of the slow-release layer is: humic acid mineral powder 5kg, nitrogen, phosphorus and potassium fertilizer 30kg, binder: starch 0.5kg, sodium carboxymethyl cellulose 0.5kg and water 9.0kg, slow-release material: sodium alginate 2.5kg and chitosan 2.5kg;

[0046] The raw material composition of the quick-release layer is: humic acid mineral powder 10kg, magnesium oxide 10kg, binder: starch 0.5kg, carboxymethyl cellulose sodium 0.5kg and water 9.0kg.

[0047] The preparation method of the binder solution is as follows: adding starch and sodium carboxymethylcellulose into water respectively, adjusting the rotating speed of a dispersing homogenizer to 12000 rpm to disperse evenly, then mixing, and stirring magnetically for 10 minutes to prepa...

Embodiment 3

[0053] The raw material composition of core particle in the present embodiment is: magnetic ferric oxide 7.5kg, magnesium carbonate 6kg, binder is: starch 0.15kg, sodium carboxymethyl cellulose 0.15kg and water 2.7kg;

[0054] The raw material composition of the slow-release layer is: humic acid mineral powder 7.5kg, nitrogen, phosphorus and potassium fertilizer 20kg, binder: starch 0.4kg, sodium carboxymethyl cellulose 0.4kg and water 7.2kg, slow-release material: sodium alginate 3kg and chitosan 4kg;

[0055] The raw materials of the quick-release layer are: humic acid mineral powder 20kg, calcium hydroxide 7.5kg, binders: starch 0.4kg, carboxymethylcellulose sodium 0.4kg and water 7.2kg.

[0056] The preparation method of the binder solution is as follows: adding starch and sodium carboxymethylcellulose into water respectively, adjusting the rotating speed of a dispersing homogenizer to 8000 rpm to disperse evenly, then mixing, and stirring magnetically for 30 minutes to pr...

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Abstract

The invention discloses a preparation method and application of a composite heavy metal passivator suitable for southern acidic red soil. The composite heavy metal passivator includes core particles from the inside to the outside, a slow-release layer covering the surface of the core particles and a covering layer. The quick-release layer on the surface of the slow-release layer, in parts by weight, the core particles include 5-10 parts of heavy metal adsorption materials, 2-10 parts of acid-modifying substances and 2-5 parts of binders; The release layer includes 5-10 parts of humic acid mineral powder, 10-30 parts of nitrogen, phosphorus and potassium fertilizer, 4-10 parts of adhesive and 5-10 parts of slow-release material; the quick-release layer includes 10-30 parts of humic acid mineral powder , 5-10 parts of acid-changing substances and 4-10 parts of adhesives. The composite heavy metal passivator of the present invention can passivate effective heavy metals in acidic red soil, significantly reduce its content, can quickly play a role, shorten the soil improvement period, and can continuously release long-term soil improvement; and also has the ability to improve soil acidity, supply The efficacy of plant nutrients can improve the survival rate of seedlings and promote their growth and development.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a preparation method and application of a compound heavy metal passivator suitable for southern acidic red soil. Background technique [0002] Camphor tree, with dense leaves, large crown and strong shade, majestic tree, can smoke and block dust, conserve water, fix soil and prevent sand, and beautify the environment. It is a common tree species for greening in southern cities and plays a positive role in improving the ecological environment of urban areas. It is often planted in industrial and mining enterprise parks, residential quarters, schools, institutions, factories, roadsides or other densely populated urban areas. However, in recent years, with the acceleration of urbanization and the needs of social development, the unreasonable mining of mineral resources by industrial and mining enterprises, the wanton discharge of "three wastes" in industrial production, etc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/40C05G3/80C05G5/12C05G5/30
CPCC05C7/00C05G3/00C05G3/80C05G5/30C05D3/00C05D3/02C05D9/02C05F11/02
Inventor 张杰金志农刘佳徐昌旭张海燕吕雄伟赵娇金晓芳肖祖飞肖昌龙
Owner NANCHANG INST OF TECH
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